Overall refactoring of the STOMP codec

- StompObject -> StompSubframe
- StompFrame -> StompHeadersSubframe
- StompContent -> StompContntSubframe
- FullStompFrame -> StompFrame
- StompEncoder/Decoder -> StompSubframeEncoder/Decoder
- StompAggregator -> StompSubframeAggregator
- Simplify the example
- Update Javadoc
- Miscellaneous cleanup

codec-stomp/pom.xml

@@ -20,7 +20,7 @@
   <parent>
     <groupId>io.netty</groupId>
     <artifactId>netty-parent</artifactId>
-    <version>4.1.0.Alpha1-SNAPSHOT</version>
+    <version>5.0.0.Alpha2-SNAPSHOT</version>
   </parent>
 
   <artifactId>netty-codec-stomp</artifactId>

codec-stomp/src/main/java/io/netty/handler/codec/stomp/DefaultFullStompFrame.java

@@ -1,105 +0,0 @@
-/*
- * Copyright 2014 The Netty Project
- *
- * The Netty Project licenses this file to you under the Apache License,
- * version 2.0 (the "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at:
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-package io.netty.handler.codec.stomp;
-
-import io.netty.buffer.ByteBuf;
-import io.netty.buffer.Unpooled;
-import io.netty.util.CharsetUtil;
-
-/**
- * Default implementation of {@link FullStompFrame}.
- */
-public class DefaultFullStompFrame extends DefaultStompFrame implements FullStompFrame {
-    private final ByteBuf content;
-
-    public DefaultFullStompFrame(StompCommand command) {
-        this(command, Unpooled.buffer(0));
-        if (command == null) {
-            throw new NullPointerException("command");
-        }
-    }
-
-    public DefaultFullStompFrame(StompCommand command, ByteBuf content) {
-        super(command);
-        if (content == null) {
-            throw new NullPointerException("content");
-        }
-        this.content = content;
-    }
-
-    @Override
-    public ByteBuf content() {
-        return content;
-    }
-
-    @Override
-    public FullStompFrame copy() {
-        return new DefaultFullStompFrame(command, content.copy());
-    }
-
-    @Override
-    public FullStompFrame duplicate() {
-        return new DefaultFullStompFrame(command, content.duplicate());
-    }
-
-    @Override
-    public int refCnt() {
-        return content.refCnt();
-    }
-
-    @Override
-    public FullStompFrame retain() {
-        content.retain();
-        return this;
-    }
-
-    @Override
-    public FullStompFrame retain(int increment) {
-        content.retain();
-        return this;
-    }
-
-    @Override
-    public FullStompFrame touch() {
-        content.touch();
-        return this;
-    }
-
-    @Override
-    public FullStompFrame touch(Object hint) {
-        content.touch(hint);
-        return this;
-    }
-
-    @Override
-    public boolean release() {
-        return content.release();
-    }
-
-    @Override
-    public boolean release(int decrement) {
-        return content.release(decrement);
-    }
-
-    @Override
-    public String toString() {
-        return "DefaultFullStompFrame{" +
-            "command=" + command +
-            ", headers=" + headers +
-            ", content=" + content.toString(CharsetUtil.UTF_8) +
-            '}';
-    }
-}

codec-stomp/src/main/java/io/netty/handler/codec/stomp/DefaultLastStompContentSubframe.java

@@ -18,52 +18,52 @@ package io.netty.handler.codec.stomp;
 import io.netty.buffer.ByteBuf;
 
 /**
- * The default implementation for the {@link LastStompContent}.
+ * The default implementation for the {@link LastStompContentSubframe}.
  */
-public class DefaultLastStompContent extends DefaultStompContent implements LastStompContent {
+public class DefaultLastStompContentSubframe extends DefaultStompContentSubframe implements LastStompContentSubframe {
-    public DefaultLastStompContent(ByteBuf content) {
+
+    public DefaultLastStompContentSubframe(ByteBuf content) {
         super(content);
     }
 
     @Override
-    public DefaultLastStompContent retain() {
+    public DefaultLastStompContentSubframe retain() {
         super.retain();
         return this;
     }
 
     @Override
-    public LastStompContent retain(int increment) {
+    public LastStompContentSubframe retain(int increment) {
         super.retain(increment);
         return this;
     }
 
     @Override
-    public LastStompContent touch() {
+    public LastStompContentSubframe touch() {
         super.touch();
         return this;
     }
 
     @Override
-    public LastStompContent touch(Object hint) {
+    public LastStompContentSubframe touch(Object hint) {
         super.touch(hint);
         return this;
     }
 
     @Override
-    public LastStompContent copy() {
+    public LastStompContentSubframe copy() {
-        return new DefaultLastStompContent(content().copy());
+        return new DefaultLastStompContentSubframe(content().copy());
     }
 
     @Override
-    public LastStompContent duplicate() {
+    public LastStompContentSubframe duplicate() {
-        return new DefaultLastStompContent(content().duplicate());
+        return new DefaultLastStompContentSubframe(content().duplicate());
     }
 
     @Override
     public String toString() {
         return "DefaultLastStompContent{" +
-                "decoderResult=" + getDecoderResult() +
+                "decoderResult=" + decoderResult() +
                 '}';
     }
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/DefaultStompContentSubframe.java

@@ -20,13 +20,13 @@ import io.netty.buffer.ByteBuf;
 import io.netty.handler.codec.DecoderResult;
 
 /**
- * The default {@link StompContent} implementation.
+ * The default {@link StompContentSubframe} implementation.
  */
-public class DefaultStompContent implements StompContent {
+public class DefaultStompContentSubframe implements StompContentSubframe {
     private DecoderResult decoderResult;
     private final ByteBuf content;
 
-    public DefaultStompContent(ByteBuf content) {
+    public DefaultStompContentSubframe(ByteBuf content) {
         if (content == null) {
             throw new NullPointerException("content");
         }
@@ -39,13 +39,13 @@ public class DefaultStompContent implements StompContent {
     }
 
     @Override
-    public StompContent copy() {
+    public StompContentSubframe copy() {
-        return new DefaultStompContent(content().copy());
+        return new DefaultStompContentSubframe(content().copy());
     }
 
     @Override
-    public StompContent duplicate() {
+    public StompContentSubframe duplicate() {
-        return new DefaultStompContent(content().duplicate());
+        return new DefaultStompContentSubframe(content().duplicate());
     }
 
     @Override
@@ -54,25 +54,25 @@ public class DefaultStompContent implements StompContent {
     }
 
     @Override
-    public StompContent retain() {
+    public StompContentSubframe retain() {
         content().retain();
         return this;
     }
 
     @Override
-    public StompContent retain(int increment) {
+    public StompContentSubframe retain(int increment) {
         content().retain(increment);
         return this;
     }
 
     @Override
-    public StompContent touch() {
+    public StompContentSubframe touch() {
-        content.toString();
+        content.touch();
         return this;
     }
 
     @Override
-    public StompContent touch(Object hint) {
+    public StompContentSubframe touch(Object hint) {
         content.touch(hint);
         return this;
     }
@@ -88,13 +88,13 @@ public class DefaultStompContent implements StompContent {
     }
 
     @Override
-    public DecoderResult getDecoderResult() {
+    public DecoderResult decoderResult() {
         return decoderResult;
     }
 
     @Override
-    public void setDecoderResult(DecoderResult result) {
+    public void setDecoderResult(DecoderResult decoderResult) {
-        this.decoderResult = result;
+        this.decoderResult = decoderResult;
     }
 
     @Override

codec-stomp/src/main/java/io/netty/handler/codec/stomp/DefaultStompFrame.java

@@ -15,48 +15,92 @@
  */
 package io.netty.handler.codec.stomp;
 
-import io.netty.handler.codec.DecoderResult;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.util.CharsetUtil;
 
 /**
  * Default implementation of {@link StompFrame}.
  */
-public class DefaultStompFrame implements StompFrame {
+public class DefaultStompFrame extends DefaultStompHeadersSubframe implements StompFrame {
-    protected final StompCommand command;
+
-    protected DecoderResult decoderResult;
+    private final ByteBuf content;
-    protected final StompHeaders headers = new StompHeaders();
 
     public DefaultStompFrame(StompCommand command) {
+        this(command, Unpooled.buffer(0));
         if (command == null) {
             throw new NullPointerException("command");
         }
-        this.command = command;
+    }
+
+    public DefaultStompFrame(StompCommand command, ByteBuf content) {
+        super(command);
+        if (content == null) {
+            throw new NullPointerException("content");
+        }
+        this.content = content;
     }
 
     @Override
-    public StompCommand command() {
+    public ByteBuf content() {
-        return command;
+        return content;
     }
 
     @Override
-    public StompHeaders headers() {
+    public StompFrame copy() {
-        return headers;
+        return new DefaultStompFrame(command, content.copy());
     }
 
     @Override
-    public DecoderResult getDecoderResult() {
+    public StompFrame duplicate() {
-        return decoderResult;
+        return new DefaultStompFrame(command, content.duplicate());
     }
 
     @Override
-    public void setDecoderResult(DecoderResult decoderResult) {
+    public int refCnt() {
-        this.decoderResult = decoderResult;
+        return content.refCnt();
+    }
+
+    @Override
+    public StompFrame retain() {
+        content.retain();
+        return this;
+    }
+
+    @Override
+    public StompFrame retain(int increment) {
+        content.retain();
+        return this;
+    }
+
+    @Override
+    public StompFrame touch() {
+        content.touch();
+        return this;
+    }
+
+    @Override
+    public StompFrame touch(Object hint) {
+        content.touch(hint);
+        return this;
+    }
+
+    @Override
+    public boolean release() {
+        return content.release();
+    }
+
+    @Override
+    public boolean release(int decrement) {
+        return content.release(decrement);
     }
 
     @Override
     public String toString() {
-        return "StompFrame{" +
+        return "DefaultFullStompFrame{" +
             "command=" + command +
             ", headers=" + headers +
+            ", content=" + content.toString(CharsetUtil.UTF_8) +
             '}';
     }
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/DefaultStompHeadersSubframe.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2014 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+package io.netty.handler.codec.stomp;
+
+import io.netty.handler.codec.DecoderResult;
+
+/**
+ * Default implementation of {@link StompHeadersSubframe}.
+ */
+public class DefaultStompHeadersSubframe implements StompHeadersSubframe {
+
+    protected final StompCommand command;
+    protected DecoderResult decoderResult;
+    protected final StompHeaders headers = new StompHeaders();
+
+    public DefaultStompHeadersSubframe(StompCommand command) {
+        if (command == null) {
+            throw new NullPointerException("command");
+        }
+        this.command = command;
+    }
+
+    @Override
+    public StompCommand command() {
+        return command;
+    }
+
+    @Override
+    public StompHeaders headers() {
+        return headers;
+    }
+
+    @Override
+    public DecoderResult decoderResult() {
+        return decoderResult;
+    }
+
+    @Override
+    public void setDecoderResult(DecoderResult decoderResult) {
+        this.decoderResult = decoderResult;
+    }
+
+    @Override
+    public String toString() {
+        return "StompFrame{" +
+            "command=" + command +
+            ", headers=" + headers +
+            '}';
+    }
+}

codec-stomp/src/main/java/io/netty/handler/codec/stomp/FullStompFrame.java

@@ -1,41 +0,0 @@
-/*
- * Copyright 2014 The Netty Project
- *
- * The Netty Project licenses this file to you under the Apache License,
- * version 2.0 (the "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at:
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-package io.netty.handler.codec.stomp;
-
-/**
- * Combines {@link StompFrame} and {@link LastStompContent} into one
- * frame. So it represent a <i>complete</i> STOMP frame.
- */
-public interface FullStompFrame extends StompFrame, LastStompContent {
-    @Override
-    FullStompFrame copy();
-
-    @Override
-    FullStompFrame duplicate();
-
-    @Override
-    FullStompFrame retain();
-
-    @Override
-    FullStompFrame retain(int increment);
-
-    @Override
-    FullStompFrame touch();
-
-    @Override
-    FullStompFrame touch(Object hint);
-
-}

codec-stomp/src/main/java/io/netty/handler/codec/stomp/LastStompContentSubframe.java

@@ -20,47 +20,47 @@ import io.netty.buffer.Unpooled;
 import io.netty.handler.codec.DecoderResult;
 
 /**
- * The last {@link StompContent} which signals the end of the content batch
+ * The last {@link StompContentSubframe} which signals the end of the content batch
  * <p/>
  * Note, even when no content is emitted by the protocol, an
- * empty {@link LastStompContent} is issued to make the upstream parsing
+ * empty {@link LastStompContentSubframe} is issued to make the upstream parsing
  * easier.
  */
-public interface LastStompContent extends StompContent {
+public interface LastStompContentSubframe extends StompContentSubframe {
 
-    LastStompContent EMPTY_LAST_CONTENT = new LastStompContent() {
+    LastStompContentSubframe EMPTY_LAST_CONTENT = new LastStompContentSubframe() {
         @Override
         public ByteBuf content() {
             return Unpooled.EMPTY_BUFFER;
         }
 
         @Override
-        public LastStompContent copy() {
+        public LastStompContentSubframe copy() {
             return EMPTY_LAST_CONTENT;
         }
 
         @Override
-        public LastStompContent duplicate() {
+        public LastStompContentSubframe duplicate() {
             return this;
         }
 
         @Override
-        public LastStompContent retain() {
+        public LastStompContentSubframe retain() {
             return this;
         }
 
         @Override
-        public LastStompContent retain(int increment) {
+        public LastStompContentSubframe retain(int increment) {
             return this;
         }
 
         @Override
-        public LastStompContent touch() {
+        public LastStompContentSubframe touch() {
             return this;
         }
 
         @Override
-        public LastStompContent touch(Object hint) {
+        public LastStompContentSubframe touch(Object hint) {
             return this;
         }
 
@@ -80,7 +80,7 @@ public interface LastStompContent extends StompContent {
         }
 
         @Override
-        public DecoderResult getDecoderResult() {
+        public DecoderResult decoderResult() {
             return DecoderResult.SUCCESS;
         }
 
@@ -91,21 +91,20 @@ public interface LastStompContent extends StompContent {
     };
 
     @Override
-    LastStompContent copy();
+    LastStompContentSubframe copy();
 
     @Override
-    LastStompContent duplicate();
+    LastStompContentSubframe duplicate();
 
     @Override
-    LastStompContent retain();
+    LastStompContentSubframe retain();
 
     @Override
-    LastStompContent retain(int increment);
+    LastStompContentSubframe retain(int increment);
 
     @Override
-    LastStompContent touch();
+    LastStompContentSubframe touch();
 
     @Override
-    LastStompContent touch(Object hint);
+    LastStompContentSubframe touch(Object hint);
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompCommand.java

@@ -19,7 +19,18 @@ package io.netty.handler.codec.stomp;
  * STOMP command
  */
 public enum StompCommand {
-    STOMP, CONNECT, CONNECTED, SEND, SUBSCRIBE, UNSUBSCRIBE, ACK, NACK, BEGIN, DISCONNECT, MESSAGE, RECEIPT, ERROR,
+    STOMP,
+    CONNECT,
+    CONNECTED,
+    SEND,
+    SUBSCRIBE,
+    UNSUBSCRIBE,
+    ACK,
+    NACK,
+    BEGIN,
+    DISCONNECT,
+    MESSAGE,
+    RECEIPT,
+    ERROR,
     UNKNOWN
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompConstants.java

@@ -16,12 +16,11 @@
 package io.netty.handler.codec.stomp;
 
 final class StompConstants {
-    public static final byte CR = 13;
-    public static final byte LF = 10;
-    public static final byte NULL = 0;
-    public static final byte COLON = 58;
 
-    private StompConstants() {
+    static final byte CR = 13;
-    }
+    static final byte LF = 10;
+    static final byte NUL = 0;
+    static final byte COLON = 58;
 
+    private StompConstants() { }
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompContentSubframe.java

@@ -16,32 +16,31 @@
 package io.netty.handler.codec.stomp;
 
 import io.netty.buffer.ByteBufHolder;
+import io.netty.channel.ChannelPipeline;
 
 /**
- * An STOMP chunk which is used for STOMP chunked transfer-encoding.
+ * An STOMP chunk which is used for STOMP chunked transfer-encoding. {@link StompSubframeDecoder} generates
- * {@link StompDecoder} generates {@link StompContent} after
+ * {@link StompContentSubframe} after {@link StompHeadersSubframe} when the content is large or the encoding of
- * {@link StompFrame} when the content is large or the encoding of the content
+ * the content is 'chunked.  If you prefer not to receive multiple {@link StompSubframe}s for a single
- * is 'chunked.  If you prefer not to receive {@link StompContent} in your handler,
+ * {@link StompFrame}, place {@link StompSubframeAggregator} after {@link StompSubframeDecoder} in the
- * place {@link StompAggregator} after {@link StompDecoder} in the
+ * {@link ChannelPipeline}.
- * {@link io.netty.channel.ChannelPipeline}.
  */
-public interface StompContent extends ByteBufHolder, StompObject {
+public interface StompContentSubframe extends ByteBufHolder, StompSubframe {
     @Override
-    StompContent copy();
+    StompContentSubframe copy();
 
     @Override
-    StompContent duplicate();
+    StompContentSubframe duplicate();
 
     @Override
-    StompContent retain();
+    StompContentSubframe retain();
 
     @Override
-    StompContent retain(int increment);
+    StompContentSubframe retain(int increment);
 
     @Override
-    StompContent touch();
+    StompContentSubframe touch();
 
     @Override
-    StompContent touch(Object hint);
+    StompContentSubframe touch(Object hint);
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompFrame.java

@@ -16,23 +16,25 @@
 package io.netty.handler.codec.stomp;
 
 /**
- * An interface that defines a Stomp frame
+ * Combines {@link StompHeadersSubframe} and {@link LastStompContentSubframe} into one
- *
+ * frame. So it represent a <i>complete</i> STOMP frame.
- * @see StompFrame
- * @see FullStompFrame
- * @see StompHeaders
  */
-public interface StompFrame extends StompObject {
+public interface StompFrame extends StompHeadersSubframe, LastStompContentSubframe {
-    /**
+    @Override
-     * returns command of this frame
+    StompFrame copy();
-     * @return the command
-     */
-    StompCommand command();
 
-    /**
+    @Override
-     * returns headers of this frame
+    StompFrame duplicate();
-     * @return the headers object
-     */
-    StompHeaders headers();
 
+    @Override
+    StompFrame retain();
+
+    @Override
+    StompFrame retain(int increment);
+
+    @Override
+    StompFrame touch();
+
+    @Override
+    StompFrame touch(Object hint);
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompHeaders.java

@@ -18,16 +18,16 @@ package io.netty.handler.codec.stomp;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
 /**
  * Provides the constants for the standard STOMP header names and values and
- * commonly used utility methods that accesses an {@link StompFrame}.
+ * commonly used utility methods that accesses an {@link StompHeadersSubframe}.
  */
 public class StompHeaders {
+
     public static final String ACCEPT_VERSION = "accept-version";
     public static final String HOST = "host";
     public static final String LOGIN = "login";
@@ -48,28 +48,16 @@ public class StompHeaders {
     public static final String CONTENT_LENGTH = "content-length";
     public static final String CONTENT_TYPE = "content-type";
 
-    public static long getContentLength(StompHeaders headers, long defaultValue) {
-        String contentLength = headers.get(CONTENT_LENGTH);
-        if (contentLength != null) {
-            try {
-                return Long.parseLong(contentLength);
-            } catch (NumberFormatException e) {
-                return defaultValue;
-            }
-        }
-        return defaultValue;
-    }
-
     private final Map<String, List<String>> headers = new HashMap<String, List<String>>();
 
     public boolean has(String key) {
         List<String> values = headers.get(key);
-        return values != null && values.size() > 0;
+        return values != null && !values.isEmpty();
     }
 
     public String get(String key) {
         List<String> values = headers.get(key);
-        if (values != null && values.size() > 0) {
+        if (values != null && !values.isEmpty()) {
             return values.get(0);
         } else {
             return null;
@@ -85,6 +73,7 @@ public class StompHeaders {
         values.add(value);
     }
 
+    @SuppressWarnings("ArraysAsListWithZeroOrOneArgument")
     public void set(String key, String value) {
         headers.put(key, Arrays.asList(value));
     }
@@ -110,8 +99,7 @@ public class StompHeaders {
     }
 
     public void set(StompHeaders headers) {
-        for (Iterator<String> iterator = headers.keySet().iterator(); iterator.hasNext();) {
+        for (String key: headers.keySet()) {
-            String key = iterator.next();
             List<String> values = headers.getAll(key);
             this.headers.put(key, values);
         }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompHeadersSubframe.java

@@ -13,13 +13,22 @@
  * License for the specific language governing permissions and limitations
  * under the License.
  */
-package io.netty.example.stomp;
+package io.netty.handler.codec.stomp;
-
-import io.netty.handler.codec.stomp.FullStompFrame;
 
 /**
- * STOMP frame listener which used as a callback in {@link StompClientHandler}
+ * An interface that defines a {@link StompFrame}'s command and headers.
+ *
+ * @see StompCommand
+ * @see StompHeaders
  */
-public interface StompFrameListener {
+public interface StompHeadersSubframe extends StompSubframe {
-    void onFrame(FullStompFrame frame);
+    /**
+     * Returns command of this frame.
+     */
+    StompCommand command();
+
+    /**
+     * Returns headers of this frame.
+     */
+    StompHeaders headers();
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompSubframe.java

@@ -18,18 +18,17 @@ package io.netty.handler.codec.stomp;
 import io.netty.handler.codec.DecoderResult;
 
 /**
- * Defines a common interface for all {@link StompObject} implementations.
+ * Defines a common interface for all {@link StompSubframe} implementations.
  */
-public interface StompObject {
+public interface StompSubframe {
     /**
      * Returns the result of decoding this object.
      */
-    DecoderResult getDecoderResult();
+    DecoderResult decoderResult();
 
     /**
-     * Updates the result of decoding this object. This method is supposed to be invoked by {@link StompDecoder}.
+     * Updates the result of decoding this object. This method is supposed to be invoked by
-     * Do not call this method unless you know what you are doing.
+     * {@link StompSubframeDecoder}. Do not call this method unless you know what you are doing.
      */
     void setDecoderResult(DecoderResult result);
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompSubframeAggregator.java

@@ -15,28 +15,30 @@
  */
 package io.netty.handler.codec.stomp;
 
-import java.util.List;
-
 import io.netty.buffer.CompositeByteBuf;
 import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelHandler;
 import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPipeline;
 import io.netty.handler.codec.MessageToMessageDecoder;
 import io.netty.handler.codec.TooLongFrameException;
 
+import java.util.List;
+
 /**
- * A {@link io.netty.channel.ChannelHandler} that aggregates an {@link StompFrame}
+ * A {@link ChannelHandler} that aggregates an {@link StompHeadersSubframe}
- * and its following {@link StompContent}s into a single {@link StompFrame} with
+ * and its following {@link StompContentSubframe}s into a single {@link StompFrame}.
- * no following {@link StompContent}s.  It is useful when you don't want to take
+ * It is useful when you don't want to take care of STOMP frames whose content is 'chunked'.  Insert this
- * care of STOMP frames whose content is 'chunked'.  Insert this
+ * handler after {@link StompSubframeDecoder} in the {@link ChannelPipeline}:
- * handler after {@link StompDecoder} in the {@link io.netty.channel.ChannelPipeline}:
  */
-public class StompAggregator extends MessageToMessageDecoder<StompObject> {
+public class StompSubframeAggregator extends MessageToMessageDecoder<StompSubframe> {
-    public static final int DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS = 1024;
+
+    private static final int DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS = 1024;
 
     private int maxCumulationBufferComponents = DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS;
 
     private final int maxContentLength;
-    private FullStompFrame currentFrame;
+    private StompFrame currentFrame;
     private boolean tooLongFrameFound;
     private volatile boolean handlerAdded;
 
@@ -48,7 +50,7 @@ public class StompAggregator extends MessageToMessageDecoder<StompObject> {
      *        If the length of the aggregated content exceeds this value,
      *        a {@link TooLongFrameException} will be raised.
      */
-    public StompAggregator(int maxContentLength) {
+    public StompSubframeAggregator(int maxContentLength) {
         if (maxContentLength <= 0) {
             throw new IllegalArgumentException(
                     "maxContentLength must be a positive integer: " +
@@ -80,23 +82,23 @@ public class StompAggregator extends MessageToMessageDecoder<StompObject> {
     }
 
     @Override
-    protected void decode(ChannelHandlerContext ctx, StompObject msg, List<Object> out) throws Exception {
+    protected void decode(ChannelHandlerContext ctx, StompSubframe msg, List<Object> out) throws Exception {
-        FullStompFrame currentFrame = this.currentFrame;
+        StompFrame currentFrame = this.currentFrame;
-        if (msg instanceof StompFrame) {
+        if (msg instanceof StompHeadersSubframe) {
             assert currentFrame == null;
-            StompFrame frame = (StompFrame) msg;
+            StompHeadersSubframe frame = (StompHeadersSubframe) msg;
-            this.currentFrame = currentFrame = new DefaultFullStompFrame(frame.command(),
+            this.currentFrame = currentFrame = new DefaultStompFrame(frame.command(),
                 Unpooled.compositeBuffer(maxCumulationBufferComponents));
             currentFrame.headers().set(frame.headers());
-        } else if (msg instanceof StompContent) {
+        } else if (msg instanceof StompContentSubframe) {
             if (tooLongFrameFound) {
-                if (msg instanceof LastStompContent) {
+                if (msg instanceof LastStompContentSubframe) {
                     this.currentFrame = null;
                 }
                 return;
             }
             assert currentFrame != null;
-            StompContent chunk = (StompContent) msg;
+            StompContentSubframe chunk = (StompContentSubframe) msg;
             CompositeByteBuf contentBuf = (CompositeByteBuf) currentFrame.content();
             if (contentBuf.readableBytes() > maxContentLength - chunk.content().readableBytes()) {
                 tooLongFrameFound = true;
@@ -109,7 +111,7 @@ public class StompAggregator extends MessageToMessageDecoder<StompObject> {
 
             contentBuf.addComponent(chunk.retain().content());
             contentBuf.writerIndex(contentBuf.writerIndex() + chunk.content().readableBytes());
-            if (chunk instanceof LastStompContent) {
+            if (chunk instanceof LastStompContentSubframe) {
                 out.add(currentFrame);
                 this.currentFrame = null;
             }
@@ -121,7 +123,7 @@ public class StompAggregator extends MessageToMessageDecoder<StompObject> {
     @Override
     public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
         super.handlerAdded(ctx);
-        this.handlerAdded = true;
+        handlerAdded = true;
     }
 
     @Override
@@ -136,7 +138,7 @@ public class StompAggregator extends MessageToMessageDecoder<StompObject> {
     @Override
     public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
         super.handlerRemoved(ctx);
-        this.handlerAdded = false;
+        handlerAdded = false;
         if (currentFrame != null) {
             currentFrame.release();
             currentFrame = null;

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompSubframeDecoder.java

@@ -15,23 +15,25 @@
  */
 package io.netty.handler.codec.stomp;
 
-import java.util.List;
-
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.DecoderException;
 import io.netty.handler.codec.DecoderResult;
 import io.netty.handler.codec.ReplayingDecoder;
 import io.netty.handler.codec.TooLongFrameException;
-import io.netty.handler.codec.stomp.StompDecoder.State;
+import io.netty.handler.codec.stomp.StompSubframeDecoder.State;
+import io.netty.util.internal.AppendableCharSequence;
+import io.netty.util.internal.StringUtil;
 
-import static io.netty.buffer.ByteBufUtil.readBytes;
+import java.util.List;
+import java.util.Locale;
+
+import static io.netty.buffer.ByteBufUtil.*;
 
 /**
- * Decodes {@link ByteBuf}s into {@link StompFrame}s and
+ * Decodes {@link ByteBuf}s into {@link StompHeadersSubframe}s and
- * {@link StompContent}s.
+ * {@link StompContentSubframe}s.
  *
  * <h3>Parameters to control memory consumption: </h3>
  * {@code maxLineLength} the maximum length of line -
@@ -42,31 +44,42 @@ import static io.netty.buffer.ByteBufUtil.readBytes;
  * {@code maxChunkSize}
  * The maximum length of the content or each chunk.  If the content length
  * (or the length of each chunk) exceeds this value, the content or chunk
- * ill be split into multiple {@link StompContent}s whose length is
+ * ill be split into multiple {@link StompContentSubframe}s whose length is
  * {@code maxChunkSize} at maximum.
  *
  * <h3>Chunked Content</h3>
  *
  * If the content of a stomp message is greater than {@code maxChunkSize}
  * the transfer encoding of the HTTP message is 'chunked', this decoder
- * generates multiple {@link StompContent} instances to avoid excessive memory
+ * generates multiple {@link StompContentSubframe} instances to avoid excessive memory
  * consumption. Note, that every message, even with no content decodes with
- * {@link LastStompContent} at the end to simplify upstream message parsing.
+ * {@link LastStompContentSubframe} at the end to simplify upstream message parsing.
  */
-public class StompDecoder extends ReplayingDecoder<State> {
+public class StompSubframeDecoder extends ReplayingDecoder<State> {
-    public static final int DEFAULT_CHUNK_SIZE = 8132;
+
-    public static final int DEFAULT_MAX_LINE_LENGTH = 1024;
+    private static final int DEFAULT_CHUNK_SIZE = 8132;
-    private int maxLineLength;
+    private static final int DEFAULT_MAX_LINE_LENGTH = 1024;
-    private int maxChunkSize;
+
+    enum State {
+        SKIP_CONTROL_CHARACTERS,
+        READ_HEADERS,
+        READ_CONTENT,
+        FINALIZE_FRAME_READ,
+        BAD_FRAME,
+        INVALID_CHUNK
+    }
+
+    private final int maxLineLength;
+    private final int maxChunkSize;
     private int alreadyReadChunkSize;
-    private LastStompContent lastContent;
+    private LastStompContentSubframe lastContent;
     private long contentLength;
 
-    public StompDecoder() {
+    public StompSubframeDecoder() {
         this(DEFAULT_MAX_LINE_LENGTH, DEFAULT_CHUNK_SIZE);
     }
 
-    public StompDecoder(int maxLineLength, int maxChunkSize) {
+    public StompSubframeDecoder(int maxLineLength, int maxChunkSize) {
         super(State.SKIP_CONTROL_CHARACTERS);
         if (maxLineLength <= 0) {
             throw new IllegalArgumentException(
@@ -88,17 +101,18 @@ public class StompDecoder extends ReplayingDecoder<State> {
             case SKIP_CONTROL_CHARACTERS:
                 skipControlCharacters(in);
                 checkpoint(State.READ_HEADERS);
+                // Fall through.
             case READ_HEADERS:
                 StompCommand command = StompCommand.UNKNOWN;
-                StompFrame frame = null;
+                StompHeadersSubframe frame = null;
                 try {
                     command = readCommand(in);
-                    frame = new DefaultStompFrame(command);
+                    frame = new DefaultStompHeadersSubframe(command);
                     checkpoint(readHeaders(in, frame.headers()));
                     out.add(frame);
                 } catch (Exception e) {
                     if (frame == null) {
-                        frame = new DefaultStompFrame(command);
+                        frame = new DefaultStompHeadersSubframe(command);
                     }
                     frame.setDecoderResult(DecoderResult.failure(e));
                     out.add(frame);
@@ -126,27 +140,27 @@ public class StompDecoder extends ReplayingDecoder<State> {
                     }
                     ByteBuf chunkBuffer = readBytes(ctx.alloc(), in, toRead);
                     if ((alreadyReadChunkSize += toRead) >= contentLength) {
-                        lastContent = new DefaultLastStompContent(chunkBuffer);
+                        lastContent = new DefaultLastStompContentSubframe(chunkBuffer);
                         checkpoint(State.FINALIZE_FRAME_READ);
                     } else {
-                        DefaultStompContent chunk;
+                        DefaultStompContentSubframe chunk;
-                        chunk = new DefaultStompContent(chunkBuffer);
+                        chunk = new DefaultStompContentSubframe(chunkBuffer);
                         out.add(chunk);
                     }
                     if (alreadyReadChunkSize < contentLength) {
                         return;
                     }
-                    //fall through
+                    // Fall through.
                 case FINALIZE_FRAME_READ:
                     skipNullCharacter(in);
                     if (lastContent == null) {
-                        lastContent = LastStompContent.EMPTY_LAST_CONTENT;
+                        lastContent = LastStompContentSubframe.EMPTY_LAST_CONTENT;
                     }
                     out.add(lastContent);
                     resetDecoder();
             }
         } catch (Exception e) {
-            StompContent errorContent = new DefaultLastStompContent(Unpooled.EMPTY_BUFFER);
+            StompContentSubframe errorContent = new DefaultLastStompContentSubframe(Unpooled.EMPTY_BUFFER);
             errorContent.setDecoderResult(DecoderResult.failure(e));
             out.add(errorContent);
             checkpoint(State.BAD_FRAME);
@@ -162,7 +176,7 @@ public class StompDecoder extends ReplayingDecoder<State> {
             //do nothing
         }
         if (command == null) {
-            commandStr = commandStr.toUpperCase();
+            commandStr = commandStr.toUpperCase(Locale.US);
             try {
                 command = StompCommand.valueOf(commandStr);
             } catch (IllegalArgumentException iae) {
@@ -176,20 +190,20 @@ public class StompDecoder extends ReplayingDecoder<State> {
     }
 
     private State readHeaders(ByteBuf buffer, StompHeaders headers) {
-        while (true) {
+        for (;;) {
             String line = readLine(buffer, maxLineLength);
-            if (line.length() > 0) {
+            if (!line.isEmpty()) {
-                String[] split = line.split(":");
+                String[] split = StringUtil.split(line, ':');
                 if (split.length == 2) {
                     headers.add(split[0], split[1]);
                 }
             } else {
                 long contentLength = -1;
                 if (headers.has(StompHeaders.CONTENT_LENGTH))  {
-                    contentLength = StompHeaders.getContentLength(headers, 0);
+                    contentLength = getContentLength(headers, 0);
                 } else {
-                    int globalIndex = ByteBufUtil.indexOf(buffer, buffer.readerIndex(),
+                    int globalIndex = indexOf(buffer, buffer.readerIndex(),
-                        buffer.writerIndex(), StompConstants.NULL);
+                            buffer.writerIndex(), StompConstants.NUL);
                     if (globalIndex != -1) {
                         contentLength = globalIndex - buffer.readerIndex();
                     }
@@ -204,16 +218,28 @@ public class StompDecoder extends ReplayingDecoder<State> {
         }
     }
 
+    private static long getContentLength(StompHeaders headers, long defaultValue) {
+        String contentLength = headers.get(StompHeaders.CONTENT_LENGTH);
+        if (contentLength != null) {
+            try {
+                return Long.parseLong(contentLength);
+            } catch (NumberFormatException ignored) {
+                return defaultValue;
+            }
+        }
+        return defaultValue;
+    }
+
     private static void skipNullCharacter(ByteBuf buffer) {
         byte b = buffer.readByte();
-        if (b != StompConstants.NULL) {
+        if (b != StompConstants.NUL) {
             throw new IllegalStateException("unexpected byte in buffer " + b + " while expecting NULL byte");
         }
     }
 
     private static void skipControlCharacters(ByteBuf buffer) {
         byte b;
-        while (true) {
+        for (;;) {
             b = buffer.readByte();
             if (b != StompConstants.CR && b != StompConstants.LF) {
                 buffer.readerIndex(buffer.readerIndex() - 1);
@@ -223,23 +249,23 @@ public class StompDecoder extends ReplayingDecoder<State> {
     }
 
     private static String readLine(ByteBuf buffer, int maxLineLength) {
-        StringBuilder sb = new StringBuilder();
+        AppendableCharSequence buf = new AppendableCharSequence(128);
         int lineLength = 0;
-        while (true) {
+        for (;;) {
             byte nextByte = buffer.readByte();
             if (nextByte == StompConstants.CR) {
                 nextByte = buffer.readByte();
                 if (nextByte == StompConstants.LF) {
-                    return sb.toString();
+                    return buf.toString();
                 }
             } else if (nextByte == StompConstants.LF) {
-                return sb.toString();
+                return buf.toString();
             } else {
                 if (lineLength >= maxLineLength) {
                     throw new TooLongFrameException("An STOMP line is larger than " + maxLineLength + " bytes.");
                 }
-                lineLength++;
+                lineLength ++;
-                sb.append((char) nextByte);
+                buf.append((char) nextByte);
             }
         }
     }
@@ -250,14 +276,4 @@ public class StompDecoder extends ReplayingDecoder<State> {
         alreadyReadChunkSize = 0;
         lastContent = null;
     }
-
-    enum State {
-        SKIP_CONTROL_CHARACTERS,
-        READ_HEADERS,
-        READ_CONTENT,
-        FINALIZE_FRAME_READ,
-        BAD_FRAME,
-        INVALID_CHUNK
-    }
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompSubframeEncoder.java

@@ -15,70 +15,64 @@
  */
 package io.netty.handler.codec.stomp;
 
-import java.util.Iterator;
-import java.util.List;
-
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToMessageEncoder;
 import io.netty.util.CharsetUtil;
 
+import java.util.List;
+
 /**
- * Encodes a {@link StompFrame} or a {@link FullStompFrame} or a {@link StompContent} into a {@link ByteBuf}.
+ * Encodes a {@link StompFrame} or a {@link StompSubframe} into a {@link ByteBuf}.
  */
-public class StompEncoder extends MessageToMessageEncoder<StompObject> {
+public class StompSubframeEncoder extends MessageToMessageEncoder<StompSubframe> {
 
     @Override
-    protected void encode(ChannelHandlerContext ctx, StompObject msg, List<Object> out) throws Exception {
+    protected void encode(ChannelHandlerContext ctx, StompSubframe msg, List<Object> out) throws Exception {
-        if (msg instanceof  FullStompFrame) {
+        if (msg instanceof StompFrame) {
-            FullStompFrame frame = (FullStompFrame) msg;
+            StompFrame frame = (StompFrame) msg;
             ByteBuf frameBuf = encodeFrame(frame, ctx);
             out.add(frameBuf);
             ByteBuf contentBuf = encodeContent(frame, ctx);
             out.add(contentBuf);
-        } else if (msg instanceof StompFrame) {
+        } else if (msg instanceof StompHeadersSubframe) {
-            StompFrame frame = (StompFrame) msg;
+            StompHeadersSubframe frame = (StompHeadersSubframe) msg;
             ByteBuf buf = encodeFrame(frame, ctx);
             out.add(buf);
-        } else if (msg instanceof StompContent) {
+        } else if (msg instanceof StompContentSubframe) {
-            StompContent stompContent = (StompContent) msg;
+            StompContentSubframe stompContentSubframe = (StompContentSubframe) msg;
-            ByteBuf buf = encodeContent(stompContent, ctx);
+            ByteBuf buf = encodeContent(stompContentSubframe, ctx);
             out.add(buf);
         }
     }
 
-    private ByteBuf encodeContent(StompContent content, ChannelHandlerContext ctx) {
+    private static ByteBuf encodeContent(StompContentSubframe content, ChannelHandlerContext ctx) {
-        if (content instanceof LastStompContent) {
+        if (content instanceof LastStompContentSubframe) {
             ByteBuf buf = ctx.alloc().buffer(content.content().readableBytes() + 1);
             buf.writeBytes(content.content());
-            buf.writeByte(StompConstants.NULL);
+            buf.writeByte(StompConstants.NUL);
             return buf;
         } else {
-            ByteBuf buf = ctx.alloc().buffer(content.content().readableBytes());
+            return content.content().retain();
-            buf.writeBytes(content.content());
-            return buf;
         }
     }
 
-    private ByteBuf encodeFrame(StompFrame frame, ChannelHandlerContext ctx) {
+    private static ByteBuf encodeFrame(StompHeadersSubframe frame, ChannelHandlerContext ctx) {
         ByteBuf buf = ctx.alloc().buffer();
 
         buf.writeBytes(frame.command().toString().getBytes(CharsetUtil.US_ASCII));
         buf.writeByte(StompConstants.CR).writeByte(StompConstants.LF);
 
         StompHeaders headers = frame.headers();
-        for (Iterator<String> iterator = headers.keySet().iterator(); iterator.hasNext();) {
+        for (String k: headers.keySet()) {
-            String key = iterator.next();
+            List<String> values = headers.getAll(k);
-            List<String> values = headers.getAll(key);
+            for (String v: values) {
-            for (Iterator<String> stringIterator = values.iterator(); stringIterator.hasNext();) {
+                buf.writeBytes(k.getBytes(CharsetUtil.US_ASCII)).
-                String value = stringIterator.next();
+                        writeByte(StompConstants.COLON).writeBytes(v.getBytes(CharsetUtil.US_ASCII));
-                buf.writeBytes(key.getBytes(CharsetUtil.US_ASCII)).
-                        writeByte(StompConstants.COLON).writeBytes(value.getBytes(CharsetUtil.US_ASCII));
                 buf.writeByte(StompConstants.CR).writeByte(StompConstants.LF);
             }
         }
         buf.writeByte(StompConstants.CR).writeByte(StompConstants.LF);
         return buf;
     }
-
 }

codec-stomp/src/main/java/io/netty/handler/codec/stomp/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 The Netty Project
+ * Copyright 2014 The Netty Project
  *
  * The Netty Project licenses this file to you under the Apache License,
  * version 2.0 (the "License"); you may not use this file except in compliance
@@ -15,6 +15,6 @@
  */
 
 /**
- * Common superset of ascii and binary classes.
+ * <a href="http://en.wikipedia.org/wiki/Streaming_Text_Oriented_Messaging_Protocol">STOMP</a> codec
  */
 package io.netty.handler.codec.stomp;

codec-stomp/src/test/java/io/netty/handler/codec/stomp/StompSubframeAggregatorTest.java

@@ -15,24 +15,23 @@
  */
 package io.netty.handler.codec.stomp;
 
-import io.netty.util.CharsetUtil;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.embedded.EmbeddedChannel;
 import io.netty.handler.codec.TooLongFrameException;
+import io.netty.util.CharsetUtil;
+import org.junit.After;
 import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
 
-public class StompAggregatorTest {
+public class StompSubframeAggregatorTest {
 
     private EmbeddedChannel channel;
 
     @Before
     public void setup() throws Exception {
-        channel = new EmbeddedChannel(new StompDecoder(), new StompAggregator(100000));
+        channel = new EmbeddedChannel(new StompSubframeDecoder(), new StompSubframeAggregator(100000));
     }
 
     @After
@@ -45,8 +44,8 @@ public class StompAggregatorTest {
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.CONNECT_FRAME.getBytes());
         channel.writeInbound(incoming);
-        StompFrame frame = channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertTrue(frame instanceof FullStompFrame);
+        Assert.assertTrue(frame instanceof StompFrame);
         Assert.assertNull(channel.readInbound());
     }
 
@@ -55,7 +54,7 @@ public class StompAggregatorTest {
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.SEND_FRAME_2.getBytes());
         channel.writeInbound(incoming);
-        FullStompFrame frame = channel.readInbound();
+        StompFrame frame = channel.readInbound();
         Assert.assertNotNull(frame);
         Assert.assertEquals(StompCommand.SEND, frame.command());
         Assert.assertEquals("hello, queue a!!!", frame.content().toString(CharsetUtil.UTF_8));
@@ -64,11 +63,12 @@ public class StompAggregatorTest {
 
     @Test
     public void testSingleFrameChunked() {
-        EmbeddedChannel channel = new EmbeddedChannel(new StompDecoder(10000, 5), new StompAggregator(100000));
+        EmbeddedChannel channel = new EmbeddedChannel(
+                new StompSubframeDecoder(10000, 5), new StompSubframeAggregator(100000));
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.SEND_FRAME_2.getBytes());
         channel.writeInbound(incoming);
-        FullStompFrame frame = channel.readInbound();
+        StompFrame frame = channel.readInbound();
         Assert.assertNotNull(frame);
         Assert.assertEquals(StompCommand.SEND, frame.command());
         Assert.assertNull(channel.readInbound());
@@ -81,7 +81,7 @@ public class StompAggregatorTest {
         incoming.writeBytes(StompTestConstants.CONNECTED_FRAME.getBytes());
         channel.writeInbound(incoming);
         channel.writeInbound(Unpooled.wrappedBuffer(StompTestConstants.SEND_FRAME_1.getBytes()));
-        FullStompFrame frame = channel.readInbound();
+        StompFrame frame = channel.readInbound();
         Assert.assertEquals(StompCommand.CONNECT, frame.command());
         frame = channel.readInbound();
         Assert.assertEquals(StompCommand.CONNECTED, frame.command());
@@ -92,8 +92,7 @@ public class StompAggregatorTest {
 
     @Test(expected = TooLongFrameException.class)
     public void testTooLongFrameException() {
-        EmbeddedChannel channel = new EmbeddedChannel(new StompDecoder(), new StompAggregator(10));
+        EmbeddedChannel channel = new EmbeddedChannel(new StompSubframeDecoder(), new StompSubframeAggregator(10));
         channel.writeInbound(Unpooled.wrappedBuffer(StompTestConstants.SEND_FRAME_1.getBytes()));
     }
-
 }

codec-stomp/src/test/java/io/netty/handler/codec/stomp/StompSubframeDecoderTest.java

@@ -15,28 +15,28 @@
  */
 package io.netty.handler.codec.stomp;
 
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.embedded.EmbeddedChannel;
 import io.netty.util.CharsetUtil;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import io.netty.buffer.ByteBuf;
+import static org.junit.Assert.*;
-import io.netty.buffer.Unpooled;
-import io.netty.channel.embedded.EmbeddedChannel;
-import org.junit.Assert;
 
-public class StompDecoderTest {
+public class StompSubframeDecoderTest {
 
     private EmbeddedChannel channel;
 
     @Before
     public void setup() throws Exception {
-        channel = new EmbeddedChannel(new StompDecoder());
+        channel = new EmbeddedChannel(new StompSubframeDecoder());
     }
 
     @After
     public void teardown() throws Exception {
-        Assert.assertFalse(channel.finish());
+        assertFalse(channel.finish());
     }
 
     @Test
@@ -44,13 +44,13 @@ public class StompDecoderTest {
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.CONNECT_FRAME.getBytes());
         channel.writeInbound(incoming);
-        StompFrame frame = channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertNotNull(frame);
+        assertNotNull(frame);
-        Assert.assertEquals(StompCommand.CONNECT, frame.command());
+        assertEquals(StompCommand.CONNECT, frame.command());
-        StompContent content = channel.readInbound();
+        StompContentSubframe content = channel.readInbound();
-        Assert.assertTrue(content == LastStompContent.EMPTY_LAST_CONTENT);
+        assertSame(content, LastStompContentSubframe.EMPTY_LAST_CONTENT);
         Object o = channel.readInbound();
-        Assert.assertNull(o);
+        assertNull(o);
     }
 
     @Test
@@ -58,14 +58,14 @@ public class StompDecoderTest {
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.SEND_FRAME_2.getBytes());
         channel.writeInbound(incoming);
-        StompFrame frame = channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertNotNull(frame);
+        assertNotNull(frame);
-        Assert.assertEquals(StompCommand.SEND, frame.command());
+        assertEquals(StompCommand.SEND, frame.command());
-        StompContent content = channel.readInbound();
+        StompContentSubframe content = channel.readInbound();
-        Assert.assertTrue(content instanceof LastStompContent);
+        assertTrue(content instanceof LastStompContentSubframe);
         String s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals("hello, queue a!!!", s);
+        assertEquals("hello, queue a!!!", s);
-        Assert.assertNull(channel.readInbound());
+        assertNull(channel.readInbound());
     }
 
     @Test
@@ -73,43 +73,43 @@ public class StompDecoderTest {
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.SEND_FRAME_1.getBytes());
         channel.writeInbound(incoming);
-        StompFrame frame = (StompFrame) channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertNotNull(frame);
+        assertNotNull(frame);
-        Assert.assertEquals(StompCommand.SEND, frame.command());
+        assertEquals(StompCommand.SEND, frame.command());
-        StompContent content = (StompContent) channel.readInbound();
+        StompContentSubframe content = channel.readInbound();
-        Assert.assertTrue(content instanceof LastStompContent);
+        assertTrue(content instanceof LastStompContentSubframe);
         String s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals("hello, queue a!", s);
+        assertEquals("hello, queue a!", s);
-        Assert.assertNull(channel.readInbound());
+        assertNull(channel.readInbound());
     }
 
     @Test
     public void testSingleFrameChunked() {
-        EmbeddedChannel channel = new EmbeddedChannel(new StompDecoder(10000, 5));
+        EmbeddedChannel channel = new EmbeddedChannel(new StompSubframeDecoder(10000, 5));
 
         ByteBuf incoming = Unpooled.buffer();
         incoming.writeBytes(StompTestConstants.SEND_FRAME_2.getBytes());
         channel.writeInbound(incoming);
-        StompFrame frame = channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertNotNull(frame);
+        assertNotNull(frame);
-        Assert.assertEquals(StompCommand.SEND, frame.command());
+        assertEquals(StompCommand.SEND, frame.command());
-        StompContent content = channel.readInbound();
+        StompContentSubframe content = channel.readInbound();
         String s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals("hello", s);
+        assertEquals("hello", s);
 
         content = channel.readInbound();
         s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals(", que", s);
+        assertEquals(", que", s);
 
         content = channel.readInbound();
         s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals("ue a!", s);
+        assertEquals("ue a!", s);
 
         content = channel.readInbound();
         s = content.content().toString(CharsetUtil.UTF_8);
-        Assert.assertEquals("!!", s);
+        assertEquals("!!", s);
 
-        Assert.assertNull(channel.readInbound());
+        assertNull(channel.readInbound());
     }
 
     @Test
@@ -119,17 +119,17 @@ public class StompDecoderTest {
         incoming.writeBytes(StompTestConstants.CONNECTED_FRAME.getBytes());
         channel.writeInbound(incoming);
 
-        StompFrame frame = channel.readInbound();
+        StompHeadersSubframe frame = channel.readInbound();
-        Assert.assertNotNull(frame);
+        assertNotNull(frame);
-        Assert.assertEquals(StompCommand.CONNECT, frame.command());
+        assertEquals(StompCommand.CONNECT, frame.command());
-        StompContent content = channel.readInbound();
+        StompContentSubframe content = channel.readInbound();
-        Assert.assertTrue(content == LastStompContent.EMPTY_LAST_CONTENT);
+        assertSame(content, LastStompContentSubframe.EMPTY_LAST_CONTENT);
 
-        StompFrame frame2 = channel.readInbound();
+        StompHeadersSubframe frame2 = channel.readInbound();
-        Assert.assertNotNull(frame2);
+        assertNotNull(frame2);
-        Assert.assertEquals(StompCommand.CONNECTED, frame2.command());
+        assertEquals(StompCommand.CONNECTED, frame2.command());
-        StompContent content2 = channel.readInbound();
+        StompContentSubframe content2 = channel.readInbound();
-        Assert.assertTrue(content2 == LastStompContent.EMPTY_LAST_CONTENT);
+        assertSame(content2, LastStompContentSubframe.EMPTY_LAST_CONTENT);
-        Assert.assertNull(channel.readInbound());
+        assertNull(channel.readInbound());
     }
 }

codec-stomp/src/test/java/io/netty/handler/codec/stomp/StompSubframeEncoderTest.java

@@ -15,49 +15,48 @@
  */
 package io.netty.handler.codec.stomp;
 
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.embedded.EmbeddedChannel;
 import io.netty.util.CharsetUtil;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import io.netty.buffer.ByteBuf;
+import static org.junit.Assert.*;
-import io.netty.buffer.Unpooled;
-import io.netty.channel.embedded.EmbeddedChannel;
-import org.junit.Assert;
 
-public class StompEncoderTest {
+public class StompSubframeEncoderTest {
 
     private EmbeddedChannel channel;
 
     @Before
     public void setup() throws Exception {
-        channel = new EmbeddedChannel(new StompEncoder());
+        channel = new EmbeddedChannel(new StompSubframeEncoder());
     }
 
     @After
     public void teardown() throws Exception {
-        Assert.assertFalse(channel.finish());
+        assertFalse(channel.finish());
     }
 
     @Test
     public void testFrameAndContentEncoding() {
-        StompFrame frame = new DefaultStompFrame(StompCommand.CONNECT);
+        StompHeadersSubframe frame = new DefaultStompHeadersSubframe(StompCommand.CONNECT);
         StompHeaders headers = frame.headers();
         headers.set(StompHeaders.ACCEPT_VERSION, "1.1,1.2");
         headers.set(StompHeaders.HOST, "stomp.github.org");
         channel.writeOutbound(frame);
-        channel.writeOutbound(LastStompContent.EMPTY_LAST_CONTENT);
+        channel.writeOutbound(LastStompContentSubframe.EMPTY_LAST_CONTENT);
         ByteBuf aggregatedBuffer = Unpooled.buffer();
         ByteBuf byteBuf = channel.readOutbound();
-        Assert.assertNotNull(byteBuf);
+        assertNotNull(byteBuf);
         aggregatedBuffer.writeBytes(byteBuf);
 
         byteBuf = channel.readOutbound();
-        Assert.assertNotNull(byteBuf);
+        assertNotNull(byteBuf);
         aggregatedBuffer.writeBytes(byteBuf);
         aggregatedBuffer.resetReaderIndex();
         String content = aggregatedBuffer.toString(CharsetUtil.UTF_8);
-        Assert.assertEquals(StompTestConstants.CONNECT_FRAME, content);
+        assertEquals(StompTestConstants.CONNECT_FRAME, content);
     }
-
 }

codec-stomp/src/test/java/io/netty/handler/codec/stomp/StompTestConstants.java

@@ -21,7 +21,7 @@ public final class StompTestConstants {
             "host:stomp.github.org\r\n" +
             "accept-version:1.1,1.2\r\n" +
             "\r\n" +
-            "\0";
+            '\0';
     public static final String CONNECTED_FRAME =
         "CONNECTED\r\n" +
             "version:1.2\n" +
@@ -43,6 +43,5 @@ public final class StompTestConstants {
             "hello, queue a!!!" +
             "\0\n";
 
-    private StompTestConstants() {
+    private StompTestConstants() { }
-    }
 }

example/src/main/java/io/netty/example/stomp/StompClient.java

@@ -16,148 +16,49 @@
 package io.netty.example.stomp;
 
 import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.Channel;
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.ChannelPipeline;
 import io.netty.channel.EventLoopGroup;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.SocketChannel;
 import io.netty.channel.socket.nio.NioSocketChannel;
-import io.netty.handler.codec.stomp.FullStompFrame;
+import io.netty.handler.codec.stomp.StompSubframeAggregator;
-import io.netty.handler.codec.stomp.DefaultFullStompFrame;
+import io.netty.handler.codec.stomp.StompSubframeDecoder;
-import io.netty.handler.codec.stomp.StompCommand;
+import io.netty.handler.codec.stomp.StompSubframeEncoder;
-import io.netty.handler.codec.stomp.StompHeaders;
-import io.netty.handler.codec.stomp.StompEncoder;
-import io.netty.handler.codec.stomp.StompDecoder;
-import io.netty.handler.codec.stomp.StompAggregator;
 
 
 /**
  * very simple stomp client implementation example, requires running stomp server to actually work
  * uses default username/password and destination values from hornetq message broker
  */
-public class StompClient implements  StompFrameListener {
+public final class StompClient {
-    public static final String DEAFULT_HOST = "localhost";
-    public static final int DEFAULT_PORT = 61613;
-    public static final String DEFAULT_USERNAME = "guest";
-    public static final String DEFAULT_PASSWORD = "guest";
-    private static final String EXAMPLE_TOPIC = "jms.topic.exampleTopic";
 
-    private final String host;
+    static final boolean SSL = System.getProperty("ssl") != null;
-    private final int port;
+    static final String HOST = System.getProperty("host", "127.0.0.1");
-    private final String username;
+    static final int PORT = Integer.parseInt(System.getProperty("port", "61613"));
-    private final String password;
+    static final String LOGIN = System.getProperty("login", "guest");
-    private ClientState state = ClientState.CONNECTING;
+    static final String PASSCODE = System.getProperty("passcode", "guest");
-    private Channel ch;
+    static final String TOPIC = System.getProperty("topic", "jms.topic.exampleTopic");
 
     public static void main(String[] args) throws Exception {
-        String host;
-        int port;
-        String username;
-        String password;
-        if (args.length == 0) {
-            host = DEAFULT_HOST;
-            port = DEFAULT_PORT;
-            username = DEFAULT_USERNAME;
-            password = DEFAULT_PASSWORD;
-        } else if (args.length == 4) {
-            host = args[0];
-            port = Integer.parseInt(args[1]);
-            username = args[2];
-            password = args[3];
-        } else {
-            System.err.println("Usage: " + StompClient.class.getSimpleName() + " <host> <port> <username> <password>");
-            return;
-        }
-        StompClient stompClient = new StompClient(host, port, username, password);
-        stompClient.run();
-    }
-
-    public StompClient(String host, int port, String username, String password) {
-        this.host = host;
-        this.port = port;
-        this.username = username;
-        this.password = password;
-    }
-
-    public void run() throws Exception {
         EventLoopGroup group = new NioEventLoopGroup();
-        Bootstrap b = new Bootstrap();
-        final StompClient that = this;
-        b.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
-            protected void initChannel(SocketChannel ch) throws Exception {
-                ChannelPipeline pipeline = ch.pipeline();
-                pipeline.addLast("decoder", new StompDecoder());
-                pipeline.addLast("encoder", new StompEncoder());
-                pipeline.addLast("aggregator", new StompAggregator(1048576));
-                pipeline.addLast("handler", new StompClientHandler(that));
-            }
-        });
-        b.remoteAddress(host, port);
-
-        this.ch = b.connect().sync().channel();
-
-        FullStompFrame connFrame = new DefaultFullStompFrame(StompCommand.CONNECT);
-        connFrame.headers().set(StompHeaders.ACCEPT_VERSION, "1.2");
-        connFrame.headers().set(StompHeaders.HOST, host);
-        connFrame.headers().set(StompHeaders.LOGIN, username);
-        connFrame.headers().set(StompHeaders.PASSCODE, password);
-        ch.writeAndFlush(connFrame).sync();
-    }
-
-    @Override
-    public void onFrame(FullStompFrame frame) {
-        String subscrReceiptId = "001";
-        String disconReceiptId = "002";
         try {
-            switch (frame.command()) {
+            Bootstrap b = new Bootstrap();
-                case CONNECTED:
+            b.group(group).channel(NioSocketChannel.class);
-                    FullStompFrame subscribeFrame = new DefaultFullStompFrame(StompCommand.SUBSCRIBE);
+            b.handler(new ChannelInitializer<SocketChannel>() {
-                    subscribeFrame.headers().set(StompHeaders.DESTINATION, EXAMPLE_TOPIC);
+                @Override
-                    subscribeFrame.headers().set(StompHeaders.RECEIPT, subscrReceiptId);
+                protected void initChannel(SocketChannel ch) throws Exception {
-                    subscribeFrame.headers().set(StompHeaders.ID, "1");
+                    ChannelPipeline pipeline = ch.pipeline();
-                    System.out.println("connected, sending subscribe frame: " + subscribeFrame);
+                    pipeline.addLast("decoder", new StompSubframeDecoder());
-                    state = ClientState.CONNECTED;
+                    pipeline.addLast("encoder", new StompSubframeEncoder());
-                    ch.writeAndFlush(subscribeFrame);
+                    pipeline.addLast("aggregator", new StompSubframeAggregator(1048576));
-                    break;
+                    pipeline.addLast("handler", new StompClientHandler());
-                case RECEIPT:
+                }
-                    String receiptHeader = frame.headers().get(StompHeaders.RECEIPT_ID);
+            });
-                    if (state == ClientState.CONNECTED && receiptHeader.equals(subscrReceiptId)) {
-                        FullStompFrame msgFrame = new DefaultFullStompFrame(StompCommand.SEND);
-                        msgFrame.headers().set(StompHeaders.DESTINATION, EXAMPLE_TOPIC);
-                        msgFrame.content().writeBytes("some payload".getBytes());
-                        System.out.println("subscribed, sending message frame: " + msgFrame);
-                        state = ClientState.SUBSCRIBED;
-                        ch.writeAndFlush(msgFrame);
-                    } else if (state == ClientState.DISCONNECTING && receiptHeader.equals(disconReceiptId)) {
-                        System.out.println("disconnected, exiting..");
-                        System.exit(0);
-                    } else {
-                        throw new IllegalStateException("received: " + frame + ", while internal state is " + state);
-                    }
-                    break;
-                case MESSAGE:
-                    if (state == ClientState.SUBSCRIBED) {
-                        System.out.println("received frame: " + frame);
-                        FullStompFrame disconnFrame = new DefaultFullStompFrame(StompCommand.DISCONNECT);
-                        disconnFrame.headers().set(StompHeaders.RECEIPT, disconReceiptId);
-                        System.out.println("sending disconnect frame: " + disconnFrame);
-                        state = ClientState.DISCONNECTING;
-                        ch.writeAndFlush(disconnFrame);
-                    }
-                    break;
-                default:
-                    break;
-            }
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-    }
 
-    enum ClientState {
+            b.connect(HOST, PORT).sync().channel().closeFuture().sync();
-        CONNECTING,
+        } finally {
-        CONNECTED,
+            group.shutdownGracefully();
-        SUBSCRIBED,
+        }
-        DISCONNECTING
     }
 }

example/src/main/java/io/netty/example/stomp/StompClientHandler.java

@@ -17,23 +17,84 @@ package io.netty.example.stomp;
 
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
-import io.netty.handler.codec.stomp.FullStompFrame;
+import io.netty.handler.codec.stomp.DefaultStompFrame;
+import io.netty.handler.codec.stomp.StompCommand;
+import io.netty.handler.codec.stomp.StompFrame;
+import io.netty.handler.codec.stomp.StompHeaders;
 
 /**
  * STOMP client inbound handler implementation, which just passes received messages to listener
  */
-public class StompClientHandler extends SimpleChannelInboundHandler<FullStompFrame> {
+public class StompClientHandler extends SimpleChannelInboundHandler<StompFrame> {
-    private final StompFrameListener listener;
 
-    public StompClientHandler(StompFrameListener listener) {
+    private enum ClientState {
-        if (listener == null) {
+        AUTHENTICATING,
-            throw new NullPointerException("listener");
+        AUTHENTICATED,
-        }
+        SUBSCRIBED,
-        this.listener = listener;
+        DISCONNECTING
+    }
+
+    private ClientState state;
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        state = ClientState.AUTHENTICATING;
+        StompFrame connFrame = new DefaultStompFrame(StompCommand.CONNECT);
+        connFrame.headers().set(StompHeaders.ACCEPT_VERSION, "1.2");
+        connFrame.headers().set(StompHeaders.HOST, StompClient.HOST);
+        connFrame.headers().set(StompHeaders.LOGIN, StompClient.LOGIN);
+        connFrame.headers().set(StompHeaders.PASSCODE, StompClient.PASSCODE);
+        ctx.writeAndFlush(connFrame);
     }
 
     @Override
-    protected void messageReceived(ChannelHandlerContext ctx, FullStompFrame msg) throws Exception {
+    protected void messageReceived(ChannelHandlerContext ctx, StompFrame frame) throws Exception {
-        listener.onFrame(msg);
+        String subscrReceiptId = "001";
+        String disconReceiptId = "002";
+        switch (frame.command()) {
+            case CONNECTED:
+                StompFrame subscribeFrame = new DefaultStompFrame(StompCommand.SUBSCRIBE);
+                subscribeFrame.headers().set(StompHeaders.DESTINATION, StompClient.TOPIC);
+                subscribeFrame.headers().set(StompHeaders.RECEIPT, subscrReceiptId);
+                subscribeFrame.headers().set(StompHeaders.ID, "1");
+                System.out.println("connected, sending subscribe frame: " + subscribeFrame);
+                state = ClientState.AUTHENTICATED;
+                ctx.writeAndFlush(subscribeFrame);
+                break;
+            case RECEIPT:
+                String receiptHeader = frame.headers().get(StompHeaders.RECEIPT_ID);
+                if (state == ClientState.AUTHENTICATED && receiptHeader.equals(subscrReceiptId)) {
+                    StompFrame msgFrame = new DefaultStompFrame(StompCommand.SEND);
+                    msgFrame.headers().set(StompHeaders.DESTINATION, StompClient.TOPIC);
+                    msgFrame.content().writeBytes("some payload".getBytes());
+                    System.out.println("subscribed, sending message frame: " + msgFrame);
+                    state = ClientState.SUBSCRIBED;
+                    ctx.writeAndFlush(msgFrame);
+                } else if (state == ClientState.DISCONNECTING && receiptHeader.equals(disconReceiptId)) {
+                    System.out.println("disconnected");
+                    ctx.close();
+                } else {
+                    throw new IllegalStateException("received: " + frame + ", while internal state is " + state);
+                }
+                break;
+            case MESSAGE:
+                if (state == ClientState.SUBSCRIBED) {
+                    System.out.println("received frame: " + frame);
+                    StompFrame disconnFrame = new DefaultStompFrame(StompCommand.DISCONNECT);
+                    disconnFrame.headers().set(StompHeaders.RECEIPT, disconReceiptId);
+                    System.out.println("sending disconnect frame: " + disconnFrame);
+                    state = ClientState.DISCONNECTING;
+                    ctx.writeAndFlush(disconnFrame);
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        cause.printStackTrace();
+        ctx.close();
     }
 }

run-example.sh

@@ -31,6 +31,7 @@ EXAMPLE_MAP=(
   'proxy-server:io.netty.example.proxy.HexDumpProxy'
   'socksproxy-server:io.netty.example.socksproxy.SocksServer'
   'memcache-binary-client:io.netty.example.memcache.binary.MemcacheClient'
+  'stomp-client:io.netty.example.stomp.StompClient'
   'uptime-client:io.netty.example.uptime.UptimeClient'
   'sctpecho-client:io.netty.example.sctp.SctpEchoClient'
   'sctpecho-server:io.netty.example.sctp.SctpEchoServer'