Fix #153: Add ChannelFuture.rethrowIfFailed()
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@ -261,6 +261,12 @@ public interface ChannelFuture {
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*/
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void removeListener(ChannelFutureListener listener);
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/**
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* Rethrows the exception that caused this future fail if this future is
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* complete and failed.
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*/
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ChannelFuture rethrowIfFailed() throws Exception;
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/**
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* Waits for this future to be completed.
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*
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@ -168,6 +168,27 @@ public class DefaultChannelFuture implements ChannelFuture {
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}
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}
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public ChannelFuture rethrowIfFailed() throws Exception {
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if (!isDone()) {
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return this;
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}
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Throwable cause = getCause();
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if (cause == null) {
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return this;
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}
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if (cause instanceof Exception) {
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throw (Exception) cause;
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}
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if (cause instanceof Error) {
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throw (Error) cause;
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}
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throw new RuntimeException(cause);
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}
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public ChannelFuture await() throws InterruptedException {
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if (Thread.interrupted()) {
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throw new InterruptedException();
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@ -45,4 +45,16 @@ public class FailedChannelFuture extends CompleteChannelFuture {
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public boolean isSuccess() {
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return false;
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}
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public ChannelFuture rethrowIfFailed() throws Exception {
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if (cause instanceof Exception) {
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throw (Exception) cause;
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}
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if (cause instanceof Error) {
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throw (Error) cause;
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}
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throw new RuntimeException(cause);
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}
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}
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@ -38,4 +38,8 @@ public class SucceededChannelFuture extends CompleteChannelFuture {
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public boolean isSuccess() {
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return true;
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}
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public ChannelFuture rethrowIfFailed() throws Exception {
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return this;
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}
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}
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@ -23,7 +23,6 @@ package org.jboss.netty.example.http.websocketx.client;
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import java.net.InetSocketAddress;
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import java.net.URI;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.concurrent.Executors;
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@ -39,11 +38,9 @@ import org.jboss.netty.handler.codec.http.HttpRequestEncoder;
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import org.jboss.netty.handler.codec.http.HttpResponseDecoder;
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import org.jboss.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
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import org.jboss.netty.handler.codec.http.websocketx.PingWebSocketFrame;
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import org.jboss.netty.handler.codec.http.websocketx.PongWebSocketFrame;
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import org.jboss.netty.handler.codec.http.websocketx.TextWebSocketFrame;
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import org.jboss.netty.handler.codec.http.websocketx.WebSocketClientHandshaker;
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import org.jboss.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
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import org.jboss.netty.handler.codec.http.websocketx.WebSocketFrame;
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import org.jboss.netty.handler.codec.http.websocketx.WebSocketVersion;
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public class WebSocketClient {
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@ -61,70 +58,72 @@ public class WebSocketClient {
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Executors.newCachedThreadPool(),
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Executors.newCachedThreadPool()));
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String protocol = uri.getScheme();
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if (!protocol.equals("ws")) {
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throw new IllegalArgumentException("Unsupported protocol: " + protocol);
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}
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HashMap<String, String> customHeaders = new HashMap<String, String>();
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customHeaders.put("MyHeader", "MyValue");
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// Connect with V13 (RFC 6455). You can change it to V08 or V00.
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// If you change it to V00, ping is not supported and remember to change
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// HttpResponseDecoder to WebSocketHttpResponseDecoder in the pipeline.
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final WebSocketClientHandshaker handshaker =
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new WebSocketClientHandshakerFactory().newHandshaker(
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uri, WebSocketVersion.V13, null, false, customHeaders);
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Channel ch = null;
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bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
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public ChannelPipeline getPipeline() throws Exception {
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ChannelPipeline pipeline = Channels.pipeline();
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// If you wish to support HyBi V00, you need to use
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// WebSocketHttpResponseDecoder instead for
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// HttpResponseDecoder.
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pipeline.addLast("decoder", new HttpResponseDecoder());
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pipeline.addLast("encoder", new HttpRequestEncoder());
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pipeline.addLast("ws-handler", new WebSocketClientHandler(handshaker));
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return pipeline;
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try {
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String protocol = uri.getScheme();
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if (!protocol.equals("ws")) {
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throw new IllegalArgumentException("Unsupported protocol: " + protocol);
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}
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});
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// Connect
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System.out.println("WebSocket Client connecting");
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ChannelFuture future =
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bootstrap.connect(
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new InetSocketAddress(uri.getHost(), uri.getPort()));
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future.awaitUninterruptibly();
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Channel ch = future.getChannel();
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handshaker.handshake(ch);
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Thread.sleep(1000);
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// Send 10 messages and wait for responses
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System.out.println("WebSocket Client sending message");
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for (int i = 0; i < 10; i++) {
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ch.write(new TextWebSocketFrame("Message #" + i));
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HashMap<String, String> customHeaders = new HashMap<String, String>();
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customHeaders.put("MyHeader", "MyValue");
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// Connect with V13 (RFC 6455). You can change it to V08 or V00.
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// If you change it to V00, ping is not supported and remember to change
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// HttpResponseDecoder to WebSocketHttpResponseDecoder in the pipeline.
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final WebSocketClientHandshaker handshaker =
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new WebSocketClientHandshakerFactory().newHandshaker(
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uri, WebSocketVersion.V13, null, false, customHeaders);
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bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
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public ChannelPipeline getPipeline() throws Exception {
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ChannelPipeline pipeline = Channels.pipeline();
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// If you wish to support HyBi V00, you need to use
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// WebSocketHttpResponseDecoder instead for
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// HttpResponseDecoder.
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pipeline.addLast("decoder", new HttpResponseDecoder());
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pipeline.addLast("encoder", new HttpRequestEncoder());
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pipeline.addLast("ws-handler", new WebSocketClientHandler(handshaker));
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return pipeline;
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}
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});
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// Connect
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System.out.println("WebSocket Client connecting");
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ChannelFuture future =
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bootstrap.connect(
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new InetSocketAddress(uri.getHost(), uri.getPort()));
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future.awaitUninterruptibly().rethrowIfFailed();
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ch = future.getChannel();
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handshaker.handshake(ch).awaitUninterruptibly().rethrowIfFailed();
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// Send 10 messages and wait for responses
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System.out.println("WebSocket Client sending message");
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for (int i = 0; i < 10; i++) {
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ch.write(new TextWebSocketFrame("Message #" + i));
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}
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// Ping
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System.out.println("WebSocket Client sending ping");
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ch.write(new PingWebSocketFrame(ChannelBuffers.copiedBuffer(new byte[]{1, 2, 3, 4, 5, 6})));
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// Close
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System.out.println("WebSocket Client sending close");
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ch.write(new CloseWebSocketFrame());
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// WebSocketClientHandler will close the connection when the server
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// responds to the CloseWebSocketFrame.
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ch.getCloseFuture().awaitUninterruptibly();
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} finally {
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if (ch != null) {
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ch.close();
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}
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bootstrap.releaseExternalResources();
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}
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Thread.sleep(1000);
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// Ping
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System.out.println("WebSocket Client sending ping");
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ch.write(new PingWebSocketFrame(ChannelBuffers.copiedBuffer(new byte[] { 1, 2, 3, 4, 5, 6 })));
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Thread.sleep(1000);
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// Close
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System.out.println("WebSocket Client sending close");
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ch.write(new CloseWebSocketFrame());
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// WebSocketClientHandler will close the connection when the server
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// responds to the CloseWebSocketFrame.
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ch.getCloseFuture().awaitUninterruptibly();
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bootstrap.releaseExternalResources();
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}
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public static void main(String[] args) throws Exception {
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@ -96,6 +96,10 @@ public class CompleteChannelFutureTest {
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public boolean isSuccess() {
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throw new Error();
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}
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public ChannelFuture rethrowIfFailed() throws Exception {
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throw new Error();
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}
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}
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private static class ExpectedError extends Error {
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