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Explode ComponentProcessor into its contained interfaces

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This commit is contained in:
Chris Vest 2021-02-12 18:28:05 +01:00
parent eef97dd1fd
commit 5434fa88b4
8 changed files with 223 additions and 185 deletions
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5
src/main/java/io/netty/buffer/api/Buffer.java
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@ -15,11 +15,6 @@
*/
package io.netty.buffer.api;
import io.netty.buffer.api.ComponentProcessor.ReadableComponentProcessor;
import io.netty.buffer.api.ComponentProcessor.WritableComponentProcessor;
import io.netty.buffer.api.ComponentProcessor.ReadableComponent;
import io.netty.buffer.api.ComponentProcessor.WritableComponent;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

173
src/main/java/io/netty/buffer/api/ComponentProcessor.java
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@ -1,173 +0,0 @@
/*
* Copyright 2020 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:
*
* https://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.buffer.api;
import java.nio.ByteBuffer;
/**
* This interface contain a collection of APIs used in the
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)} and
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)} methods.
*/
public interface ComponentProcessor {
/**
* A processor of {@linkplain ReadableComponent readable components}.
*/
@FunctionalInterface
interface ReadableComponentProcessor<E extends Exception> extends ComponentProcessor {
/**
* Process the given component at the given index in the
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor) iteration}.
* <p>
* The component object itself is only valid during this call, but the {@link ByteBuffer byte buffers}, arrays,
* and native address pointers obtained from it, will be valid until any
* {@link Buffer#isOwned() ownership} requiring operation is performed on the buffer.
*
* @param index The current index of the given buffer component, based on the initial index passed to the
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)} method.
* @param component The current buffer component being processed.
* @return {@code true} if the iteration should continue and more components should be processed, otherwise
* {@code false} to stop the iteration early.
*/
boolean process(int index, ReadableComponent component) throws E;
}
/**
* A processor of {@linkplain WritableComponent writable components}.
*/
@FunctionalInterface
interface WritableComponentProcessor<E extends Exception> extends ComponentProcessor {
/**
* Process the given component at the given index in the
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)} iteration}.
* <p>
* The component object itself is only valid during this call, but the {@link ByteBuffer byte buffers}, arrays,
* and native address pointers obtained from it, will be valid until any
* {@link Buffer#isOwned() ownership} requiring operation is performed on the buffer.
*
* @param index The current index of the given buffer component, based on the initial index passed to the
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)} method.
* @param component The current buffer component being processed.
* @return {@code true} if the iteration should continue and more components should be processed, otherwise
* {@code false} to stop the iteration early.
*/
boolean process(int index, WritableComponent component) throws E;
}
/**
* A view onto the buffer component being processed in a given iteration of
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)}.
*/
interface ReadableComponent {
/**
* Check if this component is backed by a cached byte array than can be accessed cheaply.
* <p>
* <strong>Note</strong> that regardless of what this method returns, the array should not be used to modify the
* contents of this buffer component.
*
* @return {@code true} if {@link #readableArray()} is a cheap operation, otherwise {@code false}.
*/
boolean hasReadableArray();
/**
* Get a byte array of the contents of this component.
* <p>
* <strong>Note</strong> that the array is meant to be read-only. It may either be a direct reference to the
* concrete array instance that is backing this component, or it is a fresh copy.
* Writing to the array may produce undefined behaviour.
*
* @return A byte array of the contents of this component.
* @throws UnsupportedOperationException if {@link #hasReadableArray()} returns {@code false}.
*/
byte[] readableArray();
/**
* An offset into the {@link #readableArray()} where this component starts.
*
* @return An offset into {@link #readableArray()}.
* @throws UnsupportedOperationException if {@link #hasReadableArray()} returns {@code false}.
*/
int readableArrayOffset();
/**
* Give the native memory address backing this buffer, or return 0 if this buffer has no native memory address.
* <p>
* <strong>Note</strong> that the address should not be used for writing to the buffer memory, and doing so may
* produce undefined behaviour.
*
* @return The native memory address, if any, otherwise 0.
*/
long readableNativeAddress();
/**
* Get a {@link ByteBuffer} instance for this memory component.
* <p>
* <strong>Note</strong> that the {@link ByteBuffer} is read-only, to prevent write accesses to the memory,
* when the buffer component is obtained through
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)}.
*
* @return A new {@link ByteBuffer}, with its own position and limit, for this memory component.
*/
ByteBuffer readableBuffer();
// todo for Unsafe-based impl, DBB.attachment needs to keep underlying memory alive
}
/**
* A view onto the buffer component being processed in a given iteration of
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)}.
*/
interface WritableComponent {
/**
* Check if this component is backed by a cached byte array than can be accessed cheaply.
*
* @return {@code true} if {@link #writableArray()} is a cheap operation, otherwise {@code false}.
*/
boolean hasWritableArray();
/**
* Get a byte array of the contents of this component.
*
* @return A byte array of the contents of this component.
* @throws UnsupportedOperationException if {@link #hasWritableArray()} returns {@code false}.
*/
byte[] writableArray();
/**
* An offset into the {@link #writableArray()} where this component starts.
*
* @return An offset into {@link #writableArray()}.
* @throws UnsupportedOperationException if {@link #hasWritableArray()} returns {@code false}.
*/
int writableArrayOffset();
/**
* Give the native memory address backing this buffer, or return 0 if this buffer has no native memory address.
*
* @return The native memory address, if any, otherwise 0.
*/
long writableNativeAddress();
/**
* Get a {@link ByteBuffer} instance for this memory component, which can be used for modifying the buffer
* contents.
*
* @return A new {@link ByteBuffer}, with its own position and limit, for this memory component.
*/
ByteBuffer writableBuffer();
}
}

3
src/main/java/io/netty/buffer/api/CompositeBuffer.java
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@ -15,9 +15,6 @@
*/
package io.netty.buffer.api;
import io.netty.buffer.api.ComponentProcessor.ReadableComponentProcessor;
import io.netty.buffer.api.ComponentProcessor.WritableComponentProcessor;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;

76
src/main/java/io/netty/buffer/api/ReadableComponent.java Normal file
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@ -0,0 +1,76 @@
/*
* Copyright 2020 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:
*
* https://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.buffer.api;
import java.nio.ByteBuffer;
/**
* A view onto the buffer component being processed in a given iteration of
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)}.
*/
public interface ReadableComponent {
/**
* Check if this component is backed by a cached byte array than can be accessed cheaply.
* <p>
* <strong>Note</strong> that regardless of what this method returns, the array should not be used to modify the
* contents of this buffer component.
*
* @return {@code true} if {@link #readableArray()} is a cheap operation, otherwise {@code false}.
*/
boolean hasReadableArray();
/**
* Get a byte array of the contents of this component.
* <p>
* <strong>Note</strong> that the array is meant to be read-only. It may either be a direct reference to the
* concrete array instance that is backing this component, or it is a fresh copy. Writing to the array may produce
* undefined behaviour.
*
* @return A byte array of the contents of this component.
* @throws UnsupportedOperationException if {@link #hasReadableArray()} returns {@code false}.
*/
byte[] readableArray();
/**
* An offset into the {@link #readableArray()} where this component starts.
*
* @return An offset into {@link #readableArray()}.
* @throws UnsupportedOperationException if {@link #hasReadableArray()} returns {@code false}.
*/
int readableArrayOffset();
/**
* Give the native memory address backing this buffer, or return 0 if this buffer has no native memory address.
* <p>
* <strong>Note</strong> that the address should not be used for writing to the buffer memory, and doing so may
* produce undefined behaviour.
*
* @return The native memory address, if any, otherwise 0.
*/
long readableNativeAddress();
/**
* Get a {@link ByteBuffer} instance for this memory component.
* <p>
* <strong>Note</strong> that the {@link ByteBuffer} is read-only, to prevent write accesses to the memory,
* when the buffer component is obtained through {@link Buffer#forEachReadable(int, ReadableComponentProcessor)}.
*
* @return A new {@link ByteBuffer}, with its own position and limit, for this memory component.
*/
ByteBuffer readableBuffer();
// todo for Unsafe-based impl, DBB.attachment needs to keep underlying memory alive
}

40
src/main/java/io/netty/buffer/api/ReadableComponentProcessor.java Normal file
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@ -0,0 +1,40 @@
/*
* Copyright 2020 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:
*
* https://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.buffer.api;
import java.nio.ByteBuffer;
/**
* A processor of {@linkplain ReadableComponent readable components}.
*/
@FunctionalInterface
public interface ReadableComponentProcessor<E extends Exception> {
/**
* Process the given component at the given index in the
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor) iteration}.
* <p>
* The component object itself is only valid during this call, but the {@link ByteBuffer byte buffers}, arrays, and
* native address pointers obtained from it, will be valid until any {@link Buffer#isOwned() ownership} requiring
* operation is performed on the buffer.
*
* @param index The current index of the given buffer component, based on the initial index passed to the
* {@link Buffer#forEachReadable(int, ReadableComponentProcessor)} method.
* @param component The current buffer component being processed.
* @return {@code true} if the iteration should continue and more components should be processed, otherwise
* {@code false} to stop the iteration early.
*/
boolean process(int index, ReadableComponent component) throws E;
}

63
src/main/java/io/netty/buffer/api/WritableComponent.java Normal file
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@ -0,0 +1,63 @@
/*
* Copyright 2020 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:
*
* https://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.buffer.api;
import java.nio.ByteBuffer;
/**
* A view onto the buffer component being processed in a given iteration of
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)}.
*/
public interface WritableComponent {
/**
* Check if this component is backed by a cached byte array than can be accessed cheaply.
*
* @return {@code true} if {@link #writableArray()} is a cheap operation, otherwise {@code false}.
*/
boolean hasWritableArray();
/**
* Get a byte array of the contents of this component.
*
* @return A byte array of the contents of this component.
* @throws UnsupportedOperationException if {@link #hasWritableArray()} returns {@code false}.
*/
byte[] writableArray();
/**
* An offset into the {@link #writableArray()} where this component starts.
*
* @return An offset into {@link #writableArray()}.
* @throws UnsupportedOperationException if {@link #hasWritableArray()} returns {@code false}.
*/
int writableArrayOffset();
/**
* Give the native memory address backing this buffer, or return 0 if this buffer has no native memory address.
*
* @return The native memory address, if any, otherwise 0.
*/
long writableNativeAddress();
/**
* Get a {@link ByteBuffer} instance for this memory component, which can be used for modifying the buffer
* contents.
*
* @return A new {@link ByteBuffer}, with its own position and limit, for this memory component.
*/
ByteBuffer writableBuffer();
}

40
src/main/java/io/netty/buffer/api/WritableComponentProcessor.java Normal file
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@ -0,0 +1,40 @@
/*
* Copyright 2020 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:
*
* https://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.buffer.api;
import java.nio.ByteBuffer;
/**
* A processor of {@linkplain WritableComponent writable components}.
*/
@FunctionalInterface
public interface WritableComponentProcessor<E extends Exception> {
/**
* Process the given component at the given index in the
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)} iteration}.
* <p>
* The component object itself is only valid during this call, but the {@link ByteBuffer byte buffers}, arrays, and
* native address pointers obtained from it, will be valid until any {@link Buffer#isOwned() ownership} requiring
* operation is performed on the buffer.
*
* @param index The current index of the given buffer component, based on the initial index passed to the
* {@link Buffer#forEachWritable(int, WritableComponentProcessor)} method.
* @param component The current buffer component being processed.
* @return {@code true} if the iteration should continue and more components should be processed, otherwise
* {@code false} to stop the iteration early.
*/
boolean process(int index, WritableComponent component) throws E;
}

8
src/main/java/io/netty/buffer/api/memseg/MemSegBuffer.java
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@ -19,10 +19,10 @@ import io.netty.buffer.api.BufferAllocator;
import io.netty.buffer.api.AllocatorControl;
import io.netty.buffer.api.Buffer;
import io.netty.buffer.api.ByteCursor;
import io.netty.buffer.api.ComponentProcessor.ReadableComponent;
import io.netty.buffer.api.ComponentProcessor.ReadableComponentProcessor;
import io.netty.buffer.api.ComponentProcessor.WritableComponent;
import io.netty.buffer.api.ComponentProcessor.WritableComponentProcessor;
import io.netty.buffer.api.ReadableComponent;
import io.netty.buffer.api.ReadableComponentProcessor;
import io.netty.buffer.api.WritableComponent;
import io.netty.buffer.api.WritableComponentProcessor;
import io.netty.buffer.api.Drop;
import io.netty.buffer.api.Owned;
import io.netty.buffer.api.RcSupport;