Java example source code file (UnpooledByteBufAllocator.java)

This example Java source code file (UnpooledByteBufAllocator.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractbytebufallocator, bytebuf, compositebytebuf, default, override, unpooledbytebufallocator, unpooleddirectbytebuf, unpooledheapbytebuf, unpooledunsafeheapbytebuf

The UnpooledByteBufAllocator.java Java example source code

/*
 * Copyright 2012 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.buffer;

import io.netty.util.internal.PlatformDependent;

/**
 * Simplistic {@link ByteBufAllocator} implementation that does not pool anything.
 */
public final class UnpooledByteBufAllocator extends AbstractByteBufAllocator {

    private final boolean disableLeakDetector;

    /**
     * Default instance which uses leak-detection for direct buffers.
     */
    public static final UnpooledByteBufAllocator DEFAULT =
            new UnpooledByteBufAllocator(PlatformDependent.directBufferPreferred());

    /**
     * Create a new instance which uses leak-detection for direct buffers.
     *
     * @param preferDirect {@code true} if {@link #buffer(int)} should try to allocate a direct buffer rather than
     *                     a heap buffer
     */
    public UnpooledByteBufAllocator(boolean preferDirect) {
        this(preferDirect, false);
    }

    /**
     * Create a new instance
     *
     * @param preferDirect {@code true} if {@link #buffer(int)} should try to allocate a direct buffer rather than
     *                     a heap buffer
     * @param disableLeakDetector {@code true} if the leak-detection should be disabled completely for this
     *                            allocator. This can be useful if the user just want to depend on the GC to handle
     *                            direct buffers when not explicit released.
     */
    public UnpooledByteBufAllocator(boolean preferDirect, boolean disableLeakDetector) {
        super(preferDirect);
        this.disableLeakDetector = disableLeakDetector;
    }

    @Override
    protected ByteBuf newHeapBuffer(int initialCapacity, int maxCapacity) {
        return PlatformDependent.hasUnsafe() ? new UnpooledUnsafeHeapByteBuf(this, initialCapacity, maxCapacity)
                : new UnpooledHeapByteBuf(this, initialCapacity, maxCapacity);
    }

    @Override
    protected ByteBuf newDirectBuffer(int initialCapacity, int maxCapacity) {
        ByteBuf buf = PlatformDependent.hasUnsafe() ?
                UnsafeByteBufUtil.newUnsafeDirectByteBuf(this, initialCapacity, maxCapacity) :
                new UnpooledDirectByteBuf(this, initialCapacity, maxCapacity);

        return disableLeakDetector ? buf : toLeakAwareBuffer(buf);
    }

    @Override
    public CompositeByteBuf compositeHeapBuffer(int maxNumComponents) {
        CompositeByteBuf buf = new CompositeByteBuf(this, false, maxNumComponents);
        return disableLeakDetector ? buf : toLeakAwareBuffer(buf);
    }

    @Override
    public CompositeByteBuf compositeDirectBuffer(int maxNumComponents) {
        CompositeByteBuf buf = new CompositeByteBuf(this, true, maxNumComponents);
        return disableLeakDetector ? buf : toLeakAwareBuffer(buf);
    }

    @Override
    public boolean isDirectBufferPooled() {
        return false;
    }
}