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/*
* Copyright 2012-2023 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements WHICH ARE COMPATIBLE WITH THE APACHE LICENSE, VERSION 2.0.
*
* Licensed 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 com.aerospike.client.util;
import com.aerospike.client.Log;
/**
* Thread local buffer storage.
*/
public final class ThreadLocalData {
/**
* Initial buffer size on first use of thread local buffer.
*/
public static int DefaultBufferSize = 8192;
private static final int THREAD_LOCAL_CUTOFF = 1024 * 128; // 128 KB
//private static final int MAX_BUFFER_SIZE = 1024 * 1024; // 1 MB
private static final ThreadLocal BufferThreadLocal = new ThreadLocal() {
@Override protected byte[] initialValue() {
return new byte[DefaultBufferSize];
}
};
/**
* Return thread local buffer.
*/
public static byte[] getBuffer() {
return BufferThreadLocal.get();
}
/**
* Resize and return thread local buffer if the requested size <= 128 KB.
* Otherwise, the thread local buffer will not be resized and a new
* buffer will be returned from heap memory.
*
* This method should only be called when the current buffer is too small to
* hold the desired data.
*/
public static byte[] resizeBuffer(int size) {
// Do not store extremely large buffers in thread local storage.
if (size > THREAD_LOCAL_CUTOFF) {
/*
if (size > MAX_BUFFER_SIZE) {
throw new IllegalArgumentException("Thread " + Thread.currentThread().getId() + " invalid buffer size: " + size);
}*/
if (Log.debugEnabled()) {
Log.debug("Thread " + Thread.currentThread().getName() + " allocate buffer on heap " + size);
}
return new byte[size];
}
if (Log.debugEnabled()) {
Log.debug("Thread " + Thread.currentThread().getName() + " resize buffer to " + size);
}
BufferThreadLocal.set(new byte[size]);
return BufferThreadLocal.get();
}
}