/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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 org.elasticsearch.cache.memory;
import org.apache.lucene.store.bytebuffer.ByteBufferAllocator;
import org.apache.lucene.store.bytebuffer.CachingByteBufferAllocator;
import org.apache.lucene.store.bytebuffer.PlainByteBufferAllocator;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.ByteSizeUnit;
import org.elasticsearch.common.unit.ByteSizeValue;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* @author kimchy (shay.banon)
*/
public class ByteBufferCache extends AbstractComponent implements ByteBufferAllocator {
private final boolean direct;
private final ByteSizeValue smallBufferSize;
private final ByteSizeValue largeBufferSize;
private final ByteSizeValue smallCacheSize;
private final ByteSizeValue largeCacheSize;
private final ByteBufferAllocator allocator;
public ByteBufferCache() {
this(ImmutableSettings.Builder.EMPTY_SETTINGS);
}
// really, for testing...
public ByteBufferCache(int bufferSizeInBytes, int cacheSizeInBytes, boolean direct) {
this(ImmutableSettings.settingsBuilder()
.put("cache.memory.small_buffer_size", bufferSizeInBytes)
.put("cache.memory.small_cache_size", cacheSizeInBytes)
.put("cache.memory.large_buffer_size", bufferSizeInBytes)
.put("cache.memory.large_cache_size", cacheSizeInBytes)
.put("cache.memory.direct", direct).build());
}
@Inject public ByteBufferCache(Settings settings) {
super(settings);
this.direct = componentSettings.getAsBoolean("direct", true);
this.smallBufferSize = componentSettings.getAsBytesSize("small_buffer_size", new ByteSizeValue(1, ByteSizeUnit.KB));
this.largeBufferSize = componentSettings.getAsBytesSize("large_buffer_size", new ByteSizeValue(1, ByteSizeUnit.MB));
this.smallCacheSize = componentSettings.getAsBytesSize("small_cache_size", new ByteSizeValue(10, ByteSizeUnit.MB));
this.largeCacheSize = componentSettings.getAsBytesSize("large_cache_size", new ByteSizeValue(500, ByteSizeUnit.MB));
if (smallCacheSize.bytes() == 0 || largeCacheSize.bytes() == 0) {
this.allocator = new PlainByteBufferAllocator(direct, (int) smallBufferSize.bytes(), (int) largeBufferSize.bytes());
} else {
this.allocator = new CachingByteBufferAllocator(direct, (int) smallBufferSize.bytes(), (int) largeBufferSize.bytes(), (int) smallCacheSize.bytes(), (int) largeCacheSize.bytes());
}
if (logger.isDebugEnabled()) {
logger.debug("using bytebuffer cache with small_buffer_size [{}], large_buffer_size [{}], small_cache_size [{}], large_cache_size [{}], direct [{}]",
smallBufferSize, largeBufferSize, smallCacheSize, largeCacheSize, direct);
}
}
public boolean direct() {
return this.direct;
}
public void close() {
allocator.close();
}
@Override public int sizeInBytes(Type type) {
return allocator.sizeInBytes(type);
}
@Override public ByteBuffer allocate(Type type) throws IOException {
return allocator.allocate(type);
}
@Override public void release(ByteBuffer buffer) {
allocator.release(buffer);
}
}