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RamDirectoryService.java
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RamDirectoryService.java
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/*
* 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.index.store.ram;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.store.RAMFile;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.settings.IndexSettings;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.index.store.DirectoryService;
import java.io.FileNotFoundException;
import java.io.IOException;
/**
*/
public class RamDirectoryService extends AbstractIndexShardComponent implements DirectoryService {
@Inject public RamDirectoryService(ShardId shardId, @IndexSettings Settings indexSettings) {
super(shardId, indexSettings);
}
@Override public Directory[] build() {
return new Directory[]{new CustomRAMDirectory()};
}
@Override public void renameFile(Directory dir, String from, String to) throws IOException {
((CustomRAMDirectory) dir).renameTo(from, to);
}
@Override public void fullDelete(Directory dir) {
}
static class CustomRAMDirectory extends RAMDirectory {
public synchronized void renameTo(String from, String to) throws IOException {
RAMFile fromFile = fileMap.get(from);
if (fromFile == null)
throw new FileNotFoundException(from);
RAMFile toFile = fileMap.get(to);
if (toFile != null) {
sizeInBytes.addAndGet(-fileLength(from));
fileMap.remove(from);
}
fileMap.put(to, fromFile);
}
}
}