org.elasticsearch.index.deletionpolicy.SnapshotIndexCommit Maven / Gradle / Ivy
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.deletionpolicy;
import org.apache.lucene.index.IndexCommit;
import org.elasticsearch.common.lease.Releasable;
import org.elasticsearch.common.lucene.IndexCommitDelegate;
import java.io.IOException;
import java.util.ArrayList;
/**
* A snapshot index commit point. While this is held and {@link #close()}
* was not called, no files will be deleted that relates to this commit point
* ({@link #getFileNames()}).
*
*
*/
public class SnapshotIndexCommit extends IndexCommitDelegate implements Releasable {
private final SnapshotDeletionPolicy deletionPolicy;
private final String[] files;
SnapshotIndexCommit(SnapshotDeletionPolicy deletionPolicy, IndexCommit cp) throws IOException {
super(cp);
this.deletionPolicy = deletionPolicy;
ArrayList tmpFiles = new ArrayList<>();
for (String o : cp.getFileNames()) {
tmpFiles.add(o);
}
files = tmpFiles.toArray(new String[tmpFiles.size()]);
}
public String[] getFiles() {
return files;
}
/**
* Releases the current snapshot.
*/
@Override
public void close() {
deletionPolicy.close(getGeneration());
}
/**
* Override the delete operation, and only actually delete it if it
* is not held by the {@link SnapshotDeletionPolicy}.
*/
@Override
public void delete() {
if (!deletionPolicy.isHeld(getGeneration())) {
delegate.delete();
}
}
}