org.elasticsearch.index.deletionpolicy.KeepLastNDeletionPolicy Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.inject.Inject;
import org.elasticsearch.index.settings.IndexSettingsService;
import org.elasticsearch.index.shard.ShardId;
import java.io.IOException;
import java.util.List;
/**
*
*/
public class KeepLastNDeletionPolicy extends AbstractESDeletionPolicy {
private final int numToKeep;
@Inject
public KeepLastNDeletionPolicy(ShardId shardId, IndexSettingsService indexSettingsService) {
super(shardId, indexSettingsService.getSettings());
this.numToKeep = indexSettings.getAsInt("index.deletionpolicy.num_to_keep", 5);
logger.debug("Using [keep_last_n] deletion policy with num_to_keep[{}]", numToKeep);
}
@Override
public void onInit(List commits) throws IOException {
// do no deletions on init
doDeletes(commits);
}
@Override
public void onCommit(List commits) throws IOException {
doDeletes(commits);
}
private void doDeletes(List commits) {
int size = commits.size();
for (int i = 0; i < size - numToKeep; i++) {
commits.get(i).delete();
}
}
}