org.graylog2.indexer.NodeInfoCache Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.indexer;
import com.github.joschi.jadconfig.util.Duration;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.graylog2.indexer.cluster.Cluster;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Optional;
@Singleton
public class NodeInfoCache {
private static final Duration EXPIRE_DURATION = Duration.minutes(1L);
private final LoadingCache> nodeNameCache;
private final LoadingCache> hostNameCache;
@Inject
public NodeInfoCache(Cluster cluster) {
this.nodeNameCache = CacheBuilder.newBuilder()
.expireAfterWrite(EXPIRE_DURATION.getQuantity(), EXPIRE_DURATION.getUnit())
.build(CacheLoader.from(cluster::nodeIdToName));
this.hostNameCache = CacheBuilder.newBuilder()
.expireAfterWrite(EXPIRE_DURATION.getQuantity(), EXPIRE_DURATION.getUnit())
.build(CacheLoader.from(cluster::nodeIdToHostName));
}
public Optional getNodeName(String nodeId) {
return nodeNameCache.getUnchecked(nodeId);
}
public Optional getHostName(String nodeId) {
return hostNameCache.getUnchecked(nodeId);
}
}