/*
* Copyright (C) 2015 hops.io.
*
* Licensed 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 io.hops.common;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import java.io.IOException;
public class IDsMonitor implements Runnable {
private static final Log LOG = LogFactory.getLog(IDsMonitor.class);
private static IDsMonitor instance = null;
private Thread th = null;
private int checkInterval;
private IDsMonitor() {
}
public static IDsMonitor getInstance() {
if (instance == null) {
instance = new IDsMonitor();
}
return instance;
}
public void setConfiguration(Configuration conf) {
IDsGeneratorFactory.getInstance().setConfiguration(conf.getInt
(DFSConfigKeys.DFS_NAMENODE_INODEID_BATCH_SIZE,
DFSConfigKeys.DFS_NAMENODE_INODEID_BATCH_SIZE_DEFAULT),
conf.getInt(DFSConfigKeys.DFS_NAMENODE_BLOCKID_BATCH_SIZE,
DFSConfigKeys.DFS_NAMENODE_BLOCKID_BATCH_SIZE_DEFAULT),
conf.getInt(DFSConfigKeys.DFS_NAMENODE_QUOTA_UPDATE_ID_BATCH_SIZE,
DFSConfigKeys.DFS_NAMENODE_QUOTA_UPDATE_ID_BATCH_SIZ_DEFAULT),
conf.getFloat(DFSConfigKeys.DFS_NAMENODE_INODEID_UPDATE_THRESHOLD,
DFSConfigKeys.DFS_NAMENODE_INODEID_UPDATE_THRESHOLD_DEFAULT),
conf.getFloat(DFSConfigKeys.DFS_NAMENODE_BLOCKID_UPDATE_THRESHOLD,
DFSConfigKeys.DFS_NAMENODE_BLOCKID_UPDATE_THRESHOLD_DEFAULT),
conf.getFloat(
DFSConfigKeys.DFS_NAMENODE_QUOTA_UPDATE_ID_UPDATE_THRESHOLD,
DFSConfigKeys.DFS_NAMENODE_QUOTA_UPDATE_ID_UPDATE_THRESHOLD_DEFAULT)
);
checkInterval = conf.getInt(DFSConfigKeys.DFS_NAMENODE_IDSMONITOR_CHECK_INTERVAL_IN_MS,
DFSConfigKeys.DFS_NAMENODE_IDSMONITOR_CHECK_INTERVAL_IN_MS_DEFAULT);
}
public void start() {
getNewIds(); // Avoid race conditions between operations and the first acquisition of ids
th = new Thread(this, "IDsMonitor");
th.setDaemon(true);
th.start();
}
@Override
public void run() {
while (true) {
getNewIds();
}
}
private void getNewIds() {
try {
IDsGeneratorFactory.getInstance().getNewIDs();
Thread.sleep(checkInterval);
} catch (InterruptedException ex) {
LOG.warn("IDsMonitor interrupted: " + ex);
} catch (IOException ex) {
LOG.warn("IDsMonitor got exception: " + ex);
}
}
}