/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.accumulo.monitor;
import java.util.Collection;
import java.util.SortedSet;
import java.util.TreeSet;
import org.apache.accumulo.core.Constants;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.core.util.TTimeoutTransport;
import org.apache.accumulo.core.util.UtilWaitThread;
import org.apache.accumulo.server.conf.ServerConfiguration;
import org.apache.log4j.Logger;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
import com.google.common.net.HostAndPort;
public class ZooKeeperStatus implements Runnable {
private static final Logger log = Logger.getLogger(ZooKeeperStatus.class);
private volatile boolean stop = false;
public static class ZooKeeperState implements Comparable<ZooKeeperState> {
public final String keeper;
public final String mode;
public final int clients;
public ZooKeeperState(String keeper, String mode, int clients) {
this.keeper = keeper;
this.mode = mode;
this.clients = clients;
}
@Override
public int compareTo(ZooKeeperState other) {
if (this == other) {
return 0;
} else if (other == null) {
return 1;
} else {
if (this.keeper == other.keeper) {
return 0;
} else if (null == this.keeper) {
return -1;
} else if (null == other.keeper) {
return 1;
} else {
return this.keeper.compareTo(other.keeper);
}
}
}
}
private static SortedSet<ZooKeeperState> status = new TreeSet<ZooKeeperState>();
public static Collection<ZooKeeperState> getZooKeeperStatus() {
return status;
}
public void stop() {
this.stop = true;
}
@Override
public void run() {
while (!stop) {
TreeSet<ZooKeeperState> update = new TreeSet<ZooKeeperState>();
String zookeepers[] = ServerConfiguration.getSiteConfiguration().get(Property.INSTANCE_ZK_HOST).split(",");
for (String keeper : zookeepers) {
int clients = 0;
String mode = "unknown";
String[] parts = keeper.split(":");
TTransport transport = null;
try {
HostAndPort addr;
if (parts.length > 1)
addr = HostAndPort.fromParts(parts[0], Integer.parseInt(parts[1]));
else
addr = HostAndPort.fromParts(parts[0], 2181);
transport = TTimeoutTransport.create(addr, 10 * 1000l);
transport.write("stat\n".getBytes(Constants.UTF8), 0, 5);
StringBuilder response = new StringBuilder();
try {
transport.flush();
byte[] buffer = new byte[1024 * 100];
int n = 0;
while ((n = transport.read(buffer, 0, buffer.length)) > 0) {
response.append(new String(buffer, 0, n, Constants.UTF8));
}
} catch (TTransportException ex) {
// happens at EOF
}
for (String line : response.toString().split("\n")) {
if (line.startsWith(" "))
clients++;
if (line.startsWith("Mode"))
mode = line.split(":")[1];
}
update.add(new ZooKeeperState(keeper, mode, clients));
} catch (Exception ex) {
log.info("Exception talking to zookeeper " + keeper, ex);
update.add(new ZooKeeperState(keeper, "Down", -1));
} finally {
if (transport != null) {
try {
transport.close();
} catch (Exception ex) {
log.error(ex, ex);
}
}
}
}
status = update;
UtilWaitThread.sleep(5 * 1000);
}
}
}