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/*
* 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.zookeeper.test;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.apache.zookeeper.server.ExitCode;
public class SledgeHammer extends Thread {
ZooKeeper zk;
int count;
int readsPerWrite;
public SledgeHammer(String hosts, int count, int readsPerWrite) throws Exception {
zk = ClientBase.createZKClient(hosts, 10000);
this.count = count;
this.readsPerWrite = readsPerWrite;
}
public void run() {
try {
Stat stat = new Stat();
String path = zk.create("/hammers/hammer-", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
byte[] tag = (path + " was here!").getBytes();
synchronized (this) {
String startPath = "/hammers/start";
System.out.println("Waiting for " + startPath);
while (zk.exists(startPath, true) == null) {
wait();
}
System.out.println("Running");
}
for (int i = 0; i < count; i++) {
try {
System.out.print(i + "\r");
List<String> childs = zk.getChildren("/hammers", false);
Collections.shuffle(childs);
for (String s : childs) {
if (s.startsWith("hammer-")) {
s = "/hammers/" + s;
zk.setData(s, tag, -1);
for (int j = 0; j < readsPerWrite; j++) {
zk.getData(s, false, stat);
}
break;
}
}
} catch (KeeperException.ConnectionLossException e) {
// ignore connection loss
} catch (KeeperException e) {
e.printStackTrace();
}
}
System.out.println();
zk.close();
} catch (RuntimeException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (KeeperException e) {
e.printStackTrace();
}
}
/**
* @param args
* @throws IOException
* @throws KeeperException
* @throws NumberFormatException
*/
public static void main(String[] args) throws Exception {
if (args.length != 3) {
System.err.println("USAGE: SledgeHammer zookeeper_server reps reads_per_rep");
System.exit(ExitCode.UNABLE_TO_ACCESS_DATADIR.getValue());
}
SledgeHammer h = new SledgeHammer(args[0], Integer.parseInt(args[1]), Integer.parseInt(args[2]));
h.start();
System.exit(ExitCode.EXECUTION_FINISHED.getValue());
}
}
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