Apache ZooKeeper IT Source Code
Apache ZooKeeper is an open-source server which enables highly
reliable distributed coordination.
Apache ZooKeeper IT Source Code files are provided in the source package file, apache-zookeeper-3.8.0.tar.gz.
You can download apache-zookeeper-3.8.0.tar.gz as described in the previous tutorial and go to the "zookeeper-it" sub-folder to view Apache ZooKeeper IT Source Code files.
You can also browse Apache ZooKeeper IT Source Code below:
✍: FYIcenter.com
⏎ org/apache/zookeeper/test/system/GenerateLoad.java
/**
* 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.system;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import org.apache.zookeeper.server.ExitCode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.zookeeper.AsyncCallback.DataCallback;
import org.apache.zookeeper.AsyncCallback.StatCallback;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.EventType;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.common.Time;
public class GenerateLoad {
protected static final Logger LOG = LoggerFactory.getLogger(GenerateLoad.class);
static ServerSocket ss;
static Set<SlaveThread> slaves = Collections
.synchronizedSet(new HashSet<SlaveThread>());
static Map<Long, Long> totalByTime = new HashMap<Long, Long>();
volatile static long currentInterval;
static long lastChange;
static PrintStream sf;
static PrintStream tf;
static {
try {
tf = new PrintStream(new FileOutputStream("trace"));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
static final int INTERVAL = 6000;
synchronized static void add(long time, int count, Socket s) {
long interval = time / INTERVAL;
if (currentInterval == 0 || currentInterval > interval) {
LOG.info(
"Dropping " + count + " for " + new Date(time)
+ " " + currentInterval + ">" + interval);
return;
}
// We track totals by seconds
Long total = totalByTime.get(interval);
if (total == null) {
totalByTime.put(interval, (long) count);
} else {
totalByTime.put(interval, total.longValue() + count);
}
tf.println(interval + " " + count + " " + s);
}
synchronized static long remove(long interval) {
Long total = totalByTime.remove(interval);
return total == null ? -1 : total;
}
static class SlaveThread extends Thread {
Socket s;
SlaveThread(Socket s) {
setDaemon(true);
this.s = s;
start();
}
public void run() {
try {
LOG.info("Connected to " + s);
BufferedReader is = new BufferedReader(new InputStreamReader(s
.getInputStream()));
String result;
while ((result = is.readLine()) != null) {
String timePercentCount[] = result.split(" ");
if (timePercentCount.length != 5) {
LOG.error("Got " + result + " from " + s
+ " exitng.");
throw new IOException(result);
}
long time = Long.parseLong(timePercentCount[0]);
// int percent = Integer.parseInt(timePercentCount[1]);
int count = Integer.parseInt(timePercentCount[2]);
int errs = Integer.parseInt(timePercentCount[3]);
if (errs > 0) {
LOG.error(s + " Got an error! " + errs);
}
add(time, count, s);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
close();
}
}
void send(int percentage) {
try {
s.getOutputStream().write((percentage + "\n").getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}
void close() {
try {
LOG.info("Closing " + s);
slaves.remove(this);
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
static class AcceptorThread extends Thread {
AcceptorThread() {
setDaemon(true);
start();
}
public void run() {
try {
while (true) {
Socket s = ss.accept();
LOG.info("Accepted connection from " + s);
slaves.add(new SlaveThread(s));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
for (Iterator<SlaveThread> it = slaves.iterator(); it.hasNext();) {
SlaveThread st = it.next();
it.remove();
st.close();
}
}
}
}
static class ReporterThread extends Thread {
static int percentage;
ReporterThread() {
setDaemon(true);
start();
}
public void run() {
try {
currentInterval = Time.currentElapsedTime() / INTERVAL;
// Give things time to report;
Thread.sleep(INTERVAL * 2);
long min = 99999;
long max = 0;
long total = 0;
int number = 0;
while (true) {
long now = Time.currentElapsedTime();
long lastInterval = currentInterval;
currentInterval += 1;
long count = remove(lastInterval);
count = count * 1000 / INTERVAL; // Multiply by 1000 to get
// reqs/sec
if (lastChange != 0
&& (lastChange + INTERVAL * 3) < now) {
// We only want to print anything if things have had a
// chance to change
if (count < min) {
min = count;
}
if (count > max) {
max = count;
}
total += count;
number++;
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(lastInterval * INTERVAL);
String report = lastInterval + " "
+ calendar.get(Calendar.HOUR_OF_DAY) + ":"
+ calendar.get(Calendar.MINUTE) + ":"
+ calendar.get(Calendar.SECOND) + " "
+ percentage + "% " + count + " " + min + " "
+ ((double) total / (double) number) + " "
+ max;
LOG.info(report);
if (sf != null) {
sf.println(report);
}
} else {
max = total = 0;
min = 999999999;
number = 0;
}
Thread.sleep(INTERVAL);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
synchronized static void sendChange(int percentage) {
long now = Time.currentElapsedTime();
long start = now;
ReporterThread.percentage = percentage;
for (SlaveThread st : slaves.toArray(new SlaveThread[0])) {
st.send(percentage);
}
now = Time.currentElapsedTime();
long delay = now - start;
if (delay > 1000) {
LOG.info("Delay of " + delay + " to send new percentage");
}
lastChange = now;
}
static public class GeneratorInstance implements Instance {
byte bytes[];
int percentage = -1;
int errors;
final Object statSync = new Object();
int finished;
int reads;
int writes;
int rlatency;
int wlatency;
int outstanding;
volatile boolean alive;
class ZooKeeperThread extends Thread implements Watcher, DataCallback,
StatCallback {
String host;
ZooKeeperThread(String host) {
setDaemon(true);
alive = true;
this.host = host;
start();
}
static final int outstandingLimit = 100;
synchronized void incOutstanding() throws InterruptedException {
outstanding++;
while (outstanding > outstandingLimit) {
wait();
}
}
synchronized void decOutstanding() {
outstanding--;
notifyAll();
}
Random r = new Random();
String path;
ZooKeeper zk;
boolean connected;
public void run() {
try {
zk = new ZooKeeper(host, 60000, this);
synchronized (this) {
if (!connected) {
wait(20000);
}
}
for (int i = 0; i < 300; i++) {
try {
Thread.sleep(100);
path = zk.create("/client", new byte[16],
Ids.OPEN_ACL_UNSAFE,
CreateMode.EPHEMERAL_SEQUENTIAL);
break;
} catch (KeeperException e) {
LOG.error("keeper exception thrown", e);
}
}
if (path == null) {
LOG.error("Couldn't create a node in /!");
return;
}
while (alive) {
if (r.nextInt(100) < percentage) {
zk.setData(path, bytes, -1, this, System
.currentTimeMillis());
} else {
zk.getData(path, false, this, System
.currentTimeMillis());
}
incOutstanding();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
alive = false;
try {
zk.close();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void process(WatchedEvent event) {
LOG.info(event.toString());
synchronized (this) {
if (event.getType() == EventType.None) {
connected = (event.getState() == KeeperState.SyncConnected);
notifyAll();
}
}
}
public void processResult(int rc, String path, Object ctx, byte[] data,
Stat stat) {
decOutstanding();
synchronized (statSync) {
if (!alive) {
return;
}
if (rc != 0) {
LOG.info("Got rc = " + rc);
errors++;
} else {
finished++;
rlatency += Time.currentElapsedTime() - (Long) ctx;
reads++;
}
}
}
public void processResult(int rc, String path, Object ctx, Stat stat) {
decOutstanding();
synchronized (statSync) {
if (rc != 0) {
LOG.info("Got rc = " + rc);
errors++;
} else {
finished++;
wlatency += Time.currentElapsedTime() - (Long) ctx;
writes++;
}
}
}
}
class SenderThread extends Thread {
Socket s;
SenderThread(Socket s) {
this.s = s;
setDaemon(true);
start();
}
public void run() {
try {
OutputStream os = s.getOutputStream();
finished = 0;
errors = 0;
while (alive) {
Thread.sleep(300);
if (percentage == -1 || (finished == 0 && errors == 0)) {
continue;
}
String report = Time.currentElapsedTime() + " "
+ percentage + " " + finished + " " + errors + " "
+ outstanding + "\n";
/* String subreport = reads + " "
+ (((double) rlatency) / reads) + " " + writes
+ " " + (((double) wlatency / writes)); */
synchronized (statSync) {
finished = 0;
errors = 0;
reads = 0;
writes = 0;
rlatency = 0;
wlatency = 0;
}
os.write(report.getBytes());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Socket s;
ZooKeeperThread zkThread;
SenderThread sendThread;
Reporter r;
public void configure(final String params) {
LOG.info("Got " + params);
new Thread() {
public void run() {
try {
String parts[] = params.split(" ");
String hostPort[] = parts[1].split(":");
int bytesSize = 1024;
if (parts.length == 3) {
try {
bytesSize = Integer.parseInt(parts[2]);
} catch (Exception e) {
LOG.error("Not an integer: " + parts[2]);
}
}
bytes = new byte[bytesSize];
s = new Socket(hostPort[0], Integer.parseInt(hostPort[1]));
zkThread = new ZooKeeperThread(parts[0]);
sendThread = new SenderThread(s);
BufferedReader is = new BufferedReader(new InputStreamReader(s
.getInputStream()));
String line;
while ((line = is.readLine()) != null) {
percentage = Integer.parseInt(line);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}.start();
}
public void setReporter(Reporter r) {
this.r = r;
}
public void start() {
try {
r.report("started");
} catch (Exception e) {
e.printStackTrace();
}
}
public void stop() {
alive = false;
zkThread.interrupt();
sendThread.interrupt();
try {
zkThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
try {
sendThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
try {
r.report("stopped");
} catch (Exception e) {
e.printStackTrace();
}
try {
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private static class StatusWatcher implements Watcher {
volatile boolean connected;
public void process(WatchedEvent event) {
if (event.getType() == Watcher.Event.EventType.None) {
synchronized (this) {
connected = event.getState() == Watcher.Event.KeeperState.SyncConnected;
notifyAll();
}
}
}
synchronized public boolean waitConnected(long timeout)
throws InterruptedException {
long endTime = Time.currentElapsedTime() + timeout;
while (!connected && Time.currentElapsedTime() < endTime) {
wait(endTime - Time.currentElapsedTime());
}
return connected;
}
}
private static boolean leaderOnly;
private static boolean leaderServes;
private static String []processOptions(String args[]) {
ArrayList<String> newArgs = new ArrayList<String>();
for(String a: args) {
if (a.equals("--leaderOnly")) {
leaderOnly = true;
leaderServes = true;
} else if (a.equals("--leaderServes")) {
leaderServes = true;
} else {
newArgs.add(a);
}
}
return newArgs.toArray(new String[0]);
}
/**
* @param args
* @throws InterruptedException
* @throws KeeperException
* @throws DuplicateNameException
* @throws NoAvailableContainers
* @throws NoAssignmentException
*/
public static void main(String[] args) throws InterruptedException,
KeeperException, NoAvailableContainers, DuplicateNameException,
NoAssignmentException {
args = processOptions(args);
if (args.length == 5) {
try {
StatusWatcher statusWatcher = new StatusWatcher();
ZooKeeper zk = new ZooKeeper(args[0], 15000, statusWatcher);
if (!statusWatcher.waitConnected(5000)) {
LOG.error("Could not connect to " + args[0]);
return;
}
InstanceManager im = new InstanceManager(zk, args[1]);
ss = new ServerSocket(0);
int port = ss.getLocalPort();
int serverCount = Integer.parseInt(args[2]);
int clientCount = Integer.parseInt(args[3]);
StringBuilder quorumHostPort = new StringBuilder();
StringBuilder zkHostPort = new StringBuilder();
for (int i = 0; i < serverCount; i++) {
String r[] = QuorumPeerInstance.createServer(im, i, leaderServes);
if (i > 0) {
quorumHostPort.append(',');
zkHostPort.append(',');
}
zkHostPort.append(r[0]); // r[0] == "host:clientPort"
quorumHostPort.append(r[1]); // r[1] == "host:leaderPort:leaderElectionPort"
quorumHostPort.append(";"+(r[0].split(":"))[1]); // Appending ";clientPort"
}
for (int i = 0; i < serverCount; i++) {
QuorumPeerInstance.startInstance(im, quorumHostPort
.toString(), i);
}
if (leaderOnly) {
int tries = 0;
outer:
while(true) {
Thread.sleep(1000);
IOException lastException = null;
String parts[] = zkHostPort.toString().split(",");
for(int i = 0; i < parts.length; i++) {
try {
String mode = getMode(parts[i]);
if (mode.equals("leader")) {
zkHostPort = new StringBuilder(parts[i]);
LOG.info("Connecting exclusively to " + zkHostPort.toString());
break outer;
}
} catch(IOException e) {
lastException = e;
}
}
if (tries++ > 3) {
throw lastException;
}
}
}
for (int i = 0; i < clientCount; i++) {
im.assignInstance("client" + i, GeneratorInstance.class,
zkHostPort.toString()
+ ' '
+ InetAddress.getLocalHost()
.getCanonicalHostName() + ':'
+ port, 1);
}
new AcceptorThread();
new ReporterThread();
BufferedReader is = new BufferedReader(new InputStreamReader(
System.in));
String line;
while ((line = is.readLine()) != null) {
try {
String cmdNumber[] = line.split(" ");
if (cmdNumber[0].equals("percentage")
&& cmdNumber.length > 1) {
int number = Integer.parseInt(cmdNumber[1]);
if (number < 0 || number > 100) {
throw new NumberFormatException(
"must be between 0 and 100");
}
sendChange(number);
} else if (cmdNumber[0].equals("sleep")
&& cmdNumber.length > 1) {
int number = Integer.parseInt(cmdNumber[1]);
Thread.sleep(number * 1000);
} else if (cmdNumber[0].equals("save")
&& cmdNumber.length > 1) {
sf = new PrintStream(cmdNumber[1]);
} else {
LOG.error("Commands must be:");
LOG.error("\tpercentage new_write_percentage");
LOG.error("\tsleep seconds_to_sleep");
LOG.error("\tsave file_to_save_output");
}
} catch (NumberFormatException e) {
LOG.error("Not a valid number: "
+ e.getMessage());
}
}
} catch (NumberFormatException e) {
doUsage();
} catch (IOException e) {
e.printStackTrace();
System.exit(ExitCode.INVALID_INVOCATION.getValue());
}
} else {
doUsage();
}
}
private static String getMode(String hostPort) throws NumberFormatException, UnknownHostException, IOException {
String parts[] = hostPort.split(":");
Socket s = new Socket(parts[0], Integer.parseInt(parts[1]));
s.getOutputStream().write("stat".getBytes());
BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
String line;
try {
while((line = br.readLine()) != null) {
if (line.startsWith("Mode: ")) {
return line.substring(6);
}
}
return "unknown";
} finally {
s.close();
}
}
private static void doUsage() {
System.err.println("USAGE: " + GenerateLoad.class.getName()
+ " [--leaderOnly] [--leaderServes] zookeeper_host:port containerPrefix #ofServers #ofClients requestSize");
System.exit(ExitCode.INVALID_INVOCATION.getValue());
}
}
⏎ org/apache/zookeeper/test/system/GenerateLoad.java
Or download all of them as a single archive file:
File name: zookeeper-it-3.8.0-fyi.zip File size: 30377 bytes Release date: 2022-02-25 Download
⇒ Download Apache ZooKeeper 3.7.0 Binary Package
⇐ Apache ZooKeeper Jute Source Code
2022-11-16, 944👍, 0💬
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