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org.apache.zookeeper.ServerAdminClient Maven / Gradle / Ivy
/*
* 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;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@InterfaceAudience.Public
public class ServerAdminClient {
private static final Logger LOG = LoggerFactory.getLogger(ServerAdminClient.class);
public static void ruok(String host, int port) {
Socket s = null;
try {
byte[] reqBytes = new byte[4];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
req.putInt(ByteBuffer.wrap("ruok".getBytes()).getInt());
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[4];
int rc = is.read(resBytes);
String retv = new String(resBytes);
System.out.println("rc=" + rc + " retv=" + retv);
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
public static void dump(String host, int port) {
Socket s = null;
try {
byte[] reqBytes = new byte[4];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
req.putInt(ByteBuffer.wrap("dump".getBytes()).getInt());
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[1024];
int rc = is.read(resBytes);
String retv = new String(resBytes);
System.out.println("rc=" + rc + " retv=" + retv);
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
public static void stat(String host, int port) {
Socket s = null;
try {
byte[] reqBytes = new byte[4];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
req.putInt(ByteBuffer.wrap("stat".getBytes()).getInt());
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[1024];
int rc = is.read(resBytes);
String retv = new String(resBytes);
System.out.println("rc=" + rc + " retv=" + retv);
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
public static void kill(String host, int port) {
Socket s = null;
try {
byte[] reqBytes = new byte[4];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
req.putInt(ByteBuffer.wrap("kill".getBytes()).getInt());
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[4];
int rc = is.read(resBytes);
String retv = new String(resBytes);
System.out.println("rc=" + rc + " retv=" + retv);
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
public static void setTraceMask(String host, int port, String traceMaskStr) {
Socket s = null;
try {
byte[] reqBytes = new byte[12];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
long traceMask = Long.parseLong(traceMaskStr, 8);
req.putInt(ByteBuffer.wrap("stmk".getBytes()).getInt());
req.putLong(traceMask);
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[8];
int rc = is.read(resBytes);
ByteBuffer res = ByteBuffer.wrap(resBytes);
long retv = res.getLong();
System.out.println("rc=" + rc
+ " retv=0" + Long.toOctalString(retv)
+ " masks=0" + Long.toOctalString(traceMask));
assert (retv == traceMask);
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
public static void getTraceMask(String host, int port) {
Socket s = null;
try {
byte[] reqBytes = new byte[12];
ByteBuffer req = ByteBuffer.wrap(reqBytes);
req.putInt(ByteBuffer.wrap("gtmk".getBytes()).getInt());
s = new Socket();
s.setSoLinger(false, 10);
s.setSoTimeout(20000);
s.connect(new InetSocketAddress(host, port));
InputStream is = s.getInputStream();
OutputStream os = s.getOutputStream();
os.write(reqBytes);
byte[] resBytes = new byte[8];
int rc = is.read(resBytes);
ByteBuffer res = ByteBuffer.wrap(resBytes);
long retv = res.getLong();
System.out.println("rc=" + rc + " retv=0" + Long.toOctalString(retv));
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
} finally {
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.warn("Unexpected exception", e);
}
}
}
}
private static void usage() {
System.out.println("usage: java [-cp CLASSPATH] org.apache.zookeeper.ServerAdminClient "
+ "host port op (ruok|stat|dump|kill|gettracemask|settracemask) [arguments]");
}
public static void main(String[] args) {
if (args.length < 3) {
usage();
return;
}
String host = args[0];
int port = Integer.parseInt(args[1]);
String op = args[2];
if (op.equalsIgnoreCase("gettracemask")) {
getTraceMask(host, port);
} else if (op.equalsIgnoreCase("settracemask")) {
setTraceMask(host, port, args[3]);
} else if (op.equalsIgnoreCase("ruok")) {
ruok(host, port);
} else if (op.equalsIgnoreCase("kill")) {
kill(host, port);
} else if (op.equalsIgnoreCase("stat")) {
stat(host, port);
} else if (op.equalsIgnoreCase("dump")) {
dump(host, port);
} else {
System.out.println("Unrecognized op: " + op);
}
}
}
