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Show all versions of org.apache.karaf.main
This bundle is the main Karaf launcher. It's responsible of the Karaf startup including
the console, branding, etc bootstrap.
/*
* 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.karaf.main;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;
import java.io.Writer;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.nio.channels.FileLock;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.felix.utils.properties.Properties;
import org.apache.karaf.util.locks.FileLockUtils;
import org.osgi.framework.launch.Framework;
public class InstanceHelper {
static void updateInstancePid(final File karafHome, File karafBase, final boolean isStartingInstance) {
try {
final String instanceName = System.getProperty("karaf.name");
final String pid = isStartingInstance ? getPid() : "0";
final boolean isRoot = karafHome.equals(karafBase);
if (instanceName != null) {
String storage = System.getProperty("karaf.instances");
if (storage == null) {
throw new Exception("System property 'karaf.instances' is not set. \n" +
"This property needs to be set to the full path of the instance.properties file.");
}
File storageFile = new File(storage);
final File propertiesFile = new File(storageFile, "instance.properties");
if (!propertiesFile.getParentFile().exists()) {
try {
if (!propertiesFile.getParentFile().mkdirs()) {
throw new Exception("Unable to create directory " + propertiesFile.getParentFile());
}
} catch (SecurityException se) {
throw new Exception(se.getMessage());
}
}
// don't instance.properties if we're stopping and can't acquire lock
if (!isStartingInstance) {
RandomAccessFile raf = new RandomAccessFile(propertiesFile, "rw");
boolean proceed = true;
try {
FileLock lock = raf.getChannel().tryLock();
if (lock == null) {
proceed = false;
} else {
lock.release();
}
} finally {
// if proceed is true than we got the lock or OverlappingFileLockException
// but we may proceed in either case
raf.close();
}
if (!proceed) {
// we didn't acquire lock, it may mean that root container is holding the lock when
// stopping the child
return;
}
}
FileLockUtils.execute(propertiesFile, new FileLockUtils.RunnableWithProperties() {
public void run(Properties props) throws IOException {
if (props.isEmpty()) {
if (isRoot) {
props.setProperty("count", "1");
props.setProperty("item.0.name", instanceName);
props.setProperty("item.0.loc", karafHome.getAbsolutePath());
props.setProperty("item.0.pid", pid);
props.setProperty("item.0.root", "true");
} else {
String errMsg = "Child instance " + (isStartingInstance ? "started" : "stopped") + " but no root registered in ";
throw new IllegalStateException(errMsg + propertiesFile);
}
} else {
int count = Integer.parseInt(props.getProperty("count"));
// update root name if karaf.name got updated since the last container start
if (isRoot) {
for (int i = 0; i < count; i++) {
//looking for root instance entry
boolean root = Boolean.parseBoolean(props.getProperty("item." + i + ".root", "false"));
if (root) {
props.setProperty("item." + i + ".name", instanceName);
props.setProperty("item." + i + ".pid", pid);
return;
}
}
throw new IllegalStateException("Unable to find root instance in " + propertiesFile);
} else {
for (int i = 0; i < count; i++) {
String name = props.getProperty("item." + i + ".name");
if (name.equals(instanceName)) {
props.setProperty("item." + i + ".pid", pid);
return;
}
}
throw new IllegalStateException("Unable to find instance '" + instanceName + "'in " + propertiesFile);
}
}
}
}, true);
}
} catch (Exception e) {
System.err.println("Unable to update instance pid: " + e.getMessage());
}
}
private static String getPid() {
String pid = ManagementFactory.getRuntimeMXBean().getName();
if (pid.indexOf('@') > 0) {
pid = pid.substring(0, pid.indexOf('@'));
}
return pid;
}
private static void writePid(String pidFile) {
try {
if (pidFile != null) {
RuntimeMXBean rtb = ManagementFactory.getRuntimeMXBean();
String processName = rtb.getName();
Pattern pattern = Pattern.compile("^([0-9]+)@.+$", Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(processName);
if (matcher.matches()) {
int pid = Integer.parseInt(matcher.group(1));
Writer w = new OutputStreamWriter(new FileOutputStream(pidFile));
w.write(Integer.toString(pid));
w.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
static void setupShutdown(ConfigProperties config, Framework framework) {
writePid(config.pidFile);
try {
int port = config.shutdownPort;
String host = config.shutdownHost;
String portFile = config.portFile;
final String shutdown = config.shutdownCommand;
if (port >= 0) {
ServerSocket shutdownSocket = new ServerSocket(port, 1, InetAddress.getByName(host));
if (port == 0) {
port = shutdownSocket.getLocalPort();
}
if (portFile != null) {
Writer w = new OutputStreamWriter(new FileOutputStream(portFile));
w.write(Integer.toString(port));
w.close();
}
Thread thread = new ShutdownSocketThread(shutdown, shutdownSocket, framework);
thread.setDaemon(true);
thread.start();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}