/* * Copyright (c) 2004, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.jvmstat.perfdata.monitor.protocol.local;import sun.jvmstat.monitor.*;import sun.jvmstat.monitor.event.*;import java.util.*;import java.util.regex.*;import java.io.*;/** * Class for managing the LocalMonitoredVm instances on the local system. * <p> * This class is responsible for the mechanism that detects the active * HotSpot Java Virtual Machines on the local host and possibly for a * specific user. The ability to detect all possible HotSpot Java Virtual * Machines on the local host may be limited by the permissions of the * principal running this JVM. * * @author Brian Doherty * @since 1.5 */public class LocalVmManager { private String userName; // user name for monitored jvm private File tmpdir; private Pattern userPattern; private Matcher userMatcher; private FilenameFilter userFilter; private Pattern filePattern; private Matcher fileMatcher; private FilenameFilter fileFilter; private Pattern tmpFilePattern; private Matcher tmpFileMatcher; private FilenameFilter tmpFileFilter; /** * Creates a LocalVmManager instance for the local system. * <p> * Manages LocalMonitoredVm instances for which the principal * has appropriate permissions. */ public LocalVmManager() { this(null); } /** * Creates a LocalVmManager instance for the given user. * <p> * Manages LocalMonitoredVm instances for all JVMs owned by the specified * user. * * @param user the name of the user */ public LocalVmManager(String user) { this.userName = user; if (userName == null) { tmpdir = new File(PerfDataFile.getTempDirectory()); userPattern = Pattern.compile(PerfDataFile.userDirNamePattern); userMatcher = userPattern.matcher(""); userFilter = new FilenameFilter() { public boolean accept(File dir, String name) { userMatcher.reset(name); return userMatcher.lookingAt(); } }; } else { tmpdir = new File(PerfDataFile.getTempDirectory(userName)); } filePattern = Pattern.compile(PerfDataFile.fileNamePattern); fileMatcher = filePattern.matcher(""); fileFilter = new FilenameFilter() { public boolean accept(File dir, String name) { fileMatcher.reset(name); return fileMatcher.matches(); } }; tmpFilePattern = Pattern.compile(PerfDataFile.tmpFileNamePattern); tmpFileMatcher = tmpFilePattern.matcher(""); tmpFileFilter = new FilenameFilter() { public boolean accept(File dir, String name) { tmpFileMatcher.reset(name); return tmpFileMatcher.matches(); } }; } /** * Return the current set of monitorable Java Virtual Machines. * <p> * The set returned by this method depends on the user name passed * to the constructor. If no user name was specified, then this * method will return all candidate JVMs on the system. Otherwise, * only the JVMs for the given user will be returned. This assumes * that principal associated with this JVM has the appropriate * permissions to access the target set of JVMs. * * @return Set - the Set of monitorable Java Virtual Machines */ public synchronized Set<Integer> activeVms() { /* * This method is synchronized because the Matcher object used by * fileFilter is not safe for concurrent use, and this method is * called by multiple threads. Before this method was synchronized, * we'd see strange file names being matched by the matcher. */ Set<Integer> jvmSet = new HashSet<Integer>(); if (! tmpdir.isDirectory()) { return jvmSet; } if (userName == null) { /* * get a list of all of the user temporary directories and * iterate over the list to find any files within those directories. */ File[] dirs = tmpdir.listFiles(userFilter); for (int i = 0 ; i < dirs.length; i ++) { if (!dirs[i].isDirectory()) { continue; } // get a list of files from the directory File[] files = dirs[i].listFiles(fileFilter); if (files != null) { for (int j = 0; j < files.length; j++) { if (files[j].isFile() && files[j].canRead()) { jvmSet.add(new Integer( PerfDataFile.getLocalVmId(files[j]))); } } } } } else { /* * Check if the user directory can be accessed. Any of these * conditions may have asynchronously changed between subsequent * calls to this method. */ // get the list of files from the specified user directory File[] files = tmpdir.listFiles(fileFilter); if (files != null) { for (int j = 0; j < files.length; j++) { if (files[j].isFile() && files[j].canRead()) { jvmSet.add(new Integer( PerfDataFile.getLocalVmId(files[j]))); } } } } // look for any 1.4.1 files File[] files = tmpdir.listFiles(tmpFileFilter); if (files != null) { for (int j = 0; j < files.length; j++) { if (files[j].isFile() && files[j].canRead()) { jvmSet.add(new Integer( PerfDataFile.getLocalVmId(files[j]))); } } } return jvmSet; }}
/*
* Copyright (c) 2004, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.jvmstat.perfdata.monitor.protocol.local;
import sun.jvmstat.monitor.*;
import sun.jvmstat.monitor.event.*;
import java.util.*;
import java.util.regex.*;
import java.io.*;
/**
* Class for managing the LocalMonitoredVm instances on the local system.
* <p>
* This class is responsible for the mechanism that detects the active
* HotSpot Java Virtual Machines on the local host and possibly for a
* specific user. The ability to detect all possible HotSpot Java Virtual
* Machines on the local host may be limited by the permissions of the
* principal running this JVM.
*
* @author Brian Doherty
* @since 1.5
*/
public class LocalVmManager {
private String userName; // user name for monitored jvm
private File tmpdir;
private Pattern userPattern;
private Matcher userMatcher;
private FilenameFilter userFilter;
private Pattern filePattern;
private Matcher fileMatcher;
private FilenameFilter fileFilter;
private Pattern tmpFilePattern;
private Matcher tmpFileMatcher;
private FilenameFilter tmpFileFilter;
/**
* Creates a LocalVmManager instance for the local system.
* <p>
* Manages LocalMonitoredVm instances for which the principal
* has appropriate permissions.
*/
public LocalVmManager() {
this(null);
}
/**
* Creates a LocalVmManager instance for the given user.
* <p>
* Manages LocalMonitoredVm instances for all JVMs owned by the specified
* user.
*
* @param user the name of the user
*/
public LocalVmManager(String user) {
this.userName = user;
if (userName == null) {
tmpdir = new File(PerfDataFile.getTempDirectory());
userPattern = Pattern.compile(PerfDataFile.userDirNamePattern);
userMatcher = userPattern.matcher("");
userFilter = new FilenameFilter() {
public boolean accept(File dir, String name) {
userMatcher.reset(name);
return userMatcher.lookingAt();
}
};
} else {
tmpdir = new File(PerfDataFile.getTempDirectory(userName));
}
filePattern = Pattern.compile(PerfDataFile.fileNamePattern);
fileMatcher = filePattern.matcher("");
fileFilter = new FilenameFilter() {
public boolean accept(File dir, String name) {
fileMatcher.reset(name);
return fileMatcher.matches();
}
};
tmpFilePattern = Pattern.compile(PerfDataFile.tmpFileNamePattern);
tmpFileMatcher = tmpFilePattern.matcher("");
tmpFileFilter = new FilenameFilter() {
public boolean accept(File dir, String name) {
tmpFileMatcher.reset(name);
return tmpFileMatcher.matches();
}
};
}
/**
* Return the current set of monitorable Java Virtual Machines.
* <p>
* The set returned by this method depends on the user name passed
* to the constructor. If no user name was specified, then this
* method will return all candidate JVMs on the system. Otherwise,
* only the JVMs for the given user will be returned. This assumes
* that principal associated with this JVM has the appropriate
* permissions to access the target set of JVMs.
*
* @return Set - the Set of monitorable Java Virtual Machines
*/
public synchronized Set<Integer> activeVms() {
/*
* This method is synchronized because the Matcher object used by
* fileFilter is not safe for concurrent use, and this method is
* called by multiple threads. Before this method was synchronized,
* we'd see strange file names being matched by the matcher.
*/
Set<Integer> jvmSet = new HashSet<Integer>();
if (! tmpdir.isDirectory()) {
return jvmSet;
}
if (userName == null) {
/*
* get a list of all of the user temporary directories and
* iterate over the list to find any files within those directories.
*/
File[] dirs = tmpdir.listFiles(userFilter);
for (int i = 0 ; i < dirs.length; i ++) {
if (!dirs[i].isDirectory()) {
continue;
}
// get a list of files from the directory
File[] files = dirs[i].listFiles(fileFilter);
if (files != null) {
for (int j = 0; j < files.length; j++) {
if (files[j].isFile() && files[j].canRead()) {
jvmSet.add(new Integer(
PerfDataFile.getLocalVmId(files[j])));
}
}
}
}
} else {
/*
* Check if the user directory can be accessed. Any of these
* conditions may have asynchronously changed between subsequent
* calls to this method.
*/
// get the list of files from the specified user directory
File[] files = tmpdir.listFiles(fileFilter);
if (files != null) {
for (int j = 0; j < files.length; j++) {
if (files[j].isFile() && files[j].canRead()) {
jvmSet.add(new Integer(
PerfDataFile.getLocalVmId(files[j])));
}
}
}
}
// look for any 1.4.1 files
File[] files = tmpdir.listFiles(tmpFileFilter);
if (files != null) {
for (int j = 0; j < files.length; j++) {
if (files[j].isFile() && files[j].canRead()) {
jvmSet.add(new Integer(
PerfDataFile.getLocalVmId(files[j])));
}
}
}
return jvmSet;
}
}