author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8197 | e45f21c2a40b |
permissions | -rw-r--r-- |
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/* |
9035
1255eb81cc2f
7033660: Update copyright year to 2011 on any files changed in 2011
ohair
parents:
8197
diff
changeset
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* Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.jvmstat.monitor; |
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/** |
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* Utility class proving concenience methods for extracting various |
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* information from an MonitoredVm object. |
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* |
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* @author Brian Doherty |
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* @since 1.5 |
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*/ |
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public class MonitoredVmUtil { |
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/** |
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* Private constructor - prevent instantiation. |
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*/ |
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private MonitoredVmUtil() { } |
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/** |
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* Return the Java Virtual Machine Version. |
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* |
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* @param vm the target MonitoredVm |
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* @return String - contains the version of the target JVM or the |
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* the string "Unknown" if the version cannot be |
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* determined. |
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*/ |
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public static String vmVersion(MonitoredVm vm) throws MonitorException { |
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StringMonitor ver = |
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(StringMonitor)vm.findByName("java.property.java.vm.version"); |
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return (ver == null) ? "Unknown" : ver.stringValue(); |
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} |
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/** |
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* Return the command line for the target Java application. |
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* |
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* @param vm the target MonitoredVm |
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* @return String - contains the command line of the target Java |
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* application or the the string "Unknown" if the |
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* command line cannot be determined. |
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*/ |
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public static String commandLine(MonitoredVm vm) throws MonitorException { |
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StringMonitor cmd = (StringMonitor)vm.findByName("sun.rt.javaCommand"); |
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return (cmd == null) ? "Unknown" : cmd.stringValue(); |
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} |
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/** |
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* Return the arguments to the main class for the target Java application. |
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* Returns the arguments to the main class. If the arguments can't be |
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* found, the string "Unknown" is returned. |
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* |
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* @param vm the target MonitoredVm |
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* @return String - contains the arguments to the main class for the |
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* target Java application or the the string "Unknown" |
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* if the command line cannot be determined. |
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*/ |
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public static String mainArgs(MonitoredVm vm) throws MonitorException { |
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String commandLine = commandLine(vm); |
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int firstSpace = commandLine.indexOf(' '); |
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if (firstSpace > 0) { |
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return commandLine.substring(firstSpace + 1); |
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} else if (commandLine.compareTo("Unknown") == 0) { |
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return commandLine; |
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} else { |
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return null; |
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} |
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} |
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/** |
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* Return the main class for the target Java application. |
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* Returns the main class or the name of the jar file if the application |
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* was started with the <em>-jar</em> option. |
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* |
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* @param vm the target MonitoredVm |
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* @param fullPath include the full path to Jar file, where applicable |
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* @return String - contains the main class of the target Java |
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* application or the the string "Unknown" if the |
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* command line cannot be determined. |
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*/ |
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public static String mainClass(MonitoredVm vm, boolean fullPath) |
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throws MonitorException { |
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String commandLine = commandLine(vm); |
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String arg0 = commandLine; |
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int firstSpace = commandLine.indexOf(' '); |
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if (firstSpace > 0) { |
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arg0 = commandLine.substring(0, firstSpace); |
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} |
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if (!fullPath) { |
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/* |
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* can't use File.separator() here because the separator |
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* for the target jvm may be different than the separator |
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* for the monitoring jvm. |
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*/ |
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int lastFileSeparator = arg0.lastIndexOf('/'); |
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if (lastFileSeparator > 0) { |
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return arg0.substring(lastFileSeparator + 1); |
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} |
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lastFileSeparator = arg0.lastIndexOf('\\'); |
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if (lastFileSeparator > 0) { |
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return arg0.substring(lastFileSeparator + 1); |
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} |
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int lastPackageSeparator = arg0.lastIndexOf('.'); |
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if (lastPackageSeparator > 0) { |
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return arg0.substring(lastPackageSeparator + 1); |
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} |
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} |
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return arg0; |
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} |
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/** |
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* Return the JVM arguments for the target Java application. |
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* |
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* @param vm the target MonitoredVm |
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* @return String - contains the arguments passed to the JVM for the |
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* target Java application or the the string "Unknown" |
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* if the command line cannot be determined. |
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*/ |
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public static String jvmArgs(MonitoredVm vm) throws MonitorException { |
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StringMonitor jvmArgs = (StringMonitor)vm.findByName("java.rt.vmArgs"); |
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return (jvmArgs == null) ? "Unknown" : jvmArgs.stringValue(); |
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} |
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/** |
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* Return the JVM flags for the target Java application. |
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* |
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* @param vm the target MonitoredVm |
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* @return String - contains the flags passed to the JVM for the |
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* target Java application or the the string "Unknown" |
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* if the command line cannot be determined. |
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*/ |
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public static String jvmFlags(MonitoredVm vm) throws MonitorException { |
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StringMonitor jvmFlags = |
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(StringMonitor)vm.findByName("java.rt.vmFlags"); |
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return (jvmFlags == null) ? "Unknown" : jvmFlags.stringValue(); |
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} |
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// Index of the sun.rt.jvmCapabilities counter |
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private static int IS_ATTACHABLE = 0; |
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private static int IS_KERNEL_VM = 1; |
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/** |
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* Returns true if the VM supports attach-on-demand. |
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* |
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* @param vm the target MonitoredVm |
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*/ |
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public static boolean isAttachable(MonitoredVm vm) throws MonitorException { |
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StringMonitor jvmCapabilities = |
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(StringMonitor)vm.findByName("sun.rt.jvmCapabilities"); |
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if (jvmCapabilities == null) { |
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return false; |
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} else { |
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return jvmCapabilities.stringValue().charAt(IS_ATTACHABLE) == '1'; |
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} |
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} |
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} |