| /* |
| * Copyright (c) 2004, 2011, 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.monitor; |
| |
| /** |
| * Utility class proving concenience methods for extracting various |
| * information from an MonitoredVm object. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class MonitoredVmUtil { |
| |
| /** |
| * Private constructor - prevent instantiation. |
| */ |
| private MonitoredVmUtil() { } |
| |
| /** |
| * Return the Java Virtual Machine Version. |
| * |
| * @param vm the target MonitoredVm |
| * @return String - contains the version of the target JVM or the |
| * the string "Unknown" if the version cannot be |
| * determined. |
| */ |
| public static String vmVersion(MonitoredVm vm) throws MonitorException { |
| StringMonitor ver = |
| (StringMonitor)vm.findByName("java.property.java.vm.version"); |
| return (ver == null) ? "Unknown" : ver.stringValue(); |
| } |
| |
| /** |
| * Return the command line for the target Java application. |
| * |
| * @param vm the target MonitoredVm |
| * @return String - contains the command line of the target Java |
| * application or the the string "Unknown" if the |
| * command line cannot be determined. |
| */ |
| public static String commandLine(MonitoredVm vm) throws MonitorException { |
| StringMonitor cmd = (StringMonitor)vm.findByName("sun.rt.javaCommand"); |
| return (cmd == null) ? "Unknown" : cmd.stringValue(); |
| } |
| |
| /** |
| * Return the arguments to the main class for the target Java application. |
| * Returns the arguments to the main class. If the arguments can't be |
| * found, the string "Unknown" is returned. |
| * |
| * @param vm the target MonitoredVm |
| * @return String - contains the arguments to the main class for the |
| * target Java application or the the string "Unknown" |
| * if the command line cannot be determined. |
| */ |
| public static String mainArgs(MonitoredVm vm) throws MonitorException { |
| String commandLine = commandLine(vm); |
| |
| int firstSpace = commandLine.indexOf(' '); |
| if (firstSpace > 0) { |
| return commandLine.substring(firstSpace + 1); |
| } else if (commandLine.compareTo("Unknown") == 0) { |
| return commandLine; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Return the main class for the target Java application. |
| * Returns the main class or the name of the jar file if the application |
| * was started with the <em>-jar</em> option. |
| * |
| * @param vm the target MonitoredVm |
| * @param fullPath include the full path to Jar file, where applicable |
| * @return String - contains the main class of the target Java |
| * application or the the string "Unknown" if the |
| * command line cannot be determined. |
| */ |
| public static String mainClass(MonitoredVm vm, boolean fullPath) |
| throws MonitorException { |
| String commandLine = commandLine(vm); |
| String arg0 = commandLine; |
| |
| int firstSpace = commandLine.indexOf(' '); |
| if (firstSpace > 0) { |
| arg0 = commandLine.substring(0, firstSpace); |
| } |
| if (!fullPath) { |
| /* |
| * can't use File.separator() here because the separator |
| * for the target jvm may be different than the separator |
| * for the monitoring jvm. |
| */ |
| int lastFileSeparator = arg0.lastIndexOf('/'); |
| if (lastFileSeparator > 0) { |
| return arg0.substring(lastFileSeparator + 1); |
| } |
| |
| lastFileSeparator = arg0.lastIndexOf('\\'); |
| if (lastFileSeparator > 0) { |
| return arg0.substring(lastFileSeparator + 1); |
| } |
| |
| int lastPackageSeparator = arg0.lastIndexOf('.'); |
| if (lastPackageSeparator > 0) { |
| return arg0.substring(lastPackageSeparator + 1); |
| } |
| } |
| return arg0; |
| } |
| |
| /** |
| * Return the JVM arguments for the target Java application. |
| * |
| * @param vm the target MonitoredVm |
| * @return String - contains the arguments passed to the JVM for the |
| * target Java application or the the string "Unknown" |
| * if the command line cannot be determined. |
| */ |
| public static String jvmArgs(MonitoredVm vm) throws MonitorException { |
| StringMonitor jvmArgs = (StringMonitor)vm.findByName("java.rt.vmArgs"); |
| return (jvmArgs == null) ? "Unknown" : jvmArgs.stringValue(); |
| } |
| |
| /** |
| * Return the JVM flags for the target Java application. |
| * |
| * @param vm the target MonitoredVm |
| * @return String - contains the flags passed to the JVM for the |
| * target Java application or the the string "Unknown" |
| * if the command line cannot be determined. |
| */ |
| public static String jvmFlags(MonitoredVm vm) throws MonitorException { |
| StringMonitor jvmFlags = |
| (StringMonitor)vm.findByName("java.rt.vmFlags"); |
| return (jvmFlags == null) ? "Unknown" : jvmFlags.stringValue(); |
| } |
| |
| // Index of the sun.rt.jvmCapabilities counter |
| private static int IS_ATTACHABLE = 0; |
| private static int IS_KERNEL_VM = 1; |
| |
| /** |
| * Returns true if the VM supports attach-on-demand. |
| * |
| * @param vm the target MonitoredVm |
| */ |
| public static boolean isAttachable(MonitoredVm vm) throws MonitorException { |
| StringMonitor jvmCapabilities = |
| (StringMonitor)vm.findByName("sun.rt.jvmCapabilities"); |
| if (jvmCapabilities == null) { |
| return false; |
| } else { |
| return jvmCapabilities.stringValue().charAt(IS_ATTACHABLE) == '1'; |
| } |
| } |
| |
| } |