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1
23
24
29
30 package com.sun.enterprise.admin.mbeans.jvm;
31
32 import com.sun.enterprise.admin.common.constant.AdminConstants;
33 import com.sun.enterprise.util.i18n.StringManager;
34 import java.lang.management.ManagementFactory  ;
35 import java.lang.management.RuntimeMXBean ;
36 import java.lang.management.ThreadInfo ;
37 import java.lang.management.ThreadMXBean ;
38 import java.util.logging.Logger ;
39 import javax.management.MBeanServerConnection ;
40
41
43 class ThreadMonitor {
44
45 private final MBeanServerConnection mbsc;
46 private static final Logger logger = Logger.getLogger(AdminConstants.kLoggerName);
47 private final StringManager sm = StringManager.getManager(ThreadMonitor.class);
48 public ThreadMonitor(final MBeanServerConnection mbsc) {
49 this.mbsc = mbsc;
50 }
51 public final String getThreadDump() {
52 final long start = System.currentTimeMillis();
53 final StringBuilder sb = new StringBuilder ();
54 final StringBuilderNewLineAppender td = new StringBuilderNewLineAppender(sb);
55 try {
56 final ThreadMXBean tmx = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.THREAD_MXBEAN_NAME, ThreadMXBean .class);
57 final String title = getTitle();
58 td.append(title);
59 final long[] tids = tmx.getAllThreadIds();
60 td.append(sm.getString("thread.no", tmx.getThreadCount()));
61 td.append(sm.getString("daemon.threads.no", tmx.getDaemonThreadCount()));
62 final ThreadInfo [] tinfos = tmx.getThreadInfo(tids, Integer.MAX_VALUE);
63
70 for (final ThreadInfo ti : tinfos) {
71 td.append(dumpThread(ti));
72 }
73 sb.append(getDeadlockInfo(tmx));
74 return ( td.toString() );
75 } catch(final Exception e) {
76 throw new RuntimeException (e);
77 }
78 finally {
79 final long end = System.currentTimeMillis();
80 final double time = (end/1000.0) - (start/1000.0);
81 logger.info("Time in seconds to get the jvm thread dump: " + time);
82 }
83 }
84 private String dumpThread(final ThreadInfo ti) {
85 final long ids = ti.getThreadId();
86 final String ss = ti.getThreadState().toString();
87 String msg = sm.getString("thread.title", quote(ti.getThreadName()), ids, ss);
89 final StringBuilder sb = new StringBuilder (msg);
90 if (ti.getLockName() != null) {
91 msg = sm.getString("thread.waiting.on", ti.getLockName());
92 sb.append(msg);
93 }
94 if (ti.isSuspended()) {
95 msg = sm.getString("thread.suspended");
96 sb.append(msg);
97 }
98 if (ti.isInNative()) {
99 msg = sm.getString("thread.in.native");
100 sb.append(msg);
101 }
102 sb.append(System.getProperty("line.separator"));
103 if (ti.getLockOwnerName() != null) {
104 msg = sm.getString("thread.owner", ti.getLockOwnerName(), ti.getLockOwnerId());
105 sb.append(msg);
106 }
107 for (final StackTraceElement ste : ti.getStackTrace()) {
108 msg = sm.getString("thread.stack.element", ste.toString());
109 sb.append(msg);
110 sb.append(System.getProperty("line.separator"));
111 }
112 sb.append(System.getProperty("line.separator"));
113 return ( sb.toString() );
114 }
115
116 private String getTitle() throws Exception {
117 final RuntimeMXBean rt = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean .class);
118 final String vmname = rt.getVmName();
119 final String vmversion = rt.getVmVersion();
120 final String vmvendor = rt.getVmVendor();
121 final String title = sm.getString("td.title", vmname, vmversion, vmvendor);
122
123 return ( title );
124 }
125
126 private String quote(final String uq) {
127 final StringBuilder sb = new StringBuilder ("\"");
128 sb.append(uq).append("\"");
129 return ( sb.toString() );
130 }
131
132 private String getDeadlockInfo(final ThreadMXBean tmx) {
133 final StringBuilderNewLineAppender sb = new StringBuilderNewLineAppender(new StringBuilder ());
134 final long[] dts = tmx.findMonitorDeadlockedThreads();
135 if (dts == null) {
136 sb.append(sm.getString("no.deadlock"));
137 }
138 else {
139 sb.append(sm.getString("deadlocks.found"));
140 for (final long dt : dts) {
141 final ThreadInfo ti = tmx.getThreadInfo(dt);
142 sb.append(this.dumpThread(ti));
143 }
144 }
145 return ( sb.toString() );
146 }
147 }
148 |
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