/** Constructs a PrintGCStat object to monitor a remote JVM. */
public PrintGCStat(MBeanServerConnection server) throws IOException {
// Create the platform mxbean proxies
this.rmbean = newPlatformMXBeanProxy(server, RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
this.mmbean = newPlatformMXBeanProxy(server, MEMORY_MXBEAN_NAME, MemoryMXBean.class);
ObjectName poolName = null;
ObjectName gcName = null;
try {
poolName = new ObjectName(MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",*");
gcName = new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
} catch (MalformedObjectNameException e) {
// should not reach here
assert (false);
}
Set<ObjectName> mbeans = server.queryNames(poolName, null);
if (mbeans != null) {
pools = new ArrayList<MemoryPoolMXBean>();
for (ObjectName objName : mbeans) {
MemoryPoolMXBean p =
newPlatformMXBeanProxy(server, objName.getCanonicalName(), MemoryPoolMXBean.class);
pools.add(p);
}
}
mbeans = server.queryNames(gcName, null);
if (mbeans != null) {
gcmbeans = new ArrayList<GarbageCollectorMXBean>();
for (ObjectName objName : mbeans) {
GarbageCollectorMXBean gc =
newPlatformMXBeanProxy(
server, objName.getCanonicalName(), GarbageCollectorMXBean.class);
gcmbeans.add(gc);
}
}
}
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
if (args.length != 4) {
System.err.println("Please provide process id zabbix-host zabbix-port host-guid");
System.exit(-1);
}
String processPid = args[0];
String zabbixHost = args[1];
String zabbixPort = args[2];
String hostGuid = args[3];
VirtualMachine vm = VirtualMachine.attach(processPid);
String connectorAddr =
vm.getAgentProperties().getProperty("com.sun.management.jmxremote.localConnectorAddress");
if (connectorAddr == null) {
String agent =
vm.getSystemProperties().getProperty("java.home")
+ File.separator
+ "lib"
+ File.separator
+ "management-agent.jar";
vm.loadAgent(agent);
connectorAddr =
vm.getAgentProperties().getProperty("com.sun.management.jmxremote.localConnectorAddress");
}
JMXServiceURL serviceURL = new JMXServiceURL(connectorAddr);
JMXConnector connector = JMXConnectorFactory.connect(serviceURL);
MBeanServerConnection mbsc = connector.getMBeanServerConnection();
ObjectName objName = new ObjectName(ManagementFactory.THREAD_MXBEAN_NAME);
Set<ObjectName> mbeans = mbsc.queryNames(objName, null);
for (ObjectName name : mbeans) {
ThreadMXBean threadBean;
threadBean =
ManagementFactory.newPlatformMXBeanProxy(mbsc, name.toString(), ThreadMXBean.class);
long threadIds[] = threadBean.getAllThreadIds();
for (long threadId : threadIds) {
ThreadInfo threadInfo = threadBean.getThreadInfo(threadId);
System.out.println(threadInfo.getThreadName() + " / " + threadInfo.getThreadState());
}
}
}
private Object getAttribute(ObjectName objName, String attrName)
throws MBeanException, InstanceNotFoundException, AttributeNotFoundException,
ReflectionException, IOException {
final NameValueMap values = getCachedAttributes(objName, Collections.singleton(attrName));
Object value = values.get(attrName);
if (value != null || values.containsKey(attrName)) {
return value;
}
// Not in cache, presumably because it was omitted from the
// getAttributes result because of an exception. Following
// call will probably provoke the same exception.
return conn.getAttribute(objName, attrName);
}
private synchronized NameValueMap getCachedAttributes(ObjectName objName, Set<String> attrNames)
throws InstanceNotFoundException, ReflectionException, IOException {
NameValueMap values = cachedValues.get(objName);
if (values != null && values.keySet().containsAll(attrNames)) {
return values;
}
attrNames = new TreeSet<String>(attrNames);
Set<String> oldNames = cachedNames.get(objName);
if (oldNames != null) {
attrNames.addAll(oldNames);
}
values = new NameValueMap();
final AttributeList attrs =
conn.getAttributes(objName, attrNames.toArray(new String[attrNames.size()]));
for (Attribute attr : attrs.asList()) {
values.put(attr.getName(), attr.getValue());
}
cachedValues.put(objName, values);
cachedNames.put(objName, attrNames);
return values;
}
