public static void main(String[] args) throws IOException {
JMXServiceURL address =
new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:1234/jmxrmi");
JMXConnector connector = JMXConnectorFactory.connect(address);
MBeanServerConnection msc = connector.getMBeanServerConnection();
HotSpotDiagnosticMXBean hotspot =
ManagementFactory.newPlatformMXBeanProxy(
msc, "com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class);
hotspot.dumpHeap("out.txt", true);
}
public static <T> T getRemoteBean(
Class<T> clazz, String mbeanName, IConfiguration config, boolean mxbean) {
try {
if (mxbean)
return ManagementFactory.newPlatformMXBeanProxy(
JMXNodeTool.instance(config).mbeanServerConn, mbeanName, clazz);
else
return JMX.newMBeanProxy(
JMXNodeTool.instance(config).mbeanServerConn, new ObjectName(mbeanName), clazz);
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
return null;
}
public static JSONObject geGCInfo(String app) throws Exception {
ObjectName obj = new ObjectName("java.lang:type=GarbageCollector,*");
MBeanServer conn = ManagementFactory.getPlatformMBeanServer();
Set<ObjectInstance> MBeanset = conn.queryMBeans(obj, null);
Class<GarbageCollectorMXBean> cls = GarbageCollectorMXBean.class;
JSONObject data = new JSONObject();
for (ObjectInstance objx : MBeanset) {
String name = objx.getObjectName().getCanonicalName();
String keyName = objx.getObjectName().getKeyProperty("name");
GarbageCollectorMXBean gc = ManagementFactory.newPlatformMXBeanProxy(conn, name, cls);
data.put(keyName + "-time", gc.getCollectionTime() / 1000.0);
data.put(keyName + "-count", gc.getCollectionCount());
}
return data;
}
static void MonitorGC(long h) {
handle = h;
List<GarbageCollectorMXBean> gcbeans =
java.lang.management.ManagementFactory.getGarbageCollectorMXBeans();
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
try {
ObjectName gcName =
new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
for (ObjectName name : server.queryNames(gcName, null)) {
GarbageCollectorMXBean gc =
ManagementFactory.newPlatformMXBeanProxy(
server, name.getCanonicalName(), GarbageCollectorMXBean.class);
gcbeans.add(gc);
NotificationEmitter emitter = (NotificationEmitter) gc;
NotificationListener listener =
new NotificationListener() {
@Override
public void handleNotification(Notification notification, Object handback) {
if (notification
.getType()
.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
CompositeData ndata = (CompositeData) notification.getUserData();
GarbageCollectionNotificationInfo info =
GarbageCollectionNotificationInfo.from(ndata);
boolean major = "end of major GC".equals(info.getGcAction());
long free = Runtime.getRuntime().freeMemory();
long total = Runtime.getRuntime().totalMemory();
long qty = (15 * total) - (free * 100);
if (qty > 0) {
NotifyOSv(handle, qty);
}
}
}
};
emitter.addNotificationListener(listener, null, null);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
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());
}
}
}
/**
* @param args the command line arguments: must be -url <jmx-url>, or -port <port-number> [-host
* <host-or-ip], or -pid <pid>, or -help
*/
public static void main(String[] args) throws Exception {
// Parse arguments.
final ConnectionArgs cArgs = new ConnectionArgs(args);
// Get target's URL
final JMXServiceURL target = cArgs.getJMXServiceURL();
// Connect to target (assuming no security)
final JMXConnector connector = JMXConnectorFactory.connect(target);
// Get an MBeanServerConnection on the remote VM.
final MBeanServerConnection remote = connector.getMBeanServerConnection();
final RuntimeMXBean remoteRuntime =
ManagementFactory.newPlatformMXBeanProxy(
remote, ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
System.out.println("Target VM is: " + remoteRuntime.getName());
System.out.println("Started since: " + remoteRuntime.getUptime());
System.out.println("With Classpath: " + remoteRuntime.getClassPath());
System.out.println("And args: " + remoteRuntime.getInputArguments());
connector.close();
}
public GCInspector() {
// we only want this class to do its thing on sun jdks, or when the sun classes are present.
Class<?> gcBeanClass = null;
try {
gcBeanClass = Class.forName("com.sun.management.GarbageCollectorMXBean");
Class.forName("com.sun.management.GcInfo");
} catch (ClassNotFoundException ex) {
// this happens when using a non-sun jdk.
logger.warn("Cannot load sun GC monitoring classes. GCInspector is disabled.");
}
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
try {
ObjectName gcName =
new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
for (ObjectName name : server.queryNames(gcName, null)) {
Object gc =
ManagementFactory.newPlatformMXBeanProxy(server, name.getCanonicalName(), gcBeanClass);
beans.add(gc);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Initialize constants and try to collect information about the JVM internals. */
static {
// Initialize empirically measured defaults. We'll modify them to the current
// JVM settings later on if possible.
int referenceSize = Constants.JRE_IS_64BIT ? 8 : 4;
int objectHeader = Constants.JRE_IS_64BIT ? 16 : 8;
// The following is objectHeader + NUM_BYTES_INT, but aligned (object alignment)
// so on 64 bit JVMs it'll be align(16 + 4, @8) = 24.
int arrayHeader = Constants.JRE_IS_64BIT ? 24 : 12;
supportedFeatures = EnumSet.noneOf(JvmFeature.class);
Class<?> unsafeClass = null;
Object tempTheUnsafe = null;
try {
unsafeClass = Class.forName("sun.misc.Unsafe");
final Field unsafeField = unsafeClass.getDeclaredField("theUnsafe");
unsafeField.setAccessible(true);
tempTheUnsafe = unsafeField.get(null);
} catch (Exception e) {
// Ignore.
}
theUnsafe = tempTheUnsafe;
// get object reference size by getting scale factor of Object[] arrays:
try {
final Method arrayIndexScaleM = unsafeClass.getMethod("arrayIndexScale", Class.class);
referenceSize = ((Number) arrayIndexScaleM.invoke(theUnsafe, Object[].class)).intValue();
supportedFeatures.add(JvmFeature.OBJECT_REFERENCE_SIZE);
} catch (Exception e) {
// ignore.
}
// "best guess" based on reference size. We will attempt to modify
// these to exact values if there is supported infrastructure.
objectHeader = Constants.JRE_IS_64BIT ? (8 + referenceSize) : 8;
arrayHeader = Constants.JRE_IS_64BIT ? (8 + 2 * referenceSize) : 12;
// get the object header size:
// - first try out if the field offsets are not scaled (see warning in Unsafe docs)
// - get the object header size by getting the field offset of the first field of a dummy object
// If the scaling is byte-wise and unsafe is available, enable dynamic size measurement for
// estimateRamUsage().
Method tempObjectFieldOffsetMethod = null;
try {
final Method objectFieldOffsetM = unsafeClass.getMethod("objectFieldOffset", Field.class);
final Field dummy1Field = DummyTwoLongObject.class.getDeclaredField("dummy1");
final int ofs1 = ((Number) objectFieldOffsetM.invoke(theUnsafe, dummy1Field)).intValue();
final Field dummy2Field = DummyTwoLongObject.class.getDeclaredField("dummy2");
final int ofs2 = ((Number) objectFieldOffsetM.invoke(theUnsafe, dummy2Field)).intValue();
if (Math.abs(ofs2 - ofs1) == NUM_BYTES_LONG) {
final Field baseField = DummyOneFieldObject.class.getDeclaredField("base");
objectHeader = ((Number) objectFieldOffsetM.invoke(theUnsafe, baseField)).intValue();
supportedFeatures.add(JvmFeature.FIELD_OFFSETS);
tempObjectFieldOffsetMethod = objectFieldOffsetM;
}
} catch (Exception e) {
// Ignore.
}
objectFieldOffsetMethod = tempObjectFieldOffsetMethod;
// Get the array header size by retrieving the array base offset
// (offset of the first element of an array).
try {
final Method arrayBaseOffsetM = unsafeClass.getMethod("arrayBaseOffset", Class.class);
// we calculate that only for byte[] arrays, it's actually the same for all types:
arrayHeader = ((Number) arrayBaseOffsetM.invoke(theUnsafe, byte[].class)).intValue();
supportedFeatures.add(JvmFeature.ARRAY_HEADER_SIZE);
} catch (Exception e) {
// Ignore.
}
NUM_BYTES_OBJECT_REF = referenceSize;
NUM_BYTES_OBJECT_HEADER = objectHeader;
NUM_BYTES_ARRAY_HEADER = arrayHeader;
// Try to get the object alignment (the default seems to be 8 on Hotspot,
// regardless of the architecture).
int objectAlignment = 8;
try {
final Class<?> beanClazz = Class.forName("com.sun.management.HotSpotDiagnosticMXBean");
// Try to get the diagnostic mxbean without calling {@link
// ManagementFactory#getPlatformMBeanServer()}
// which starts AWT thread (and shows junk in the dock) on a Mac:
Object hotSpotBean;
// Java 7+, HotSpot
try {
hotSpotBean =
ManagementFactory.class
.getMethod("getPlatformMXBean", Class.class)
.invoke(null, beanClazz);
} catch (Exception e1) {
// Java 6, HotSpot
try {
Class<?> sunMF = Class.forName("sun.management.ManagementFactory");
hotSpotBean = sunMF.getMethod("getDiagnosticMXBean").invoke(null);
} catch (Exception e2) {
// Last resort option is an attempt to get it from ManagementFactory's server anyway (may
// start AWT).
hotSpotBean =
ManagementFactory.newPlatformMXBeanProxy(
ManagementFactory.getPlatformMBeanServer(),
"com.sun.management:type=HotSpotDiagnostic",
beanClazz);
}
}
if (hotSpotBean != null) {
final Method getVMOptionMethod = beanClazz.getMethod("getVMOption", String.class);
final Object vmOption = getVMOptionMethod.invoke(hotSpotBean, "ObjectAlignmentInBytes");
objectAlignment =
Integer.parseInt(vmOption.getClass().getMethod("getValue").invoke(vmOption).toString());
supportedFeatures.add(JvmFeature.OBJECT_ALIGNMENT);
}
} catch (Exception e) {
// Ignore.
}
NUM_BYTES_OBJECT_ALIGNMENT = objectAlignment;
JVM_INFO_STRING =
"[JVM: "
+ Constants.JVM_NAME
+ ", "
+ Constants.JVM_VERSION
+ ", "
+ Constants.JVM_VENDOR
+ ", "
+ Constants.JAVA_VENDOR
+ ", "
+ Constants.JAVA_VERSION
+ "]";
}
