Use AdminClient to query the MBean ObjectNames. After
you get the AdminClient instance, you can call queryNames to get a
list of MBean ObjectNames depending on your query string. To get all
the ObjectNames, you can use the following example code. If you have
a specified query string, you get a subset of ObjectNames.javax.management.ObjectName on = new javax.management.ObjectName("WebSphere:*");
Set objectNameSet= ac.queryNames(on, null);
// Check properties like type, name, and process to find a specified ObjectName
After you get all the ObjectNames, you can use the following
example code to get all the node names:HashSet nodeSet = new HashSet();
for(Iterator i = objectNameSet.iterator(); i.hasNext(); on = (ObjectName)i.next()) {
String type = on.getKeyProperty("type");
if(type != null && type.equals("Server")) {
nodeSet.add(servers[i].getKeyProperty("node"));
}
}
Note: This only returns nodes that are started.
To
list running servers on the node, you can either check the node name
and type for all the ObjectNames or use the following example code:StringBuffer oNameQuery= new StringBuffer(41);
oNameQuery.append("WebSphere:*");
oNameQuery.append(",type=").append("Server");
oNameQuery.append(",node=").append(mynode);
oSet= ac.queryNames(new ObjectName(oNameQuery.toString()), null);
Iterator i = objectNameSet.iterator ();
while (i.hasNext ()) {
on=(objectName) i.next();
String process= on[i].getKeyProperty("process");
serversArrayList.add(process);
}
Invoke operations on PerfMBean through the AdminClient. After you get the PerfMBean(s) in the application server from
which you want to get PMI data, you can invoke the following operations
on the PerfMBean through AdminClient API: // setStatisticSet: Enable PMI data using the pre-defined statistic sets.
Object[] params =
new Object[] { com.ibm.websphere.pmi.stat.StatConstants.STATISTIC_SET_EXTENDED};
String[] signature = new String[] {"java.lang.String"};
ac.invoke (perfOName, "setStatisticSet", params, signature);
// getStatisticSet: Returns the current statistic set.
String setname = (String) ac.invoke (perfOName, "getStatisticSet", null, null);
// setCustomSetString: Customizing PMI data that is enabled using fine-grained control.
// This method allows to enable or disable statistics selectively. The format of the custom
// set specification string is STATS_NAME=ID1,ID2,ID3 seperated by ':', where STATS_NAME
//and IDs are defined in WS*Stat interfaces in com.ibm.websphere.pmi.stat package.
params[0] = new String (WSJVMStats.NAME + "=" + WSJVMStats.HeapSize);
params[1] = new Boolean (false);
signature = new String[] {"java.lang.String", "java.lang.Boolean"};
ac.invoke (perfOName, "setCustomSetString", params, signature);
// Note: Statistics that are not listed in the set string are not changed.
// getCustomSetString: Returns the current custom set specification as a string
String setstring = (String) ac.invoke (perfOName, "getCustomSetString", null, null);
// setInstrumentationLevel: set the instrumentation level
params[0] = new MBeanLevelSpec(objectName, new int[]{WSJVMStats.HEAPSIZE});
params[1] = new Boolean(true);
signature =
new String[]{ "com.ibm.websphere.pmi.stat.MBeanLevelSpec", "java.lang.Boolean"};
ac.invoke(perfOName, "setInstrumentationLevel", params, signature);
// getInstrumentationLevel: get the instrumentation level
params[0] = objectName;
params[1] = new Boolean(recursive);
String[] signature= new String[]{ "javax.management.ObjectName", "java.lang.Boolean"};
MBeanLevelSpec[] mlss = (MBeanLevelSpec[])ac.invoke(perfOName,
"getInstrumentationLevel", params, signature);
// setInstrumentationLevel: set the instrumentation level (deprecated in V6.0)
params[0] = new MBeanLevelSpec(objectName, optionalSD, level);
params[1] = new Boolean(true);
signature = new String[]{ "com.ibm.websphere.pmi.stat.MBeanLevelSpec", "java.lang.Boolean"};
ac.invoke(perfOName, "setInstrumentationLevel", params, signature);
// getInstrumentationLevel: get the instrumentation level (deprecated in V6.0)
Object[] params = new Object[2];
params[0] = new MBeanStatDescriptor(objectName, optionalSD);
params[1] = new Boolean(recursive);
String[] signature= new String[]{
"com.ibm.websphere.pmi.stat.MBeanStatDescriptor", "java.lang.Boolean"};
MBeanLevelSpec[] mlss = (MBeanLevelSpec[])ac.invoke(perfOName,
"getInstrumentationLevel", params, signature);
// getConfigs: get PMI static config info for all the MBeans
configs = (PmiModuleConfig[])ac.invoke(perfOName, "getConfigs", null, null);
// getConfig: get PMI static config info for a specific MBean
ObjectName[] params = {objectName};
String[] signature= { "javax.management.ObjectName" };
config = (PmiModuleConfig)ac.invoke(perfOName, "getConfig", params, signature);
// getStatsObject: you can use either ObjectName or MBeanStatDescriptor
Object[] params = new Object[2];
params[0] = objectName; // either ObjectName or or MBeanStatDescriptor
params[1] = new Boolean(recursive);
String[] signature =
new String[] { "javax.management.ObjectName", "java.lang.Boolean"};
Stats stats = (Stats)ac.invoke(perfOName, "getStatsObject", params, signature);
// Note: The returned data only have dynamic information (value and time stamp).
// See PmiJmxTest.java for additional code to link the configuration information with the
// returned data.
// getStatsArray: you can use either ObjectName or MBeanStatDescriptor
ObjectName[] onames = new ObjectName[]{objectName1, objectName2};
Object[] params = new Object[]{onames, new Boolean(true)};
String[] signature =
new String[]{"[Ljavax.management.ObjectName;", "java.lang.Boolean"};
Stats[] statsArray =
(Stats[])ac.invoke(perfOName, "getStatsArray", params, signature);
// Note: The returned data only have dynamic information (value and time stamp).
// See PmiJmxTest.java for additional code to link the configuration information with the
// returned data.
// listStatMembers: navigate the PMI module trees
Object[] params = new Object[]{mName};
String[] signature= new String[]{"javax.management.ObjectName"};
MBeanStatDescriptor[] msds = (MBeanStatDescriptor[])ac.invoke(perfOName,
"listStatMembers", params, signature);
//or,
// Object[] params = new Object[]{mbeanSD};
// String[] signature= new String[]{"com.ibm.websphere.pmi.stat.MBeanStatDescriptor"};
// MBeanStatDescriptor[] msds = (MBeanStatDescriptor[])ac.invoke
// (perfOName, "listStatMembers", params, signature);
// Refer to the API documentation for deprecated classes
- To use an individual MBean: You need to get the AdminClient
instance and the ObjectName for the individual MBean. Then you can
simply get the Stats attribute on the MBean.