/* ManagementFactory.java - Factory for obtaining system beans. Copyright (C) 2006 Free Software Foundation This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package java.lang.management; import gnu.classpath.SystemProperties; import gnu.java.lang.management.ClassLoadingMXBeanImpl; import gnu.java.lang.management.CompilationMXBeanImpl; import gnu.java.lang.management.GarbageCollectorMXBeanImpl; import gnu.java.lang.management.OperatingSystemMXBeanImpl; import gnu.java.lang.management.MemoryMXBeanImpl; import gnu.java.lang.management.MemoryManagerMXBeanImpl; import gnu.java.lang.management.MemoryPoolMXBeanImpl; import gnu.java.lang.management.RuntimeMXBeanImpl; import gnu.java.lang.management.ThreadMXBeanImpl; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.logging.LogManager; import javax.management.InstanceAlreadyExistsException; import javax.management.MBeanRegistrationException; import javax.management.MBeanServer; import javax.management.MBeanServerFactory; import javax.management.MalformedObjectNameException; import javax.management.NotCompliantMBeanException; import javax.management.ObjectName; /** *
* Provides access to the system's management beans via a series * of static methods. *
** An instance of a system management bean can be obtained by * using one of the following methods: *
*
* The data types used by the management beans are restricted
* to
Data Type Used | Data Type Returned | *
Primitive types (int , char , etc.) |
* Same | *
Wrapper classes ({@link{java.lang.Integer}, * @link{java.lang.Character}, etc.) | *Same | *
An {@link java.lang.Enum} | *The name of the enumeration constant |
*
An array of type E |
* An array of the same dimensions with this mapping applied
* to E . |
*
A class with `getter' methods and a
* from({@link javax.management.openmbean.CompositeData})
* method. |
* The equivalent {@link javax.management.openmbean.CompositeData}
* instance, specified by the from method. |
*
A map with keys of type K and values of
* type V . |
* A {@link javax.management.openmbean.TabularData} instance,
* with the row type containing two items, "key" and
* "value" with the types K and V
* respectively (with translation applied). |
*
A list of type E . |
* An array with this mapping applied to E . |
*
null
.
*
* @return an instance of {@link CompilationMXBean} for
* this virtual machine, or null
* if the virtual machine doesn't include
* a Just-In-Time (JIT) compiler.
*/
public static CompilationMXBean getCompilationMXBean()
{
if (compilationBean == null &&
SystemProperties.getProperty("gnu.java.compiler.name") != null)
try
{
compilationBean = new CompilationMXBeanImpl();
}
catch (NotCompliantMBeanException e)
{
throw new InternalError("The GNU implementation of the " +
"compilation bean is not a compliant " +
"management bean.");
}
return compilationBean;
}
/**
* Returns the memory pool beans for the running
* virtual machine. These may change during the course
* of execution.
*
* @return a list of memory pool beans, one for each pool.
*/
public static List getMemoryPoolMXBeans()
{
List poolBeans = new ArrayList();
String[] names = VMManagementFactory.getMemoryPoolNames();
for (int a = 0; a < names.length; ++a)
try
{
poolBeans.add(new MemoryPoolMXBeanImpl(names[a]));
}
catch (NotCompliantMBeanException e)
{
throw new InternalError("The GNU implementation of the " +
"memory pool bean, " + a + ", is " +
"not a compliant management bean.");
}
return poolBeans;
}
/**
* Returns the memory manager beans for the running
* virtual machine. These may change during the course
* of execution.
*
* @return a list of memory manager beans, one for each manager.
*/
public static List getMemoryManagerMXBeans()
{
List managerBeans = new ArrayList();
String[] names = VMManagementFactory.getMemoryManagerNames();
for (int a = 0; a < names.length; ++a)
try
{
managerBeans.add(new MemoryManagerMXBeanImpl(names[a]));
}
catch (NotCompliantMBeanException e)
{
throw new InternalError("The GNU implementation of the " +
"memory manager bean, " + a + ", is " +
"not a compliant management bean.");
}
managerBeans.addAll(getGarbageCollectorMXBeans());
return managerBeans;
}
/**
* Returns the garbage collector beans for the running
* virtual machine. These may change during the course
* of execution.
*
* @return a list of garbage collector beans, one for each pool.
*/
public static List getGarbageCollectorMXBeans()
{
List gcBeans = new ArrayList();
String[] names = VMManagementFactory.getGarbageCollectorNames();
for (int a = 0; a < names.length; ++a)
try
{
gcBeans.add(new GarbageCollectorMXBeanImpl(names[a]));
}
catch (NotCompliantMBeanException e)
{
throw new InternalError("The GNU implementation of the " +
"garbage collector bean, " + a +
", is not a compliant management " +
"bean.");
}
return gcBeans;
}
/**
*
* Returns the platform {@link javax.management.MBeanServer}. On the
* first call to this method, a server instance is retrieved from
* the {@link javax.management.MBeanServerFactory} and each of the
* beans are registered with it. Subsequent calls return the existing
* instance. If the property javax.management.builder.initial
* is set, its value will be used as the name of the class which is used
* to provide the server instance.
*
* It is recommended that the platform server is used for other beans as * well, in order to simplify their discovery and publication. Name conflicts * should be avoided. *
* * @return the platform {@link javax.management.MBeanServer} * @throws SecurityException if a security manager exists and the * caller's permissions don't imply {@link * MBeanServerPermission(String)}("createMBeanServer") * @see javax.management.MBeanServerFactory * @see javax.management.MBeanServerFactory#createMBeanServer() */ public static MBeanServer getPlatformMBeanServer() { if (platformServer == null) { platformServer = MBeanServerFactory.createMBeanServer(); try { platformServer.registerMBean(getOperatingSystemMXBean(), new ObjectName(OPERATING_SYSTEM_MXBEAN_NAME)); platformServer.registerMBean(getRuntimeMXBean(), new ObjectName(RUNTIME_MXBEAN_NAME)); platformServer.registerMBean(getClassLoadingMXBean(), new ObjectName(CLASS_LOADING_MXBEAN_NAME)); platformServer.registerMBean(getThreadMXBean(), new ObjectName(THREAD_MXBEAN_NAME)); platformServer.registerMBean(getMemoryMXBean(), new ObjectName(MEMORY_MXBEAN_NAME)); CompilationMXBean compBean = getCompilationMXBean(); if (compBean != null) platformServer.registerMBean(compBean, new ObjectName(COMPILATION_MXBEAN_NAME)); Iterator beans = getMemoryPoolMXBeans().iterator(); while (beans.hasNext()) { MemoryPoolMXBean bean = (MemoryPoolMXBean) beans.next(); platformServer.registerMBean(bean, new ObjectName(MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",name=" + bean.getName())); } beans = getMemoryManagerMXBeans().iterator(); while (beans.hasNext()) { MemoryManagerMXBean bean = (MemoryManagerMXBean) beans.next(); platformServer.registerMBean(bean, new ObjectName(MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE + ",name=" + bean.getName())); } beans = getGarbageCollectorMXBeans().iterator(); while (beans.hasNext()) { GarbageCollectorMXBean bean = (GarbageCollectorMXBean) beans.next(); platformServer.registerMBean(bean, new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",name=" + bean.getName())); } platformServer.registerMBean(LogManager.getLoggingMXBean(), new ObjectName(LogManager.LOGGING_MXBEAN_NAME)); } catch (InstanceAlreadyExistsException e) { throw (Error) (new InternalError("One of the management beans is " + "already registered.").initCause(e)); } catch (MBeanRegistrationException e) { throw (Error) (new InternalError("One of the management beans' preRegister " + "methods threw an exception.").initCause(e)); } catch (NotCompliantMBeanException e) { throw (Error) (new InternalError("One of the management beans is " + "not compliant.").initCause(e)); } catch (MalformedObjectNameException e) { throw (Error) (new InternalError("The object name of a management bean is " + "not compliant.").initCause(e)); } } return platformServer; } }