java.lang.management
Interface CompilationMBean

public interface CompilationMBean

The management interface for the compilation system of the Java virtual machine.

A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is a managed bean (MBean) conforming to the JMX Instrumentation Specification. The MBean can be obtained by calling the ManagementFactory.getCompilationMBean() method. An application can monitor the instrumentation of the compilation system and manage certain characteristics in any of the following ways:

• Call the methods of the MBean directly.
• Go through the MBeanServer.
• Construct an MBean proxy and call the methods of the MBean proxy.

The ManagementFactory.getPlatformMBeanServer() method returns the platform MBeanServer registered with all platform MBeans.

The ObjectName for uniquely identifying the MBean for the compilation system within an MBeanServer is:

java.lang:type=Compilation

Since:

1.5

See Also:

Ways to Access Management Metrics

getName

String getName()

Returns the name of the Just-in-time (JIT) compiler.

Returns:

the name of the JIT compiler.

isCompilationTimeMonitoringSupported

boolean isCompilationTimeMonitoringSupported()

Tests if the Java virtual machine supports the monitoring of compilation time.

Returns:

true if the monitoring of compilation time is supported ; false otherwise.

getTotalCompilationTime

long getTotalCompilationTime()

Returns the approximate accumlated elapsed time (in milliseconds) spent in compilation. If multiple threads are used for compilation, this value is summation of the approximate time that each thread spent in compilation.

This method is optionally supported by the platform. A Java virtual machine implementation may not support the compilation time monitoring. The isCompilationTimeMonitoringSupported() method can be used to determine if the Java virtual machine supports this operation.

This value does not indicate the level of performance of the Java virtual machine and is not intended for performance comparisons of different virtual machine implementations. The implementations may have different definitions and different measurements of the compilation time.

Returns:

Compilation time in milliseconds

Throws:

UnsupportedOperationException - if the Java virtual machine does not support this operation.