org.apache.openjpa.enhance

Class PCEnhancerAgent

java.lang.Object

org.apache.openjpa.enhance.PCEnhancerAgent

public class PCEnhancerAgent
extends Object

Java agent that makes persistent classes work with OpenJPA at runtime. This is achieved by either running the enhancer on the classes as they are loaded, or by redefining the classes on the fly. The agent is launched at JVM startup from the command line:

java -javaagent:openjpa.jar[=<options>] The options string should be formatted as a OpenJPA plugin, and may contain any properties understood by the OpenJPA enhancer or any configuration properties. For example:

java -javaagent:openjpa.jar

By default, if specified, the agent runs the OpenJPA enhancer on all classes listed in the first persistence unit as they are loaded, and redefines all other persistent classes when they are encountered. To disable enhancement at class-load time and rely solely on the redefinition logic, set the ClassLoadEnhancement flag to false. To disable redefinition and rely solely on pre-deployment or class-load enhancement, set the RuntimeRedefinition flag to false.

java -javaagent:openjpa.jar=ClassLoadEnhancement=false

Author:

Abe White, Patrick Linskey

Constructor Summary

Constructors

Constructor and Description
PCEnhancerAgent()

Method Summary

Methods

Modifier and Type	Method and Description
static void	disableDynamicAgent()
static boolean	getLoadSuccessful()
static boolean	loadDynamicAgent(Log log)
static void	premain(String args, Instrumentation inst)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PCEnhancerAgent

public PCEnhancerAgent()

Method Detail

getLoadSuccessful

public static boolean getLoadSuccessful()

Returns:

True if the Agent has ran successfully. False otherwise.

disableDynamicAgent

public static void disableDynamicAgent()

loadDynamicAgent

public static boolean loadDynamicAgent(Log log)

Returns:

True if the agent is loaded successfully

premain

public static void premain(String args,
           Instrumentation inst)