Package org.springframework.aop.target
Class ThreadLocalTargetSource
- java.lang.Object
- org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
- org.springframework.aop.target.AbstractPrototypeBasedTargetSource
- org.springframework.aop.target.ThreadLocalTargetSource
- All Implemented Interfaces:
Serializable,ThreadLocalTargetSourceStats,TargetClassAware,TargetSource,Aware,BeanFactoryAware,DisposableBean
public class ThreadLocalTargetSource extends AbstractPrototypeBasedTargetSource implements ThreadLocalTargetSourceStats, DisposableBean
Alternative to an object pool. ThisTargetSourceuses a threading model in which every thread has its own copy of the target. There's no contention for targets. Target object creation is kept to a minimum on the running server.Application code is written as to a normal pool; callers can't assume they will be dealing with the same instance in invocations in different threads. However, state can be relied on during the operations of a single thread: for example, if one caller makes repeated calls on the AOP proxy.
Cleanup of thread-bound objects is performed on BeanFactory destruction, calling their
DisposableBean.destroy()method if available. Be aware that many thread-bound objects can be around until the application actually shuts down.- Author:
- Rod Johnson, Juergen Hoeller, Rob Harrop
- See Also:
ThreadLocalTargetSourceStats,DisposableBean.destroy(), Serialized Form
Field Summary
Fields inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
logger
Constructor Summary
Constructors Constructor Description ThreadLocalTargetSource()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voiddestroy()Dispose of targets if necessary; clear ThreadLocal.intgetHitCount()Return the number of hits that were satisfied by a thread-bound object.intgetInvocationCount()Return the number of client invocations.intgetObjectCount()Return the number of thread-bound objects created.IntroductionAdvisorgetStatsMixin()Return an introduction advisor mixin that allows the AOP proxy to be cast to ThreadLocalInvokerStats.ObjectgetTarget()Implementation of abstract getTarget() method.Methods inherited from class org.springframework.aop.target.AbstractPrototypeBasedTargetSource
destroyPrototypeInstance, newPrototypeInstance, setBeanFactory, writeReplace
Methods inherited from class org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource
copyFrom, equals, getBeanFactory, getTargetBeanName, getTargetClass, hashCode, isStatic, releaseTarget, setTargetBeanName, setTargetClass, toString
Constructor Detail
ThreadLocalTargetSource
public ThreadLocalTargetSource()
Method Detail
getTarget
public Object getTarget() throws BeansException
Implementation of abstract getTarget() method. We look for a target held in a ThreadLocal. If we don't find one, we create one and bind it to the thread. No synchronization is required.- Specified by:
getTargetin interfaceTargetSource- Returns:
- the target object which contains the joinpoint, or
nullif there is no actual target instance - Throws:
BeansException
destroy
public void destroy()
Dispose of targets if necessary; clear ThreadLocal.- Specified by:
destroyin interfaceDisposableBean- See Also:
AbstractPrototypeBasedTargetSource.destroyPrototypeInstance(java.lang.Object)
getInvocationCount
public int getInvocationCount()
Description copied from interface:ThreadLocalTargetSourceStatsReturn the number of client invocations.- Specified by:
getInvocationCountin interfaceThreadLocalTargetSourceStats
getHitCount
public int getHitCount()
Description copied from interface:ThreadLocalTargetSourceStatsReturn the number of hits that were satisfied by a thread-bound object.- Specified by:
getHitCountin interfaceThreadLocalTargetSourceStats
getObjectCount
public int getObjectCount()
Description copied from interface:ThreadLocalTargetSourceStatsReturn the number of thread-bound objects created.- Specified by:
getObjectCountin interfaceThreadLocalTargetSourceStats
getStatsMixin
public IntroductionAdvisor getStatsMixin()
Return an introduction advisor mixin that allows the AOP proxy to be cast to ThreadLocalInvokerStats.