EntityInstanceInterceptor (JBoss Server API) - JBoss 4.0.1 sp1 server API Documentation 英文版文档

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org.jboss.ejb.plugins
Class EntityInstanceInterceptor

java.lang.Object
  org.jboss.ejb.plugins.AbstractInterceptor
      org.jboss.ejb.plugins.EntityInstanceInterceptor

All Implemented Interfaces:: AllowedOperationsFlags, ContainerPlugin, Interceptor, org.jboss.system.Service

public class EntityInstanceInterceptor
extends AbstractInterceptor

The instance interceptors role is to acquire a context representing the target object from the cache.

This particular container interceptor implements pessimistic locking on the transaction that is associated with the retrieved instance. If there is a transaction associated with the target component and it is different from the transaction associated with the Invocation coming in then the policy is to wait for transactional commit.

We also implement serialization of calls in here (this is a spec requirement). This is a fine grained notify, notifyAll mechanism. We notify on ctx serialization locks and notifyAll on global transactional locks.

WARNING: critical code, get approval from senior developers before changing.

Version:: $Revision: 1.75.4.1 $
Author:: Marc Fleury, Scott Stark, Bill Burke, Jamie Burns

Field Summary

protected EntityContainer container


protected static Method ejbTimeout
          A reference to TimedObject.ejbTimeout(javax.ejb.Timer).

Fields inherited from class org.jboss.ejb.plugins.AbstractInterceptor

log, nextInterceptor

Fields inherited from interface org.jboss.ejb.AllowedOperationsFlags

IN_AFTER_BEGIN, IN_AFTER_COMPLETION, IN_BEFORE_COMPLETION, IN_BUSINESS_METHOD, IN_EJB_ACTIVATE, IN_EJB_CREATE, IN_EJB_FIND, IN_EJB_HOME, IN_EJB_LOAD, IN_EJB_PASSIVATE, IN_EJB_POST_CREATE, IN_EJB_REMOVE, IN_EJB_STORE, IN_EJB_TIMEOUT, IN_INTERCEPTOR_METHOD, IN_SERVICE_ENDPOINT_METHOD, IN_SET_ENTITY_CONTEXT, IN_SET_MESSAGE_DRIVEN_CONTEXT, IN_SET_SESSION_CONTEXT, IN_UNSET_ENTITY_CONTEXT, NOT_ALLOWED

Constructor Summary

EntityInstanceInterceptor()


Method Summary

Container getContainer()


Object invoke(Invocation mi)
          ???

Object invokeHome(Invocation mi)
          ???

void setContainer(Container container)
          This callback is set by the container so that the plugin may access it

Methods inherited from class org.jboss.ejb.plugins.AbstractInterceptor

create, destroy, getNext, setNext, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

container

protected EntityContainer container

ejbTimeout

protected static final Method ejbTimeout

A reference to TimedObject.ejbTimeout(javax.ejb.Timer).

Constructor Detail