org.springframework.ejb.access

类 SimpleRemoteSlsbInvokerInterceptor

java.lang.Object

org.springframework.jndi.JndiAccessor

org.springframework.jndi.JndiLocatorSupport

org.springframework.jndi.JndiObjectLocator

org.springframework.ejb.access.AbstractSlsbInvokerInterceptor

org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor

org.springframework.ejb.access.SimpleRemoteSlsbInvokerInterceptor

所有已实现的接口:

org.aopalliance.aop.Advice, org.aopalliance.intercept.Interceptor, org.aopalliance.intercept.MethodInterceptor, org.springframework.beans.factory.DisposableBean, org.springframework.beans.factory.InitializingBean

直接已知子类:

SimpleRemoteStatelessSessionProxyFactoryBean

public class SimpleRemoteSlsbInvokerInterceptor
extends AbstractRemoteSlsbInvokerInterceptor
implements org.springframework.beans.factory.DisposableBean

Basic invoker for a remote Stateless Session Bean. Designed for EJB 2.x, but works for EJB 3 Session Beans as well.

"Creates" a new EJB instance for each invocation, or caches the session bean instance for all invocations (see setCacheSessionBean(boolean)). See JndiObjectLocator for info on how to specify the JNDI location of the target EJB.

In a bean container, this class is normally best used as a singleton. However, if that bean container pre-instantiates singletons (as do the XML ApplicationContext variants) you may have a problem if the bean container is loaded before the EJB container loads the target EJB. That is because by default the JNDI lookup will be performed in the init method of this class and cached, but the EJB will not have been bound at the target location yet. The best solution is to set the "lookupHomeOnStartup" property to "false", in which case the home will be fetched on first access to the EJB. (This flag is only true by default for backwards compatibility reasons).

This invoker is typically used with an RMI business interface, which serves as super-interface of the EJB component interface. Alternatively, this invoker can also proxy a remote SLSB with a matching non-RMI business interface, i.e. an interface that mirrors the EJB business methods but does not declare RemoteExceptions. In the latter case, RemoteExceptions thrown by the EJB stub will automatically get converted to Spring's unchecked RemoteAccessException.

从以下版本开始:

09.05.2003

作者:

Rod Johnson, Juergen Hoeller

另请参阅:

RemoteAccessException, AbstractSlsbInvokerInterceptor.setLookupHomeOnStartup(boolean), AbstractSlsbInvokerInterceptor.setCacheHome(boolean), AbstractRemoteSlsbInvokerInterceptor.setRefreshHomeOnConnectFailure(boolean)

字段概要

从类继承的字段 org.springframework.jndi.JndiLocatorSupport

CONTAINER_PREFIX

从类继承的字段 org.springframework.jndi.JndiAccessor

logger

构造器概要

构造器

构造器和说明
SimpleRemoteSlsbInvokerInterceptor()

方法概要

限定符和类型	方法和说明
void	destroy() Remove the cached session bean instance, if necessary.
protected Object	doInvoke(org.aopalliance.intercept.MethodInvocation invocation) This implementation "creates" a new EJB instance for each invocation.
protected Object	getSessionBeanInstance() Return an EJB component instance to delegate the call to.
protected void	refreshHome() Reset the cached session bean instance, if necessary.
protected void	releaseSessionBeanInstance(EJBObject ejb) Release the given EJB instance.
void	setCacheSessionBean(boolean cacheSessionBean) Set whether to cache the actual session bean object.

从类继承的方法 org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor

getCreateMethod, invokeInContext, isConnectFailure, isHomeRefreshable, newSessionBeanInstance, refreshAndRetry, removeSessionBeanInstance, setRefreshHomeOnConnectFailure

从类继承的方法 org.springframework.ejb.access.AbstractSlsbInvokerInterceptor

afterPropertiesSet, create, getHome, invoke, setCacheHome, setExposeAccessContext, setLookupHomeOnStartup

从类继承的方法 org.springframework.jndi.JndiObjectLocator

getExpectedType, getJndiName, lookup, setExpectedType, setJndiName

从类继承的方法 org.springframework.jndi.JndiLocatorSupport

convertJndiName, isResourceRef, lookup, lookup, setResourceRef

从类继承的方法 org.springframework.jndi.JndiAccessor

getJndiEnvironment, getJndiTemplate, setJndiEnvironment, setJndiTemplate

从类继承的方法 java.lang.Object

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

构造器详细资料

SimpleRemoteSlsbInvokerInterceptor

public SimpleRemoteSlsbInvokerInterceptor()

方法详细资料

setCacheSessionBean

public void setCacheSessionBean(boolean cacheSessionBean)

Set whether to cache the actual session bean object.

Off by default for standard EJB compliance. Turn this flag on to optimize session bean access for servers that are known to allow for caching the actual session bean object.

另请参阅:

AbstractSlsbInvokerInterceptor.setCacheHome(boolean)

doInvoke

@Nullable
protected Object doInvoke(org.aopalliance.intercept.MethodInvocation invocation)
                              throws Throwable

This implementation "creates" a new EJB instance for each invocation. Can be overridden for custom invocation strategies.

Alternatively, override getSessionBeanInstance() and releaseSessionBeanInstance(javax.ejb.EJBObject) to change EJB instance creation, for example to hold a single shared EJB component instance.

指定者:

doInvoke 在类中 AbstractRemoteSlsbInvokerInterceptor

参数:

invocation - the AOP method invocation

返回:

the invocation result, if any

抛出:

Throwable - in case of invocation failure

另请参阅:

AbstractSlsbInvokerInterceptor.getHome(), AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance()

getSessionBeanInstance

protected Object getSessionBeanInstance()
                                 throws NamingException,
                                        InvocationTargetException

Return an EJB component instance to delegate the call to.

The default implementation delegates to AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance().

返回:

the EJB component instance

抛出:

NamingException - if thrown by JNDI

InvocationTargetException - if thrown by the create method

另请参阅:

AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance()

releaseSessionBeanInstance

protected void releaseSessionBeanInstance(EJBObject ejb)

Release the given EJB instance.

The default implementation delegates to AbstractRemoteSlsbInvokerInterceptor.removeSessionBeanInstance(javax.ejb.EJBObject).

参数:

ejb - the EJB component instance to release

另请参阅:

AbstractRemoteSlsbInvokerInterceptor.removeSessionBeanInstance(javax.ejb.EJBObject)

refreshHome

protected void refreshHome()
                    throws NamingException

Reset the cached session bean instance, if necessary.

覆盖:

refreshHome 在类中 AbstractSlsbInvokerInterceptor

抛出:

NamingException - if thrown by the JNDI lookup

另请参阅:

JndiObjectLocator.lookup(), AbstractSlsbInvokerInterceptor.getCreateMethod(java.lang.Object)

destroy

public void destroy()

Remove the cached session bean instance, if necessary.

指定者:

destroy 在接口中 org.springframework.beans.factory.DisposableBean