| org.springframework.ejb.access |
|
This package contains classes that allow easy access to EJBs.
The basis are AOP interceptors run before and after the EJB invocation.
In particular, the classes in this package allow transparent access
to stateless session beans (SLSBs) with local interfaces, avoiding
the need for application code using them to use EJB-specific APIs
and JNDI lookups, and work with business interfaces that could be
implemented without using EJB. This provides a valuable decoupling
of client (such as web components) and business objects (which may
or may not be EJBs). This gives us the choice of introducing EJB
into an application (or removing EJB from an application) without
affecting code using business objects.
The motivation for the classes in this package are discussed in Chapter 11 of
Expert One-On-One J2EE Design and Development
by Rod Johnson (Wrox, 2002).
However, the implementation and naming of classes in this package has changed.
It now uses FactoryBeans and AOP, rather than the custom bean definitions described in
Expert One-on-One J2EE.
|
| Java Source File Name | Type | Comment |
| AbstractRemoteSlsbInvokerInterceptor.java | Class | Superclass for interceptors proxying remote Stateless Session Beans. |
| AbstractSlsbInvokerInterceptor.java | Class | Superclass for AOP interceptors invoking local or remote Stateless Session Beans. |
| EjbAccessException.java | Class | Exception that gets thrown when an EJB stub cannot be accessed properly. |
| LocalSlsbInvokerInterceptor.java | Class | Invoker for a local Stateless Session Bean.
Caches the home object. |
| LocalStatelessSessionProxyFactoryBean.java | Class | Convenient factory for local Stateless Session Bean (SLSB) proxies.
If you want control over interceptor chaining, use an AOP ProxyFactoryBean
with LocalSlsbInvokerInterceptor rather than rely on this class.
See
org.springframework.jndi.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. |
| SimpleRemoteSlsbInvokerInterceptor.java | Class | Basic invoker for a remote Stateless Session Bean.
"Creates" a new EJB instance for each invocation.
See
org.springframework.jndi.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. |
| SimpleRemoteStatelessSessionProxyFactoryBean.java | Class | Convenient factory for remote SLSB proxies.
If you want control over interceptor chaining, use an AOP ProxyFactoryBean
with SimpleRemoteSlsbInvokerInterceptor rather than rely on this class.
See
org.springframework.jndi.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. |