org.springframework.remoting.support

Class RemoteExporter

java.lang.Object

org.springframework.remoting.support.RemotingSupport

org.springframework.remoting.support.RemoteExporter

All Implemented Interfaces:

Aware, BeanClassLoaderAware

Direct Known Subclasses:

BurlapExporter, HessianExporter, RemoteInvocationBasedExporter

public abstract class RemoteExporter
extends RemotingSupport

Abstract base class for classes that export a remote service. Provides "service" and "serviceInterface" bean properties.

Note that the service interface being used will show some signs of remotability, like the granularity of method calls that it offers. Furthermore, it has to have serializable arguments etc.

Since:

26.12.2003

Author:

Juergen Hoeller

Field Summary

Fields inherited from class org.springframework.remoting.support.RemotingSupport

logger

Constructor Summary

Constructors

Constructor and Description
RemoteExporter()

Method Summary

Modifier and Type	Method and Description
protected void	checkService() Check whether the service reference has been set.
protected void	checkServiceInterface() Check whether a service reference has been set, and whether it matches the specified service.
protected String	getExporterName() Return a short name for this exporter.
protected Object	getProxyForService() Get a proxy for the given service object, implementing the specified service interface.
Object	getService() Return the service to export.
Class<?>	getServiceInterface() Return the interface of the service to export.
void	setInterceptors(Object[] interceptors) Set additional interceptors (or advisors) to be applied before the remote endpoint, e.g.
void	setRegisterTraceInterceptor(boolean registerTraceInterceptor) Set whether to register a RemoteInvocationTraceInterceptor for exported services.
void	setService(Object service) Set the service to export.
void	setServiceInterface(Class<?> serviceInterface) Set the interface of the service to export.

Methods inherited from class org.springframework.remoting.support.RemotingSupport

getBeanClassLoader, overrideThreadContextClassLoader, resetThreadContextClassLoader, setBeanClassLoader

Methods inherited from class java.lang.Object

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

Constructor Detail

RemoteExporter

public RemoteExporter()

Method Detail

setService

public void setService(Object service)

Set the service to export. Typically populated via a bean reference.

getService

public Object getService()

Return the service to export.

setServiceInterface

public void setServiceInterface(Class<?> serviceInterface)

Set the interface of the service to export. The interface must be suitable for the particular service and remoting strategy.

getServiceInterface

public Class<?> getServiceInterface()

Return the interface of the service to export.

setRegisterTraceInterceptor

public void setRegisterTraceInterceptor(boolean registerTraceInterceptor)

Set whether to register a RemoteInvocationTraceInterceptor for exported services. Only applied when a subclass uses getProxyForService for creating the proxy to expose.

Default is "true". RemoteInvocationTraceInterceptor's most important value is that it logs exception stacktraces on the server, before propagating an exception to the client. Note that RemoteInvocationTraceInterceptor will not be registered by default if the "interceptors" property has been specified.

See Also:

setInterceptors(java.lang.Object[]), getProxyForService(), RemoteInvocationTraceInterceptor

setInterceptors

public void setInterceptors(Object[] interceptors)

Set additional interceptors (or advisors) to be applied before the remote endpoint, e.g. a PerformanceMonitorInterceptor.

You may specify any AOP Alliance MethodInterceptors or other Spring AOP Advices, as well as Spring AOP Advisors.

See Also:

getProxyForService(), PerformanceMonitorInterceptor

checkService

protected void checkService()
                     throws IllegalArgumentException

Check whether the service reference has been set.

Throws:

IllegalArgumentException

See Also:

setService(java.lang.Object)

checkServiceInterface

protected void checkServiceInterface()
                              throws IllegalArgumentException

Check whether a service reference has been set, and whether it matches the specified service.

Throws:

IllegalArgumentException

See Also:

setServiceInterface(java.lang.Class<?>), setService(java.lang.Object)

getProxyForService

protected Object getProxyForService()

Get a proxy for the given service object, implementing the specified service interface.

Used to export a proxy that does not expose any internals but just a specific interface intended for remote access. Furthermore, a RemoteInvocationTraceInterceptor will be registered (by default).

Returns:

the proxy

See Also:

setServiceInterface(java.lang.Class<?>), setRegisterTraceInterceptor(boolean), RemoteInvocationTraceInterceptor

getExporterName

protected String getExporterName()

Return a short name for this exporter. Used for tracing of remote invocations.

Default is the unqualified class name (without package). Can be overridden in subclasses.

See Also:

getProxyForService(), RemoteInvocationTraceInterceptor, ClassUtils.getShortName(java.lang.String)