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Introduction of AOP in Spring Framework

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AOP Proxies in Spring framework

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AOP Xml based Configuration Example in Spring Framework

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Language Reference with SpEL in Spring Framework

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Introduction of Spring Framework Transaction Management in Spring Framework

Spring Framework Transaction Abstraction

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Introduction of Spring OXM (Object XML Mapping) in Spring Framework

Integration of Spring with Jaxb Example in Spring framework

Example of Spring with Xstream in Spring Framework

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Remote Method Invocation(RMI) in Spring Framework

Spring and RMI Integration with Example in Spring Framework

Example of Spring and Httpinvoker in Spring Framework

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Introduction of Webservice in Spring Framework

Spring Web Services in Spring Framework

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Exposing and Exporting servlet-based Web Services using JAX-WS in Spring Framework

Accessing Web Services using JAX-WS in Spring Framework

Introduction of JMS in Spring Framework

JMS Messaging Models in Spring Framework

Using Spring JMS in Spring Framework

Sending and Receiving a Message Using JMS API in Spring Framework

Introduction of JMX (Java Management Extension) in Spring Framework

Integrating Beans with JMX in Spring Framework

Creating a MBeanServer in Spring Framework

Introduction Java Mail with Spring in Spring Framework

Example of Java Mail with spring in Spring Framework

Introduction of EJB(Enterprise JavaBeans) in Spring Framework

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Remote Method Invocation(RMI) in Spring Framework

Spring provides various ways to develop remote services. Remote services are services hosted on remote servers and accessed by clients over the network. For example, lets say you are developing a desktop application that needs to connect to a central server. The desktop application can be on various machines. you can use spring remoting to connect the clients on the desktop to the server.

Web services developed using JAX-WS can also be developed and integrated using Spring. Currently, Spring supports the following remoting technologies:

RMI- Remote Method Invocation - Use RMI to invoke a remote method. The java objects are serialized.
Hessian- Transfer binary data between the client and the server.
Burlap- Transfer XML data between the client and the server. It is the XML alternative to Hessian.
JAX-WS- Java XML API for Web Services.
Spring’s HTTP invoker- Spring provides a special remoting strategy which allows for Java serialization via HTTP, supporting any Java interface . The corresponding support classes are HttpInvokerProxyFactoryBean and HttpInvokerServiceExporter.
JMS- Remoting using JMS as the underlying protocol is supported via the JmsInvokerServiceExporter and JmsInvokerProxyFactoryBean classes.
AMQP- Remoting using AMQP as the underlying protocol is supported by the Spring AMQP project.

Spring RMI (Remote Method Invocation) WorkFlow

In this Topic we provide the Spring Remoting using RMI with workflow. Spring creates a proxy that represents the actual remote bean. The proxy is created using RmiProxyFactoryBean. The proxy can be used as a normal Spring bean and the client code does not need to know that it is actually calling a remote method.

The important classes org.springframework.aop.framework.ProxyFactory.RmiProxyFactoryBean. This class will be used by the client to create a proxy to connect to the remote service. This is a spring FactoryBean for creating RMI proxies. The proxied service is use a spring bean using the interface specified in the ServiceInterface property.

The Remote service URL can be specified by the serviceUrl property. org.springframework.remoting.rmi.RmiServiceExporter - This class will be used by the server to create a remote service. below diagram shows the process of RMI.

There are following steps to explain the diagram as follows:

Client sends a message call.
This message call is handled by an RMI Proxy created by RmiProxyFactoryBean.
The RMI Proxy converts the call into a remote call over JRMP (Java Remote Method Protocol).
The RMI Service Adapter created by RmiServiceExporter intercepts the remote call over JRMP.
It forwards the method call to Service.

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