Exposing services using RMI
28.2 Exposing services using RMI
Using Spring’s support for RMI, you can transparently expose your services through the RMI infrastructure. After having this set up, you basically have a configuration similar to remote EJBs, except for the fact that there is no standard support for security context propagation or remote transaction propagation. Spring does provide hooks for such additional invocation context when using the RMI invoker, so you can for example plug in security frameworks or custom security credentials here. Exporting the service using the RmiServiceExporter Using the RmiServiceExporter , we can expose the interface of our AccountService object as RMI object. The interface can be accessed by using RmiProxyFactoryBean , or via plain RMI in case of a traditional RMI service. The RmiServiceExporter explicitly supports the exposing of any non-RMI services via RMI invokers. Of course, we first have to set up our service in the Spring container: bean id = accountService class = example.AccountServiceImpl -- any additional properties, maybe a DAO? -- bean Next we’ll have to expose our service using the RmiServiceExporter : bean class = org.springframework.remoting.rmi.RmiServiceExporter -- does not necessarily have to be the same name as the bean to be exported -- property name = serviceName value = AccountService property name = service ref = accountService property name = serviceInterface value = example.AccountService -- defaults to 1099 -- property name = registryPort value = 1199 bean As you can see, we’re overriding the port for the RMI registry. Often, your application server also maintains an RMI registry and it is wise to not interfere with that one. Furthermore, the service name is used to bind the service under. So right now, the service will be bound at rmi:HOST:1199 AccountService . We’ll use the URL later on to link in the service at the client side. Note The servicePort property has been omitted it defaults to 0. This means that an anonymous port will be used to communicate with the service. 4.3.9.RELEASE Spring Framework 670 Linking in the service at the client Our client is a simple object using the AccountService to manage accounts: public class SimpleObject { private AccountService accountService; public void setAccountServiceAccountService accountService { this .accountService = accountService; } additional methods using the accountService } To link in the service on the client, we’ll create a separate Spring container, containing the simple object and the service linking configuration bits: bean class = example.SimpleObject property name = accountService ref = accountService bean bean id = accountService class = org.springframework.remoting.rmi.RmiProxyFactoryBean property name = serviceUrl value = rmi:HOST:1199AccountService property name = serviceInterface value = example.AccountService bean That’s all we need to do to support the remote account service on the client. Spring will transparently create an invoker and remotely enable the account service through the RmiServiceExporter . At the client we’re linking it in using the RmiProxyFactoryBean .28.3 Using Hessian or Burlap to remotely call services via HTTP
Parts
» Dependency Injection and Inversion of Control Framework Modules
» Usage scenarios Introduction to the Spring Framework
» Java EE 6 and 7 Groovy Bean Definition DSL
» Core Container Improvements General Web Improvements
» WebSocket, SockJS, and STOMP Messaging Testing Improvements
» JMS Improvements Caching Improvements
» Web Improvements New Features and Enhancements in Spring Framework 1
» WebSocket Messaging Improvements Testing Improvements
» Core Container Improvements New Features and Enhancements in Spring Framework 4.2
» Data Access Improvements JMS Improvements Web Improvements
» Core Container Improvements Data Access Improvements Caching Improvements
» JMS Improvements Web Improvements WebSocket Messaging Improvements Testing Improvements
» Introduction to the Spring IoC container and beans
» Container overview The IoC container
» Bean overview The IoC container
» Dependencies The IoC container
» y.Baz beans The IoC container
» driverClassName = username = The IoC container
» email = spouse-ref = The IoC container
» y.Bar bean y.Foo constructor-arg y.Foo c:bar-ref baz-ref = y.Foo c:_0-ref _1-ref =
» y.z.MyValueCalculator b.c.ReplacementComputeValue Bean scopes
» y.Foo property Customizing the nature of a bean
» Bean definition inheritance The IoC container
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» Annotation-based container configuration The IoC container
» Classpath scanning and managed components
» Using JSR 330 Standard Annotations
» Java-based container configuration The IoC container
» Environment abstraction The IoC container
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» The BeanFactory The IoC container
» Introduction The Resource interface
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» Spring Type Conversion Validation, Data Binding, and Type Conversion
» Spring Field Formatting Validation, Data Binding, and Type Conversion
» Configuring a global date time format
» Spring Validation Validation, Data Binding, and Type Conversion
» Introduction Feature Overview Spring Expression Language SpEL
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» Language Reference Spring Expression Language SpEL
» 3e0 4 .getValueDouble. 4e0 2 .getValueDouble.
» Classes used in the examples
» Introduction Aspect Oriented Programming with Spring
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» y.service.DefaultFooService y.SimpleProfiler aop:config
» Choosing which AOP declaration style to use
» Mixing aspect types Proxying mechanisms
» Introduction Pointcut API in Spring
» Advisor API in Spring Using the ProxyFactoryBean to create AOP proxies
» Concise proxy definitions Spring AOP APIs
» Creating AOP proxies programmatically with the ProxyFactory Manipulating advised objects
» Using the auto-proxy facility
» Using TargetSources Spring AOP APIs
» Mock Objects Unit Testing support Classes
» Overview Goals of Integration Testing
» JDBC Testing Support Annotations
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» loginAction-ref = username = userPreferences-ref = theme =
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» y.service.DefaultFooService Transaction Management
» y.service.DefaultFooService y.SimpleProfiler y.service.DefaultFooService
» y.SimpleProfiler Transaction Management
» Programmatic transaction management Transaction Management
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» Application server-specific integration Transaction Management
» Introduction Consistent exception hierarchy
» Annotations used for configuring DAO or Repository classes
» Introduction to Spring Framework JDBC
» Using the JDBC core classes to control basic JDBC processing and error handling
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» Simplifying JDBC operations with the SimpleJdbc classes
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» Common problems with parameter and data value handling
» Embedded database support Data access with JDBC
» Initializing a DataSource Data access with JDBC
» Introduction to ORM with Spring
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» Introduction Marshaller and Unmarshaller
» Using Marshaller and Unmarshaller
» XML Schema-based Configuration JAXB
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» XStream Marshalling XML using OX Mappers
» Introduction to Spring Web MVC framework
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» Introduction Integrating with other web frameworks
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» JavaServer Faces 1.2 Apache Struts 2.x
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» The DispatcherPortlet Portlet MVC Framework
» The ViewRendererServlet Controllers Portlet MVC Framework
» Handler mappings Portlet MVC Framework
» Views and resolving them Multipart file upload support
» Handling exceptions Annotation-based controller configuration
» absolute-ordering absolute-ordering WebSocket API
» SockJS Fallback Options WebSocket Support
» STOMP Over WebSocket Messaging Architecture
» Introduction Controller method CORS configuration
» Global CORS configuration Advanced Customization
» Introduction Remoting and web services using Spring
» Using Hessian or Burlap to remotely call services via HTTP
» Exposing services using HTTP invokers
» Web services Remoting and web services using Spring
» JMS Remoting and web services using Spring
» Accessing RESTful services on the Client
» Introduction Accessing EJBs Enterprise JavaBeans EJB integration
» Introduction JMS Java Message Service
» Using Spring JMS JMS Java Message Service
» Sending a Message JMS Java Message Service
» Receiving a message JMS Java Message Service
» Support for JCA Message Endpoints
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» Introduction Exporting your beans to JMX
» Controlling the management interface of your beans
» Controlling the ObjectNames for your beans
» Accessing MBeans via Proxies
» Introduction Configuring CCI JCA CCI
» Using Spring’s CCI access support
» Modeling CCI access as operation objects
» Using the JavaMail MimeMessageHelper
» Introduction The Spring TaskExecutor abstraction
» The Spring TaskScheduler abstraction
» Annotation Support for Scheduling and Asynchronous Execution
» The task namespace Task Execution and Scheduling
» Introduction A first example
» y.DefaultBookingService property Defining beans that are backed by dynamic languages
» y.DefaultBookingService property Dynamic language support
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» Bits and bobs y.DefaultBookingService property
» Introduction Understanding the cache abstraction
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» Declarative XML-based caching y.service.DefaultBookService
» Configuring the cache storage name =
» Classic ORM usage Classic Spring Usage
» JMS Usage Classic Spring Usage
» Concise proxy definitions Classic Spring AOP Usage
» Using the autoproxy facility
» Using TargetSources Classic Spring AOP Usage
» Introduction XML Schema-based configuration
» Introduction Authoring the schema
» Coding a NamespaceHandler Extensible XML authoring
» BeanDefinitionParser Extensible XML authoring
» Registering the handler and the schema
» Using a custom extension in your Spring XML configuration Meatier examples
» Introduction The argument tag The bind tag
» The escapeBody tag The eval tag The hasBindErrors tag
» The htmlEscape tag The message tag
» The nestedPath tag The param tag The theme tag
» The transform tag The url tag
» Introduction The button tag The checkbox tag
» The checkboxes tag The errors tag
» The option tag The options tag
» The password tag The radiobutton tag
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