🗊Презентация Creating Session Beans

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Creating Session Beans, слайд №1Creating Session Beans, слайд №2Creating Session Beans, слайд №3Creating Session Beans, слайд №4Creating Session Beans, слайд №5Creating Session Beans, слайд №6Creating Session Beans, слайд №7Creating Session Beans, слайд №8Creating Session Beans, слайд №9Creating Session Beans, слайд №10Creating Session Beans, слайд №11Creating Session Beans, слайд №12Creating Session Beans, слайд №13Creating Session Beans, слайд №14Creating Session Beans, слайд №15Creating Session Beans, слайд №16Creating Session Beans, слайд №17Creating Session Beans, слайд №18Creating Session Beans, слайд №19Creating Session Beans, слайд №20Creating Session Beans, слайд №21
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Creating Session Beans
Описание слайда:
Creating Session Beans

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Objectives After completing this lesson, you should be able to: Describe session beans Create stateless and stateful session beans by using annotations Understand the passivation and activation of stateful session beans Use interceptor methods and classes
Описание слайда:
Objectives After completing this lesson, you should be able to: Describe session beans Create stateless and stateful session beans by using annotations Understand the passivation and activation of stateful session beans Use interceptor methods and classes

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What Is a Session Bean? A session bean is a type of Enterprise JavaBean (EJB) that: Implements a business process Represents a client/server interaction Has a short lifespan Lives in memory rather than in persistent storage Is used to create a session facade
Описание слайда:
What Is a Session Bean? A session bean is a type of Enterprise JavaBean (EJB) that: Implements a business process Represents a client/server interaction Has a short lifespan Lives in memory rather than in persistent storage Is used to create a session facade

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Stateless Versus Stateful Session Beans There are two types of session beans: Stateless session bean (SLSB) Conversation is contained in a single method call. Business process does not maintain client state. Stateful session bean (SFSB) Conversation may invoke many methods. Business processes can span multiple method requests, which may require maintaining state.
Описание слайда:
Stateless Versus Stateful Session Beans There are two types of session beans: Stateless session bean (SLSB) Conversation is contained in a single method call. Business process does not maintain client state. Stateful session bean (SFSB) Conversation may invoke many methods. Business processes can span multiple method requests, which may require maintaining state.

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Life Cycle of a Stateless Session Bean
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Life Cycle of a Stateless Session Bean

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Creating a Stateless Session Bean To create a stateless session bean: Define the stateless session bean. Define the local and remote interfaces (as needed).
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Creating a Stateless Session Bean To create a stateless session bean: Define the stateless session bean. Define the local and remote interfaces (as needed).

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Define the Stateless Session Bean
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Define the Stateless Session Bean

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Create the Remote and Local Interfaces
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Create the Remote and Local Interfaces

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Create a Test Client for the SLSB
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Create a Test Client for the SLSB

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Life Cycle of a Stateful Session Bean
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Life Cycle of a Stateful Session Bean

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Creating Session Beans, слайд №11
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Passivation and Activation Concepts Passivation and activation are stages in a session bean’s life cycle controlled by the EJB container: Passivation Serializes the bean state to secondary storage Removes the instance from memory Activation Restores the serialized bean’s state from secondary storage Creates a new bean instance or uses a bean from the pool (initialized with the restored state)
Описание слайда:
Passivation and Activation Concepts Passivation and activation are stages in a session bean’s life cycle controlled by the EJB container: Passivation Serializes the bean state to secondary storage Removes the instance from memory Activation Restores the serialized bean’s state from secondary storage Creates a new bean instance or uses a bean from the pool (initialized with the restored state)

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Creating a Stateful Session Bean To create a stateful session bean: Define the stateful session bean. Define the local and remote interfaces (as needed).
Описание слайда:
Creating a Stateful Session Bean To create a stateful session bean: Define the stateful session bean. Define the local and remote interfaces (as needed).

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Define the Stateful Session Bean
Описание слайда:
Define the Stateful Session Bean

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Create the Remote and Local Interfaces
Описание слайда:
Create the Remote and Local Interfaces

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Create a Test Client for the SFSB
Описание слайда:
Create a Test Client for the SFSB

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Interceptor Methods and Classes EJB 3.0 introduces the ability to create custom interceptor methods and classes that are called before invoking the methods they intercept. Interceptors: Are available for only session beans (stateless and stateful) and message-driven beans Provide more granular control of a bean’s method invocation flow Can be used to implement custom transaction or security processes instead of having those services provided by the EJB container Are a new feature whose implementation details are not fully defined and are subject to change
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Interceptor Methods and Classes EJB 3.0 introduces the ability to create custom interceptor methods and classes that are called before invoking the methods they intercept. Interceptors: Are available for only session beans (stateless and stateful) and message-driven beans Provide more granular control of a bean’s method invocation flow Can be used to implement custom transaction or security processes instead of having those services provided by the EJB container Are a new feature whose implementation details are not fully defined and are subject to change

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Interceptor Method
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Interceptor Method

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Interceptor Classes External interceptor classes can be created to abstract the behavior of interceptors and to define multiple interceptors for a bean.
Описание слайда:
Interceptor Classes External interceptor classes can be created to abstract the behavior of interceptors and to define multiple interceptors for a bean.

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Summary In this lesson, you should have learned how to: Describe session beans Create stateless and stateful session beans by using annotations Understand the passivation and activation of stateful session beans Use interceptor methods and classes
Описание слайда:
Summary In this lesson, you should have learned how to: Describe session beans Create stateless and stateful session beans by using annotations Understand the passivation and activation of stateful session beans Use interceptor methods and classes

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Practice 5 Overview: Creating Session Beans This practice covers the following topics: Using JDeveloper to generate ServiceRequestFacade as a stateless session facade for entities Creating a Java client application for testing the session facade functionality
Описание слайда:
Practice 5 Overview: Creating Session Beans This practice covers the following topics: Using JDeveloper to generate ServiceRequestFacade as a stateless session facade for entities Creating a Java client application for testing the session facade functionality

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