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Roles in EJB Development

lBean developer: Develops bean component.

lApplication assembler: composes EJBs to form applications

lDeployer: deploys EJB applications within an operation environment.

lSystem administrator: Configures and administers the EJB computing and networking infrastructure.

lEJB Container Provider and EJB server provider: Vendors specializing in low level services such as transactions and application mgt.

l

Roles in EJB Development

lBean developer: Develops bean component.

lApplication assembler: composes EJBs to form applications

lDeployer: deploys EJB applications within an operation environment.

lSystem administrator: Configures and administers the EJB computing and networking infrastructure.

lEJB Container Provider and EJB server provider: Vendors specializing in low level services such as transactions and application mgt.

l

Roles in EJB Development

lBean developer: Develops bean component.

lApplication assembler: composes EJBs to form applications

lDeployer: deploys EJB applications within an operation environment.

lSystem administrator: Configures and administers the EJB computing and networking infrastructure.

lEJB Container Provider and EJB server provider: Vendors specializing in low level services such as transactions and application mgt.

l

Enterprise Java Bean(EJB)

lAn enterprise bean is a server-side component that contains the business logic of an application. At runtime, the application clients execute the business logic by invoking the enterprise bean's methods.

lMain goal of Enterprise Java Bean (EJB) architecture is to free the application developer from having to deal with the system level aspects of an application. This allows the bean developer to focus solely on the logic of the application.

l

WORA

lThe Enterprise JavaBeans architecture defines a standard model for Java application servers to support “Write Once, Run Anywhere” (WORA) portability

What is EJB?

lAn EJB is a specialized, non-visual JavaBean that runs on a server.

l

lEJB technology supports application development based on a multiplier, distributed object architecture in which most of application’s logic is moved from the client to the server.