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The role of the deployment descriptor Application assembly information You can specify any of the following application assembly information. During application assembly, this information is optional. This same information is not optional for the role of the deployer. Binding of enterprise bean references Security roles Method permissions Linking of security role references Security identity Transaction attributes During the process of application assembly or deployment, you can modify the following structural information: The values of environment entries. The application assembler can change existing properties and/or define the values of environment properties. Description fields. The application assembler can change existing descriptions or create new description elements. You can t modify any other types of structural information. You can modify any application assembly information at deployment time, however. Security The application assembler usually specifies the following information in the deployment descriptor: Security roles Method permissions Links between security role references and security roles Security identity Security roles Using the security role elements in the deployment descriptor, the developer can define one or more security roles. These define the required security roles for the clients of the enterprise beans. Method permissions Using the method-permission elements in the deployment descriptor, the developer can define method permissions. Method permissions are paired relations between the security roles and the methods of the enterprise bean s remote/local and remote home/local home interfaces. Linking of security role references If security roles are defined, the developer must link them with security role references using the role-link element in the deployment descriptor. Application server-specific properties Deployment descriptors can also include properties that are specific to a particular application server. 110 Developing Applications with Enterprise JavaBeans
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