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Extra resources for The JBoss 4 Application Server Guide (JBoss AS 4.0.2)
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The injection element supports type attributes: • • id: The id attribute specifies the injection point type. The current injection point types are: • MBeanServerType: An MBeanServerType injection point receives a reference to the MBeanServer that the XMBean is registered with. • MBeanInfoType: An MBeanInfoType injection point receives a reference to the XMBean ModelMBeanInfo metadata. • ObjectNameType: The ObjectName injection point receives the ObjectName that the XMBean is registered under. setMethod: The setMethod attribute gives the name of the method used to set the injection value on the resource.
It specifies an empty URL[] and delegates to the EJB DynClassLoader as its parent class loader. • Web ENCLoader: The Web ENCLoader node is a URLClassLoader that exists only to provide a unique context for a web deployment's java:comp JNDI context. It specifies an empty URL[] and delegates to the TCL as its parent class loader. • WAR Loader: The WAR Loader is a servlet container specific classloader that delegates to the Web ENCLoader as its parent class loader. The default behavior is to load from its parent class loader and then the WAR WEB-INF classes and lib directories.
1. The JBoss ClassLoader Architecture JBoss employs a class loading architecture that facilitates sharing of classes across deployment units and hot deployment of services and applications. Before discussing the JBoss specific class loading model, we need to understand the nature of Java's type system and how class loaders fit in. 2. Class Loading and Types in Java Class loading is a fundamental part of all server architectures. Arbitrary services and their supporting classes must be loaded into the server framework.