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InjectionManager.javaAPI DocGlassfish v2 API7232Fri May 04 22:33:14 BST 2007com.sun.enterprise

InjectionManager.java

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package com.sun.enterprise;

import com.sun.enterprise.deployment.JndiNameEnvironment;

/**
 * InjectionManager provides runtime resource injection(@Resource, @EJB, etc.) 
 * and generic callback(PostConstruct/PreDestroy) services  It performs 
 * the actual injection into the fields and methods of designated
 * J2EE 5 component instances and managed class instances.  The decision 
 * as to when injection takes place is determined by the caller.
 *
 * @author Kenneth Saks
 */
public interface InjectionManager {

    /**
     * Inject the given object instance with the resources from its
     * component environment.  The applicable component naming environment
     * information will be retrieved from the current invocation context.
     *
     * Any @PostConstruct methods on the instance's class(and super-classes)
     * will be invoked after injection.  
     *
     * @exception InjectionException Thrown if an error occurs during injection
     * 
     */
    public void injectInstance(Object instance)
        throws InjectionException;

    /**
     * Inject the injectable resources from the given component environment
     * into an object instance. The specified componentEnv must match the
     * environment that is associated with the component on top of the
     * invocation stack at the time this method is invoked.
     *
     * Any @PostConstruct methods on the instance's class(and super-classes)
     * will be invoked after injection.  
     *
     *
     * @exception InjectionException Thrown if an error occurs during injection
     * 
     */
    public void injectInstance(Object instance, 
                               JndiNameEnvironment componentEnv)
        throws InjectionException;

    /**
     * Inject the injectable resources from the given component environment
     * into an object instance. The specified componentEnv must match the
     * environment that is associated with the component on top of the
     * invocation stack at the time this method is invoked.
     *
     * @param invokePostConstruct if true, invoke any @PostConstruct methods
     * on the instance's class(and super-classes) after injection.
     *
     * @exception InjectionException Thrown if an error occurs during injection
     * 
     */
    public void injectInstance(Object instance, 
                               JndiNameEnvironment componentEnv,
                               boolean invokePostConstruct)
        throws InjectionException;

    /**
     * Inject the injectable resources from the given component environment
     * into a Class instance.  Only class-level(static) fields/methods are 
     * supported.  E.g., this injection operation would be used for the 
     * Application Client Container main class. 
     *
     * Any @PostConstruct methods on the class(and super-classes)
     * will be invoked after injection.  
     *
     * @exception InjectionException Thrown if an error occurs during injection
     */
    public void injectClass(Class clazz, 
                            JndiNameEnvironment componentEnv)
        throws InjectionException;

    /**
     * Inject the injectable resources from the given component environment
     * into a Class instance.  Only class-level(static) fields/methods are 
     * supported.  E.g., this injection operation would be used for the 
     * Application Client Container main class. 
     *
     * @param invokePostConstruct if true, invoke any @PostConstruct methods
     * on the class(and super-classes) after injection.
     *
     * @exception InjectionException Thrown if an error occurs during injection
     */
    public void injectClass(Class clazz, 
                            JndiNameEnvironment componentEnv,
                            boolean invokePostConstruct)
        throws InjectionException;

    /**
     *
     * Invoke any @PreDestroy methods defined on the instance's class
     * (and super-classes).  Invocation information will be retrieved from
     * the current component invocation context.
     *
     * @exception InjectionException Thrown if an error occurs
     * 
     */
    public void invokeInstancePreDestroy(Object instance)
        throws InjectionException;


    /**
     *
     * Invoke any @PreDestroy methods defined on the instance's class
     * (and super-classes). The specified componentEnv must match the
     * environment that is associated with the component on top of the
     * invocation stack at the time this method is invoked.
     *
     * @exception InjectionException Thrown if an error occurs
     * 
     */
    public void invokeInstancePreDestroy(Object instance,
                                         JndiNameEnvironment componentEnv)
        throws InjectionException;

    /**
     *
     * Invoke any static @PreDestroy methods defined on the class
     * (and super-classes). The specified componentEnv must match the
     * environment that is associated with the component on top of the
     * invocation stack at the time this method is invoked.
     *
     * @exception InjectionException Thrown if an error occurs
     * 
     */
    public void invokeClassPreDestroy(Class clazz,
                                      JndiNameEnvironment componentEnv)
        throws InjectionException;


}