ejbobjectfactory.java

用jbuilder写的源程序

/*
 * Copyright 2003-2006 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package com.jdon.bussinessproxy.target;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.ejb.EJBHome;
import javax.ejb.EJBLocalHome;
import javax.ejb.EJBLocalObject;
import javax.ejb.EJBObject;
import javax.naming.InitialContext;

import com.jdon.bussinessproxy.TargetMetaDef;
import com.jdon.bussinessproxy.meta.DistributedTargetMetaDef;
import com.jdon.bussinessproxy.meta.EJBTargetMetaDef;
import com.jdon.servicelocator.ServiceLocatorException;
import com.jdon.servicelocator.web.ServiceLocator;
import com.jdon.util.Debug;

/**
 * @author <a href="mailto:[e-mail]">banq</a>
 *
 */
public class EJBObjectFactory {
    private final static String module = EJBObjectFactory.class.getName();
    
    private ServiceLocator sl;
    
    
    /**
     * @param sl
     */
    public EJBObjectFactory(ServiceLocator sl) {
        super();
        this.sl = sl;
    }

    public Object create(TargetMetaDef targetMetaDef) throws Exception{
        Object obj = null;
        Debug.logVerbose("[JdonFramework] enter createObject in EJBTargetService " + targetMetaDef.getClassName(), module);
        try {
        	if (targetMetaDef instanceof EJBTargetMetaDef){
            	return createEJB2(targetMetaDef);
        	}else if (targetMetaDef instanceof DistributedTargetMetaDef){
            	DistributedTargetMetaDef dtargetMetaDef = (DistributedTargetMetaDef)targetMetaDef;
            	Debug.logVerbose("[JdonFramework] this is EJB3  JNDIName=" + dtargetMetaDef.getJndiName(), module);
            	InitialContext ctx = new InitialContext();
                obj = ctx.lookup(dtargetMetaDef.getJndiName());
            }
        } catch (Exception ex) {
            Debug.logError("[JdonFramework]create ejb  error: " + ex, module);
            throw new Exception(ex);
        }
        Debug.logVerbose("[JdonFramework] enter createObject in EJBTargetService " + obj.getClass().getName(), module);
        return obj;    
    }

   private Object createEJB2(TargetMetaDef targetMetaDef) throws Exception {
		EJBTargetMetaDef eJBMetaDef = (EJBTargetMetaDef) targetMetaDef;
		if (eJBMetaDef.isLocal()) {
			return createEJBLocal(eJBMetaDef);
		} else {
			return createEJBRemote(eJBMetaDef);
		}
	}
    
    private Object createEJBLocal(EJBTargetMetaDef eJBMetaDef) throws Exception {
		Debug.logVerbose("[JdonFramework] this is EJB2 local "
				+ eJBMetaDef.getClassName(), module);
		Object obj = null;
		try {
			Class[] params = null;
			Object[] paramos = null;
			EJBLocalHome home = (EJBLocalHome) sl.getLocalHome(eJBMetaDef
					.getJndiName());
			Method createMethod = home.getClass().getMethod("create", params);
			obj = (EJBLocalObject) createMethod.invoke(home, paramos);
		} catch (SecurityException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (ServiceLocatorException e) {
			Debug.logError("[JdonFramework]locator error: " + e, module);
			throw new Exception("JNID error:" + e);
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (IllegalAccessException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (InvocationTargetException e) {
			e.printStackTrace();
			throw new Exception(e);
		}
		return obj;
	}
    
    private Object createEJBRemote(EJBTargetMetaDef eJBMetaDef)
			throws Exception {
		Debug.logVerbose("[JdonFramework] this is EJB2 remote "
				+ eJBMetaDef.getClassName(), module);
		Object obj = null;
		Class[] params = null;
		Object[] paramos = null;
		try {
			EJBHome home = sl.getRemoteHome(eJBMetaDef.getJndiName(),
					eJBMetaDef.getHomeClass());
			Method createMethod = home.getClass().getMethod("create", params);
			obj = (EJBObject) createMethod.invoke(home, paramos);
		} catch (SecurityException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (ServiceLocatorException e) {
			Debug.logError("[JdonFramework]locator error: " + e, module);
			throw new Exception("JNID error:" + e);
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (IllegalAccessException e) {
			e.printStackTrace();
			throw new Exception(e);
		} catch (InvocationTargetException e) {
			e.printStackTrace();
			throw new Exception(e);
		}
		return obj;
	}

}