Struts example source code file (SpringOsgiObjectFactory.java)

This example Struts source code file (SpringOsgiObjectFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

bundleaccessor, class, classnotfoundexception, exception, exception, inject, map, map, object, object, objectfactory, servicereference, servicereference, spring_service_name, util

The Struts SpringOsgiObjectFactory.java source code

/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.struts2.osgi;

import com.opensymphony.xwork2.ObjectFactory;
import com.opensymphony.xwork2.util.ClassLoaderUtil;
import com.opensymphony.xwork2.inject.Inject;
import org.osgi.framework.ServiceReference;

import java.util.Map;

/**
 * This Object factory uses the ActionContext(s) published by Spring OSGi
 * to lookup beans
 */
public class SpringOsgiObjectFactory extends ObjectFactory {
    private final static String SPRING_SERVICE_NAME = "org.springframework.context.ApplicationContext";

    private BundleAccessor bundleAccessor;

    public Object buildBean(String className, Map<String, Object> extraContext, boolean injectInternal) throws Exception {
        if (containsBean(className))
            return getBean(className);
        else {
            Class clazz = ClassLoaderUtil.loadClass(className, SpringOsgiObjectFactory.class);
            Object object = clazz.newInstance();
            if (injectInternal)
                injectInternalBeans(object);
            return object;
        }

    }

    public Object buildBean(Class clazz, Map<String, Object> extraContext) throws Exception {
        return clazz.newInstance();
    }

    public Class getClassInstance(String className) throws ClassNotFoundException {
        return containsBean(className) ? getBean(className).getClass() :  ClassLoaderUtil.loadClass(className, SpringOsgiObjectFactory.class);
    }

    protected Object getBean(String beanName) {
        ServiceReference[] refs = bundleAccessor.getAllServiceReferences(SPRING_SERVICE_NAME);
        if (refs != null) {
            for (ServiceReference ref : refs) {
                Object context = bundleAccessor.getService(ref);
                if (OsgiUtil.containsBean(context, beanName))
                    return OsgiUtil.getBean(context, beanName);
            }
        }

        return null;
    }

    protected boolean containsBean(String beanName) {
        ServiceReference[] refs = bundleAccessor.getAllServiceReferences(SPRING_SERVICE_NAME);
        if (refs != null) {
            for (ServiceReference ref : refs) {
                Object context = bundleAccessor.getService(ref);
                if (OsgiUtil.containsBean(context, beanName))
                    return true;
            }
        }

        return false;
    }

    @Inject
    public void setBundleAccessor(BundleAccessor bundleAccessor) {
        this.bundleAccessor = bundleAccessor;
    }
}