org.xaloon.wicket.component.inject.j2ee.bm.WeldBeanManagerLocator.java Source code

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Here is the source code for org.xaloon.wicket.component.inject.j2ee.bm.WeldBeanManagerLocator.java

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/*
 * 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.xaloon.wicket.component.inject.j2ee.bm;

import javax.enterprise.inject.spi.BeanManager;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import org.apache.wicket.Application;
import org.apache.wicket.MetaDataKey;
import org.apache.wicket.ThreadContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author vytautas r.
 */
public class WeldBeanManagerLocator implements BeanManagerLocator {
    private transient BeanManager beanManager;

    private static final long serialVersionUID = 1L;

    private static final Logger LOGGER = LoggerFactory.getLogger(WeldBeanManagerLocator.class);

    static MetaDataKey<BeanManagerHolder> BEAN_MANAGER_KEY = new MetaDataKey<BeanManagerHolder>() {

        private static final long serialVersionUID = 1L;

    };

    @Override
    public BeanManager getBeanManager() {
        if (beanManager == null) {
            Application application = ThreadContext.getApplication();
            if (application == null) {
                // Runs in different thread. get beanManager directly from JNDI.
                beanManager = locateBeanManagerFromJNDI();
            } else {
                // Get bean manager from application
                beanManager = getBeanManagerFromApplication(application);
            }
        }
        return beanManager;
    }

    private BeanManager getBeanManagerFromApplication(Application application) {
        BeanManager beanManager = null;
        BeanManagerHolder beanManagerHolder = application.getMetaData(BEAN_MANAGER_KEY);
        if (beanManagerHolder == null || beanManagerHolder.getBeanManager() == null) {
            beanManager = locateBeanManagerFromJNDI();
            Application.get().setMetaData(BEAN_MANAGER_KEY, new BeanManagerHolder(beanManager));
        } else {
            beanManager = beanManagerHolder.getBeanManager();
        }
        return beanManager;
    }

    private BeanManager locateBeanManagerFromJNDI() {
        try {
            InitialContext initialContext = new InitialContext();
            return (BeanManager) initialContext.lookup("java:comp/BeanManager");
        } catch (NamingException e) {
            LOGGER.error("Couldn't get BeanManager through JNDI");
            return null;
        }
    }
}