com.justcloud.osgifier.SpringContextHolder.java Source code

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Here is the source code for com.justcloud.osgifier.SpringContextHolder.java

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/*******************************************************************************
 * Copyright 2012 Just-Cloud
 * 
 * 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.justcloud.osgifier;

import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.ServiceRegistration;
import org.springframework.context.ApplicationContext;
import org.springframework.osgi.context.support.OsgiBundleXmlApplicationContext;

public class SpringContextHolder {

    private static SpringContextHolder instance;
    private Map<String, OsgiBundleXmlApplicationContext> contexts;

    private List<ServiceRegistration> regs;

    static {
        instance = new SpringContextHolder();
    }

    private SpringContextHolder() {
        contexts = new ConcurrentHashMap<String, OsgiBundleXmlApplicationContext>();
        regs = new ArrayList<ServiceRegistration>();
    }

    public ApplicationContext getContext(String name) {
        return contexts.get(name);
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public void registerContext(String name, OsgiBundleXmlApplicationContext context) {
        contexts.put(name, context);
        context.refresh();

        BundleContext bc = FrameworkUtil.getBundle(SpringContextHolder.class).getBundleContext();
        Hashtable properties = new Hashtable();
        properties.put("name", name);
        regs.add(bc.registerService(OsgiBundleXmlApplicationContext.class.getName(), context, properties));
    }

    public void unregisterContext(String name) {
        OsgiBundleXmlApplicationContext context = contexts.get(name);
        contexts.remove(name);
        context.stop();
        ServiceRegistration removeReg = null;
        for (ServiceRegistration reg : regs) {
            if (reg.getReference().getProperty("name").equals(name)) {
                removeReg = reg;
            }
        }
        if (removeReg != null) {
            regs.remove(removeReg);
            removeReg.unregister();
        }
    }

    public void stop() {
        List<String> remove = new ArrayList<String>();
        for (Map.Entry<String, OsgiBundleXmlApplicationContext> entry : contexts.entrySet()) {
            try {
                entry.getValue().stop();
            } catch (Exception ex) {
                Logger.getLogger(SpringContextHolder.class.getName()).log(Level.SEVERE,
                        "Cannot stop context for context " + entry.getKey(), ex);
            }
        }
        for (String r : remove) {
            contexts.remove(r);
        }
    }

    public static SpringContextHolder getInstance() {
        return instance;
    }

}