/*
 * 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 com.sun.jini.norm;

import java.rmi.MarshalledObject;
import java.rmi.RemoteException;
import java.rmi.activation.ActivationException;
import java.rmi.activation.ActivationGroup;
import java.rmi.activation.ActivationID;
import java.rmi.activation.ActivationSystem;
import java.util.logging.Level;

import com.sun.jini.config.Config;
import com.sun.jini.logging.Levels;
import com.sun.jini.start.ServiceStarter;
import net.jini.activation.ActivationExporter;
import net.jini.config.Configuration;
import net.jini.config.ConfigurationException;
import net.jini.export.Exporter;
import net.jini.jeri.BasicILFactory;
import net.jini.jeri.BasicJeriExporter;
import net.jini.jeri.tcp.TcpServerEndpoint;
import net.jini.security.BasicProxyPreparer;
import net.jini.security.ProxyPreparer;

/**
 * Provides an activatable implementation of NormServer.
 *
 * 
 * @since 2.0
 */
class ActivatableNormServerImpl extends NormServerBaseImpl {
    /** Our activation ID */
    private ActivationID activationID;

    /** The activation system, prepared */
    private ActivationSystem activationSystem;

    // Inherit java doc from super type
    public void destroy() throws RemoteException {
	try {
	    activationSystem.unregisterObject(activationID);
	    logger.log(Level.FINEST,
		       "Unregistered object with activation system");
	} catch (ActivationException e) {
	    /*
	     * Activation system is shutting down or this
	     * object has already been unregistered --
	     * ignore in either case.
	     */
	    logger.log(Levels.HANDLED,
		       "Unable to unregister object with activation system",
		       e);
	}
	super.destroy();
    }

    // inherit doc comment
    void postDestroy() {
	/* inactive will set current group ID to null */
	try {
	    net.jini.activation.ActivationGroup.inactive(
		activationID, exporter);
	    logger.log(Level.FINEST,
		       "Inactivated object with activation system");
	} catch (RemoteException e) {
	    logger.log(Levels.HANDLED,
		       "Unable to inactivate object with activation system",
		       e);
	} catch (ActivationException e) {
	    logger.log(Levels.HANDLED,
		       "Unable to inactivate object with activation system",
		       e);
	}
    }

    /**
     * Provides a constructor for an activatable implementation of NormServer
     * suitable for use with {@link ServiceStarter}.
     *
     * @param activationID activation ID passed in by the activation daemon
     * @param data state data needed to re-activate a Norm server
     * @throws Exception if there is a problem creating the server
     */
    ActivatableNormServerImpl(ActivationID activationID, MarshalledObject data)
	throws Exception
    {
	super(true /* persistent */);
	String[] configOptions = null;
	try {
	    if (activationID == null) {
		throw new NullPointerException("activationID is null");
	    }
	    configOptions = (String[]) data.get();
	} catch (Throwable e) {
	    initFailed(e);
	}
	this.activationID = activationID;
	init(configOptions, null);
    }

    void initAsSubject(Configuration config) throws Exception {
	ProxyPreparer activationSystemPreparer =
	    (ProxyPreparer) Config.getNonNullEntry(
		config, NORM, "activationSystemPreparer", ProxyPreparer.class,
		new BasicProxyPreparer());
	activationSystem =
	    (ActivationSystem) activationSystemPreparer.prepareProxy(
		ActivationGroup.getSystem());
	ProxyPreparer activationIdPreparer = (ProxyPreparer)
	    Config.getNonNullEntry(
		config, NORM, "activationIdPreparer", ProxyPreparer.class,
		new BasicProxyPreparer());
	activationID = (ActivationID) activationIdPreparer.prepareProxy(
	    activationID);
	super.initAsSubject(config);
    }

    Exporter getExporter(Configuration config)
	throws ConfigurationException
    {
	Exporter result = (Exporter) Config.getNonNullEntry(
	    config, NORM, "serverExporter", Exporter.class,
	    new ActivationExporter(
		activationID,
		new BasicJeriExporter(
		    TcpServerEndpoint.getInstance(0), new BasicILFactory())),
	    activationID);
	return result;
    }
}