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/*******************************************************************************
 * Copyright (c) 2008 Wind River Systems, Inc. and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution, and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 * Contributors:
 *     Wind River Systems - initial API and implementation
 *******************************************************************************/

package org.eclipse.tm.internal.tcf.examples.daytime;

import org.eclipse.tm.tcf.core.Command;
import org.eclipse.tm.tcf.protocol.IChannel;
import org.eclipse.tm.tcf.protocol.IToken;
import org.eclipse.tm.tcf.protocol.Protocol;


public class DaytimeServiceProxy implements IDaytimeService {

    private final IChannel channel;

    DaytimeServiceProxy(IChannel channel) {
        this.channel = channel;
    }

    /**
     * Return service name, as it appears on the wire - a TCF name of the service. 
     */
    public String getName() {
        return NAME;
    }

    /**
     * The method translates arguments to JSON string and sends the command message
     * to remote server. When response arrives, it is translated from JSON to
     * Java object, which are used to call call-back object.
     * 
     * The translation (marshaling) is done by using utility class Command.
     */
    public IToken getTimeOfDay(String tz, final DoneGetTimeOfDay done) {
        return new Command(channel, this, "getTimeOfDay", new Object[]{ tz }) {
            @Override
            public void done(Exception error, Object[] args) {
                String str = null;
                if (error == null) {
                    assert args.length == 3;
                    error = toError(args[0], args[1]);
                    str = (String)args[2];
                }
                done.doneGetTimeOfDay(token, error, str);
            }
        }.token;
    }

    static {
        /*
         * Make Daytime Service proxy available to all potential clients by creating
         * the proxy object every time a TCF communication channel is opened.
         * Note: extension point "org.eclipse.tm.tcf.startup" is used to load this class
         * at TCF startup time, so proxy factory is properly activated even if nobody
         * import directly from this plugin.     
         */
        Protocol.addChannelOpenListener(new Protocol.ChannelOpenListener() {

            public void onChannelOpen(IChannel channel) {
                // Check if remote server provides Daytime service
                if (channel.getRemoteService(IDaytimeService.NAME) == null) return;
                // Create service proxy
                channel.setServiceProxy(IDaytimeService.class, new DaytimeServiceProxy(channel));
            }
        });
    }
}

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