/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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 android.ddm;

import org.apache.harmony.dalvik.ddmc.Chunk;
import org.apache.harmony.dalvik.ddmc.ChunkHandler;
import org.apache.harmony.dalvik.ddmc.DdmServer;
import android.util.Config;
import android.util.Log;
import java.nio.ByteBuffer;

/**
 * Handle an EXIT chunk.
 */
public class DdmHandleExit extends ChunkHandler {

    public static final int CHUNK_EXIT = type("EXIT");

    private static DdmHandleExit mInstance = new DdmHandleExit();


    /* singleton, do not instantiate */
    private DdmHandleExit() {}

    /**
     * Register for the messages we're interested in.
     */
    public static void register() {
        DdmServer.registerHandler(CHUNK_EXIT, mInstance);
    }

    /**
     * Called when the DDM server connects.  The handler is allowed to
     * send messages to the server.
     */
    public void connected() {}

    /**
     * Called when the DDM server disconnects.  Can be used to disable
     * periodic transmissions or clean up saved state.
     */
    public void disconnected() {}

    /**
     * Handle a chunk of data.  We're only registered for "EXIT".
     */
    public Chunk handleChunk(Chunk request) {
        if (Config.LOGV)
            Log.v("ddm-exit", "Handling " + name(request.type) + " chunk");

        /*
         * Process the request.
         */
        ByteBuffer in = wrapChunk(request);

        int statusCode = in.getInt();

        Runtime.getRuntime().halt(statusCode);

        // if that doesn't work, return an empty message
        return null;
    }
}