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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.ddm;
     18 
     19 import org.apache.harmony.dalvik.ddmc.Chunk;
     20 import org.apache.harmony.dalvik.ddmc.ChunkHandler;
     21 import org.apache.harmony.dalvik.ddmc.DdmServer;
     22 import android.util.Log;
     23 import java.nio.ByteBuffer;
     24 
     25 
     26 /**
     27  * Track our app name.  We don't (currently) handle any inbound packets.
     28  */
     29 public class DdmHandleAppName extends ChunkHandler {
     30 
     31     public static final int CHUNK_APNM = type("APNM");
     32 
     33     private volatile static String mAppName = "";
     34 
     35     private static DdmHandleAppName mInstance = new DdmHandleAppName();
     36 
     37 
     38     /* singleton, do not instantiate */
     39     private DdmHandleAppName() {}
     40 
     41     /**
     42      * Register for the messages we're interested in.
     43      */
     44     public static void register() {}
     45 
     46     /**
     47      * Called when the DDM server connects.  The handler is allowed to
     48      * send messages to the server.
     49      */
     50     public void connected() {}
     51 
     52     /**
     53      * Called when the DDM server disconnects.  Can be used to disable
     54      * periodic transmissions or clean up saved state.
     55      */
     56     public void disconnected() {}
     57 
     58     /**
     59      * Handle a chunk of data.
     60      */
     61     public Chunk handleChunk(Chunk request) {
     62         return null;
     63     }
     64 
     65 
     66 
     67     /**
     68      * Set the application name.  Called when we get named, which may be
     69      * before or after DDMS connects.  For the latter we need to send up
     70      * an APNM message.
     71      */
     72     public static void setAppName(String name, int userId) {
     73         if (name == null || name.length() == 0)
     74             return;
     75 
     76         mAppName = name;
     77 
     78         // if DDMS is already connected, send the app name up
     79         sendAPNM(name, userId);
     80     }
     81 
     82     public static String getAppName() {
     83         return mAppName;
     84     }
     85 
     86     /*
     87      * Send an APNM (APplication NaMe) chunk.
     88      */
     89     private static void sendAPNM(String appName, int userId) {
     90         if (false)
     91             Log.v("ddm", "Sending app name");
     92 
     93         ByteBuffer out = ByteBuffer.allocate(
     94                             4 /* appName's length */
     95                             + appName.length()*2 /* appName */
     96                             + 4 /* userId */);
     97         out.order(ChunkHandler.CHUNK_ORDER);
     98         out.putInt(appName.length());
     99         putString(out, appName);
    100         out.putInt(userId);
    101 
    102         Chunk chunk = new Chunk(CHUNK_APNM, out);
    103         DdmServer.sendChunk(chunk);
    104     }
    105 
    106 }
    107 
    108