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      1 /*
      2  * Copyright (C) 2017 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 com.googlecode.android_scripting.activity;
     18 
     19 import android.app.ListActivity;
     20 import android.content.ComponentName;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.ServiceConnection;
     24 import android.os.Bundle;
     25 import android.os.IBinder;
     26 import android.view.ContextMenu;
     27 import android.view.ContextMenu.ContextMenuInfo;
     28 import android.view.LayoutInflater;
     29 import android.view.Menu;
     30 import android.view.MenuItem;
     31 import android.view.View;
     32 import android.view.ViewGroup;
     33 import android.widget.AdapterView;
     34 import android.widget.BaseAdapter;
     35 import android.widget.ListView;
     36 import android.widget.TextView;
     37 
     38 import com.googlecode.android_scripting.Constants;
     39 import com.googlecode.android_scripting.Log;
     40 import com.googlecode.android_scripting.R;
     41 import com.googlecode.android_scripting.interpreter.InterpreterProcess;
     42 
     43 import java.util.List;
     44 import java.util.Timer;
     45 import java.util.TimerTask;
     46 
     47 import org.connectbot.ConsoleActivity;
     48 
     49 /**
     50  * An activity that allows to monitor running scripts.
     51  *
     52  */
     53 public class ScriptProcessMonitor extends ListActivity {
     54 
     55   private final static int UPDATE_INTERVAL_SECS = 1;
     56 
     57   private final Timer mTimer = new Timer();
     58 
     59   private volatile ScriptingLayerService mService;
     60 
     61   private ScriptListAdapter mUpdater;
     62   private List<InterpreterProcess> mProcessList;
     63   private ScriptMonitorAdapter mAdapter;
     64   private boolean mIsConnected = false;
     65 
     66   private ServiceConnection mConnection = new ServiceConnection() {
     67     @Override
     68     public void onServiceConnected(ComponentName name, IBinder service) {
     69       mService = ((ScriptingLayerService.LocalBinder) service).getService();
     70       mUpdater = new ScriptListAdapter();
     71       mTimer.scheduleAtFixedRate(mUpdater, 0, UPDATE_INTERVAL_SECS * 1000);
     72       mIsConnected = true;
     73     }
     74 
     75     @Override
     76     public void onServiceDisconnected(ComponentName name) {
     77       mService = null;
     78       mIsConnected = false;
     79       mProcessList = null;
     80       mAdapter.notifyDataSetChanged();
     81     }
     82   };
     83 
     84   @Override
     85   public void onCreate(Bundle savedInstanceState) {
     86     super.onCreate(savedInstanceState);
     87     bindService(new Intent(this, ScriptingLayerService.class), mConnection, 0);
     88     CustomizeWindow.requestCustomTitle(this, "Script Monitor", R.layout.script_monitor);
     89     mAdapter = new ScriptMonitorAdapter();
     90     setListAdapter(mAdapter);
     91     registerForContextMenu(getListView());
     92   }
     93 
     94   @Override
     95   public void onPause() {
     96     super.onPause();
     97     if (mUpdater != null) {
     98       mUpdater.cancel();
     99     }
    100     mTimer.purge();
    101   }
    102 
    103   @Override
    104   public void onResume() {
    105     super.onResume();
    106     if (mIsConnected) {
    107       try {
    108         mUpdater = new ScriptListAdapter();
    109         mTimer.scheduleAtFixedRate(mUpdater, 0, UPDATE_INTERVAL_SECS * 1000);
    110       } catch (IllegalStateException e) {
    111         Log.e(e.getMessage(), e);
    112       }
    113     }
    114   }
    115 
    116   @Override
    117   public void onDestroy() {
    118     super.onDestroy();
    119     mTimer.cancel();
    120     unbindService(mConnection);
    121   }
    122 
    123   @Override
    124   protected void onListItemClick(ListView list, View view, int position, long id) {
    125     final InterpreterProcess script = (InterpreterProcess) list.getItemAtPosition(position);
    126     Intent intent = new Intent(this, ConsoleActivity.class);
    127     intent.putExtra(Constants.EXTRA_PROXY_PORT, script.getPort());
    128     startActivity(intent);
    129   }
    130 
    131   @Override
    132   public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo) {
    133     menu.add(Menu.NONE, 0, Menu.NONE, "Stop");
    134   }
    135 
    136   @Override
    137   public boolean onContextItemSelected(MenuItem item) {
    138     AdapterView.AdapterContextMenuInfo info;
    139     try {
    140       info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    141     } catch (ClassCastException e) {
    142       Log.e("Bad menuInfo", e);
    143       return false;
    144     }
    145 
    146     InterpreterProcess script = mAdapter.getItem(info.position);
    147     if (script == null) {
    148       Log.v("No script selected.");
    149       return false;
    150     }
    151 
    152     Intent intent = new Intent(ScriptProcessMonitor.this, ScriptingLayerService.class);
    153     intent.setAction(Constants.ACTION_KILL_PROCESS);
    154     intent.putExtra(Constants.EXTRA_PROXY_PORT, script.getPort());
    155     startService(intent);
    156 
    157     return true;
    158   }
    159 
    160   @Override
    161   public boolean onPrepareOptionsMenu(Menu menu) {
    162     menu.clear();
    163     // TODO(damonkohler): How could mProcessList ever be null?
    164     if (mProcessList != null && !mProcessList.isEmpty()) {
    165       menu.add(Menu.NONE, 0, Menu.NONE, R.string.stop_all).setIcon(
    166           android.R.drawable.ic_menu_close_clear_cancel);
    167     }
    168     return super.onPrepareOptionsMenu(menu);
    169   }
    170 
    171   @Override
    172   public boolean onOptionsItemSelected(MenuItem item) {
    173     Intent intent = new Intent(this, ScriptingLayerService.class);
    174     intent.setAction(Constants.ACTION_KILL_ALL);
    175     startService(intent);
    176     return true;
    177   }
    178 
    179   private class ScriptListAdapter extends TimerTask {
    180     private int mmExpectedModCount = 0;
    181     private volatile List<InterpreterProcess> mmList;
    182 
    183     @Override
    184     public void run() {
    185       if (mService == null) {
    186         mmList.clear();
    187         mTimer.cancel();
    188       } else {
    189         int freshModCount = mService.getModCount();
    190         if (freshModCount != mmExpectedModCount) {
    191           mmExpectedModCount = freshModCount;
    192           mmList = mService.getScriptProcessesList();
    193         }
    194       }
    195       runOnUiThread(new Runnable() {
    196         public void run() {
    197           mProcessList = mUpdater.getFreshProcessList();
    198           mAdapter.notifyDataSetChanged();
    199         }
    200       });
    201     }
    202 
    203     private List<InterpreterProcess> getFreshProcessList() {
    204       return mmList;
    205     }
    206   }
    207 
    208   private class ScriptMonitorAdapter extends BaseAdapter {
    209 
    210     @Override
    211     public int getCount() {
    212       if (mProcessList == null) {
    213         return 0;
    214       }
    215       return mProcessList.size();
    216     }
    217 
    218     @Override
    219     public InterpreterProcess getItem(int position) {
    220       return mProcessList.get(position);
    221     }
    222 
    223     @Override
    224     public long getItemId(int position) {
    225       return position;
    226     }
    227 
    228     @Override
    229     public View getView(int position, View convertView, ViewGroup parent) {
    230       View itemView;
    231       if (convertView == null) {
    232         LayoutInflater inflater =
    233             (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    234         itemView = inflater.inflate(R.layout.script_monitor_list_item, parent, false);
    235       } else {
    236         itemView = convertView;
    237       }
    238       InterpreterProcess process = mProcessList.get(position);
    239       ((TextView) itemView.findViewById(R.id.process_title)).setText(process.getName());
    240       ((TextView) itemView.findViewById(R.id.process_age)).setText(process.getUptime());
    241       ((TextView) itemView.findViewById(R.id.process_details)).setText(process.getHost() + ":"
    242           + process.getPort());
    243       ((TextView) itemView.findViewById(R.id.process_status)).setText("PID " + process.getPid());
    244       return itemView;
    245     }
    246   }
    247 }
    248