1/*
2 * Copyright (C) 2012 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
17package android.bordeaux.services;
18
19import android.content.ComponentName;
20import android.content.Context;
21import android.content.Intent;
22import android.content.ServiceConnection;
23import android.graphics.Canvas;
24import android.graphics.Paint;
25import android.graphics.PointF;
26import android.os.Bundle;
27import android.os.Handler;
28import android.os.IBinder;
29import android.os.Message;
30import android.os.Process;
31import android.os.RemoteException;
32import android.util.Log;
33
34/**
35 * {@hide}
36 * This is used to provide a convenience to access the actual remote running
37 * service.
38 * TODO: Eventally the remote service will be running in the system server, and
39 * this will need to be served as a stub for the remote running service. And
40 * extends from IBordeauxManager.stub
41 */
42public class BordeauxManagerService {
43
44    static private final String TAG = "BordeauxMangerService";
45    static private IBordeauxService mService = null;
46    static private ILearning_StochasticLinearRanker mRanker = null;
47    static private IAggregatorManager mAggregatorManager = null;
48    static private IPredictor mPredictor = null;
49    static private ILearning_MulticlassPA mClassifier = null;
50    static private boolean mStarted = false;
51
52    public BordeauxManagerService() {
53    }
54
55    static private synchronized void bindServices(Context context) {
56        if (mStarted) return;
57        context.bindService(new Intent(IBordeauxService.class.getName()),
58               mConnection, Context.BIND_AUTO_CREATE);
59        mStarted = true;
60    }
61
62    // Call the release, before the Context gets destroyed.
63    static public synchronized void release(Context context) {
64        if (mStarted && mConnection != null) {
65            context.unbindService(mConnection);
66            mService = null;
67            mStarted = false;
68        }
69    }
70
71    static public synchronized IBordeauxService getService(Context context) {
72        if (mService == null) bindServices(context);
73        return mService;
74    }
75
76    static public synchronized IAggregatorManager getAggregatorManager(Context context) {
77        if (mService == null) {
78            bindServices(context);
79            return null;
80        }
81        try {
82            mAggregatorManager = IAggregatorManager.Stub.asInterface(
83                    mService.getAggregatorManager());
84        } catch (RemoteException e) {
85            mAggregatorManager = null;
86        }
87        return mAggregatorManager;
88    }
89
90    static public synchronized IPredictor getPredictor(Context context, String name) {
91        if (mService == null) {
92            bindServices(context);
93            return null;
94        }
95        try {
96            mPredictor = IPredictor.Stub.asInterface(mService.getPredictor(name));
97        } catch (RemoteException e) {
98            mPredictor = null;
99        }
100        return mPredictor;
101    }
102
103    static public synchronized ILearning_StochasticLinearRanker
104            getRanker(Context context, String name) {
105        if (mService == null) {
106            bindServices(context);
107            return null;
108        }
109        try {
110            mRanker =
111                    ILearning_StochasticLinearRanker.Stub.asInterface(
112                            mService.getRanker(name));
113        } catch (RemoteException e) {
114            mRanker = null;
115        }
116        return mRanker;
117    }
118
119    static public synchronized ILearning_MulticlassPA
120            getClassifier(Context context, String name) {
121        if (mService == null) {
122            bindServices(context);
123            return null;
124        }
125        try {
126            mClassifier =
127                    ILearning_MulticlassPA.Stub.asInterface(mService.getClassifier(name));
128        } catch (RemoteException e) {
129            mClassifier = null;
130        }
131        return mClassifier;
132    }
133
134    /**
135     * Class for interacting with the main interface of the service.
136     */
137    static private ServiceConnection mConnection = new ServiceConnection() {
138        public void onServiceConnected(ComponentName className,
139                IBinder service) {
140            // This is called when the connection with the service has been
141            // established.
142            mService = IBordeauxService.Stub.asInterface(service);
143        }
144
145        public void onServiceDisconnected(ComponentName className) {
146            // This is called when the connection with the service has been
147            // unexpectedly disconnected -- that is, its process crashed.
148            mService = null;
149            mStarted = false; // needs to bind again
150        }
151    };
152}
153