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
63    // Call the release, before the Context gets destroyed.
64    static public synchronized void release(Context context) {
65        if (mStarted && mConnection != null) {
66            context.unbindService(mConnection);
67            mService = null;
68            mStarted = false;
69        }
70    }
71
72    static public synchronized IBordeauxService getService(Context context) {
73        if (mService == null) bindServices(context);
74        return mService;
75    }
76
77    static public synchronized IAggregatorManager getAggregatorManager(Context context) {
78        if (mService == null) {
79            bindServices(context);
80            return null;
81        }
82        try {
83            mAggregatorManager = IAggregatorManager.Stub.asInterface(
84                    mService.getAggregatorManager());
85        } catch (RemoteException e) {
86            mAggregatorManager = null;
87        }
88        return mAggregatorManager;
89    }
90
91    static public synchronized IPredictor getPredictor(Context context, String name) {
92        if (mService == null) {
93            bindServices(context);
94            return null;
95        }
96        try {
97            mPredictor = IPredictor.Stub.asInterface(mService.getPredictor(name));
98        } catch (RemoteException e) {
99            mPredictor = null;
100        }
101        return mPredictor;
102    }
103
104    static public synchronized ILearning_StochasticLinearRanker
105            getRanker(Context context, String name) {
106        if (mService == null) {
107            bindServices(context);
108            return null;
109        }
110        try {
111            mRanker =
112                    ILearning_StochasticLinearRanker.Stub.asInterface(
113                            mService.getRanker(name));
114        } catch (RemoteException e) {
115            mRanker = null;
116        }
117        return mRanker;
118    }
119
120    static public synchronized ILearning_MulticlassPA
121            getClassifier(Context context, String name) {
122        if (mService == null) {
123            bindServices(context);
124            return null;
125        }
126        try {
127            mClassifier =
128                    ILearning_MulticlassPA.Stub.asInterface(mService.getClassifier(name));
129        } catch (RemoteException e) {
130            mClassifier = null;
131        }
132        return mClassifier;
133    }
134
135    /**
136     * Class for interacting with the main interface of the service.
137     */
138    static private ServiceConnection mConnection = new ServiceConnection() {
139        public void onServiceConnected(ComponentName className,
140                IBinder service) {
141            // This is called when the connection with the service has been
142            // established.
143            mService = IBordeauxService.Stub.asInterface(service);
144        }
145
146        public void onServiceDisconnected(ComponentName className) {
147            // This is called when the connection with the service has been
148            // unexpectedly disconnected -- that is, its process crashed.
149            mService = null;
150            mStarted = false; // needs to bind again
151        }
152    };
153}
154