-
Notifications
You must be signed in to change notification settings - Fork 12
/
LocalMessageManager.java
305 lines (268 loc) · 10.3 KB
/
LocalMessageManager.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
package eu.inloop.localmessagemanager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Handler.Callback;
import android.os.Looper;
import android.os.Message;
import android.support.annotation.AnyThread;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import android.util.SparseArray;
import java.util.ArrayList;
import java.util.List;
@SuppressWarnings({"WeakerAccess", "unused"})
@AnyThread
public class LocalMessageManager implements Callback {
@NonNull
private static final String TAG = "LocalMessageManager";
private static boolean DEBUG = false;
@Nullable
private static volatile LocalMessageManager sInstance = null;
@NonNull
private final Handler mHandler;
@NonNull
private final SparseArray<List<LocalMessageCallback>> mListenersSpecific;
@NonNull
private final List<LocalMessageCallback> mListenersUniversal;
@NonNull
private final List<LocalMessageCallback> mDefensiveCopyList = new ArrayList<>();
@NonNull
private LocalMessage mMessage;
@NonNull
public static LocalMessageManager getInstance() {
if (sInstance == null) {
synchronized (LocalMessageManager.class) {
if (sInstance == null) {
sInstance = new LocalMessageManager();
}
}
}
//noinspection ConstantConditions
return sInstance;
}
private LocalMessageManager() {
mHandler = new Handler(Looper.getMainLooper(), this);
mMessage = new LocalMessage(null);
mListenersUniversal = new ArrayList<>();
mListenersSpecific = new SparseArray<>();
}
/**
* Enable debug logging (such as confirmation of delivery, number of listeners etc.)
* @param debug - false by default
*/
public static void setDebug(final boolean debug) {
DEBUG = debug;
}
/**
* Sends an empty Message containing only the message ID.
* @param id - message ID
*/
public final void send(final int id) {
mHandler.sendEmptyMessage(id);
}
/**
* Sends a Message containing the ID and an arbitrary Object.
* @param id - message ID
* @param payload - arbitrary object
*/
public final void send(final int id, @NonNull final Object payload) {
mHandler.sendMessage(mHandler.obtainMessage(id, payload));
}
/**
* Sends a Message containing the ID and one integer argument.
* More effective than sending an arbitrary object.
* @param id - message ID
* @param arg1 - integer argument
*/
public final void send(final int id, final int arg1) {
mHandler.sendMessage(mHandler.obtainMessage(id, arg1, 0));
}
/**
* Sends a Message containing the ID and two integer arguments.
* More effective than sending an arbitrary object.
* @param id - message ID
* @param arg1 - integer argument
* @param arg2 - integer argument
*/
public final void send(final int id, final int arg1, final int arg2) {
mHandler.sendMessage(mHandler.obtainMessage(id, arg1, arg2));
}
/**
* Sends a Message containing the ID and a Bundle object.
* More effective than sending an arbitrary object.
* @param id - message ID
* @param bundle - bundle
*/
public final void send(final int id, @NonNull final Bundle bundle) {
mHandler.sendMessage(mHandler.obtainMessage(id, bundle));
}
/**
* Add listener for specific type of message by its ID.
* Don't forget to call {@link #removeListener(LocalMessageCallback)} or
* {@link #removeListeners(int)}
*
* @param id ID of message that will be only notified to listener
* @param listener listener
*/
public void addListener(int id, @NonNull final LocalMessageCallback listener) {
synchronized (mListenersSpecific) {
List<LocalMessageCallback> whatListofListeners = mListenersSpecific.get(id);
if (whatListofListeners == null) {
whatListofListeners = new ArrayList<>();
mListenersSpecific.put(id, whatListofListeners);
}
if (!whatListofListeners.contains(listener)) {
whatListofListeners.add(listener);
}
}
}
/**
* Add listener for all messages.
*
* @param listener listener
*/
public void addListener(@NonNull final LocalMessageCallback listener) {
synchronized (mListenersUniversal) {
if (!mListenersUniversal.contains(listener)) {
mListenersUniversal.add(listener);
} else {
if (DEBUG) {
Log.w(TAG, "Listener is already added. " + listener.toString());
}
}
}
}
/**
* Remove listener for all messages.
*
* @param listener The listener to remove.
*/
public void removeListener(@NonNull final LocalMessageCallback listener) {
synchronized (mListenersUniversal) {
if (mListenersUniversal.contains(listener)) {
mListenersUniversal.remove(listener);
} else {
if (DEBUG) {
Log.w(TAG, "Trying to remove a listener that is not registered. " + listener.toString());
}
}
}
}
/**
* Remove all listeners for desired message ID.
*
* @param id The id of the message to stop listening to.
*/
public void removeListeners(final int id) {
if (DEBUG) {
final List<LocalMessageCallback> callbacks = mListenersSpecific.get(id);
if (callbacks == null || callbacks.size() == 0) {
Log.w(TAG, "Trying to remove specific listeners that are not registerred. ID " + id);
}
}
synchronized (mListenersSpecific) {
mListenersSpecific.delete(id);
}
}
/**
* Remove the specific listener for desired message ID.
*
* @param id The id of the message to stop listening to.
* @param listener The listener which should be removed.
*/
public void removeListener(final int id, @NonNull final LocalMessageCallback listener) {
synchronized (mListenersSpecific) {
final List<LocalMessageCallback> callbacks = this.mListenersSpecific.get(id);
if (callbacks != null && !callbacks.isEmpty()) {
if (callbacks.contains(listener)) {
callbacks.remove(listener);
}
} else {
if (DEBUG) {
Log.w(TAG, "Trying to remove specific listener that is not registerred. ID " + id + ", " + listener);
}
}
}
}
/*
*
* @see android.os.Handler.Callback#handleMessage(android.os.Message)
*/
@Override
public boolean handleMessage(@NonNull final Message msg) {
mMessage.setMessage(msg);
if (DEBUG) {
logMessageHandling(mMessage);
}
// proces listeners for specified type of message what
synchronized (mListenersSpecific) {
final List<LocalMessageCallback> whatListofListeners = mListenersSpecific.get(msg.what);
if (whatListofListeners != null) {
if (whatListofListeners.size() == 0) {
mListenersSpecific.remove(msg.what);
} else {
mDefensiveCopyList.clear();
mDefensiveCopyList.addAll(whatListofListeners);
for (final LocalMessageCallback callback : mDefensiveCopyList) {
callback.handleMessage(mMessage);
}
}
}
}
// process universal listeners
synchronized (mListenersUniversal) {
mDefensiveCopyList.clear();
mDefensiveCopyList.addAll(mListenersUniversal);
for (final LocalMessageCallback callback : mDefensiveCopyList) {
callback.handleMessage(mMessage);
}
// leave the list empty - prevent leaks
mDefensiveCopyList.clear();
}
mMessage.setMessage(null);
return true;
}
private void logMessageHandling(@NonNull final LocalMessage msg) {
final List<LocalMessageCallback> whatListofListeners = mListenersSpecific.get(msg.getId());
if ((whatListofListeners == null || whatListofListeners.size() == 0) && mListenersUniversal.size() == 0) {
Log.w(TAG, "Delivering FAILED for message ID " + msg.getId() + ". No listeners. " + msg.toString());
} else {
final StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("Delivering message ID ");
stringBuilder.append(msg.getId());
stringBuilder.append(", Specific listeners: ");
if (whatListofListeners == null || whatListofListeners.size() == 0) {
stringBuilder.append(0);
} else {
stringBuilder.append(whatListofListeners.size());
stringBuilder.append(" [");
for (int i = 0; i < whatListofListeners.size(); i++) {
stringBuilder.append(whatListofListeners.get(i).getClass().getSimpleName());
if (i < whatListofListeners.size() - 1) {
stringBuilder.append(",");
}
}
stringBuilder.append("]");
}
stringBuilder.append(", Universal listeners: ");
synchronized (mListenersUniversal) {
if (mListenersUniversal.size() == 0) {
stringBuilder.append(0);
} else {
stringBuilder.append(mListenersUniversal.size());
stringBuilder.append(" [");
for (int i = 0; i < mListenersUniversal.size(); i++) {
stringBuilder.append(mListenersUniversal.get(i).getClass().getSimpleName());
if (i < mListenersUniversal.size() - 1) {
stringBuilder.append(",");
}
}
stringBuilder.append("], Message: ");
}
}
stringBuilder.append(msg.toString());
Log.v(TAG, stringBuilder.toString());
}
}
}