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 | |
package com.sun.javafx.runtime.async; |
27 | |
|
28 | |
import java.util.concurrent.Callable; |
29 | |
import java.util.concurrent.ExecutionException; |
30 | |
import java.util.concurrent.FutureTask; |
31 | |
|
32 | |
import com.sun.javafx.runtime.Entry; |
33 | |
|
34 | |
|
35 | |
|
36 | |
|
37 | |
|
38 | |
|
39 | |
|
40 | |
|
41 | |
|
42 | |
|
43 | |
|
44 | |
|
45 | |
|
46 | 0 | public abstract class AbstractAsyncOperation<V> implements Callable<V> { |
47 | |
|
48 | |
private final FutureTask<V> future; |
49 | |
protected final AsyncOperationListener listener; |
50 | |
|
51 | 0 | private int progressGranularity = 100; |
52 | |
private int progressMax, lastProgress, progressIncrement, nextProgress, bytesRead; |
53 | |
|
54 | 0 | protected AbstractAsyncOperation(final AsyncOperationListener<V> listener) { |
55 | 0 | this.listener = listener; |
56 | |
|
57 | 0 | Callable<V> callable = new Callable<V>() { |
58 | |
public V call() throws Exception { |
59 | 0 | return AbstractAsyncOperation.this.call(); |
60 | |
} |
61 | |
}; |
62 | |
|
63 | 0 | final Runnable completionRunnable = new Runnable() { |
64 | |
public void run() { |
65 | 0 | if (future.isCancelled()) { |
66 | 0 | listener.onCancel(); |
67 | |
} |
68 | |
else |
69 | |
try { |
70 | 0 | listener.onCompletion(future.get()); |
71 | |
} |
72 | 0 | catch (InterruptedException e) { |
73 | 0 | listener.onCancel(); |
74 | |
} |
75 | 0 | catch (ExecutionException e) { |
76 | 0 | listener.onException(e); |
77 | 0 | } |
78 | 0 | } |
79 | |
}; |
80 | |
|
81 | 0 | future = new FutureTask<V>(callable) { |
82 | |
@Override |
83 | |
protected void done() { |
84 | |
try { |
85 | 0 | Entry.deferTask(completionRunnable); |
86 | |
} |
87 | |
finally { |
88 | 0 | super.done(); |
89 | 0 | } |
90 | 0 | } |
91 | |
}; |
92 | 0 | } |
93 | |
|
94 | |
public boolean isCancelled() { |
95 | 0 | return future.isCancelled(); |
96 | |
} |
97 | |
|
98 | |
public boolean isDone() { |
99 | 0 | return future.isDone(); |
100 | |
} |
101 | |
|
102 | |
public void cancel() { |
103 | 0 | future.cancel(true); |
104 | 0 | } |
105 | |
|
106 | |
public void start() { |
107 | 0 | BackgroundExecutor.getExecutor().execute(future); |
108 | 0 | } |
109 | |
|
110 | |
protected void notifyProgress() { |
111 | 0 | final int last = lastProgress; |
112 | 0 | final int max = progressMax; |
113 | 0 | Entry.deferTask(new Runnable() { |
114 | |
public void run() { |
115 | 0 | listener.onProgress(last, max); |
116 | 0 | } |
117 | |
}); |
118 | 0 | } |
119 | |
|
120 | |
protected void addProgress(int amount) { |
121 | 0 | bytesRead += amount; |
122 | 0 | if (bytesRead > nextProgress) { |
123 | 0 | lastProgress = bytesRead; |
124 | 0 | notifyProgress(); |
125 | 0 | nextProgress = ((lastProgress / progressIncrement) + 1) * progressIncrement; |
126 | |
} |
127 | 0 | } |
128 | |
|
129 | |
protected int getProgressMax() { |
130 | 0 | return progressMax; |
131 | |
} |
132 | |
|
133 | |
protected void setProgressMax(int progressMax) { |
134 | 0 | if (progressMax == 0) { |
135 | 0 | progressIncrement = progressGranularity; |
136 | |
} |
137 | 0 | else if (progressMax == -1) { |
138 | 0 | progressIncrement = progressGranularity; |
139 | |
} |
140 | |
else { |
141 | 0 | this.progressMax = progressMax; |
142 | 0 | progressIncrement = progressMax / progressGranularity; |
143 | |
} |
144 | 0 | nextProgress = ((lastProgress / progressIncrement) + 1) * progressIncrement; |
145 | 0 | notifyProgress(); |
146 | 0 | } |
147 | |
|
148 | |
protected int getProgressGranularity() { |
149 | 0 | return progressGranularity; |
150 | |
} |
151 | |
|
152 | |
protected void setProgressGranularity(int progressGranularity) { |
153 | 0 | this.progressGranularity = progressGranularity; |
154 | 0 | progressIncrement = progressMax / progressGranularity; |
155 | 0 | nextProgress = ((lastProgress / progressIncrement) + 1) * progressIncrement; |
156 | 0 | notifyProgress(); |
157 | 0 | } |
158 | |
|
159 | |
} |