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1 | sbool parallelMap2_debug; |
2 | |
3 | // Note: an executor passed in is not shut down |
4 | |
5 | static <A, B> L<B> parallelMap2(ThreadPoolExecutor executor default null, Collection<A> l, F1<A, B> f) {
|
6 | if (l(l) <= 1) |
7 | ret map(f, l); |
8 | ret parallelMap2(executor, iterator(l), l(l), f); |
9 | } |
10 | |
11 | static <A, B> L<B> parallelMap2(ThreadPoolExecutor executor default null, Iterator<A> it, final int count, final F1<A, B> f) ctex {
|
12 | if (executor == null && coresToUse_fixed() == 1) |
13 | ret map(f, iterable(it)); |
14 | |
15 | ThreadPoolExecutor e = executor == null ? defaultThreadPoolExecutor() : executor; |
16 | |
17 | L<Future<B>> futures = emptyList(count); |
18 | new Var<Throwable> error; |
19 | if (parallelMap2_debug) |
20 | print("parallelMap2: " + count + " elements, " + e.getMaximumPoolSize() + " threads");
|
21 | |
22 | long time = sysNow(); |
23 | try {
|
24 | int i = 0; |
25 | for (final A o : iterable(it)) {
|
26 | ++i; |
27 | final int _i = i; |
28 | futures.add(e.submit(() -> {
|
29 | try {
|
30 | ret callF(f, o); |
31 | } catch e2 {
|
32 | error.set(e2); |
33 | null; |
34 | } |
35 | })); |
36 | } |
37 | /*if (parallelMap2_debug) |
38 | print("parallelMap2: scheduling done after " + (sysNow()-time));*/
|
39 | L<B> out = getFutures(futures); |
40 | if (error.has()) |
41 | throw rethrow(error!); |
42 | if (parallelMap2_debug) |
43 | print("parallelMap2: main done after " + (sysNow()-time));
|
44 | ret out; |
45 | } finally {
|
46 | if (executor == null) e.shutdown(); |
47 | } |
48 | } |
49 | |
50 | static <A, B> L<B> lambdaMapLike parallelMap2(IF1<A, B> f, Cl<A> l) {
|
51 | ret parallelMap2(l, if1ToF1(f)); |
52 | } |
Began life as a copy of #1011925
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| Snippet ID: | #1015446 |
| Snippet name: | parallelMap2 |
| Eternal ID of this version: | #1015446/23 |
| Text MD5: | 63049ad9c74bd3d86eca5ea14399f449 |
| Transpilation MD5: | 824fa5596d60f016b8a1058247d2a761 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-01-07 03:07:42 |
| Source code size: | 1574 bytes / 52 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 385 / 479 |
| Version history: | 22 change(s) |
| Referenced in: | [show references] |