876 |
|
assertEquals(1, a.get()); |
877 |
|
}} |
878 |
|
|
879 |
+ |
/** |
880 |
+ |
* If an "exceptionally action" throws an exception, it completes |
881 |
+ |
* exceptionally with that exception |
882 |
+ |
*/ |
883 |
|
public void testExceptionally_exceptionalCompletionActionFailed() { |
884 |
|
for (boolean createIncomplete : new boolean[] { true, false }) |
885 |
|
{ |
898 |
|
if (createIncomplete) f.completeExceptionally(ex1); |
899 |
|
|
900 |
|
checkCompletedWithWrappedException(g, ex2); |
901 |
+ |
checkCompletedExceptionally(f, ex1); |
902 |
|
assertEquals(1, a.get()); |
903 |
|
}} |
904 |
|
|
916 |
|
if (!createIncomplete) assertTrue(f.complete(v1)); |
917 |
|
final CompletableFuture<Integer> g = m.whenComplete |
918 |
|
(f, |
919 |
< |
(Integer x, Throwable t) -> { |
919 |
> |
(Integer result, Throwable t) -> { |
920 |
|
m.checkExecutionMode(); |
921 |
< |
threadAssertSame(x, v1); |
921 |
> |
threadAssertSame(result, v1); |
922 |
|
threadAssertNull(t); |
923 |
|
a.getAndIncrement(); |
924 |
|
}); |
943 |
|
if (!createIncomplete) f.completeExceptionally(ex); |
944 |
|
final CompletableFuture<Integer> g = m.whenComplete |
945 |
|
(f, |
946 |
< |
(Integer x, Throwable t) -> { |
946 |
> |
(Integer result, Throwable t) -> { |
947 |
|
m.checkExecutionMode(); |
948 |
< |
threadAssertNull(x); |
948 |
> |
threadAssertNull(result); |
949 |
|
threadAssertSame(t, ex); |
950 |
|
a.getAndIncrement(); |
951 |
|
}); |
970 |
|
if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning)); |
971 |
|
final CompletableFuture<Integer> g = m.whenComplete |
972 |
|
(f, |
973 |
< |
(Integer x, Throwable t) -> { |
973 |
> |
(Integer result, Throwable t) -> { |
974 |
|
m.checkExecutionMode(); |
975 |
< |
threadAssertNull(x); |
975 |
> |
threadAssertNull(result); |
976 |
|
threadAssertTrue(t instanceof CancellationException); |
977 |
|
a.getAndIncrement(); |
978 |
|
}); |
987 |
|
* If a whenComplete action throws an exception when triggered by |
988 |
|
* a normal completion, it completes exceptionally |
989 |
|
*/ |
990 |
< |
public void testWhenComplete_actionFailed() { |
990 |
> |
public void testWhenComplete_sourceCompletedNormallyActionFailed() { |
991 |
|
for (boolean createIncomplete : new boolean[] { true, false }) |
992 |
|
for (ExecutionMode m : ExecutionMode.values()) |
993 |
|
for (Integer v1 : new Integer[] { 1, null }) |
998 |
|
if (!createIncomplete) assertTrue(f.complete(v1)); |
999 |
|
final CompletableFuture<Integer> g = m.whenComplete |
1000 |
|
(f, |
1001 |
< |
(Integer x, Throwable t) -> { |
1001 |
> |
(Integer result, Throwable t) -> { |
1002 |
|
m.checkExecutionMode(); |
1003 |
< |
threadAssertSame(x, v1); |
1003 |
> |
threadAssertSame(result, v1); |
1004 |
|
threadAssertNull(t); |
1005 |
|
a.getAndIncrement(); |
1006 |
|
throw ex; |
1015 |
|
/** |
1016 |
|
* If a whenComplete action throws an exception when triggered by |
1017 |
|
* a source completion that also throws an exception, the source |
1018 |
< |
* exception takes precedence. |
1018 |
> |
* exception takes precedence (unlike handle) |
1019 |
|
*/ |
1020 |
< |
public void testWhenComplete_actionFailedSourceFailed() { |
1020 |
> |
public void testWhenComplete_sourceFailedActionFailed() { |
1021 |
|
for (boolean createIncomplete : new boolean[] { true, false }) |
1022 |
|
for (ExecutionMode m : ExecutionMode.values()) |
1023 |
|
{ |
1029 |
|
if (!createIncomplete) f.completeExceptionally(ex1); |
1030 |
|
final CompletableFuture<Integer> g = m.whenComplete |
1031 |
|
(f, |
1032 |
< |
(Integer x, Throwable t) -> { |
1032 |
> |
(Integer result, Throwable t) -> { |
1033 |
|
m.checkExecutionMode(); |
1034 |
|
threadAssertSame(t, ex1); |
1035 |
< |
threadAssertNull(x); |
1035 |
> |
threadAssertNull(result); |
1036 |
|
a.getAndIncrement(); |
1037 |
|
throw ex2; |
1038 |
|
}); |
1057 |
|
if (!createIncomplete) assertTrue(f.complete(v1)); |
1058 |
|
final CompletableFuture<Integer> g = m.handle |
1059 |
|
(f, |
1060 |
< |
(Integer x, Throwable t) -> { |
1060 |
> |
(Integer result, Throwable t) -> { |
1061 |
|
m.checkExecutionMode(); |
1062 |
< |
threadAssertSame(x, v1); |
1062 |
> |
threadAssertSame(result, v1); |
1063 |
|
threadAssertNull(t); |
1064 |
|
a.getAndIncrement(); |
1065 |
|
return inc(v1); |
1086 |
|
if (!createIncomplete) f.completeExceptionally(ex); |
1087 |
|
final CompletableFuture<Integer> g = m.handle |
1088 |
|
(f, |
1089 |
< |
(Integer x, Throwable t) -> { |
1089 |
> |
(Integer result, Throwable t) -> { |
1090 |
|
m.checkExecutionMode(); |
1091 |
< |
threadAssertNull(x); |
1091 |
> |
threadAssertNull(result); |
1092 |
|
threadAssertSame(t, ex); |
1093 |
|
a.getAndIncrement(); |
1094 |
|
return v1; |
1115 |
|
if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning)); |
1116 |
|
final CompletableFuture<Integer> g = m.handle |
1117 |
|
(f, |
1118 |
< |
(Integer x, Throwable t) -> { |
1118 |
> |
(Integer result, Throwable t) -> { |
1119 |
|
m.checkExecutionMode(); |
1120 |
< |
threadAssertNull(x); |
1120 |
> |
threadAssertNull(result); |
1121 |
|
threadAssertTrue(t instanceof CancellationException); |
1122 |
|
a.getAndIncrement(); |
1123 |
|
return v1; |
1130 |
|
}} |
1131 |
|
|
1132 |
|
/** |
1133 |
< |
* handle result completes exceptionally if action does |
1133 |
> |
* If a "handle action" throws an exception when triggered by |
1134 |
> |
* a normal completion, it completes exceptionally |
1135 |
|
*/ |
1136 |
< |
public void testHandle_sourceFailedActionFailed() { |
1136 |
> |
public void testHandle_sourceCompletedNormallyActionFailed() { |
1137 |
|
for (ExecutionMode m : ExecutionMode.values()) |
1138 |
|
for (boolean createIncomplete : new boolean[] { true, false }) |
1139 |
+ |
for (Integer v1 : new Integer[] { 1, null }) |
1140 |
|
{ |
1141 |
|
final CompletableFuture<Integer> f = new CompletableFuture<>(); |
1142 |
|
final AtomicInteger a = new AtomicInteger(0); |
1143 |
< |
final CFException ex1 = new CFException(); |
1144 |
< |
final CFException ex2 = new CFException(); |
1138 |
< |
if (!createIncomplete) f.completeExceptionally(ex1); |
1143 |
> |
final CFException ex = new CFException(); |
1144 |
> |
if (!createIncomplete) assertTrue(f.complete(v1)); |
1145 |
|
final CompletableFuture<Integer> g = m.handle |
1146 |
|
(f, |
1147 |
< |
(Integer x, Throwable t) -> { |
1147 |
> |
(Integer result, Throwable t) -> { |
1148 |
|
m.checkExecutionMode(); |
1149 |
< |
threadAssertNull(x); |
1150 |
< |
threadAssertSame(ex1, t); |
1149 |
> |
threadAssertSame(result, v1); |
1150 |
> |
threadAssertNull(t); |
1151 |
|
a.getAndIncrement(); |
1152 |
< |
throw ex2; |
1152 |
> |
throw ex; |
1153 |
|
}); |
1154 |
< |
if (createIncomplete) f.completeExceptionally(ex1); |
1154 |
> |
if (createIncomplete) assertTrue(f.complete(v1)); |
1155 |
|
|
1156 |
< |
checkCompletedWithWrappedException(g, ex2); |
1157 |
< |
checkCompletedExceptionally(f, ex1); |
1156 |
> |
checkCompletedWithWrappedException(g, ex); |
1157 |
> |
checkCompletedNormally(f, v1); |
1158 |
|
assertEquals(1, a.get()); |
1159 |
|
}} |
1160 |
|
|
1161 |
< |
public void testHandle_sourceCompletedNormallyActionFailed() { |
1162 |
< |
for (ExecutionMode m : ExecutionMode.values()) |
1161 |
> |
/** |
1162 |
> |
* If a "handle action" throws an exception when triggered by |
1163 |
> |
* a source completion that also throws an exception, the action |
1164 |
> |
* exception takes precedence (unlike whenComplete) |
1165 |
> |
*/ |
1166 |
> |
public void testHandle_sourceFailedActionFailed() { |
1167 |
|
for (boolean createIncomplete : new boolean[] { true, false }) |
1168 |
< |
for (Integer v1 : new Integer[] { 1, null }) |
1168 |
> |
for (ExecutionMode m : ExecutionMode.values()) |
1169 |
|
{ |
1160 |
– |
final CompletableFuture<Integer> f = new CompletableFuture<>(); |
1170 |
|
final AtomicInteger a = new AtomicInteger(0); |
1171 |
< |
final CFException ex = new CFException(); |
1172 |
< |
if (!createIncomplete) assertTrue(f.complete(v1)); |
1171 |
> |
final CFException ex1 = new CFException(); |
1172 |
> |
final CFException ex2 = new CFException(); |
1173 |
> |
final CompletableFuture<Integer> f = new CompletableFuture<>(); |
1174 |
> |
|
1175 |
> |
if (!createIncomplete) f.completeExceptionally(ex1); |
1176 |
|
final CompletableFuture<Integer> g = m.handle |
1177 |
|
(f, |
1178 |
< |
(Integer x, Throwable t) -> { |
1178 |
> |
(Integer result, Throwable t) -> { |
1179 |
|
m.checkExecutionMode(); |
1180 |
< |
threadAssertSame(x, v1); |
1181 |
< |
threadAssertNull(t); |
1180 |
> |
threadAssertNull(result); |
1181 |
> |
threadAssertSame(ex1, t); |
1182 |
|
a.getAndIncrement(); |
1183 |
< |
throw ex; |
1183 |
> |
throw ex2; |
1184 |
|
}); |
1185 |
< |
if (createIncomplete) assertTrue(f.complete(v1)); |
1185 |
> |
if (createIncomplete) f.completeExceptionally(ex1); |
1186 |
|
|
1187 |
< |
checkCompletedWithWrappedException(g, ex); |
1188 |
< |
checkCompletedNormally(f, v1); |
1187 |
> |
checkCompletedWithWrappedException(g, ex2); |
1188 |
> |
checkCompletedExceptionally(f, ex1); |
1189 |
|
assertEquals(1, a.get()); |
1190 |
|
}} |
1191 |
|
|
3656 |
|
funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m))); |
3657 |
|
funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m))); |
3658 |
|
|
3659 |
< |
funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {})); |
3659 |
> |
funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {})); |
3660 |
|
|
3661 |
|
funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m))); |
3662 |
|
|
3776 |
|
} |
3777 |
|
|
3778 |
|
static class Monad { |
3779 |
< |
static class MonadError extends Error { |
3780 |
< |
public MonadError() { super("monadic zero"); } |
3779 |
> |
static class ZeroException extends RuntimeException { |
3780 |
> |
public ZeroException() { super("monadic zero"); } |
3781 |
|
} |
3782 |
|
// "return", "unit" |
3783 |
|
static <T> CompletableFuture<T> unit(T value) { |
3785 |
|
} |
3786 |
|
// monadic zero ? |
3787 |
|
static <T> CompletableFuture<T> zero() { |
3788 |
< |
return failedFuture(new MonadError()); |
3788 |
> |
return failedFuture(new ZeroException()); |
3789 |
|
} |
3790 |
|
// >=> |
3791 |
|
static <T,U,V> Function<T, CompletableFuture<V>> compose |
3799 |
|
f.getNow(null); |
3800 |
|
throw new AssertionFailedError("should throw"); |
3801 |
|
} catch (CompletionException success) { |
3802 |
< |
assertTrue(success.getCause() instanceof MonadError); |
3802 |
> |
assertTrue(success.getCause() instanceof ZeroException); |
3803 |
|
} |
3804 |
|
} |
3805 |
|
|
3826 |
|
AtomicReference<Throwable> firstFailure = new AtomicReference<>(null); |
3827 |
|
} |
3828 |
|
|
3829 |
< |
// Monadic "plus" |
3829 |
> |
/** Implements "monadic plus". */ |
3830 |
|
static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f, |
3831 |
|
CompletableFuture<? extends T> g) { |
3832 |
|
PlusFuture<T> plus = new PlusFuture<T>(); |
3833 |
|
BiConsumer<T, Throwable> action = (T result, Throwable ex) -> { |
3834 |
< |
if (result != null) { |
3835 |
< |
if (plus.complete(result)) |
3836 |
< |
if (plus.firstFailure.get() != null) |
3834 |
> |
try { |
3835 |
> |
if (ex == null) { |
3836 |
> |
if (plus.complete(result)) |
3837 |
> |
if (plus.firstFailure.get() != null) |
3838 |
> |
plus.firstFailure.set(null); |
3839 |
> |
} |
3840 |
> |
else if (plus.firstFailure.compareAndSet(null, ex)) { |
3841 |
> |
if (plus.isDone()) |
3842 |
|
plus.firstFailure.set(null); |
3843 |
< |
} |
3844 |
< |
else if (plus.firstFailure.compareAndSet(null, ex)) { |
3845 |
< |
if (plus.isDone()) |
3846 |
< |
plus.firstFailure.set(null); |
3847 |
< |
} else { |
3848 |
< |
if (plus.completeExceptionally(ex)) |
3849 |
< |
plus.firstFailure.set(null); |
3843 |
> |
} |
3844 |
> |
else { |
3845 |
> |
// first failure has precedence |
3846 |
> |
Throwable first = plus.firstFailure.getAndSet(null); |
3847 |
> |
|
3848 |
> |
// may fail with "Self-suppression not permitted" |
3849 |
> |
try { first.addSuppressed(ex); } |
3850 |
> |
catch (Exception ignored) {} |
3851 |
> |
|
3852 |
> |
plus.completeExceptionally(first); |
3853 |
> |
} |
3854 |
> |
} catch (Throwable unexpected) { |
3855 |
> |
plus.completeExceptionally(unexpected); |
3856 |
|
} |
3857 |
|
}; |
3858 |
|
f.whenComplete(action); |