// debuging: Intellij issue to see variable:
// http://stackoverflow.com/questions/26895708/debugger-cannot-see-local-variable-in-a-lambda
/// vs anon class: variable visible. new instances??
// stack traces: we see "lambda" as method name. maybe meth reference? but closures are not
// possible ...
////////////////// read further:
// http://baddotrobot.com/blog/2014/02/18/method-references-in-java8/
@GET
public void findById(@QueryParam("id") int id, @Suspended AsyncResponse asyncResponse) {
asyncResponse.setTimeout(10, TimeUnit.SECONDS);
final CompletableFuture<Product> product = productDao.findNameById(id);
final CompletableFuture<ProductWithGroups> finalResult =
product.thenCompose(
productFound -> {
if (asyncResponse.isDone()) {
final CompletableFuture<ProductWithGroups> error = new CompletableFuture<>();
error.completeExceptionally(new IllegalStateException("Response already done"));
return error;
} else {
final CompletableFuture<List<ProductGroup>> productGroups =
productDao.findProductGroupsById(id);
return productGroups.thenApply(
productGroupsFound ->
ProductWithGroups.createProductWithGroups(
productFound, productGroupsFound));
}
});
finalResult.whenCompleteAsync(
(productWithGroups, error) -> {
consumeProductWithGroupOrError(asyncResponse, productWithGroups, error);
},
executorToCompleteCalls);
}
@Override
public CompletableFuture<Void> transactionDataFuture(int expectedTopologyId) {
if (transactionDataTopologyId >= expectedTopologyId) return CompletableFutures.completedNull();
if (trace) {
log.tracef(
"Waiting for transaction data for topology %d, current topology is %d",
expectedTopologyId, transactionDataTopologyId);
}
synchronized (this) {
if (transactionDataTopologyId >= expectedTopologyId) {
return CompletableFutures.completedNull();
} else {
return transactionDataFuture.thenCompose(nil -> transactionDataFuture(expectedTopologyId));
}
}
}
public static void main(String[] args) throws Exception {
CreateFunctionalMaps.main(args);
FunctionalMap.ReadOnlyMap<String, String> readOnlyMap = CreateFunctionalMaps.ro;
FunctionalMap.WriteOnlyMap<String, String> writeOnlyMap = CreateFunctionalMaps.wo;
FunctionalMap.ReadWriteMap<String, String> readWriteMap = CreateFunctionalMaps.rw;
CompletableFuture<Void> f0 =
writeOnlyMap.eval(
"key",
"value1",
(v, writeView) ->
writeView.set(
v, new MetaParam.MetaEntryVersion<>(new EntryVersion.NumericEntryVersion(1))));
CompletableFuture<Boolean> f1 =
f0.thenCompose(
x ->
readWriteMap.eval(
"key",
"value2",
(v, readWriteView) -> {
// .class does not give generics, so use a helper type() method
Class<MetaParam.MetaEntryVersion<Long>> clazz =
MetaParam.MetaEntryVersion.type();
Optional<MetaParam.MetaEntryVersion<Long>> metaParam =
readWriteView.findMetaParam(clazz);
return metaParam
.map(
metaVersion -> {
if (metaVersion
.get()
.compareTo(new EntryVersion.NumericEntryVersion(1))
== EQUAL) {
readWriteView.set(
"uno",
new MetaParam.MetaEntryVersion<>(
new EntryVersion.NumericEntryVersion(200)));
return true; // version matches
}
return false; // version does not match
})
.orElse(false); // version not present
}));
System.out.println(f1.get());
}
private static void test(ExecutorService executor) throws Throwable {
Thread.currentThread().setName("mainThread");
// ----------------------------------------------------------------
// supplyAsync tests
// ----------------------------------------------------------------
try {
CompletableFuture<String> cf = supplyAsync(() -> "a test string");
checkCompletedNormally(cf, cf.join());
cf = supplyAsync(() -> "a test string", commonPool());
checkCompletedNormally(cf, cf.join());
cf = supplyAsync(() -> "a test string", executor);
checkCompletedNormally(cf, cf.join());
cf =
supplyAsync(
() -> {
throw new RuntimeException();
});
checkCompletedExceptionally(cf);
cf =
supplyAsync(
() -> {
throw new RuntimeException();
},
commonPool());
checkCompletedExceptionally(cf);
cf =
supplyAsync(
() -> {
throw new RuntimeException();
},
executor);
checkCompletedExceptionally(cf);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// runAsync tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf = runAsync(() -> {});
checkCompletedNormally(cf, cf.join());
cf = runAsync(() -> {}, commonPool());
checkCompletedNormally(cf, cf.join());
cf = runAsync(() -> {}, executor);
checkCompletedNormally(cf, cf.join());
cf =
runAsync(
() -> {
throw new RuntimeException();
});
checkCompletedExceptionally(cf);
cf =
runAsync(
() -> {
throw new RuntimeException();
},
commonPool());
checkCompletedExceptionally(cf);
cf =
runAsync(
() -> {
throw new RuntimeException();
},
executor);
checkCompletedExceptionally(cf);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// explicit completion
// ----------------------------------------------------------------
try {
final Phaser phaser = new Phaser(1);
final int phase = phaser.getPhase();
CompletableFuture<Integer> cf;
cf =
supplyAsync(
() -> {
phaser.awaitAdvance(phase);
return 1;
});
cf.complete(2);
phaser.arrive();
checkCompletedNormally(cf, 2);
cf =
supplyAsync(
() -> {
phaser.awaitAdvance(phase + 1);
return 1;
});
cf.completeExceptionally(new Throwable());
phaser.arrive();
checkCompletedExceptionally(cf);
cf =
supplyAsync(
() -> {
phaser.awaitAdvance(phase + 2);
return 1;
});
cf.cancel(true);
phaser.arrive();
checkCompletedExceptionally(cf, true);
cf =
supplyAsync(
() -> {
phaser.awaitAdvance(phase + 3);
return 1;
});
check(cf.getNow(2) == 2);
phaser.arrive();
checkCompletedNormally(cf, 1);
check(cf.getNow(2) == 1);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenApplyXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenApply(
(x) -> {
if (x.equals("a test string")) return 1;
else return 0;
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenApplyAsync(
(x) -> {
if (x.equals("a test string")) return 1;
else return 0;
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenApplyAsync(
(x) -> {
if (x.equals("a test string")) return 1;
else return 0;
},
executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, 1);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenApply(
(x) -> {
return 0;
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenApplyAsync(
(x) -> {
return 0;
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenApplyAsync(
(x) -> {
return 0;
},
executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenAcceptXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf2;
int before = atomicInt.get();
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenAccept(
(x) -> {
if (x.equals("a test string")) {
atomicInt.incrementAndGet();
return;
}
throw new RuntimeException();
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenAcceptAsync(
(x) -> {
if (x.equals("a test string")) {
atomicInt.incrementAndGet();
return;
}
throw new RuntimeException();
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenAcceptAsync(
(x) -> {
if (x.equals("a test string")) {
atomicInt.incrementAndGet();
return;
}
throw new RuntimeException();
},
executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenAccept(
(x) -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenAcceptAsync(
(x) -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenAcceptAsync(
(x) -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenRunXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf2;
int before = atomicInt.get();
CompletableFuture<String> cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenRun(
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenRunAsync(
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> "a test string");
cf2 =
cf1.thenRunAsync(
() -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedNormally(cf1, "a test string");
checkCompletedNormally(cf2, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenRun(
() -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenRunAsync(
() -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenRunAsync(
() -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenCombineXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf3;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenCombine(
cf2,
(x, y) -> {
return x + y;
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenCombineAsync(
cf2,
(x, y) -> {
return x + y;
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenCombineAsync(
cf2,
(x, y) -> {
return x + y;
},
executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, 2);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenCombine(
cf2,
(x, y) -> {
return 0;
});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 1);
checkCompletedExceptionally(cf3);
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.thenCombineAsync(
cf2,
(x, y) -> {
return 0;
});
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.thenCombineAsync(
cf2,
(x, y) -> {
return 0;
},
executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenAcceptBothXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenAcceptBoth(
cf2,
(x, y) -> {
check(x + y == 2);
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenAcceptBothAsync(
cf2,
(x, y) -> {
check(x + y == 2);
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenAcceptBothAsync(
cf2,
(x, y) -> {
check(x + y == 2);
atomicInt.incrementAndGet();
},
executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 = supplyAsync(() -> 1);
cf3 =
cf1.thenAcceptBoth(
cf2,
(x, y) -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 1);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.thenAcceptBothAsync(
cf2,
(x, y) -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.thenAcceptBothAsync(
cf2,
(x, y) -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// runAfterBothXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 1);
cf3 =
cf1.runAfterBoth(
cf2,
() -> {
check(cf1.isDone());
check(cf2.isDone());
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cfa = supplyAsync(() -> 1);
CompletableFuture<Integer> cfb = supplyAsync(() -> 1);
cf3 =
cfa.runAfterBothAsync(
cfb,
() -> {
check(cfa.isDone());
check(cfb.isDone());
atomicInt.incrementAndGet();
});
checkCompletedNormally(cfa, 1);
checkCompletedNormally(cfb, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cfx = supplyAsync(() -> 1);
CompletableFuture<Integer> cfy = supplyAsync(() -> 1);
cf3 =
cfy.runAfterBothAsync(
cfx,
() -> {
check(cfx.isDone());
check(cfy.isDone());
atomicInt.incrementAndGet();
},
executor);
checkCompletedNormally(cfx, 1);
checkCompletedNormally(cfy, 1);
checkCompletedNormally(cf3, null);
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
CompletableFuture<Integer> cf4 =
supplyAsync(
() -> {
throw new RuntimeException();
});
CompletableFuture<Integer> cf5 = supplyAsync(() -> 1);
cf3 =
cf5.runAfterBothAsync(
cf4,
() -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedExceptionally(cf4);
checkCompletedNormally(cf5, 1);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
before = atomicInt.get();
cf4 = supplyAsync(() -> 1);
cf5 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf5.runAfterBothAsync(
cf4,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf4, 1);
checkCompletedExceptionally(cf5);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
before = atomicInt.get();
cf4 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf5 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf5.runAfterBoth(
cf4,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedExceptionally(cf4);
checkCompletedExceptionally(cf5);
checkCompletedExceptionally(cf3);
check(atomicInt.get() == before);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// applyToEitherXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf3;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
cf3 =
cf1.applyToEither(
cf2,
(x) -> {
check(x == 1 || x == 2);
return x;
});
checkCompletedNormally(cf3, new Object[] {1, 2});
check(cf1.isDone() || cf2.isDone());
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.applyToEitherAsync(
cf2,
(x) -> {
check(x == 1 || x == 2);
return x;
});
checkCompletedNormally(cf3, new Object[] {1, 2});
check(cf1.isDone() || cf2.isDone());
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.applyToEitherAsync(
cf2,
(x) -> {
check(x == 1 || x == 2);
return x;
},
executor);
checkCompletedNormally(cf3, new Object[] {1, 2});
check(cf1.isDone() || cf2.isDone());
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.applyToEither(
cf2,
(x) -> {
check(x == 2);
return x;
});
try {
check(cf3.join() == 2);
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.applyToEitherAsync(
cf2,
(x) -> {
check(x == 1);
return x;
});
try {
check(cf3.join() == 1);
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.applyToEitherAsync(
cf2,
(x) -> {
fail();
return x;
});
checkCompletedExceptionally(cf3);
check(cf1.isDone() || cf2.isDone());
final Phaser cf3Done = new Phaser(2);
cf1 =
supplyAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
return 1;
});
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.applyToEither(
cf2,
(x) -> {
check(x == 2);
return x;
});
checkCompletedNormally(cf3, 2);
checkCompletedNormally(cf2, 2);
check(!cf1.isDone());
cf3Done.arrive();
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf3, 2);
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
return 2;
});
cf3 =
cf1.applyToEitherAsync(
cf2,
(x) -> {
check(x == 1);
return x;
});
checkCompletedNormally(cf3, 1);
checkCompletedNormally(cf1, 1);
check(!cf2.isDone());
cf3Done.arrive();
checkCompletedNormally(cf2, 2);
checkCompletedNormally(cf3, 1);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// acceptEitherXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
cf3 =
cf1.acceptEither(
cf2,
(x) -> {
check(x == 1 || x == 2);
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.acceptEitherAsync(
cf2,
(x) -> {
check(x == 1 || x == 2);
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = supplyAsync(() -> 1);
cf2 = supplyAsync(() -> 2);
cf3 =
cf2.acceptEitherAsync(
cf1,
(x) -> {
check(x == 1 || x == 2);
atomicInt.incrementAndGet();
},
executor);
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 = supplyAsync(() -> 2);
cf3 =
cf2.acceptEitherAsync(
cf1,
(x) -> {
check(x == 2);
},
executor);
try {
check(cf3.join() == null);
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf2.acceptEitherAsync(
cf1,
(x) -> {
check(x == 1);
});
try {
check(cf3.join() == null);
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf2.acceptEitherAsync(
cf1,
(x) -> {
fail();
});
checkCompletedExceptionally(cf3);
check(cf1.isDone() || cf2.isDone());
final Phaser cf3Done = new Phaser(2);
cf1 =
supplyAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
return 1;
});
cf2 = supplyAsync(() -> 2);
cf3 =
cf1.acceptEither(
cf2,
(x) -> {
check(x == 2);
});
checkCompletedNormally(cf3, null);
checkCompletedNormally(cf2, 2);
check(!cf1.isDone());
cf3Done.arrive();
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf3, null);
cf1 = supplyAsync(() -> 1);
cf2 =
supplyAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
return 2;
});
cf3 =
cf1.acceptEitherAsync(
cf2,
(x) -> {
check(x == 1);
});
checkCompletedNormally(cf3, null);
checkCompletedNormally(cf1, 1);
check(!cf2.isDone());
cf3Done.arrive();
checkCompletedNormally(cf2, 2);
checkCompletedNormally(cf3, null);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// runAfterEitherXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Void> cf3;
int before = atomicInt.get();
CompletableFuture<Void> cf1 = runAsync(() -> {});
CompletableFuture<Void> cf2 = runAsync(() -> {});
cf3 =
cf1.runAfterEither(
cf2,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> {});
cf2 = runAsync(() -> {});
cf3 =
cf1.runAfterEitherAsync(
cf2,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 = runAsync(() -> {});
cf2 = runAsync(() -> {});
cf3 =
cf2.runAfterEitherAsync(
cf1,
() -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedNormally(cf3, null);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == (before + 1));
before = atomicInt.get();
cf1 =
runAsync(
() -> {
throw new RuntimeException();
});
cf2 = runAsync(() -> {});
cf3 =
cf2.runAfterEither(
cf1,
() -> {
atomicInt.incrementAndGet();
});
try {
check(cf3.join() == null);
check(atomicInt.get() == (before + 1));
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
before = atomicInt.get();
cf1 = runAsync(() -> {});
cf2 =
runAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf1.runAfterEitherAsync(
cf2,
() -> {
atomicInt.incrementAndGet();
});
try {
check(cf3.join() == null);
check(atomicInt.get() == (before + 1));
} catch (CompletionException x) {
pass();
}
check(cf3.isDone());
check(cf1.isDone() || cf2.isDone());
before = atomicInt.get();
cf1 =
runAsync(
() -> {
throw new RuntimeException();
});
cf2 =
runAsync(
() -> {
throw new RuntimeException();
});
cf3 =
cf2.runAfterEitherAsync(
cf1,
() -> {
atomicInt.incrementAndGet();
},
executor);
checkCompletedExceptionally(cf3);
check(cf1.isDone() || cf2.isDone());
check(atomicInt.get() == before);
final Phaser cf3Done = new Phaser(2);
before = atomicInt.get();
cf1 =
runAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
});
cf2 = runAsync(() -> {});
cf3 =
cf1.runAfterEither(
cf2,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
checkCompletedNormally(cf2, null);
check(!cf1.isDone());
check(atomicInt.get() == (before + 1));
cf3Done.arrive();
checkCompletedNormally(cf1, null);
checkCompletedNormally(cf3, null);
before = atomicInt.get();
cf1 = runAsync(() -> {});
cf2 =
runAsync(
() -> {
cf3Done.arriveAndAwaitAdvance();
});
cf3 =
cf1.runAfterEitherAsync(
cf2,
() -> {
atomicInt.incrementAndGet();
});
checkCompletedNormally(cf3, null);
checkCompletedNormally(cf1, null);
check(!cf2.isDone());
check(atomicInt.get() == (before + 1));
cf3Done.arrive();
checkCompletedNormally(cf2, null);
checkCompletedNormally(cf3, null);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// thenComposeXXX tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 =
cf1.thenCompose(
(x) -> {
check(x == 1);
return CompletableFuture.completedFuture(2);
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
cf1 = supplyAsync(() -> 1);
cf2 =
cf1.thenComposeAsync(
(x) -> {
check(x == 1);
return CompletableFuture.completedFuture(2);
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
cf1 = supplyAsync(() -> 1);
cf2 =
cf1.thenComposeAsync(
(x) -> {
check(x == 1);
return CompletableFuture.completedFuture(2);
},
executor);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
int before = atomicInt.get();
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenCompose(
(x) -> {
atomicInt.incrementAndGet();
return CompletableFuture.completedFuture(2);
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 =
supplyAsync(
() -> {
throw new RuntimeException();
});
cf2 =
cf1.thenComposeAsync(
(x) -> {
atomicInt.incrementAndGet();
return CompletableFuture.completedFuture(2);
});
checkCompletedExceptionally(cf1);
checkCompletedExceptionally(cf2);
check(atomicInt.get() == before);
cf1 = supplyAsync(() -> 1);
cf2 =
cf1.thenComposeAsync(
(x) -> {
throw new RuntimeException();
},
executor);
checkCompletedNormally(cf1, 1);
checkCompletedExceptionally(cf2);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// anyOf tests
// ----------------------------------------------------------------
try {
CompletableFuture<Object> cf3;
for (int k = 0; k < 10; k++) {
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
CompletableFuture<Integer> cf2 = supplyAsync(() -> 2);
cf3 = CompletableFuture.anyOf(cf1, cf2);
checkCompletedNormally(cf3, new Object[] {1, 2});
check(cf1.isDone() || cf2.isDone());
}
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// allOf tests
// ----------------------------------------------------------------
try {
CompletableFuture<?> cf3;
for (int k = 0; k < 10; k++) {
CompletableFuture<Integer>[] cfs =
(CompletableFuture<Integer>[]) Array.newInstance(CompletableFuture.class, 10);
for (int j = 0; j < 10; j++) {
final int v = j;
cfs[j] = supplyAsync(() -> v);
}
cf3 = CompletableFuture.allOf(cfs);
for (int j = 0; j < 10; j++) checkCompletedNormally(cfs[j], j);
checkCompletedNormally(cf3, null);
}
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// exceptionally tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 =
cf1.exceptionally(
(t) -> {
fail("function should never be called");
return 2;
});
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 1);
final RuntimeException t = new RuntimeException();
cf1 =
supplyAsync(
() -> {
throw t;
});
cf2 =
cf1.exceptionally(
(x) -> {
check(x.getCause() == t);
return 2;
});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 2);
} catch (Throwable t) {
unexpected(t);
}
// ----------------------------------------------------------------
// handle tests
// ----------------------------------------------------------------
try {
CompletableFuture<Integer> cf2;
CompletableFuture<Integer> cf1 = supplyAsync(() -> 1);
cf2 = cf1.handle((x, t) -> x + 1);
checkCompletedNormally(cf1, 1);
checkCompletedNormally(cf2, 2);
final RuntimeException ex = new RuntimeException();
cf1 =
supplyAsync(
() -> {
throw ex;
});
cf2 =
cf1.handle(
(x, t) -> {
check(t.getCause() == ex);
return 2;
});
checkCompletedExceptionally(cf1);
checkCompletedNormally(cf2, 2);
} catch (Throwable t) {
unexpected(t);
}
}
/**
* Returns videos by user. Shows example of the composing two subsequent asynchronous operations:
* at first, the user is retrieved, then his videos are retrieved.
*
* @param userFuture Completable future of the user.
* @return User future.
*/
public CompletableFuture<List<Video>> getByOwner(CompletableFuture<User> userFuture) {
return userFuture.thenCompose(this::getByOwner);
}