Examples with Deferred org.osgi.util.promise.Deferred used on opensource projects

Example 16 with Deferred

use of org.osgi.util.promise.Deferred in project aries by apache.

the class PromisesTest method testLatch.

// T = String
private void testLatch(boolean preResolve, String... rv) throws Exception {
    @SuppressWarnings("unchecked") Deferred<String>[] dv = new Deferred[rv.length];
    @SuppressWarnings("unchecked") Promise<String>[] pv = new Promise[rv.length];
    for (int i = 0; i < rv.length; i++) {
        dv[i] = new Deferred<String>();
        pv[i] = dv[i].getPromise();
    }
    Promise<List<String>> latch = null;
    if (!preResolve) {
        Promise<List<String>> latch2 = Promises.all(pv);
        latch = latch2;
        if (rv.length == 0) {
            assertTrue("latch resolved", latch.isDone());
            return;
        }
        assertFalse("latch not resolved", latch.isDone());
    }
    int nFail = 0;
    for (int i = 0; i < rv.length; i++) {
        String res = rv[i];
        if (res.startsWith("!")) {
            dv[i].fail(new Exception(res));
            nFail++;
        } else {
            dv[i].resolve(res);
        }
    }
    if (preResolve) {
        Promise<List<String>> latch2 = Promises.all(pv);
        latch = latch2;
    }
    assertTrue("latch resolved", latch.isDone());
    if (nFail > 0) {
        @SuppressWarnings({ "not thrown", "all" }) Throwable failure = latch.getFailure();
        assertTrue("failure instanceof FailedPromisesException", failure instanceof FailedPromisesException);
        Collection<Promise<?>> failedPromises = ((FailedPromisesException) failure).getFailedPromises();
        assertEquals("failedPromises size matches", nFail, failedPromises.size());
        for (int i = 0; i < rv.length; i++) {
            Promise<String> promise = pv[i];
            if (rv[i].startsWith("!")) {
                assertTrue("failedPromises contains", failedPromises.contains(promise));
            } else {
                assertFalse("failedPromises doesn't contain", failedPromises.contains(promise));
            }
        }
    } else {
        List<String> list = latch.getValue();
        assertEquals("list size matches", rv.length, list.size());
        for (int i = 0; i < rv.length; i++) {
            assertEquals("list[i] matches", rv[i], list.get(i));
        }
        // check list is modifiable
        list.add(0, "new item");
        assertEquals("list modifiable", "new item", list.get(0));
    }
}

Example 17 with Deferred

use of org.osgi.util.promise.Deferred in project aries by apache.

the class PromisesTest method testLatch.

// T = Number
// S = Integer
private void testLatch(Integer... rv) throws Exception {
    @SuppressWarnings("unchecked") Deferred<Integer>[] dv = new Deferred[rv.length];
    List<Promise<Integer>> promises = new ArrayList<Promise<Integer>>();
    for (int i = 0; i < rv.length; i++) {
        dv[i] = new Deferred<Integer>();
        promises.add(dv[i].getPromise());
    }
    Promise<List<Number>> latch = Promises.all(promises);
    if (rv.length == 0) {
        assertTrue("latch resolved", latch.isDone());
        return;
    }
    assertFalse("latch not resolved", latch.isDone());
    int nFail = 0;
    for (int i = 0; i < rv.length; i++) {
        Integer res = rv[i];
        if (res < 0) {
            dv[i].fail(new Exception("fail" + res));
            nFail++;
        } else {
            dv[i].resolve(res);
        }
    }
    assertTrue("latch resolved", latch.isDone());
    if (nFail > 0) {
        @SuppressWarnings({ "not thrown", "all" }) Throwable failure = latch.getFailure();
        assertTrue("failure instanceof FailedPromisesException", failure instanceof FailedPromisesException);
        Collection<Promise<?>> failedPromises = ((FailedPromisesException) failure).getFailedPromises();
        assertEquals("failedPromises size matches", nFail, failedPromises.size());
        for (int i = 0; i < rv.length; i++) {
            Promise<Integer> promise = promises.get(i);
            if (rv[i] < 0) {
                assertTrue("failedPromises contains", failedPromises.contains(promise));
            } else {
                assertFalse("failedPromises doesn't contain", failedPromises.contains(promise));
            }
        }
    } else {
        List<Number> list = latch.getValue();
        assertEquals("list size matches", rv.length, list.size());
        for (int i = 0; i < rv.length; i++) {
            assertEquals("list[i] matches", rv[i], list.get(i));
        }
        // check list is modifiable
        list.add(0, 3.14);
        assertEquals("list modifiable", 3.14, list.get(0));
    }
}

Example 18 with Deferred

use of org.osgi.util.promise.Deferred in project aries by apache.

the class AbstractPushStreamImpl method count.

@Override
public Promise<Long> count() {
    Deferred<Long> d = new Deferred<>();
    LongAdder counter = new LongAdder();
    updateNext((event) -> {
        try {
            switch(event.getType()) {
                case DATA:
                    counter.add(1);
                    return CONTINUE;
                case CLOSE:
                    d.resolve(Long.valueOf(counter.sum()));
                    break;
                case ERROR:
                    d.fail(event.getFailure());
                    break;
            }
            close(event.nodata());
            return ABORT;
        } catch (Exception e) {
            close(PushEvent.error(e));
            return ABORT;
        }
    });
    begin();
    return d.getPromise();
}

Example 19 with Deferred

use of org.osgi.util.promise.Deferred in project aries by apache.

the class AbstractPushStreamImpl method forEachEvent.

@Override
public Promise<Long> forEachEvent(PushEventConsumer<? super T> action) {
    Deferred<Long> d = new Deferred<>();
    LongAdder la = new LongAdder();
    updateNext((event) -> {
        try {
            switch(event.getType()) {
                case DATA:
                    long value = action.accept(event);
                    la.add(value);
                    return value;
                case CLOSE:
                    try {
                        action.accept(event);
                    } finally {
                        d.resolve(Long.valueOf(la.sum()));
                    }
                    break;
                case ERROR:
                    try {
                        action.accept(event);
                    } finally {
                        d.fail(event.getFailure());
                    }
                    break;
            }
            return ABORT;
        } catch (Exception e) {
            close(PushEvent.error(e));
            return ABORT;
        }
    });
    begin();
    return d.getPromise();
}