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

Example 16 with Promise

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

the class AsyncServiceTest method test.

@Test
public void test() throws InterruptedException {
    DelayedEcho raw = new DelayedEcho();
    AsyncService service = new AsyncService(null, es, ses, serviceTracker);
    DelayedEcho mediated = service.mediate(raw, DelayedEcho.class);
    Promise<String> promise = service.call(mediated.echo("Hello World", 1000));
    final CountDownLatch latch = new CountDownLatch(1);
    promise.filter(new Predicate<String>() {

        @Override
        public boolean test(String t) {
            return "Hello World".equals(t);
        }
    }).then(new Success<String, Void>() {

        @Override
        public Promise<Void> call(Promise<String> resolved) throws Exception {
            latch.countDown();
            return null;
        }
    });
    assertTrue(latch.await(5, TimeUnit.SECONDS));
}

Example 17 with Promise

use of org.osgi.util.promise.Promise 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 18 with Promise

use of org.osgi.util.promise.Promise 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 19 with Promise

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

the class PromiseImpl method resolveWith.

public Promise<Void> resolveWith(final Promise<? extends T> with) {
    if (with == null)
        throw new NullPointerException();
    final PromiseImpl<Void> result = new PromiseImpl<Void>(exec, ses);
    with.then(new Success<T, T>() {

        @Override
        public Promise<T> call(Promise<T> resolved) throws Exception {
            if (isDone()) {
                result.fail(new IllegalStateException("associated Promise already resolved"));
            }
            PromiseImpl.this.resolve(resolved.getValue());
            result.resolve(null);
            return null;
        }
    }, new Failure() {

        @Override
        public void fail(Promise<?> resolved) throws Exception {
            if (isDone()) {
                result.fail(new IllegalStateException("associated Promise already resolved"));
            }
            PromiseImpl.this.fail(resolved.getFailure());
            result.resolve(null);
        }
    });
    return result;
}

Example 20 with Promise

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

the class PromiseImpl method recover.

@Override
public Promise<T> recover(final Function<Promise<?>, ? extends T> recovery) {
    if (recovery == null)
        throw new NullPointerException();
    final PromiseImpl<T> result = new PromiseImpl<T>(exec, ses);
    then(new Success<T, T>() {

        @Override
        public Promise<T> call(Promise<T> resolved) throws Exception {
            result.resolve(resolved.getValue());
            return null;
        }
    }, new Failure() {

        @Override
        public void fail(Promise<?> resolved) throws Exception {
            try {
                T recover = recovery.apply(resolved);
                if (recover != null) {
                    result.resolve(recover);
                } else {
                    result.fail(resolved.getFailure());
                }
            } catch (Throwable t) {
                result.fail(t);
            }
        }
    });
    return result;
}