Package co.paralleluniverse.strands

Examples of co.paralleluniverse.strands.Condition

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    @Override
    public Object register(SelectAction<V> action) {
        if (action.isData())
            throw new UnsupportedOperationException("Send is not supported by DelayedValChanel");
        Condition sync = dv.getSync();
        if (sync == null) {
            if (!action.lease())
                return null;
            action.setItem(dv.getValue());
            action.won();
            return null;
        }
        sync.register();
        return action;
    }
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    @Override
    public void unregister(Object token) {
        if (token == null)
            return;
        Condition sync = dv.getSync();
        if (sync != null)
            sync.unregister();
    }
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        fiber.join();
    }

    @Test
    public void testDumpStackWaitingFiber() throws Exception {
        final Condition cond = new SimpleConditionSynchronizer(null);
        final AtomicBoolean flag = new AtomicBoolean(false);

        Fiber fiber = new Fiber(scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                foo();
            }

            private void foo() throws InterruptedException, SuspendExecution {
                Object token = cond.register();
                try {
                    for (int i = 0; !flag.get(); i++)
                        cond.await(i);
                } finally {
                    cond.unregister(token);
                }
            }
        }).start();

        Thread.sleep(200);

        StackTraceElement[] st = fiber.getStackTrace();

        // Strand.printStackTrace(st, System.err);
        assertThat(st[0].getMethodName(), equalTo("park"));
        boolean found = false;
        for (StackTraceElement ste : st) {
            if (ste.getMethodName().equals("foo")) {
                found = true;
                break;
            }
        }
        assertThat(found, is(true));
        assertThat(st[st.length - 1].getMethodName(), equalTo("run"));
        assertThat(st[st.length - 1].getClassName(), equalTo(Fiber.class.getName()));

        flag.set(true);
        cond.signalAll();

        fiber.join();
    }
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        fiber.join();
    }

    @Test
    public void testDumpStackWaitingFiberWhenCalledFromFiber() throws Exception {
        final Condition cond = new SimpleConditionSynchronizer(null);
        final AtomicBoolean flag = new AtomicBoolean(false);

        final Fiber fiber = new Fiber(scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                foo();
            }

            private void foo() throws InterruptedException, SuspendExecution {
                Object token = cond.register();
                try {
                    for (int i = 0; !flag.get(); i++)
                        cond.await(i);
                } finally {
                    cond.unregister(token);
                }
            }
        }).start();

        Thread.sleep(200);

        Fiber fiber2 = new Fiber(scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                StackTraceElement[] st = fiber.getStackTrace();

                // Strand.printStackTrace(st, System.err);
                assertThat(st[0].getMethodName(), equalTo("park"));
                boolean found = false;
                for (StackTraceElement ste : st) {
                    if (ste.getMethodName().equals("foo")) {
                        found = true;
                        break;
                    }
                }
                assertThat(found, is(true));
                assertThat(st[st.length - 1].getMethodName(), equalTo("run"));
                assertThat(st[st.length - 1].getClassName(), equalTo(Fiber.class.getName()));
            }
        }).start();

        fiber2.join();

        flag.set(true);
        cond.signalAll();

        fiber.join();
    }
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    @Override
    public Object register(SelectAction<V> action1) {
        SelectActionImpl<V> action = (SelectActionImpl<V>)action1;
        if (action.isData())
            throw new UnsupportedOperationException("Send is not supported by DelayedValChanel");
        Condition sync = dv.getSync();
        if (sync == null) {
            if (!action.lease())
                return null;
            action.setItem(dv.getValue());
            action.won();
            return null;
        }
        sync.register();
        return action;
    }
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    @Override
    public void unregister(Object token) {
        if (token == null)
            return;
        Condition sync = dv.getSync();
        if (sync != null)
            sync.unregister(null);
    }
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        return consumer.hasNext();
    }
   
    void attemptReceive() throws EOFException, SuspendExecution, InterruptedException {
        checkClosed();
        final Condition sync = channel.sync;
        Object token = sync.register();
        try {
            for (int i = 0; !consumer.hasNext(); i++) {
                if (channel.isSendClosed()) {
                    setReceiveClosed();
                    checkClosed();
                }
                sync.await(i);
            }
            consumer.poll0();
        } finally {
            sync.unregister(token);
        }
    }
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        }
    }

    void attemptReceive(long timeout, TimeUnit unit) throws SuspendExecution, InterruptedException, TimeoutException, EOFException {
        checkClosed();
        final Condition sync = channel.sync;
        long left = unit.toNanos(timeout);
        final long deadline = System.nanoTime() + left;
        Object token = sync.register();
        try {
            for (int i = 0; !consumer.hasNext(); i++) {
                if (channel.isSendClosed()) {
                    setReceiveClosed();
                    checkClosed();
                }
                sync.await(i, left, TimeUnit.NANOSECONDS);
                left = deadline - System.nanoTime();
                if (left <= 0)
                    throw new TimeoutException();
            }
            consumer.poll0();
        } finally {
            sync.unregister(token);
        }
    }
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    }

    void attemptReceive() throws EOFException, SuspendExecution, InterruptedException {
        if (isClosed())
            throw new EOFException();
        final Condition sync = channel.sync;
        Object token = sync.register();
        try {
            for (int i = 0; !consumer.hasNext(); i++) {
                if (channel.isSendClosed()) {
                    setReceiveClosed();
                    throw new EOFException();
                }
                sync.await(i);
            }
            consumer.poll0();
        } finally {
            sync.unregister(token);
        }
    }
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    }

    void attemptReceive(long timeout, TimeUnit unit) throws SuspendExecution, InterruptedException, TimeoutException, EOFException {
        if (isClosed())
            throw new EOFException();
        final Condition sync = channel.sync;
        long left = unit.toNanos(timeout);
        final long deadline = System.nanoTime() + left;
        Object token = sync.register();
        try {
            for (int i = 0; !consumer.hasNext(); i++) {
                if (channel.isSendClosed()) {
                    setReceiveClosed();
                    throw new EOFException();
                }
                sync.await(i, left, TimeUnit.NANOSECONDS);
                left = deadline - System.nanoTime();
                if (left <= 0)
                    throw new TimeoutException();
            }
            consumer.poll0();
        } finally {
            sync.unregister(token);
        }
    }
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Related Classes of co.paralleluniverse.strands.Condition

  • co.paralleluniverse.fibers.FiberTest
  • co.paralleluniverse.strands.channels.DelayedValChannel
  • co.paralleluniverse.strands.channels.TickerChannelConsumer
  • co.paralleluniverse.strands.dataflow.ValChannel
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