Examples of co.paralleluniverse.fibers.Fiber

co.paralleluniverse.fibers.Fiber
A lightweight thread.
There are two ways to create a new fiber: either subclass the {@code Fiber} class and override the {@code run} method,or pass the code to be executed in the fiber as the {@code target} parameter to the constructor. All in all, the Fiber APIresembles the {@link Thread} class in many ways.
A fiber runs inside a ForkJoinPool.
A Fiber can be serialized if it's not running and all involved classes and data types are also {@link Serializable}.
A new Fiber occupies under 400 bytes of memory (when using the default stack size, and compressed OOPs are turned on, as they are by default). @param < V> The type of the fiber's result value. Should be set to {@link Void} if no value is to be returned by the fiber. @author pron


    @Test
    public void testFlatmapSendThreadToFiber() throws Exception {
        final Channel<Integer> ch = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                assertThat(ch.receive(), is(1));
                assertThat(ch.receive(), is(20));
                assertThat(ch.receive(), is(200));
                assertThat(ch.receive(), is(2000));
                assertThat(ch.receive(), is(40));
                assertThat(ch.receive(), is(400));
                assertThat(ch.receive(), is(4000));
                assertThat(ch.receive(), is(5));
                assertThat(ch.receive(), is(nullValue()));
                assertThat(ch.isClosed(), is(true));
            }
        }).start();


        SendPort<Integer> ch1 = Channels.flatMapSend(Channels.<Integer>newChannel(1), ch, new Function<Integer, ReceivePort<Integer>>() {
            @Override
            public ReceivePort<Integer> apply(Integer x) {
                if (x == 3)
                    return null;
                if (x % 2 == 0)
                    return Channels.toReceivePort(Arrays.asList(new Integer[]{x * 10, x * 100, x * 1000}));
                else
                    return Channels.singletonReceivePort(x);
            }
        });
        Strand.sleep(50);
        ch1.send(1);
        ch1.send(2);
        ch1.send(3);
        ch1.send(4);
        ch1.send(5);
        ch1.close();
        fib.join();
    }

View Full Code Here


    //@Test
    public void testFlatmapSendWithTimeoutsThreadToFiber() throws Exception {
        final Channel<Integer> ch = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                assertThat(ch.receive(), is(1));
                assertThat(ch.receive(30, TimeUnit.MILLISECONDS), is(nullValue()));
                assertThat(ch.receive(40, TimeUnit.MILLISECONDS), is(20));
                assertThat(ch.receive(), is(200));
                assertThat(ch.receive(), is(2000));
                assertThat(ch.receive(), is(40));
                assertThat(ch.receive(), is(400));
                assertThat(ch.receive(), is(4000));
                assertThat(ch.receive(30, TimeUnit.MILLISECONDS), is(nullValue()));
                assertThat(ch.receive(40, TimeUnit.MILLISECONDS), is(5));
                assertThat(ch.receive(), is(nullValue()));
                assertThat(ch.isClosed(), is(true));
            }
        }).start();


        SendPort<Integer> ch1 = Channels.flatMapSend(Channels.<Integer>newChannel(1), ch, new Function<Integer, ReceivePort<Integer>>() {
            @Override
            public ReceivePort<Integer> apply(Integer x) {
                if (x == 3)
                    return null;
                if (x % 2 == 0)
                    return Channels.toReceivePort(Arrays.asList(new Integer[]{x * 10, x * 100, x * 1000}));
                else
                    return Channels.singletonReceivePort(x);
            }
        });


        Strand.sleep(50);
        ch1.send(1);
        Strand.sleep(50);
        ch1.send(2);
        ch1.send(3);
        ch1.send(4);
        Strand.sleep(50);
        ch1.send(5);
        ch1.close();
        fib.join();
    }

View Full Code Here

    public void testSelectReceive1() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SelectAction<String> sa1 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));


                String m1 = sa1.message();


                SelectAction<String> sa2 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));
                String m2 = sa2.message();


                assertThat(sa1.index(), is(0));
                assertThat(m1, equalTo("hello"));
                assertThat(sa2.index(), is(2));
                assertThat(m2, equalTo("world!"));
            }
        }).start();


        Thread.sleep(200);


        channel1.send("hello");
        Thread.sleep(200);


        channel3.send("world!");


        fib.join();
    }

View Full Code Here

    public void testSelectReceive2() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Strand.sleep(200);
                SelectAction<String> sa1 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));




                Strand.sleep(200);
                SelectAction<String> sa2 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));


                if (sa2.index() < sa1.index()) {
                    SelectAction<String> tmp = sa1;
                    sa1 = sa2;
                    sa2 = tmp;
                }


                String m1 = sa1.message();
                String m2 = sa2.message();


                assertThat(sa1.index(), is(0));
                assertThat(m1, equalTo("hello"));
                assertThat(sa2.index(), is(2));
                assertThat(m2, equalTo("world!"));
            }
        }).start();


        channel1.send("hello");
        channel3.send("world!");


        fib.join();
    }

View Full Code Here

    public void testSelectReceiveWithClose1() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SelectAction<String> sa1 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));


                String m1 = sa1.message();


                SelectAction<String> sa2 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));
                String m2 = sa2.message();


                assertThat(sa1.index(), is(2));
                assertThat(m1, nullValue());
                assertThat(m2, nullValue());
            }
        }).start();


        Thread.sleep(200);
        channel3.close();


        fib.join();
    }

View Full Code Here

    public void testSelectReceiveWithClose2() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Strand.sleep(200);
                SelectAction<String> sa1 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));


                String m1 = sa1.message();


                Strand.sleep(200);
                SelectAction<String> sa2 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));
                String m2 = sa2.message();


                assertThat(sa1.index(), is(2));
                assertThat(m1, nullValue());
                assertThat(m2, nullValue());
            }
        }).start();


        channel3.close();


        fib.join();
    }

View Full Code Here

    public void testSelectReceiveTimeout() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SelectAction<String> sa1 = select(1, TimeUnit.MILLISECONDS,
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));


                SelectAction<String> sa2 = select(300, TimeUnit.MILLISECONDS,
                        receive(channel1),
                        receive(channel2),
                        receive(channel3));
                String m2 = sa2.message();


                assertThat(sa1, is(nullValue()));
                assertThat(sa2.index(), is(0));
                assertThat(m2, equalTo("hello"));
            }
        }).start();


        Thread.sleep(200);


        channel1.send("hello");


        fib.join();
    }

View Full Code Here

    public void testSelectReceiveWithTimeoutChannel() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SelectAction<String> sa1 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3),
                        receive(TimeoutChannel.<String>timeout(1, TimeUnit.MILLISECONDS)));


                SelectAction<String> sa2 = select(
                        receive(channel1),
                        receive(channel2),
                        receive(channel3),
                        receive(TimeoutChannel.<String>timeout(300, TimeUnit.MILLISECONDS)));
                String m2 = sa2.message();


                assertThat(sa1.index(), is(3));
                assertThat(sa2.index(), is(0));
                assertThat(m2, equalTo("hello"));
            }
        }).start();


        Thread.sleep(200);


        channel1.send("hello");


        fib.join();
    }

View Full Code Here

    public void testSelectSend1() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SelectAction<String> sa1 = select(
                        send(channel1, "hi1"),
                        send(channel2, "hi2"),
                        send(channel3, "hi3"));


                SelectAction<String> sa2 = select(
                        send(channel1, "hi1"),
                        send(channel2, "hi2"),
                        send(channel3, "hi3"));


                assertThat(sa1.index(), is(1));
                assertThat(sa2.index(), is(0));
            }
        }).start();


        Thread.sleep(200);


        String m1 = channel2.receive();
        assertThat(m1, equalTo("hi2"));


        Thread.sleep(200);
        String m2 = channel1.receive();
        assertThat(m2, equalTo("hi1"));


        fib.join();
    }

View Full Code Here

    public void testSelectSend2() throws Exception {
        final Channel<String> channel1 = newChannel();
        final Channel<String> channel2 = newChannel();
        final Channel<String> channel3 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Strand.sleep(200);
                SelectAction<String> sa1 = select(
                        send(channel1, "hi1"),
                        send(channel2, "hi2"),
                        send(channel3, "hi3"));


                Strand.sleep(200);
                SelectAction<String> sa2 = select(
                        send(channel1, "hi1"),
                        send(channel2, "hi2"),
                        send(channel3, "hi3"));


                assertThat(sa1.index(), is(1));
                assertThat(sa2.index(), is(0));
            }
        }).start();


        String m1 = channel2.receive();
        assertThat(m1, equalTo("hi2"));


        String m2 = channel1.receive();
        assertThat(m2, equalTo("hi1"));


        fib.join();
    }

View Full Code Here

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co.paralleluniverse.actors.Actor

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co.paralleluniverse.actors.behaviors.EventSourceTest

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