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 testFilterThreadToFiber() throws Exception {
        final Channel<Integer> ch = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                ReceivePort<Integer> ch1 = Channels.filter((ReceivePort<Integer>) ch, new Predicate<Integer>() {
                    @Override
                    public boolean apply(Integer input) {
                        return input % 2 == 0;
                    }
                });


                Integer m1 = ch1.receive();
                Integer m2 = ch1.receive();
                Integer m3 = ch1.receive();


                assertThat(m1, equalTo(2));
                assertThat(m2, equalTo(4));
                assertThat(m3, is(nullValue()));
            }
        }).start();


        Strand.sleep(50);
        ch.send(1);
        ch.send(2);
        Strand.sleep(50);
        ch.send(3);
        ch.send(4);
        ch.send(5);
        ch.close();


        fib.join();
    }

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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Fiber.sleep(100);


                Strand.sleep(50);
                ch.send(1);
                ch.send(2);
                Strand.sleep(50);
                ch.send(3);
                ch.send(4);
                ch.send(5);
                ch.close();
            }
        }).start();


        ReceivePort<Integer> ch1 = Channels.filter((ReceivePort<Integer>) ch, new Predicate<Integer>() {
            @Override
            public boolean apply(Integer input) {
                return input % 2 == 0;
            }
        });


        Integer m1 = ch1.receive();
        Integer m2 = ch1.receive();
        Integer m3 = ch1.receive();


        assertThat(m1, equalTo(2));
        assertThat(m2, equalTo(4));
        assertThat(m3, is(nullValue()));


        fib.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                ReceivePort<Integer> ch1 = Channels.filter((ReceivePort<Integer>) ch, new Predicate<Integer>() {
                    @Override
                    public boolean apply(Integer input) {
                        return input % 2 == 0;
                    }
                });


                Integer m1 = ch1.receive();
                Integer m0 = ch1.receive(30, TimeUnit.MILLISECONDS);
                Integer m2 = ch1.receive(50, TimeUnit.MILLISECONDS);
                Integer m3 = ch1.receive();


                assertThat(m1, equalTo(2));
                assertThat(m0, is(nullValue()));
                assertThat(m2, equalTo(4));
                assertThat(m3, is(nullValue()));
            }
        }).start();


        Strand.sleep(50);
        ch.send(1);
        ch.send(2);
        Strand.sleep(50);
        ch.send(3);
        ch.send(4);
        ch.send(5);
        ch.close();


        fib.join();
    }

View Full Code Here


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


        Fiber fib1 = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Integer m1 = ch.receive();
                Integer m2 = ch.receive();
                Integer m3 = ch.receive();


                assertThat(m1, equalTo(2));
                assertThat(m2, equalTo(4));
                assertThat(m3, is(nullValue()));
            }
        }).start();


        Fiber fib2 = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                SendPort<Integer> ch1 = Channels.filterSend((SendPort<Integer>) ch, new Predicate<Integer>() {
                    @Override
                    public boolean apply(Integer input) {
                        return input % 2 == 0;
                    }
                });


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


        fib1.join();
        fib2.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Integer m1 = ch.receive();
                Integer m2 = ch.receive();
                Integer m3 = ch.receive();


                assertThat(m1, equalTo(2));
                assertThat(m2, equalTo(4));
                assertThat(m3, is(nullValue()));
            }
        }).start();


        SendPort<Integer> ch1 = Channels.filterSend((SendPort<Integer>) ch, new Predicate<Integer>() {
            @Override
            public boolean apply(Integer input) {
                return input % 2 == 0;
            }
        });


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


        fib.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Fiber.sleep(100);


                SendPort<Integer> ch1 = Channels.filterSend((SendPort<Integer>) ch, new Predicate<Integer>() {
                    @Override
                    public boolean apply(Integer input) {
                        return input % 2 == 0;
                    }
                });


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


        Integer m1 = ch.receive();
        Integer m2 = ch.receive();
        Integer m3 = ch.receive();


        assertThat(m1, equalTo(2));
        assertThat(m2, equalTo(4));
        assertThat(m3, is(nullValue()));


        fib.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Integer m1 = ch.receive();
                Integer m0 = ch.receive(30, TimeUnit.MILLISECONDS);
                Integer m2 = ch.receive(80, TimeUnit.MILLISECONDS);
                Integer m3 = ch.receive();


                assertThat(m1, equalTo(2));
                assertThat(m0, is(nullValue()));
                assertThat(m2, equalTo(4));
                assertThat(m3, is(nullValue()));
            }
        }).start();


        SendPort<Integer> ch1 = Channels.filterSend((SendPort<Integer>) ch, new Predicate<Integer>() {
            @Override
            public boolean apply(Integer input) {
                return input % 2 == 0;
            }
        });


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


        fib.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                ReceivePort<Integer> ch1 = Channels.map((ReceivePort<Integer>) ch, new Function<Integer, Integer>() {
                    @Override
                    public Integer apply(Integer input) {
                        return input + 10;
                    }
                });


                Integer m1 = ch1.receive();
                Integer m2 = ch1.receive();
                Integer m3 = ch1.receive();
                Integer m4 = ch1.receive();
                Integer m5 = ch1.receive();
                Integer m6 = ch1.receive();


                assertThat(m1, equalTo(11));
                assertThat(m2, equalTo(12));
                assertThat(m3, equalTo(13));
                assertThat(m4, equalTo(14));
                assertThat(m5, equalTo(15));
                assertThat(m6, is(nullValue()));
            }
        }).start();


        Strand.sleep(50);
        ch.send(1);
        ch.send(2);
        Strand.sleep(50);
        ch.send(3);
        ch.send(4);
        ch.send(5);
        ch.close();


        fib.join();
    }

View Full Code Here


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


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                Integer m1 = ch.receive();
                Integer m2 = ch.receive();
                Integer m3 = ch.receive();
                Integer m4 = ch.receive();
                Integer m5 = ch.receive();
                Integer m6 = ch.receive();


                assertThat(m1, equalTo(11));
                assertThat(m2, equalTo(12));
                assertThat(m3, equalTo(13));
                assertThat(m4, equalTo(14));
                assertThat(m5, equalTo(15));
                assertThat(m6, is(nullValue()));
            }
        }).start();


        SendPort<Integer> ch1 = Channels.mapSend((SendPort<Integer>) ch, new Function<Integer, Integer>() {
            @Override
            public Integer apply(Integer input) {
                return input + 10;
            }
        });


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


        fib.join();
    }

View Full Code Here

    @Test
    public void testZipThreadToFiber() throws Exception {
        final Channel<String> ch1 = newChannel();
        final Channel<Integer> ch2 = newChannel();


        Fiber fib = new Fiber("fiber", scheduler, new SuspendableRunnable() {
            @Override
            public void run() throws SuspendExecution, InterruptedException {
                ReceivePort<String> ch = Channels.zip(ch1, ch2, new Function2<String, Integer, String>() {
                    @Override
                    public String apply(String x1, Integer x2) {
                        return x1 + x2;
                    }
                });


                String m1 = ch.receive();
                String m2 = ch.receive();
                String m3 = ch.receive();
                String m4 = ch.receive();


                assertThat(m1, equalTo("a1"));
                assertThat(m2, equalTo("b2"));
                assertThat(m3, equalTo("c3"));
                assertThat(m4, is(nullValue()));
            }
        }).start();


        Strand.sleep(50);
        ch1.send("a");
        ch2.send(1);
        ch1.send("b");
        ch2.send(2);
        ch1.send("c");
        ch2.send(3);
        ch1.send("foo");
        ch2.close();
        fib.join();
    }

View Full Code Here

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