Examples of org.jnode.shell.io.Pipeline

org.jnode.shell.io.Pipeline
This class provides a buffered byte-stream pipeline implementation that supports multiple sources and sinks. The pipeline has a finite buffer, so a thread that reads and writes to the same pipeline risks deadlock.
Unlike the standard Piped* classes, Pipeline and its related classes do not try to detect dead pipes based on exit of threads. Instead, a pipeline shuts down when the sources are closed, or when {@link #shutdown()} method called.
The intended lifecycle of a Pipeline is as follows:
1. A Pipeline object is instantiated.
2. One or more sources and sinks are created using {@link #createSource()}and {@link #createSink()}.
3. The Pipeline is activated by calling {@link #activate()}.
4. Data is written to the pipeline sources and read from the sinks.
5. The pipeline sources are closed, causing the pipeline to shut down cleanly. Read calls on the sinks will return any remaining buffered data and then signal EOF in the normal way.
6. The sinks are closed, and the Pipeline is shutdown.
@author crawley@jnode.org


    private CommandIO getOutPipeIO(String name) throws IOException {
        if (parent != null) {
            return parent.getOutPipeIO(name);
        } else {
            Pipeline pipe = pipes.get(name);
            if (pipe == null) {
                pipe = new Pipeline();
                pipes.put(name, pipe);
            }
            return new CommandOutput(pipe.createSource());
        }
    }

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    private CommandIO getInPipeIO(String name) throws IOException {
        if (parent != null) {
            return parent.getInPipeIO(name);
        } else {
            Pipeline pipe = pipes.get(name);
            if (pipe == null) {
                pipe = new Pipeline();
                pipes.put(name, pipe);
            }
            return new CommandInput(pipe.createSink());
        }
    }

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        Assert.assertEquals(10000, sink.getCount((byte) '2'));
    }


    @Test
    public void testTwo100_One100() throws Throwable {
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        OutputStream os2 = p.createSource();
        p.activate();


        byte[] buff1 = new byte[100];
        Arrays.fill(buff1, (byte) '1');
        Source source = new Source(buff1, 100, -1, os);
        byte[] buff2 = new byte[100];

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        Assert.assertEquals(10000, sink.getCount((byte) '2'));
    }


    @Test
    public void testTwo100_One100_SmallBuffer() throws Throwable {
        Pipeline p = new Pipeline(100);
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        OutputStream os2 = p.createSource();
        p.activate();


        byte[] buff1 = new byte[100];
        Arrays.fill(buff1, (byte) '1');
        Source source = new Source(buff1, 100, -1, os);
        byte[] buff2 = new byte[100];

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public class PipelineTest {


    @Test
    public void testConstructor() {
        new Pipeline();
    }

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        new Pipeline();
    }


    @Test
    public void testLifecycle() throws IOException {
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        Assert.assertFalse(p.isActive());
        Assert.assertFalse(p.isClosed());
        Assert.assertFalse(p.isShutdown());
        p.activate();
        Assert.assertTrue(p.isActive());
        Assert.assertFalse(p.isClosed());
        Assert.assertFalse(p.isShutdown());
        is.close();
        os.close();
        Assert.assertFalse(p.isActive());
        Assert.assertTrue(p.isClosed());
        Assert.assertFalse(p.isShutdown());
    }

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        Assert.assertFalse(p.isShutdown());
    }


    @Test
    public void testLifecycle2() throws IOException {
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        Assert.assertFalse(p.isActive());
        Assert.assertFalse(p.isShutdown());
        p.activate();
        Assert.assertTrue(p.isActive());
        Assert.assertFalse(p.isShutdown());
        p.shutdown();
        Assert.assertFalse(p.isActive());
        Assert.assertTrue(p.isShutdown());
        Assert.assertEquals(-1, is.read());
        try {
            os.write('X');
            Assert.fail("no exception on write()");
        } catch (IOException ex) {

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    @Test
    public void testOneOne() throws IOException {
        // This should work ... despite the source and sink being operated from
        // the same thread ... because we are reading/writing less than a buffer
        // full.
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        p.activate();
        Assert.assertEquals(0, is.available());
        os.write('A');
        Assert.assertEquals(1, is.available());
        Assert.assertEquals('A', is.read());
        os.write('B');

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        Assert.assertEquals("the quick brown fox", new String(buffer, 0, len));
    }


    @Test
    public void testTwo1_One1() throws Throwable {
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        OutputStream os2 = p.createSource();
        p.activate();


        Source source = new Source("1".getBytes(), 10000, -1, os);
        Source source2 = new Source("2".getBytes(), 10000, -1, os2);
        Sink sink = new Sink(20000, 1, -1, is);

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        Assert.assertEquals(10000, sink.getCount((byte) '2'));
    }


    @Test
    public void testTwo10_One10() throws Throwable {
        Pipeline p = new Pipeline();
        InputStream is = p.createSink();
        OutputStream os = p.createSource();
        OutputStream os2 = p.createSource();
        p.activate();


        Source source = new Source("1111111111".getBytes(), 1000, -1, os);
        Source source2 = new Source("2222222222".getBytes(), 1000, -1, os2);
        Sink sink = new Sink(20000, 10, -1, is);

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