Examples of BlockingInputStream

org.exist.storage.io.BlockingInputStream
BlockingInputStream is a combination of an input stream and an output stream, connected through a (circular) buffer in memory. It is intended for coupling producer threads to consumer threads via a (byte) stream. When the buffer is full producer threads will be blocked until the buffer has some free space again. When the buffer is empty the consumer threads will be blocked until some bytes are available again. Closing of the output stream will block until the inputstream is closed. A special version of the close function enables the consumer threads to specify that an exception has occurred. This will cause producer calls to be unblocked and throw an IOException containing this exception as cause. @author Chris Offerman
org.jgroups.util.BlockingInputStream
Bounded input stream. A consumer reads bytes until the end of the stream is reached, or the input stream is closed. The producer writes bytes to the tail and blocks if the capacity has been reached (until the consumer reads more bytes).
This class is for only 1 producer and 1 consumer; multiple producers/consumers will most likely yield incorrect results !
Note that the implementation of this class is optimized for reading and adding a few K at a time; performance will be suboptimal if single bytes are added and read. @author Bela Ban @since 2.12.2

Examples of org.jgroups.util.BlockingInputStream

        in.write(buf, 0, buf.length);
    }




    public void testReadOnClosedInputStream() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(100);
        in.close();
        byte[] buf=new byte[100];
        int num=in.read(buf, 0, buf.length);
        assert num == -1 : " expected -1 (EOF) but got " + num;
    }

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

        assert num == -1 : " expected -1 (EOF) but got " + num;
    }


    
    public void testWriteCloseRead() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(100);
        for(int i=1; i <= 5; i++) {
            byte[] buf=("Hello world " + i).getBytes();
            in.write(buf);
        }
        in.close();


        int size=in.available();
        byte[] buf=new byte[100];
        int num=in.read(buf);
        assert num == size;
    }

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

        assert num == size;
    }




    public void testWriteCloseRead2() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(100);
        StringBuilder sb=new StringBuilder();
        for(int i=1; i <=10; i++)
            sb.append("Hello world " + i);
        byte[] buffer=sb.toString().getBytes();
        new Writer(in, buffer).start();
        Util.sleep(500);


        byte[] buf=new byte[200];
        int num=in.read(buf);
        assert num == buffer.length;
    }

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

        int num=in.read(buf);
        assert num == buffer.length;
    }


    public void testWriteCloseRead3() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(300);
        StringBuilder sb=new StringBuilder();
        for(int i=1; i <=10; i++)
            sb.append("Hello world " + i);
        byte[] buffer=sb.toString().getBytes();
        new Writer(in, buffer).execute(); // don't use a separate thread


        byte[] buf=new byte[200];
        int num=in.read(buf);
        assert num == buffer.length;
    }

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

    }




    
    public void testSimpleTransfer() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(100);
        byte[] buffer=new byte[500];
        for(int i=0; i < buffer.length; i++)
            buffer[i]=(byte)(i % 2 == 0? 0 : 1);
        new Writer(in, buffer).start();
        
        byte[] tmp=new byte[500];
        int offset=0;
        while(true) {
            int bytes=in.read(tmp, offset, tmp.length - offset);
            if(bytes == -1)
                break;
            offset+=bytes;
        }
        System.out.println("read " + offset + " bytes");

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

        }
    }




    public void testLargeTransfer() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(8192);
        final byte[] buffer=generateBuffer(1000000);
        new Writer(in, buffer).start();


        byte[] tmp=new byte[buffer.length];
        int offset=0;
        while(true) {
            int bytes=in.read(tmp, offset, tmp.length - offset);
            if(bytes == -1)
                break;
            offset+=bytes;
        }
        System.out.println("read " + offset + " bytes");

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

            assert buffer[i] == tmp[i];
        System.out.println("OK");
    }


    public void testLargeTransfer2() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(8192);
        final byte[] buffer=generateBuffer(1000000);
        new Writer(in, buffer).start();


        byte[] tmp=new byte[buffer.length];
        int bytes=in.read(tmp); // reads 1 million bytes in one go


        System.out.println("read " + bytes + " bytes");
        assert bytes == buffer.length : "read " + bytes + " bytes but expected " + buffer.length;
        System.out.print("Verifying that the buffers are the same: ");
        for(int i=0; i < tmp.length; i++)

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

            assert buffer[i] == tmp[i];
        System.out.println("OK");
    }


    public void testWriterMultipleChunks() throws Exception {
        final BlockingInputStream in=new BlockingInputStream(100);
        final byte[] buffer=generateBuffer(500);
        Writer writer=new Writer(in, buffer, 5, true);
        writer.start();


        byte[] tmp=new byte[20];
        int num=0;
        while(true) {
            int read=in.read(tmp);
            if(read == -1)
                break;
            num+=read;
        }
        System.out.println("read " + num + " bytes");

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

        System.out.println("read " + num + " bytes");
        assert num == 5 * buffer.length;
    }


    public void testMultipleWriters() throws Exception {
        final BlockingInputStream in=new BlockingInputStream(100);
        final byte[] buffer=generateBuffer(500);


        final Writer[] writers=new Writer[5];
        for(int i=0; i < writers.length; i++) {
            writers[i]=new Writer(in, buffer, 1, false);
            writers[i].setName("writer-" + (i+1));
            writers[i].start();
        }


        new Thread() {
            public void run() {
                while(true) {
                    boolean all_done=true;
                    for(Writer writer: writers) {
                        if(writer.isAlive()) {
                            all_done=false;
                            break;
                        }
                    }
                    if(all_done) {
                        Util.close(in);
                        return;
                    }
                    else
                        Util.sleep(100);
                }
            }
        }.start();


        byte[] tmp=new byte[400];
        int num=0;
        while(true) {
            int read=in.read(tmp, 0, tmp.length);
            if(read == -1)
                break;
            num+=read;
        }
        System.out.println("read " + num + " bytes");

View Full Code Here

Examples of org.jgroups.util.BlockingInputStream

            assert writer.isAlive() == false;
    }




    public void testWriteExceedingCapacity() throws IOException {
        final BlockingInputStream in=new BlockingInputStream(10);
        new Thread() {
            public void run() {
                byte[] tmp=new byte[20];
                int num=0;
                try {
                    while(true) {
                        int read=in.read(tmp);
                        if(read == -1)
                            break;
                        num+=read;
                    }
                    System.out.println("read " + num + " bytes");
                }
                catch(IOException e) {
                    e.printStackTrace();
                }
            }
        }.start();


        byte[] buffer=new byte[15];
        try {
            in.write(buffer);
        }
        finally {
            Util.close(in);
        }
    }

View Full Code Here

0 1 2

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.