Examples of org.jgroups.util.ByteArrayDataOutputStream

org.jgroups.util.ByteArrayDataOutputStream
Implements {@link java.io.DataOutput} over a byte[] buffer. The byte[] buffer expands when needed; however, itdoesn't double but only expands minimally, to accommodate the additional data. It is therefore recommended to always size the buffer to the actual number of bytes needed. This class is not thread safe. @author Bela Ban @since 3.5

    @Override
    protected void sendMcastDiscoveryRequest(Message msg) {
        try {
            if(msg.getSrc() == null)
                msg.setSrc(local_addr);
            ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(128);
            msg.writeTo(out);
            for(int i=bind_port; i <= bind_port+port_range; i++) {
                DatagramPacket packet=new DatagramPacket(out.buffer(), 0, out.position(), dest_addr, i);
                sock.send(packet);
            }
        }
        catch(Exception ex) {
            log.error("failed sending discovery request", ex);

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        TpHeader hdr=(TpHeader)msg.getHeader(this.id);
        if(hdr == null)
            throw new Exception("message " + msg + " doesn't have a transport header, cannot route it");
        String group=cluster_name != null? cluster_name.toString() : null;


        ByteArrayDataOutputStream dos=new ByteArrayDataOutputStream((int)(msg.size() + 50));
        writeMessage(msg, dos, dest == null);


        if(stats) {
            num_msgs_sent++;
            num_bytes_sent+=dos.position();
        }
        List<RouterStub> stubs = stubManager.getStubs();
        if(dest == null)
            tunnel_policy.sendToAllMembers(stubs, group, dos.buffer(), 0, dos.position());
        else
            tunnel_policy.sendToSingleMember(stubs, group, dest, dos.buffer(), 0, dos.position());
    }

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        TpHeader hdr=(TpHeader)msg.getHeader(this.id);
        if(hdr == null)
            throw new Exception("message " + msg + " doesn't have a transport header, cannot route it");
        String group=cluster_name != null? cluster_name.toString() : null;


        ByteArrayDataOutputStream dos=new ByteArrayDataOutputStream((int)(msg.size() + 50));
        writeMessage(msg, dos, dest == null);


        if(stats) {
            num_msgs_sent++;
            num_bytes_sent+=dos.position();
        }
        List<RouterStub> stubs = stubManager.getStubs();
        if(dest == null)
            tunnel_policy.sendToAllMembers(stubs, group, dos.buffer(), 0, dos.position());
        else
            tunnel_policy.sendToSingleMember(stubs, group, dest, dos.buffer(), 0, dos.position());
    }

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        return 100.0* (1.0 - (new_length / (double)old_length));
    }


    private static Buffer marshal(Message msg) throws Exception {
        ByteArrayDataOutputStream dos=new ByteArrayDataOutputStream((int)(msg.size() + 50));
        Address dest=msg.getDest();
        boolean multicast=dest == null;
        writeMessage(msg, dos, multicast);
        return dos.getBuffer();
    }

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            assert ex instanceof IndexOutOfBoundsException;
        }
    }


    public void testExpanding() throws IOException {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(1);
        for(int i='A'; i < 'A' + 20; i++)
            out.write(i);
        assert out.position() == 20;


        byte[] buffer=new byte[20];
        for(int i=0; i < 5; i++)
            out.write(buffer);
        assert out.position() == 120;
    }

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            out.write(buffer);
        assert out.position() == 120;
    }


    public void testExpanding2() {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(1);
        out.write(new byte[]{'b', 'e', 'l', 'a'});


        out=new ByteArrayDataOutputStream(1);
        out.writeBoolean(true);
        out.writeBoolean(false);


        out=new ByteArrayDataOutputStream(1);
        out.writeShort(22);
        out.writeShort(23);


        out=new ByteArrayDataOutputStream(1);
        out.writeInt(23);
        out.writeInt(24);
    }

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            assert eof_ex instanceof EOFException;
        }
    }


    public void testByte() throws IOException {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(Byte.MAX_VALUE * 2);
        for(short i=Byte.MIN_VALUE; i <= Byte.MAX_VALUE; i++)
            out.writeByte(i);


        ByteArrayDataInputStream in=new ByteArrayDataInputStream(out.buffer());
        for(short i=Byte.MIN_VALUE; i <= Byte.MAX_VALUE; i++) {
            byte read=in.readByte();
            assert i == read;
        }
    }

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            assert i == read;
        }
    }


    public void testUnsignedByte() throws IOException {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(20);
        byte[] bytes={-100, -50, 0, 1, 100, 127};
        for(byte b: bytes)
            out.writeByte(b);
        ByteArrayDataInputStream in=new ByteArrayDataInputStream(out.buffer());
        for(byte b: bytes) {
            int tmp=in.readUnsignedByte();
            assert tmp == (b & 0xff);
        }
    }

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            assert tmp == (b & 0xff);
        }
    }


    public void testBoolean() throws Exception {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(2);
        out.writeBoolean(true);
        out.writeBoolean(false);
        ByteArrayDataInputStream in=new ByteArrayDataInputStream(out.buffer());
        assert in.readBoolean();
        assert !in.readBoolean();
    }

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        assert in.readBoolean();
        assert !in.readBoolean();
    }


    public void testShort() throws IOException {
        ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(Short.MAX_VALUE * 4 + 10);
        for(int i=Short.MIN_VALUE; i <= Short.MAX_VALUE; i++)
            out.writeShort(i);


        ByteArrayDataInputStream in=new ByteArrayDataInputStream(out.buffer());
        for(int i=Short.MIN_VALUE; i <= Short.MAX_VALUE; i++) {
            short read=in.readShort();
            assert i == read;
        }
    }

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Related Classes of org.jgroups.util.ByteArrayDataOutputStream

org.jgroups.protocols.BPING

org.jgroups.protocols.TUNNEL

org.jgroups.tests.ByteArrayDataInputOutputStreamTest

org.jgroups.tests.MessageSizeTest

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