Examples of org.jgroups.Message

org.jgroups.Message
A Message encapsulates data sent to members of a group. It contains among other things the address of the sender, the destination address, a payload (byte buffer) and a list of headers. Headers are added by protocols on the sender side and removed by protocols on the receiver's side.
The byte buffer can point to a reference, and we can subset it using index and length. However, when the message is serialized, we only write the bytes between index and length. @author Bela Ban @version $Id: Message.java,v 1.94 2008/11/11 09:30:08 belaban Exp $






    public static void testCopyWithOffset() {
        byte[] buf={'b', 'e', 'l', 'a', 'b', 'a', 'n'};
        Message m1=new Message(null, null, buf, 0, 4);
        Message m2=new Message(null, null, buf, 4, 3);


        Message m3, m4;
        m3=m1.copy();
        m4=m2.copy();


        Assert.assertEquals(0, m3.getOffset());
        Assert.assertEquals(4, m3.getLength());
        Assert.assertEquals(4, m3.getBuffer().length);


        Assert.assertEquals(4, m4.getOffset());
        Assert.assertEquals(3, m4.getLength());
        Assert.assertEquals(3, m4.getBuffer().length);
    }

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        Assert.assertEquals(3, m4.getLength());
        Assert.assertEquals(3, m4.getBuffer().length);
    }


    public static void testCopyHeaders() {
        Message m1=new Message(null, null, "hello");
        for(short id: new short[]{1, 2, 10, Global.BLOCKS_START_ID, Global.BLOCKS_START_ID +10}) {
            m1.putHeader(id, new DummyHeader(id));
        }
        System.out.println("Headers for m1: " + m1.printHeaders());


        Message m2=m1.copy(true, Global.BLOCKS_START_ID);
        System.out.println("Headers for m2: " + m2.printHeaders());
        Map<Short,Header> hdrs=m2.getHeaders();
        assert hdrs.size() == 2;
        assert hdrs.containsKey(Global.BLOCKS_START_ID);


        short tmp=Global.BLOCKS_START_ID +10;
        assert hdrs.containsKey(tmp);

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    }






    public static void testSizeNullMessage() throws Exception {
        Message msg=new Message();
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithDest() throws Exception {
        Message msg=new Message(UUID.randomUUID(), null, null);
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithSrc() throws Exception {
        Message msg=new Message(null, UUID.randomUUID(), null);
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithDestAndSrc() throws Exception {
        Message msg=new Message(UUID.randomUUID(), UUID.randomUUID(), null);
        _testSize(msg);
    }

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    }






    public static void testSizeMessageWithDestAndSrcAndFlags() throws Exception {
        Message msg=new Message(UUID.randomUUID(), UUID.randomUUID(), null);
        msg.setFlag(Message.OOB);
        msg.setFlag(Message.DONT_BUNDLE);
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithBuffer() throws Exception {
        Message msg=new Message(null, null, "bela".getBytes());
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithBuffer2() throws Exception {
        Message msg=new Message(null, null, new byte[]{'b', 'e', 'l', 'a'});
        _testSize(msg);
    }

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        _testSize(msg);
    }




    public static void testSizeMessageWithBuffer3() throws Exception {
        Message msg=new Message(null, null, "bela");
        _testSize(msg);
    }

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