Examples of org.apache.activemq.command.ActiveMQBytesMessage

org.apache.activemq.command.ActiveMQBytesMessage
A BytesMessage object is used to send a message containing a stream of uninterpreted bytes. It inherits from the Message interface and adds a bytes message body. The receiver of the message supplies the interpretation of the bytes.
The BytesMessage methods are based largely on those found in java.io.DataInputStream and java.io.DataOutputStream.
This message type is for client encoding of existing message formats. If possible, one of the other self-defining message types should be used instead.
Although the JMS API allows the use of message properties with byte messages, they are typically not used, since the inclusion of properties may affect the format.
The primitive types can be written explicitly using methods for each type. They may also be written generically as objects. For instance, a call to BytesMessage.writeInt(6) is equivalent to BytesMessage.writeObject(new Integer(6)). Both forms are provided, because the explicit form is convenient for static programming, and the object form is needed when types are not known at compile time.
When the message is first created, and when clearBody is called, the body of the message is in write-only mode. After the first call to reset has been made, the message body is in read-only mode. After a message has been sent, the client that sent it can retain and modify it without affecting the message that has been sent. The same message object can be sent multiple times. When a message has been received, the provider has called reset so that the message body is in read-only mode for the client.
If clearBody is called on a message in read-only mode, the message body is cleared and the message is in write-only mode.
If a client attempts to read a message in write-only mode, a MessageNotReadableException is thrown.
If a client attempts to write a message in read-only mode, a MessageNotWriteableException is thrown. @openwire :marshaller code=24 @see javax.jms.Session#createBytesMessage() @see javax.jms.MapMessage @see javax.jms.Message @see javax.jms.ObjectMessage @see javax.jms.StreamMessage @see javax.jms.TextMessage

        } catch (MessageNotWriteableException mnwe) {
        }
    }


    public void testReadOnlyBody() throws JMSException {
        ActiveMQBytesMessage message = new ActiveMQBytesMessage();
        try {
            message.writeBoolean(true);
            message.writeByte((byte) 1);
            message.writeByte((byte) 1);
            message.writeBytes(new byte[1]);
            message.writeBytes(new byte[3], 0, 2);
            message.writeChar('a');
            message.writeDouble(1.5);
            message.writeFloat((float) 1.5);
            message.writeInt(1);
            message.writeLong(1);
            message.writeObject("stringobj");
            message.writeShort((short) 1);
            message.writeShort((short) 1);
            message.writeUTF("utfstring");
        } catch (MessageNotWriteableException mnwe) {
            fail("Should be writeable");
        }
        message.reset();
        try {
            message.readBoolean();
            message.readByte();
            message.readUnsignedByte();
            message.readBytes(new byte[1]);
            message.readBytes(new byte[2], 2);
            message.readChar();
            message.readDouble();
            message.readFloat();
            message.readInt();
            message.readLong();
            message.readUTF();
            message.readShort();
            message.readUnsignedShort();
            message.readUTF();
        } catch (MessageNotReadableException mnwe) {
            fail("Should be readable");
        }
        try {
            message.writeBoolean(true);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeByte((byte) 1);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeBytes(new byte[1]);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeBytes(new byte[3], 0, 2);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeChar('a');
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeDouble(1.5);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeFloat((float) 1.5);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeInt(1);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeLong(1);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeObject("stringobj");
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeShort((short) 1);
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
        try {
            message.writeUTF("utfstring");
            fail("Should have thrown exception");
        } catch (MessageNotWriteableException mnwe) {
        }
    }

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        } catch (MessageNotWriteableException mnwe) {
        }
    }


    public void testWriteOnlyBody() throws JMSException {
        ActiveMQBytesMessage message = new ActiveMQBytesMessage();
        message.clearBody();
        try {
            message.writeBoolean(true);
            message.writeByte((byte) 1);
            message.writeByte((byte) 1);
            message.writeBytes(new byte[1]);
            message.writeBytes(new byte[3], 0, 2);
            message.writeChar('a');
            message.writeDouble(1.5);
            message.writeFloat((float) 1.5);
            message.writeInt(1);
            message.writeLong(1);
            message.writeObject("stringobj");
            message.writeShort((short) 1);
            message.writeShort((short) 1);
            message.writeUTF("utfstring");
        } catch (MessageNotWriteableException mnwe) {
            fail("Should be writeable");
        }
        try {
            message.readBoolean();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException mnwe) {
        }
        try {
            message.readByte();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readUnsignedByte();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readBytes(new byte[1]);
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readBytes(new byte[2], 2);
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readChar();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readDouble();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readFloat();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readInt();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readLong();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readUTF();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readShort();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readUnsignedShort();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
        try {
            message.readUTF();
            fail("Should have thrown exception");
        } catch (MessageNotReadableException e) {
        }
    }

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            addItem(BODY_PREVIEW, "Body preview", new ArrayType(1, SimpleType.BYTE));
        }


        @Override
        public Map<String, Object> getFields(Object o) throws OpenDataException {
            ActiveMQBytesMessage m = (ActiveMQBytesMessage)o;
            Map<String, Object> rc = super.getFields(o);
            long length = 0;
            try {
                length = m.getBodyLength();
                rc.put(BODY_LENGTH, Long.valueOf(length));
            } catch (JMSException e) {
                rc.put(BODY_LENGTH, Long.valueOf(0));
            }
            try {
                byte preview[] = new byte[(int)Math.min(length, 255)];
                m.readBytes(preview);


                // This is whack! Java 1.5 JMX spec does not support primitive
                // arrays!
                // In 1.6 it seems it is supported.. but until then...
                Byte data[] = new Byte[preview.length];

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     *             if the JMS provider fails to create this message due to some
     *             internal error.
     */
    public BytesMessage createBytesMessage() throws JMSException {
        checkClosed();
        ActiveMQBytesMessage message = new ActiveMQBytesMessage();
        message.setConnection(connection);
        return message;
    }

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        flushBuffer();
    }
    
    private void flushBuffer() throws IOException {
        try {
            ActiveMQBytesMessage msg = new ActiveMQBytesMessage();
            msg.writeBytes(buffer, 0, count);
            send(msg, false);
        } catch (JMSException e) {
            throw IOExceptionSupport.create(e);
        }
        count=0;

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                            throw new IOException("Received an unexpected message: expected ID: " + (nextSequenceId - 1)  +  " but was: " + producerSequenceId + " for message: "+m);
                        }
                    }
                    
                    // Read the buffer in.
                    ActiveMQBytesMessage bm = (ActiveMQBytesMessage) m;
                    buffer = new byte[(int) bm.getBodyLength()];
                    bm.readBytes(buffer);
                    pos=0;                    
                } else {
                    eosReached=true;
                }
                return;

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            ActiveMQMessage activeMessage = null;


            if (message instanceof BytesMessage) {
                BytesMessage bytesMsg = (BytesMessage) message;
                bytesMsg.reset();
                ActiveMQBytesMessage msg = new ActiveMQBytesMessage();
                msg.setConnection(connection);
                try {
                    for (;;) {
                        // Reads a byte from the message stream until the stream
                        // is empty
                        msg.writeByte(bytesMsg.readByte());
                    }
                } catch (MessageEOFException e) {
                    // if an end of message stream as expected
                } catch (JMSException e) {
                }


                activeMessage = msg;
            } else if (message instanceof MapMessage) {
                MapMessage mapMsg = (MapMessage) message;
                ActiveMQMapMessage msg = new ActiveMQMapMessage();
                msg.setConnection(connection);
                Enumeration iter = mapMsg.getMapNames();


                while (iter.hasMoreElements()) {
                    String name = iter.nextElement().toString();
                    msg.setObject(name, mapMsg.getObject(name));
                }


                activeMessage = msg;
            } else if (message instanceof ObjectMessage) {
                ObjectMessage objMsg = (ObjectMessage) message;
                ActiveMQObjectMessage msg = new ActiveMQObjectMessage();
                msg.setConnection(connection);
                msg.setObject(objMsg.getObject());
                msg.storeContent();
                activeMessage = msg;
            } else if (message instanceof StreamMessage) {
                StreamMessage streamMessage = (StreamMessage) message;
                streamMessage.reset();
                ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
                msg.setConnection(connection);
                Object obj = null;


                try {
                    while ((obj = streamMessage.readObject()) != null) {
                        msg.writeObject(obj);
                    }
                } catch (MessageEOFException e) {
                    // if an end of message stream as expected
                } catch (JMSException e) {
                }


                activeMessage = msg;
            } else if (message instanceof TextMessage) {
                TextMessage textMsg = (TextMessage) message;
                ActiveMQTextMessage msg = new ActiveMQTextMessage();
                msg.setConnection(connection);
                msg.setText(textMsg.getText());
                activeMessage = msg;
            } else {
                activeMessage = new ActiveMQMessage();
                activeMessage.setConnection(connection);
            }

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    }


    public void testConvertingByteArrayToBytesMessage() throws JMSException
    {
        Session session = mock(Session.class);
        when(session.createBytesMessage()).thenReturn(new ActiveMQBytesMessage());


        byte[] bytesArray = new byte[]{1, 2};
        BytesMessage message = (BytesMessage) JmsMessageUtils.toMessage(bytesArray, session);


        // Makes the message readable

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  protected TextMessage createTextMessage() throws ResourceInitializationException {
    return new ActiveMQTextMessage();
  }


  protected BytesMessage createBytesMessage() throws ResourceInitializationException {
    return new ActiveMQBytesMessage();
  }

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     * @return the an ActiveMQBytesMessage
     * @throws JMSException if the JMS provider fails to create this message due
     *                 to some internal error.
     */
    public BytesMessage createBytesMessage() throws JMSException {
        ActiveMQBytesMessage message = new ActiveMQBytesMessage();
        configureMessage(message);
        return message;
    }

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