Examples of org.apache.activemq.command.ActiveMQStreamMessage

org.apache.activemq.command.ActiveMQStreamMessage
A StreamMessage object is used to send a stream of primitive types in the Java programming language. It is filled and read sequentially. It inherits from the Message interface and adds a stream message body. Its methods are based largely on those found in java.io.DataInputStream and java.io.DataOutputStream.

The primitive types can be read or written explicitly using methods for each type. They may also be read or written generically as objects. For instance, a call to StreamMessage.writeInt(6) is equivalent to StreamMessage.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 body 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.

StreamMessage objects support the following conversion table. The marked cases must be supported. The unmarked cases must throw a JMSException. The String-to-primitive conversions may throw a runtime exception if the primitive's valueOf() method does not accept it as a valid String representation of the primitive.

A value written as the row type can be read as the column type.
```
 | | boolean byte short char int long float double String byte[] |---------------------------------------------------------------------- |boolean | X X |byte | X X X X X |short | X X X X |char | X X |int | X X X |long | X X |float | X X X |double | X X |String | X X X X X X X X |byte[] | X |---------------------------------------------------------------------- 
```
Attempting to read a null value as a primitive type must be treated as calling the primitive's corresponding valueOf(String) conversion method with a null value. Since char does not support a String conversion, attempting to read a null value as a char must throw a NullPointerException. @openwire :marshaller code="27" @see javax.jms.Session#createStreamMessage() @see javax.jms.BytesMessage @see javax.jms.MapMessage @see javax.jms.Message @see javax.jms.ObjectMessage @see javax.jms.TextMessage

                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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                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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        sendStreamMessage(httpConnectionFactory, true);
        doTestStreamMessageCompression();
    }


    private void doTestStreamMessageCompression() throws Exception {
        ActiveMQStreamMessage tcpMessage = (ActiveMQStreamMessage) tcpConsumer.receive(TimeUnit.SECONDS.toMillis(3));
        ActiveMQStreamMessage httpMessage = (ActiveMQStreamMessage) httpConsumer.receive(TimeUnit.SECONDS.toMillis(3));


        assertNotNull(tcpMessage);
        assertNotNull(httpMessage);


        ByteSequence tcpContent = tcpMessage.getContent();
        ByteSequence httpContent = httpMessage.getContent();


        assertNotNull(tcpContent);
        assertNotNull(httpContent);


        assertTrue(tcpMessage.isCompressed());
        assertTrue(httpMessage.isCompressed());


        int tcpCompressedSize = tcpContent.getLength();
        int httpCompressedSize = httpContent.getLength();


        assertEquals(tcpContent.getLength(), httpContent.getLength());
        assertEquals(tcpMessage.readString(), httpMessage.readString());


        LOG.info("Received Message on TCP: " + tcpMessage.toString());
        LOG.info("Received Message on HTTP: " + httpMessage.toString());


        sendStreamMessage(false);


        ActiveMQStreamMessage uncompressedHttpMessage = (ActiveMQStreamMessage)
            httpConsumer.receive(TimeUnit.SECONDS.toMillis(3));
        int httpUncompressedSize = uncompressedHttpMessage.getContent().getLength();


        assertTrue(httpUncompressedSize > httpCompressedSize);
        assertTrue(httpUncompressedSize > tcpCompressedSize);
    }

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

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

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

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      assertTrue("Transforming a MapMessage message to an ActiveMQMapMessage",ActiveMQMessageTransformation.transformMessage((MapMessage)new ActiveMQMapMessage(), null) instanceof ActiveMQMapMessage);
      
      assertTrue("Transforming an ObjectMessage message to an ActiveMQObjectMessage",ActiveMQMessageTransformation.transformMessage((ObjectMessage)new ActiveMQObjectMessage(), null) instanceof ActiveMQObjectMessage);
      
      assertTrue("Transforming a StreamMessage message to an ActiveMQStreamMessage",ActiveMQMessageTransformation.transformMessage((StreamMessage)new ActiveMQStreamMessage(), null) instanceof ActiveMQStreamMessage);
      
      assertTrue("Transforming a TextMessage message to an ActiveMQTextMessage",ActiveMQMessageTransformation.transformMessage((TextMessage)new ActiveMQTextMessage(), null) instanceof ActiveMQTextMessage);
      
        assertTrue("Transforming an ActiveMQMessage message to an ActiveMQMessage",ActiveMQMessageTransformation.transformMessage(new ActiveMQMessage(), null) instanceof ActiveMQMessage);
    }

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        protected void init() throws OpenDataException {
            super.init();
        }


        public Map getFields(Object o) throws OpenDataException {
            ActiveMQStreamMessage m = (ActiveMQStreamMessage) o;
            Map rc = super.getFields(o);
            return rc;
        }

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    public ActiveMQStreamMessageTest(String arg0) {
        super(arg0);
    }


    public void testGetDataStructureType() {
        ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
        assertEquals(msg.getDataStructureType(), CommandTypes.ACTIVEMQ_STREAM_MESSAGE);
    }

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        ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
        assertEquals(msg.getDataStructureType(), CommandTypes.ACTIVEMQ_STREAM_MESSAGE);
    }


    public void testReadBoolean() {
        ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
        try {
            msg.writeBoolean(true);
            msg.reset();
            assertTrue(msg.readBoolean());
            msg.reset();
            assertTrue(msg.readString().equals("true"));
            msg.reset();
            try {
                msg.readByte();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readShort();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readInt();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readLong();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readFloat();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readDouble();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readChar();
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
            msg.reset();
            try {
                msg.readBytes(new byte[1]);
                fail("Should have thrown exception");
            } catch (MessageFormatException mfe) {
            }
        } catch (JMSException jmsEx) {
            jmsEx.printStackTrace();

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Related Classes of org.apache.activemq.command.ActiveMQStreamMessage

org.apache.activemq.ActiveMQConnection

org.apache.activemq.ActiveMQMessageTransformation

org.apache.activemq.ActiveMQSession

org.apache.activemq.broker.jmx.OpenTypeSupport$StreamMessageOpenTypeFactory

org.apache.activemq.command.ActiveMQStreamMessageTest

org.apache.activemq.MessageTransformationTest

org.apache.activemq.network.CompressionOverNetworkTest

org.apache.activemq.openwire.v1.ActiveMQStreamMessageMarshaller

org.apache.activemq.openwire.v1.ActiveMQStreamMessageTest

org.apache.activemq.openwire.v2.ActiveMQStreamMessageMarshaller

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