Examples of org.codehaus.activemq.message.ActiveMQStreamMessage

org.codehaus.activemq.message.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. @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

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

View Full Code Here

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

View Full Code Here

    /**
     * @return a new Packet instance
     */


    public Packet createPacket() {
        return new ActiveMQStreamMessage();
    }

View Full Code Here

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

View Full Code Here

    }
  }


  public void testReadLong()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      long test = 4l;
      msg.writeLong(test);
      msg.reset();
      assertTrue(msg.readLong()==test);
      msg.reset();
      assertTrue(msg.readString().equals(new Long(test).toString()));
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();
      assertTrue(false);
    }
  }

View Full Code Here

    }
  }


  public void testReadFloat()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      float test = 4.4f;
      msg.writeFloat(test);
      msg.reset();
      assertTrue(msg.readFloat()==test);
      msg.reset();
      assertTrue(msg.readDouble()==test);
      msg.reset();
      assertTrue(msg.readString().equals(new Float(test).toString()));
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();
      assertTrue(false);
    }
  }

View Full Code Here

    }
  }


  public void testReadDouble()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      double test = 4.4d;
      msg.writeDouble(test);
      msg.reset();
      assertTrue(msg.readDouble()==test);
      msg.reset();
      assertTrue(msg.readString().equals(new Double(test).toString()));
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();
      assertTrue(false);
    }
  }

View Full Code Here

    }
  }


  public void testReadString()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      byte testByte = (byte)2;
      msg.writeString(new Byte(testByte).toString());
      msg.reset();
      assertTrue(msg.readByte()==testByte);
      msg.clearBody();
      short testShort = 3;
      msg.writeString(new Short(testShort).toString());
      msg.reset();
      assertTrue(msg.readShort()==testShort);
      msg.clearBody();
      int testInt = 4;
      msg.writeString(new Integer(testInt).toString());
      msg.reset();
      assertTrue(msg.readInt()==testInt);
      msg.clearBody();
      long testLong = 6l;
      msg.writeString(new Long(testLong).toString());
      msg.reset();
      assertTrue(msg.readLong()==testLong);
      msg.clearBody();
      float testFloat = 6.6f;
      msg.writeString(new Float(testFloat).toString());
      msg.reset();
      assertTrue(msg.readFloat()==testFloat);
      msg.clearBody();
      double testDouble = 7.7d;
      msg.writeString(new Double(testDouble).toString());
      msg.reset();
      assertTrue(msg.readDouble()==testDouble);
      msg.clearBody();
      msg.writeString("true");
      msg.reset();
      assertTrue(msg.readBoolean());
      
      
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();
      assertTrue(false);

View Full Code Here

    }
  }


  public void testReadBytes()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      byte[] test = new byte[50];
      for(int i =0; i< test.length;i++){
        test[i]=(byte)i;
      }
      msg.writeBytes(test);
      msg.reset();
      byte[] valid = new byte[test.length];
      msg.readBytes(valid);
      for(int i = 0; i < valid.length;i++){
        assertTrue(valid[i]==test[i]);
      }
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();

View Full Code Here

    }
  }


  public void testReadObject()
  {
    ActiveMQStreamMessage msg = new ActiveMQStreamMessage();
    try {
      byte testByte = (byte)2;
      msg.writeByte(testByte);
      msg.reset();
      assertTrue(((Byte)msg.readObject()).byteValue()==testByte);
      msg.clearBody();
      
      short testShort = 3;
      msg.writeShort(testShort);
      msg.reset();
      assertTrue(((Short)msg.readObject()).shortValue()==testShort);
      msg.clearBody();
      
      int testInt = 4;
      msg.writeInt(testInt);
      msg.reset();
      assertTrue(((Integer)msg.readObject()).intValue()==testInt);
      msg.clearBody();
      
      long testLong = 6l;
      msg.writeLong(testLong);
      msg.reset();
      assertTrue(((Long)msg.readObject()).longValue()==testLong);
      msg.clearBody();
      
      float testFloat = 6.6f;
      msg.writeFloat(testFloat);
      msg.reset();
      assertTrue(((Float)msg.readObject()).floatValue()==testFloat);
      msg.clearBody();
      
      double testDouble = 7.7d;
      msg.writeDouble(testDouble);
      msg.reset();
      assertTrue(((Double)msg.readObject()).doubleValue()==testDouble);
      msg.clearBody();
      
      char testChar = 'z';
      msg.writeChar(testChar);
      msg.reset();
      assertTrue(((Character)msg.readObject()).charValue()==testChar);
      msg.clearBody();
      
      byte[] data = new byte[50];
      for(int i = 0; i < data.length;i++){
        data[i] = (byte)i;
      }
      msg.writeBytes(data);
      msg.reset();
      byte[] valid = (byte[])msg.readObject();
      assertTrue(valid.length==data.length);
      for(int i =0; i < valid.length;i++){
        assertTrue(valid[i]==data[i]);
      }
      msg.clearBody();
      msg.writeBoolean(true);
      msg.reset();
      assertTrue(((Boolean)msg.readObject()).booleanValue());
      
      
    }catch(JMSException jmsEx){
      jmsEx.printStackTrace();
      assertTrue(false);

View Full Code Here

0 1 2 3 4

TOP

Related Classes of org.codehaus.activemq.message.ActiveMQStreamMessage

org.codehaus.activemq.ActiveMQSession

org.codehaus.activemq.io.impl.ActiveMQStreamMessageReader

org.codehaus.activemq.io.impl.ActiveMQStreamMessageReaderTest

org.codehaus.activemq.message.ActiveMQStreamMessageReaderTest

org.codehaus.activemq.message.ActiveMQStreamMessageTest

org.codehaus.activemq.message.util.ByteArray

org.codehaus.activemq.message.util.ByteArrayCompression

javax.jms.MessageNotReadableException

java.io.DataOutputStream

java.io.ByteArrayInputStream

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.