Processing Messages (SAP Library - Using Java Message Service)

Processing Messages

Use

There are several message types defined by the JMS specification that the applications can create and receive, all implementing the javax.jms.Message interface.

· Generic Message – consists only of a message header and properties.

· Byte Message – represents an array of bytes.

· Map Message – contains a set of name-value pairs.

· Object Message – has a payload that is a Serializable Java object.

· Stream Message – contains a stream of Java primitive values.

· Text Message – contains java.lang.String object.

Procedure

Processing Byte Message

// create a byte array with the received data

byte[] receivedBytes;

// create an integer object to receive the data with that specified length:

int dataLength;

// get the data from the Bytes Message:

dataLength = bytesMessage.readBytes(receivedBytes);

Processing Map Message

String stringData;

long longData;

stringData = mapMessage.getString(“message”);

longData = mapMessage.getLong(“long”);

Processing Objects Message

String stringValue;

long longValue;

Class_Implementing_Serialaizable cis = new Class_Implementing_Serialaizable();

cis = objectMessage.getObject();

stringValue = cis.getString();

longValue = cis.getLong();

Processing Stream Message

String stringValue;

long longValue;

stringValue = streamMessage.readString();

longValue = streamMessage.readLong();

Processing Text Message

String text;

text = textMessage.getText();