This chapter contains an overview of the C++RTL specific data types and constants. A brief explanation of each data type along with sizes is provided.
Basic Data Types and their Sizes
This section lists the basic data types used in C++RTL APIs, indicating the size of each.
- mqbyte - Data defined to occupy 8 bits (unsigned).
- mqchar - Data defined to occupy 8 bits.
- mqshort - Data defined to occupy 16 bits.
- mqint - Data defined to occupy 32 bits.
- mqlong - Data defined to occupy 64 bits.
- mqfloat - Data defined to occupy 32 bits.
- mqdouble - Data defined to occupy 64 bits.
All required public constants are categorized and declared in common_def.h according to JMS specifications.
Messaging related constants are required while creating sessions and sending messages to a queue or topic on the FioranoMQ Server.
Following are the possible values of the acknowledgement mode that can be used while creating a TopicSession or a QueueSession:
- #define AUTO_ACKNOWLEDGE 1
- #define CLIENT_ACKNOWLEDGE 2
- #define DUPS_OK_ACKNOWLEDGE 3
Following are the permissible values for the message delivery mode that can be used in publish or send call. The persistence of a message is decided using these constants:
- #define NON_PERSISTENT 1
- #define PERSISTENT 2
Following are the string representations of the various message types that can be sent by a C client to the FioranoMQ Server. A call of MSG_getJMSType returns one of these values:
- #define JMSMESSAGE “Message"
- #define BYTESMESSAGE "BytesMessage"
- #define STREAMMESSAGE "StreamMessage"
- #define MAPMESSAGE "MapMessage"
- #define TEXTMESSAGE "TextMessage"
Following are some of the permissible values for message priority that can be used in publish or send call:
- #define MinPriority 0
- #define MaxPriority 9
- #define LowPriority 0
- #define NormPriority 4
- #define HighPriority 9
The C++RTL adheres to the following naming convention for you to easily identify the classes, constants and member functions with the corresponding definitions in JMS specifications.
As defined in JMS specifications