iSeries Access for Windows Data Queues APIs

Use iSeries™ Access for Windows^® Data Queues application programming interfaces (APIs) to provide easy access to iSeries data queues. Data queues allow you to create client/server applications that do not require the use of communications APIs.

• Data queues
  A data queue is a system object that exists on the iSeries system.
• Ordering data queue messages
  There are three ways to designate the order of messages on a data queue:
• Work with data queues
  You can work with data queues by using iSeries CL commands or callable programming interfaces. Access to data queues is available to all iSeries applications regardless of the programming language in which the application is written.
• Typical use of data queues
  A data queue is a powerful program-to-program interface. Programmers who are familiar with programming on the iSeries servers are accustomed to using queues. Data queues simply represent a method that is used to pass information to another program.
• Data Queues: Create, delete, and open APIs
  Use these APIs in conjunction with the cwbCO_SysHandle System Object handle.
• Data Queues: Accessing data queues APIs
  After the cwbDQ_Open API is used to create a connection to a specific data queue, these other APIs can be used to utilize it. Use the cwbDQ_Close API when the connection no longer is needed.
• Data Queues: Attributes APIs
  Use these APIs to declare attributes of a data queue. The attribute object is used when creating a data queue or when obtaining the data queue attributes.
• Data Queues: Read and write APIs
  Use these APIs for writing to and reading from a data queue
• Example: Using Data Queues APIs
  The following example illustrates using Data Queues APIs.