Sequential data queues

The BaseDataQueue and DataQueue classes provide the following methods for working with sequential data queues:

• Create a data queue on the server. The Java™ program must specify the maximum size of an entry on the data queue. The Java program can optionally specify additional data queue parameters (FIFO vs LIFO, save sender information, specify authority information, force to disk, and provide a queue description) when the queue is created.
• Peek at an entry on the data queue without removing it from the queue. The Java program can wait or return immediately if no entry is currently on the queue.
• Read an entry off the queue. The Java program can wait or return immediately if no entry is available on the queue.
• Write an entry to the queue.
• Clear all entries from the queue.
• Delete the queue.

The BaseDataQueue class provides additional methods for retrieving the attributes of the data queue.

Examples: Working with sequential data queues

The following sequential data queue examples illustrate how a producer puts items on a data queue and how a consumer takes the items off the queue and processes them:

Example: Using DataQueue classes to put data on a queue

Example: Using DataQueue classes to read entries off a data queue