Keyed data queues

BaseDataQueue

KeyedDataQueue

• Create a keyed data queue on the server. The Java™ program must specify key length and maximum size of an entry on the queue. The Java program can optionally specify authority information, save sender information, force to disk, and provide a queue description.
• Peek at an entry based on the specified key without removing it from the queue. The Java program can wait or return immediately if no entry is currently on the queue that matches the key criteria.
• Read an entry off the queue based on the specified key. The Java program can wait or return immediately if no entry is available on the queue that matches the key criteria.
• Write a keyed entry to the queue.
• Clear all entries or all entries that match a specified key.
• Delete the queue.

The BaseDataQueue and KeyedDataQueue classes also provide additional methods for retrieving the attributes of the data queue.

Examples: Working with keyed data queues

The following keyed 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 KeyedDataQueue

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