This static method listens for messages on one or more queues for one or more consumers as specified in the array of OracleAQAgent objects.

Declaration

// C#
public static OracleAQAgent Listen(OracleConnection con, OracleAQAgent[]
  listenConsumers);

Parameters

• con

  An OracleConnection instance.

• listenConsumers

  The array of consumers being listened for. The name of the OracleAQAgent object must be null or empty for single consumer queues.

Return Value

An OracleAQAgent object.

Exceptions

ArgumentNullException - The con or listenConsumers parameter is null.

InvalidOperationException - The connection is not open.

Remarks

Listen is useful in situations where one needs to monitor multiple queues until a message is available for a consumer in one of the queues. The Name property of the OracleAQAgent object represents the name of the consumer and the Address property represents the name of the queue.

This call blocks the calling thread until there is a message ready for consumption for a consumer in the list. It returns an OracleAQAgent object which specifies the consumer and queue for which a message is ready to be dequeued.