Rabbitmq retrieve multiple messages using single synchronous call
Is there a way to receive multiple message using a single synchronous call ?
When I know that there are N messages( N could be a small value less than 10) in the queue, then I should be able to do something like channel.basic_get(String queue, boolean autoAck , int numberofMsg ). I don't want to make multiple requests to the server .
Answer
RabbitMQ's basic.get doesn't support multiple messages unfortunately as seen in the docs. The preferred method to retrieve multiple messages is to use basic.consume which will push the messages to the client avoiding multiple round trips. acks are asynchronous so your client won't be waiting for the server to respond. basic.consume also has the benefit of allowing RabbitMQ to redeliver the message if the client disconnects, something that basic.get cannot do. This can be turned off as well setting no-ack to true.
Setting basic.qos prefetch-count will set the number of messages to push to the client at any time. If there isn't a message waiting on the client side (which would return immediately) client libraries tend to block with an optional timeout.