In rabbitmq, channel is a virtual connection inside a connection and publishing or consuming a message from queue will happen over a channel.
In rabbitmq web management portal, the Channels tab will show all the live channels of both producer and consumer messages along with that it will also show username, mode, state of channel, unconfirmed, prefetch, etc. columns like as shown below.
Following table will illustrate more details about the columns in channels section.
|Mode||The Mode column can be either C (confirm) or T (transactional). If channel is transactional, then mode is T in case channel streaming publish confirmations then mode C.|
|State||It is used to show the state of channel.|
|Unconfirmed||It is used to show the number of published messages not yet confirmed.|
|Prefetch||It is used to show the details of per channel limit. In rabbitmq, each channel can have two prefetch counts one is per-consumer count, which will limit each new consumer created on the channel, and a global count, which is shared between all consumers on the channel|
|Unacked||It is used to show details of consumer that has promised to process them but has not acknowledged that they are processed .|
|publish||It is used to show the message rates for publishing.|
|confirm||It is used to show the message rates for confirming.|
|deliver / get||It is used to show the delivered details.|
|ack||It is used to show the acknowledge details.|
In case, if you want to see details of particular channel, then click on particular channel name for example if we click on “[::1]:57086 (1)” channel then it will show all the details related to that channel like as shown below.
This is how we can use channels in rabbitmq based on our requirements.