XREAD command in Redis is utilized for reading data from one or more streams, where data is stored as key-value pairs. This is commonly used in cases where you need to make your application respond to stream changes, similar to pub/sub pattern but with the ability to receive past messages.
Here's an example of using
XREAD in Go with the "go-redis" package:
In this example, we're creating a connection to a local Redis instance and reading from the 'mystream' stream. The
$ character indicates that we want to read from the latest message. If there are any messages, they're printed to the console.
XREADerrors appropriately instead of using
XREADto fail. Always ensure the stream name and ID are correct.
$will give you only new messages. If you want to process old messages as well, use
0or the specific message ID.
Q: Can I read from multiple streams with XREAD?
A: Yes, Redis's
XREAD command supports reading from multiple streams at once. You can specify multiple streams in the
Streams slice of
Q: What does the '$' character mean when reading from a stream in Redis?
A: When reading from a stream in Redis, the
$ character represents the latest message in the stream. If you want to read from the start of the stream, you can use