UnifiedJedis is missing support for transactions

[njibhu]

Description

The new UnifiedJedis class added with Jedis 4.0.0 is missing support for the watch and multi commands.
I also couldn't find a way to easily instantiate from the Transaction class directly from a UnifiedJedis instance.

Redis / Jedis Configuration

Jedis version: 4.1.1

Redis version: 6.x

Java version: 17

[sazzad16]

@njibhu Transaction makes sense on a strict single connection (like Jedis). UnifiedJedis would rarely be used on a single connection. So it's not feasible to add Transaction in UnifiedJedis.

You can use Transaction directly. We've also added watch and multi there.

[njibhu]

@sazzad16 Thanks for the explaination !
Since the single connection client Jedis doesn't support json commands but I need these, I don't have a choice but to use the UnifiedJedis class even though I have a single server.

What would actually be the recommended way to use directly Transaction ? Is there a way to get a single connection from a UnifiedJedis to pass to the Transaction constructor ? Or should I have a normal Jedis instance only to create Transactions and keep the UnifiedJedis for my other queries ?

[sazzad16]

@njibhu You can create a Connection and use that to create Jedis, UnifiedJedis, Transaction, etc.

try (Connection connection = new Connection(...)) {
  Jedis jedis = new Jedis(connection);
  UnifiedJedis ujedis = new UnifiedJedis(connection);
  Transaction transaction = new Transaction(connection);
}

PS: This is not something that I would confidently recommend for production.

[sazzad16]

Merged #3361