[FLINK-15129] Return JobClient instead of JobClient Future from executeAsync()

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.10.0
• Component/s: API / DataSet, API / DataStream
• Assignee: Aljoscha Krettek
• Reporter: Aljoscha Krettek
• Created: 08/Dec/19 08:43
• Updated: 10/Dec/19 08:07
• Resolved: 10/Dec/19 08:07

Description

Currently, users have to write this when they want to use the JobClient:

CompletableFuture<JobClient> jobClientFuture = env.executeAsync();
JobClient jobClient = jobClientFuture.get();
// or use thenApply/thenCompose etc.

instead we could always return a JobClient right away and therefore remove one step for the user.

I don't know if it's always the right choice, but currently we always return an already completed future that contains the JobClient. In the future we might want to return a future that actually completes at some later point, we would not be able to do this if we directly return a JobClient and would have to block in executeAsync().