Multiple AddNCronJob only registers ones

[skarum]

Describe the bug
Prior to version 3.3.3 you could register multiple jobs by calling AddNCronJob multiple times.

If I had a setup like this:

services.AddNCronJob(
    builder => builder
        .AddJob<TestJob1>(o => o.WithCronExpression("0/1 * * * * *"))
);

services.AddNCronJob(
    builder => builder
        .AddJob<TestJob2>(o => o.WithCronExpression("0/1 * * * * *"))
);

Current behavior
Only TestJob1 is executed

Expected behavior
Both TestJob1 and TestJob2 should be executed

Version information

• NCronJobVersion: 3.3.3-5
• .NET runtime version: 8 and 9

I think the change from builder.RegisterJobs(); to services.TryAddSingleton(jobRegistry); in this commit is the cause of this behavior, but I'm not sure if it's intentional or a bug?

If this is intentional I think the second call to .AddNCronJob(... should throw an exception.

[linkdotnet]

Hey @skarum

No that is absolutely not intentional (at least until now :D) and should be fixed! Thanks for the report!

[skarum]

Ohh - can see I forgot to link to the commit: 0fe7e66#diff-997ac4e971e8a1108f07128317dfa5a16164555c9220704a45a2d7f26ff01eb0

[linkdotnet]

As a workaround, you can "just" have one call:

services.AddNCronJob(
    builder => builder
        .AddJob<TestJob1>(o => o.WithCronExpression("0/1 * * * * *"))
        .AddJob<TestJob2>(...)
);

[linkdotnet]

@nulltoken we might wanna change that in the future to remove ambiguity (and make our code simpler)

[skarum]

As a workaround, you can "just" have one call:

services.AddNCronJob(
    builder => builder
        .AddJob<TestJob1>(o => o.WithCronExpression("0/1 * * * * *"))
        .AddJob<TestJob2>(...)
);

Thanks, that could work.

Unfortunately I have decentralized my setup, where different parts of my code can just add stuff to the IOC container, including registering a job.

So, If you are going to fix it so it'll work in old way I'll just wait for the next release. If not I'll adjust my code. :-)

[linkdotnet]

I think I have a fix - which I will push as a preview in a few minutes

[linkdotnet]

A new 3.3.7-preview package will be available in a few minutes. Thanks for the report