@NestedLRA instead of @LRA?

[nmcl]

@NestedLRA instead of @LRA?

[rdebusscher]

With the @NestedLRA you can implement a specific scenario which is not possible when using only @lra(type=Type.NEW)

This is the current spec document (see https://github.com/eclipse/microprofile-lra/blob/master/spec/src/main/asciidoc/microprofile-lra-spec.adoc)

• If the nested LRA is closed but the outer LRA is cancelled then the
  participants registered with the nested LRA will be told to compensate.
• If the nested LRA is cancelled the outer LRA can be still closed.

So a NestedLRA is not completely independent from the 'parent' LRA in which it runs. If the parent is cancelled, the compensate actions for the NestedLRA are also called. But the NestedLRA can be cancelled although the 'parent' LRA can just be successfully closed.

When you try to implement it using only the @LRA, there is no possibility to the achieve the above scenario.

Also what happens if an LRA isn't active when @NestedLRA is called?

An exception should be thrown indicating this wrong usage status. But is isn't specified in the spec at the moment.
I have opened eclipse/microprofile-lra#117

[mmusgrov]

How about adding the NESTED option to the Type attributed of the @LRA annotation, ie

NESTED, REQUIRED, REQUIRES_NEW, MANDATORY, SUPPORTS, NOT_SUPPORTED, NEVER

[kenfinnigan]

Wondering if this issue should be moved to https://github.com/eclipse/microprofile-lra and the LRA code removed from the sandbox?

[mmusgrov]

+1 I'll do that as soon as @nmcl and the team have resolved this current question

[mmusgrov]

@nmcl we have created issue #117 for this in the microprofile-lra repo. Do you mind if we close this one in preparation for removing LRA from the sandbox.

[mmusgrov]

Moved to eclipse/microprofile-lra#117