Add activity interface support#559

Draft

meiliang86 wants to merge 10 commits intocadence-workflow:masterfrom

meiliang86:activity-interface

Commits on Oct 24, 2020

Cleanup retryer and retry options
Liang Mei
committed
Remove unused retry options from worker options
Liang Mei
committed
Fix license
Liang Mei
committed

Commits on Oct 28, 2020

Review comments
Liang Mei
committed
Added ActivityInterface. Removed timeout properties from ActivityMethod

mfateev
authored and
Liang Mei
committed
Added @ActivityInterface implementation to POJOActivityTaskHandler

mfateev
authored and
Liang Mei
committed
Added ActivityInterface hierarchy test

mfateev
authored and
Liang Mei
committed
Added support for calling polymorphic activities

mfateev
authored and
Liang Mei
committed
Added JavaDoc of ActivityInterface

mfateev
authored and
Liang Mei
committed

Commits on Oct 29, 2020

Add ActivityMethod fields back for backward compatibility
Liang Mei
committed