Handle concurrency while initializing activity

Based on backend!1353
Closes #68 (closed)
This would allow to run processes on a similar worker version and element without processing the element twice (that can cause side effects or other errors).
The backend can return a 409_CONFLICT.

• Add tests

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changed the description

changed the description

added 4 commits

• 66fa30c6 - Handle backend 409 conflict error code
• 54688447 - Avoid updating activity to error when we could not fetch the element
• 97fee783 - Update existing tests
• 444dd52c - Add tests related to activities update

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marked the checklist item Add tests as completed

marked this merge request as ready

added 16 commits

• 444dd52c...6b9540d0 - 11 commits from branch master
• d1992513 - Handle concurrency while initializing activity
• ef3a9565 - Handle backend 409 conflict error code
• 9b2c2752 - Avoid updating activity to error when we could not fetch the element
• 1d13088e - Update existing tests
• 8f1d1f08 - Add tests related to activities update

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added 1 commit

• ea67083c - Suggestions

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resolved all threads

added 10 commits

• 7e22020e - 1 commit from branch master
• 28041ed0 - Handle concurrency while initializing activity
• d69940d2 - Handle backend 409 conflict error code
• 00e45a11 - Avoid updating activity to error when we could not fetch the element
• bd5d15ae - Update existing tests
• 1eb191bf - Add tests related to activities update
• 3de131d9 - Suggestions
• 25d4fff2 - Use a custom conflict Exception
• 528bc322 - Use the generic error catch and handle exceptions when patching to the Error state
• 075ebabe - Update tests

Compare with previous version

resolved all threads

resolved all threads

added 21 commits

• 075ebabe...6b7ba8d8 - 12 commits from branch master
• 9a233d00 - Handle concurrency while initializing activity
• 74e2c4c4 - Handle backend 409 conflict error code
• 0b7bf018 - Avoid updating activity to error when we could not fetch the element
• a5dd540b - Update existing tests
• b3c8d22b - Add tests related to activities update
• a73202eb - Suggestions
• cbde9d25 - Use a custom conflict Exception
• c8326a0e - Use the generic error catch and handle exceptions when patching to the Error state
• 24766547 - Update tests

Compare with previous version

mentioned in issue #78 (closed)

added 3 commits

• 18835268 - Suggestion
• ef486b29 - Fix tests
• 1e63c46e - Simplify behavior to avoid confusion

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resolved all threads

added 2 commits

• 3367377c - Fix tests
• 26f4bd8f - Simplify behavior to avoid confusion

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added 1 commit

• 42c66c66 - Simplify behavior to avoid confusion

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Tested locally last version, works

merged