Francesco Chicchiriccò created SYNCOPE-855:
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Summary: Synchronization token management enhancement in case of
errors
Key: SYNCOPE-855
URL: https://issues.apache.org/jira/browse/SYNCOPE-855
Project: Syncope
Issue Type: Improvement
Components: core
Affects Versions: 2.0.0-M2, 1.2.7
Reporter: Francesco Chicchiriccò
Fix For: 1.2.8, 2.0.0
The overall logic of the synchronization (1.2) / incremental pull (2.0) process
can be summarized as:
# invoke underlying connector's {{getLatestSyncToken}}
# invoke underlying connector's {{sync}}
# store the value for {{getLatestSyncToken}} for subsequent invocation
As a consequence, when one synchronizing item ({{SyncDelta}}) generates an
error, the whole process might be interrupted without saving the updated sync
token, and next invocation will start again from the beginning, without
considering the successful items passed before the error occurred.
The process should be changed as follows, instead:
# invoke underlying connector's {{getLatestSyncToken}}
# invoke underlying connector's {{sync}}: for each {{SyncDelta}}, temporary
store the related {{syncToken}} field;
# store the last successful item's {{syncToken}} value - or
{{getLatestSyncToken}} if no error occurred - for subsequent invocation
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