Ashutosh Mestry created ATLAS-3663:
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Summary: Import Service: Migration Import: Provide Ability to
Resume from Last Successfully Imported State
Key: ATLAS-3663
URL: https://issues.apache.org/jira/browse/ATLAS-3663
Project: Atlas
Issue Type: Improvement
Components: atlas-core
Affects Versions: trunk
Reporter: Ashutosh Mestry
Assignee: Ashutosh Mestry
Fix For: trunk
*Background*
The new Migration Import implementation allows for importing large zip files.
These imports can potentially run for long time. If the server shuts down while
an import is in progress, there needs to be a mechanism so that the import
resumes from the last imported entity.
*Solution*
* Implement _DataMigrationStatusService_ this will maintain a special vertex
one of whose property will be the last successfully imported status.
* Update this vertex on each successfully recorded import.
* At the start of _ZipFileBaseMigration_ check for existence of this vertex.
If it exists and has a valid position, use this to set the _startPosition_ in
the _AtlasImportRequest_.
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