Dispatch a MigrateRowFailEvent when a row fails

New patch for 11.x

Thanks for continuing this issue.

Seems to have been tagged for tests and a CR which are still needed.

Thanks!

Akhil Babu → made their first commit to this issue’s fork.

Moved patch #7 to Github. I've also tried to create a test for validating the migration row fail event.
MigrateEventsTest::testMigrateEvents() already uses a simple migration to test existing events

    $definition = [
      'migration_tags' => ['Event test'],
      'source' => [
        'plugin' => 'embedded_data',
        'data_rows' => [
          ['data' => 'dummy value'],
        ],
        'ids' => [
          'data' => ['type' => 'string'],
        ],
      ],
      'process' => ['value' => 'data'],
      'destination' => ['plugin' => 'dummy'],
    ];

But I was not able to trigger a 'failed row' with this migration. Instead, I created a new simple node migration. I'm not sure if that's the correct approach or not.

For review

Left some feedback and for the CR.

Addressed the above feedback and rebased MR. Thanks!

Thanks @ankithashetty,@smustgrave
Review comments addressed. Moving back to needs review

NW for the change record.

Thank you for providing a patch for this, it works well for me!