DataImportHandler: Add close hooks to the completion of a full-import process
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Key: SOLR-938
URL: https://issues.apache.org/jira/browse/SOLR-938
Project: Solr
Issue Type: New Feature
Environment: JRE 6, Tomcat 6
Reporter: Kay Kay
Adding a new feature that we need for continuation of a workflow based on a
full-import procedure. When a full-import completes , the pre-defined hook
method is called at the end of the same.
Implementations that need to notified , need to implement the new interface -
DataImportCloseHook and register themselves in the data config file as follows.
<dataConfig>
.
.
.
.
<closeHook type="com.myorg.fullimporter.closeHookImpl1" />
<closeHook type="com.myorg.fullimporter.closeHookImpl2" />
</dataConfig>
A single instance of them is created (as part of DataImporter) during
instantiation and the same insance is reused across multiple invocations.
Since the dataImporter is protected by a thread-lock - there is no thred-safe
guarantee for the implementations of the full-import close hook.
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