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https://issues.apache.org/jira/browse/GRIFFIN-213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702828#comment-16702828
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ASF GitHub Bot commented on GRIFFIN-213:
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Github user asfgit closed the pull request at:
https://github.com/apache/incubator-griffin/pull/456
> Support pluggable datasource connectors
> ---------------------------------------
>
> Key: GRIFFIN-213
> URL: https://issues.apache.org/jira/browse/GRIFFIN-213
> Project: Griffin (Incubating)
> Issue Type: Improvement
> Reporter: Nikolay Sokolov
> Priority: Minor
> Fix For: 0.3.1-incubating
>
>
> As of Griffin 0.3, code modification is required, in order to add new data
> connectors.
> Proposal is to add new data connector type, CUSTOM, that would allow to
> specify class name of data connector implementation to use. Additional jars
> with custom connector implementations would be provided in spark
> configuration template.
> Class name would be specified in "class" config of data connector. For
> example:
> {code:json}
> "connectors": [
> {
> "type": "CUSTOM",
> "config": {
> "class": "org.example.griffin.JDBCConnector"
> // extra connector-specific parameters
> }
> }
> ]
> {code}
> Proposed contract for implementations is based on current convention:
> - for batch
> ** class should be a subclass of BatchDataConnector
> ** if should have method with signature:
> {code:java}
> public static BatchDataConnector apply(ctx: BatchDataConnectorContext)
> {code}
> - for streaming
> ** class should be a subclass of StreamingDataConnector
> ** it should have method with signature:
> {code:java}
> public static StreamingDataConnector apply(ctx: StreamingDataConnectorContext)
> {code}
> Signatures of context objects:
> {code:scala}
> case class BatchDataConnectorContext(@transient sparkSession: SparkSession,
> dcParam: DataConnectorParam,
> timestampStorage: TimestampStorage)
> case class StreamingDataConnectorContext(@transient sparkSession:
> SparkSession,
> @transient ssc: StreamingContext,
> dcParam: DataConnectorParam,
> timestampStorage: TimestampStorage,
> streamingCacheClientOpt:
> Option[StreamingCacheClient])
> {code}
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