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ASF GitHub Bot commented on NIFI-4004: -------------------------------------- GitHub user ijokarumawak opened a pull request: https://github.com/apache/nifi/pull/1877 NIFI-4004: Use RecordReaderFactory without FlowFile. - Added RecordReaderFactory.createReader without FlowFile. - Added validation mechanism to reject RecordReaderFactory which requires FlowFile, from a processor which does not have incoming FlowFile. - Removed creation of temporal FlowFile to resolve Record Schema from ConsumerLease. - Renamed variable 'alloableValue' to 'strategy' to represent its meaning better. Thank you for submitting a contribution to Apache NiFi. In order to streamline the review of the contribution we ask you to ensure the following steps have been taken: ### For all changes: - [x] Is there a JIRA ticket associated with this PR? Is it referenced in the commit message? - [x] Does your PR title start with NIFI-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character. - [x] Has your PR been rebased against the latest commit within the target branch (typically master)? - [x] Is your initial contribution a single, squashed commit? ### For code changes: - [x] Have you ensured that the full suite of tests is executed via mvn -Pcontrib-check clean install at the root nifi folder? - [ ] Have you written or updated unit tests to verify your changes? - [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)? - [ ] If applicable, have you updated the LICENSE file, including the main LICENSE file under nifi-assembly? - [ ] If applicable, have you updated the NOTICE file, including the main NOTICE file found under nifi-assembly? - [ ] If adding new Properties, have you added .displayName in addition to .name (programmatic access) for each of the new properties? ### For documentation related changes: - [ ] Have you ensured that format looks appropriate for the output in which it is rendered? ### Note: Please ensure that once the PR is submitted, you check travis-ci for build issues and submit an update to your PR as soon as possible. You can merge this pull request into a Git repository by running: $ git pull https://github.com/ijokarumawak/nifi nifi-4004 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/nifi/pull/1877.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #1877 ---- commit 2c3cf2d36b310777043ae305aec907acb6240cbe Author: Koji Kawamura <ijokaruma...@apache.org> Date: 2017-06-01T12:50:17Z NIFI-4004: Use RecordReaderFactory without FlowFile. - Added RecordReaderFactory.createReader without FlowFile. - Added validation mechanism to reject RecordReaderFactory which requires FlowFile, from a processor which does not have incoming FlowFile. - Removed creation of temporal FlowFile to resolve Record Schema from ConsumerLease. - Renamed variable 'alloableValue' to 'strategy' to represent its meaning better. ---- > Refactor RecordReaderFactory and SchemaAccessStrategy to be used without > incoming FlowFile > ------------------------------------------------------------------------------------------ > > Key: NIFI-4004 > URL: https://issues.apache.org/jira/browse/NIFI-4004 > Project: Apache NiFi > Issue Type: Improvement > Components: Extensions > Affects Versions: 1.2.0 > Reporter: Koji Kawamura > > Current RecordReaderFactory and SchemaAccessStrategy implementation assumes > there's always an incoming FlowFile available, and use it to resolve Record > Schema. > That is fine for components those convert or update incoming FlowFiles, > however there are other components those does not have any incoming > FlowFiles, for example, ConsumeKafkaRecord_0_10. Typically, ones fetches data > from external system do not have incoming FlowFile. And current API doesn't > fit well with these as it requires a FlowFile. > In fact, [ConsumeKafkaRecord creates a temporal > FlowFile|https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-0-10-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumerLease.java#L426] > only to get RecordSchema. This should be avoided as we expect more > components start using Record reader mechanism. > This JIRA proposes refactoring current API to allow accessing RecordReaders > without needing an incoming FlowFile. > Additionally, since there's Schema Access Strategy that requires incoming > FlowFile containing attribute values to access schema registry, it'd be > useful if we could tell user when such RecordReader is specified that it > can't be used. -- This message was sent by Atlassian JIRA (v6.3.15#6346)