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https://issues.apache.org/jira/browse/NIFI-3724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15987734#comment-15987734
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ASF GitHub Bot commented on NIFI-3724:
--------------------------------------
GitHub user bbende opened a pull request:
https://github.com/apache/nifi/pull/1712
NIFI-3724 - Add Put/Fetch Parquet Processors
This PR adds a new nifi-parquet-bundle with PutParquet and FetchParquet
processors. These work similar to PutHDFS and FetchHDFS, but instead read and
write Records.
While working on this I needed to reuse portions of the record
reader/writer code, and thus refactored some of the project structure which
caused many files to move around.
Summary of changes:
- Created nifi-parquet-bundle
- Created nifi-commons/nifi-record to hold domain/API related to records
- Created nifi-nar-bundles/nifi-extension-utils as a place for utility code
specific to extensions
- Moved nifi-commons/nifi-processor-utils under nifi-extension-utils
- Moved nifi-commons/nifi-hadoop-utils under nifi-extension-utils
- Create nifi-extension-utils/nifi-record-utils for utility code related
records
To test the Parquet processors you can create a core-site.xml with a local
file system and read/write parquet to local directories:
```
<configuration>
<property>
<name>fs.defaultFS</name>
<value>file:///</value>
</property>
</configuration>
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/bbende/nifi parquet-bundle
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/1712.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 #1712
----
commit a35e5957f5ff8c47df5352b7b1a5ef494fed8633
Author: Bryan Bende <[email protected]>
Date: 2017-04-12T22:25:31Z
NIFI-3724 - Initial commit of Parquet bundle with PutParquet and
FetchParquet
- Creating nifi-records-utils to share utility code from record services
- Refactoring Parquet tests to use MockRecorderParser and MockRecordWriter
- Refactoring AbstractPutHDFSRecord to use schema access strategy
- Adding custom validate to AbstractPutHDFSRecord and adding handling of
UNION types when writing Records as Avro
- Refactoring project structure to get CS API references out of
nifi-commons, introducing nifi-extension-utils under nifi-nar-bundles
----
> Add Put/Fetch Parquet Processors
> --------------------------------
>
> Key: NIFI-3724
> URL: https://issues.apache.org/jira/browse/NIFI-3724
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Bryan Bende
> Assignee: Bryan Bende
> Priority: Minor
>
> Now that we have the record reader/writer services currently in master, it
> would be nice to have reader and writers for Parquet. Since Parquet's API is
> based on the Hadoop Path object, and not InputStreams/OutputStreams, we can't
> really implement direct conversions to and from Parquet in the middle of a
> flow, but we can we can perform the conversion by taking any record format
> and writing to a Path as Parquet, or reading Parquet from a Path and writing
> it out as another record format.
> We should add a PutParquet that uses a record reader and writes records to a
> Path as Parquet, and a FetchParquet that reads Parquet from a path and writes
> out records to a flow file using a record writer.
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