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https://issues.apache.org/jira/browse/NIFI-1280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15962814#comment-15962814
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ASF GitHub Bot commented on NIFI-1280:
--------------------------------------
Github user markap14 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1652#discussion_r110647631
--- Diff:
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/StandardProcessSession.java
---
@@ -2201,7 +2202,10 @@ public int read(final byte[] b, final int off, final
int len) throws IOException
@Override
public void close() throws IOException {
- StandardProcessSession.this.bytesRead +=
countingStream.getBytesRead();
+ if (!closed) {
+ StandardProcessSession.this.bytesRead +=
countingStream.getBytesRead();
+ closed = true;
+ }
--- End diff --
Agreed, it is not thread-safe. But ProcessSession is not intended to be
thread-safe :)
> Create QueryFlowFile Processor
> ------------------------------
>
> Key: NIFI-1280
> URL: https://issues.apache.org/jira/browse/NIFI-1280
> Project: Apache NiFi
> Issue Type: Task
> Components: Extensions
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 1.2.0
>
> Attachments: QueryFlowFile_Record_Reader-Writer_Examples.xml
>
>
> We should have a Processor that allows users to easily filter out specific
> columns from CSV data. For instance, a user would configure two different
> properties: "Columns of Interest" (a comma-separated list of column indexes)
> and "Filtering Strategy" (Keep Only These Columns, Remove Only These Columns).
> We can do this today with ReplaceText, but it is far more difficult than it
> would be with this Processor, as the user has to use Regular Expressions,
> etc. with ReplaceText.
> Eventually a Custom UI could even be built that allows a user to upload a
> Sample CSV and choose which columns from there, similar to the way that Excel
> works when importing CSV by dragging and selecting the desired columns? That
> would certainly be a larger undertaking and would not need to be done for an
> initial implementation.
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