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https://issues.apache.org/jira/browse/APEXMALHAR-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15311616#comment-15311616
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ASF GitHub Bot commented on APEXMALHAR-2106:
--------------------------------------------
Github user tweise commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/307#discussion_r65476537
--- Diff:
library/src/main/java/com/datatorrent/lib/stream/StreamMerger.java ---
@@ -41,35 +47,57 @@
@Stateless
public class StreamMerger<K> extends BaseOperator
{
- /**
- * Data input port 1.
- */
- public final transient DefaultInputPort<K> data1 = new
DefaultInputPort<K>()
+ private int portCount = 0;
+ private final transient ArrayList<DefaultInputPort<K>> ports = new
ArrayList<>(portCount);
--- End diff --
No, there isn't. But it is possible to chain multiple mergers with 2 ports
and accomplish the same.
> Support merging multiple streams with StreamMerger
> ---------------------------------------------------
>
> Key: APEXMALHAR-2106
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2106
> Project: Apache Apex Malhar
> Issue Type: New Feature
> Reporter: Ilya Ganelin
> Assignee: Ilya Ganelin
>
> To properly implement the Flatten transformation (and other Stream
> combination operations), Apex must support merging data from multiple
> sources. The StreamMerger operator can be improved to merge multiple streams,
> rather than just the two streams it can handle in the present implementation.
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