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https://issues.apache.org/jira/browse/NIFI-8514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Wise updated NIFI-8514:
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Description:
We'd like to be able to feed a list of values to DistributeLoad and use EL to
establish the "Number of Relationships" value from the count of those list
values. That would allow us to define a list of URL, hostnames, etc. in a
preceding attribute, which DistributeLoad could then enumerate on its own, to
dynamically establish the number of relationships.
For instance, when provided a list of URLs in an attribute named {{urlList}},
DistributeLoad could then determine the relationship count with
{{${allDelineatedValues(${urlList}, ","):count()}}}. A subsequent
UpdateAttribute processor could then extract the appropriate URL from
${urlList} with getDelimitedField, based on the relationship number provided by
DistributeLoad.
was:
We'd like to be able to feed a list of values to DistributeLoad and use EL to
establish the "Number of Relationships" value from the count of list values.
That would allow us to define a list of URL, hostnames, etc. in a preceding
attribute, which DistributeLoad could then enumerate on its own, to dynamically
establish the number of relationships.
For instance, when provided a list of URLs in an attribute named {{urlList}},
DistributeLoad could then determine the relationship count with
{{${allDelineatedValues:(${urlList}, ","):count()}}}. A subsequent
UpdateAttribute processor could then extract the appropriate URL from the
${urlList} with getDelimitedField, based on the number provided by
DistributeLoad.
> Add EL support to DistributeLoad
> --------------------------------
>
> Key: NIFI-8514
> URL: https://issues.apache.org/jira/browse/NIFI-8514
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core UI
> Reporter: John Wise
> Priority: Minor
>
> We'd like to be able to feed a list of values to DistributeLoad and use EL to
> establish the "Number of Relationships" value from the count of those list
> values. That would allow us to define a list of URL, hostnames, etc. in a
> preceding attribute, which DistributeLoad could then enumerate on its own, to
> dynamically establish the number of relationships.
> For instance, when provided a list of URLs in an attribute named {{urlList}},
> DistributeLoad could then determine the relationship count with
> {{${allDelineatedValues(${urlList}, ","):count()}}}. A subsequent
> UpdateAttribute processor could then extract the appropriate URL from
> ${urlList} with getDelimitedField, based on the relationship number provided
> by DistributeLoad.
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