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https://issues.apache.org/jira/browse/SOLR-14673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Pugh reassigned SOLR-14673:
--------------------------------
Assignee: Eric Pugh (was: Joel Bernstein)
> Add CLI for Streaming Expressions
> ---------------------------------
>
> Key: SOLR-14673
> URL: https://issues.apache.org/jira/browse/SOLR-14673
> Project: Solr
> Issue Type: New Feature
> Components: streaming expressions
> Reporter: Joel Bernstein
> Assignee: Eric Pugh
> Priority: Major
> Attachments: SOLR-14673.patch, SOLR-14673.patch, SOLR-14673.patch,
> SOLR-14673.patch, SOLR-14673.patch
>
>
> This ticket will provide a simple CLI that will run a Streaming Expression
> from the command line and return the results as a delimited result set. This
> will allow Streaming Expressions to be used from the command line to extract
> data as well as load data into Solr.
> Sample syntax:
> {code:java}
> bin/expr expr_file{code}
> This will run the expression in _expr_file_.
> Output will be to standard out as delimited records.
> *Standard-In, Standard-out and Pipe Composition.*
> The CLI can read from *standard-in* and write to *standard-out* in delimited
> records. This allows Streaming Expressions to be composed using unix pipes
> with other command line tools and other streaming expressions. Example syntax:
> {code:java}
> cat data.csv | ./bin/expr load.expr {code}
> The load.expr file uses the *stndin()* function to read from standard-in and
> load date to Solr. Here is a sample load.expr
> {code:java}
> let(cli-zkhost="localhost:9983",
>
> update(collection1,
> parseCSV(stndin()))
> {code}
> In the example above the *let* expression is used to set the *cli-zkhost* and
> then run the Streaming Expression:
> {code:java}
> update(collection1,
> parseCSV(stndin()){code}
> The *stndin* function reads the data from standard-in. The *parseCSV*
> function parses the lines into tuples and the *update* function sends the
> data to collection1 for indexing.
>
> *Querying Solr and Pipe Composition*
> The CLI can also be used to query Solr and pipe the result to other
> applications on the command line. This can automate activities like alerting,
> data backup, replication etc...
>
>
>
>
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