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This brings up username and password fields and a login button. (Unless already logged in, eg into the manager or main GUI - in which case skip to the next section).
Note that:
- The plugin manager shares its cookie with the main GUI, the file uploader, the source builder, and the person manager - logging into any of them will log into all of them.
Scheduling a new Map Reduce Plugin
The above figure shows the tool shortly after log-in.
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The "query" field has a few noteworthy points:
- Some additional control fields can be supplied, as described here.
- The most common control fields can be specifically added with their default value by pressing the "Add Options" button
- The aforementioned query must be a MongoDB query (use the /wiki/spaces/INF/pages/3899780, or content format), Infinit.e queries are not currently supported (this functionality is coming).
- Press the "Check" button next to the "Query" field to validate the query JSON.
Note: If you set append results to false, there is no need to set an age out.
Note: If you don't want your job to depend on another jobs completion, do not select any job depenencies (you can CTRL-click to remove selected options if necessary).
Note: the "user arguments" field can be any string, it is interpreted by the code in the Hadoop JAR. For custom plugin developers: see this tutorial for a description of how to incorporate user arguments in the code (under advanced topics). Since the user arguments will normally be JSON or javascript (see info box below), a "Check" button has been provided that will validate either of those 2 formats.
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In particular, the built-in "HadoopJavascriptTemplate" template job uses the "user arguments" to hold the javascript code that gets executed in Hadoop. |
Note: You can temporarily remove a combiner or reducer by putting "#" in front of it. Only the mapper is mandatory (others can be set to "none"), though normally at least the mapper and reducer are set.
Submit vs Quickrun
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Debugging new and existing tasks
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Once a file has been chosen, it can be modified by changing the fields (and/or choosing a different file), and then selecting the "Submit" button.
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Related Reference Documentation: |
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Related Developer Documentation: |