Revision as of 07:16, 29 October 2014

Just another 5 minutes to change the workflow

In the 5 minutes tutorial all data collected by crawlers was processed with the same asynchronous "indexUpdate" workflow using the script "add.js". All data was indexed into the same solr/lucene index "DefaultCore". It is possible however, to configure SMILA so that data from different data sources will go through different workflows and pipelines and will be indexed into different indices. This will require more advanced configuration features than before but still quite simple ones.

In the following sections we are going to use the generic asynchronous "indexWithScript" workflow which let you specify the JavaScript script to process the data. We create an additional script for webcrawler records so that webcrawler data will be indexed into a separate search index named "WebCore".

Configure new solr index

To configure your own search index "WebCore" follow the description in the SMILA documentation for creating your own solr index.

If you had already started SMILA before (as we suppose you did), please copy your new Core configuration and the modified solr.xml file to the folder workspace\.metadata\.plugins\org.eclipse.smila.solr because the configuration will not be copied again, after the first start of the Solr bundle.

Further information:: For more information about the Solr indexing, please see the SMILA Solr documentation.

Create a new indexing script

We need to add a new script for adding the imported webcrawler records. Predefined scripts are contained in the configuration/org.eclipse.smila.scripting/js directory. We can add new scripts by just adding them there.

Copy the script "add.js", name the copy "addWeb.js" and change the solr "CoreName" in there from "DefaultCore" to "WebCore":

   ...
   var solrIndexPipelet = pipelets.create("org.eclipse.smila.solr.index.SolrIndexPipelet", {
      "ExecutionMode" : "ADD",
      "CoreName" : "WebCore",
   ...

Further information: For more information about Scripting please check the Scripting documentation.

Create and start a new indexing job

We define a new indexing job based on the predefined asynchronous workflow "indexWithScript" (see SMILA/configuration/org.eclipse.smila.jobmanager/workflows.json). This indexing job will process the imported data by using our new script "addWeb.js".

The "indexWithScript" workflow contains a ScriptProcessorWorker worker which is not configured for a dedicated script, so the scripts handling adds and deletes have to be set via job parameter.

Use your favourite REST Client to create an appropriate job definition:

POST http://localhost:8080/smila/jobmanager/jobs/
  {
    "name":"indexWebJob",
    "parameters":{      
      "tempStore": "temp",
      "addScript": "add",
      "deleteScript": "delete" 
     },
    "workflow":"indexWithScript"
  }

Notes:

• the "deleteScript" is not needed for our test scenario here, but we must fulfill all undefined workflow parameters.
• in the add and the delete script we use the standard function ("process"), so we don't have to set/change this via parameter.

Afterwards, start a job run for the defined job:

POST http://localhost:8080/smila/jobmanager/jobs/indexWebJob

Create a new web crawl job

Since the predefined web crawl job pushes the crawled records to the indexUpdate job, we create a new job here using our new indexing job.

POST http://localhost:8080/smila/jobmanager/jobs/
{
  "name":"crawlWikiToWebCore",
  "workflow":"webCrawling",
  "parameters":{
    "tempStore":"temp",
    "dataSource":"web",
    "startUrl":"http://wiki.eclipse.org/SMILA",
    "filter":{
      "urlPrefix":"http://wiki.eclipse.org/SMILA"
    },
    "jobToPushTo":"indexWebJob"
  }
}

Please note that we used the following line to let the crawl job push the records to our new indexing job:

"jobToPushTo":"indexWebJob"

Now start the crawl job:

POST http://localhost:8080/smila/jobmanager/jobs/crawlWikiToWebCore

After some time to crawl, process and commit the data, you can have another look at the SMILA search page to find your new core listed among the available cores, and if you choose it, you can search for e.g. "SMILA" in the new WebCore.

Put it all together

Ok, now it seems that we have finally finished configuring SMILA for using separate scripts for file system and web crawling and index data from these crawlers into different indices. Here is what we have done so far:

1. We added the WebCore index to the Solr configuration.
2. We created a new JavaScript script for Web crawler data referencing the new Solr index.
3. We used a separate job for web indexing that references the new script.
4. We used a separate web crawl job to push the records to the new indexing job.

Configuration overview

SMILA configuration files are located in the configuration directory of the SMILA application. The following lists the configuration files and documentation links relevant to this tutorial, regarding SMILA components:

Jobmanager

• configuration folder: org.eclipse.smila.jobmanager
  • workflows.json (Predefined asynchronous workflows)
  • jobs.json (Predefined jobs)
• Documentation
  • JobManager
  • PipelineProcessorWorker
• REST API: http://localhost:8080/smila/jobmanager

Scripts

• configuration folder: org.eclipse.smila.processing.scripts
  • js/ (Predefined JavaScript scripts)
• Documentation
  • Scripting
• REST API: http://localhost:8080/smila/script

Solr

• DataDictionary
  • configuration folder: org.eclipse.smila.solr
• Documentation
  • SMILA/Documentation/Solr