Latest revision as of 06:30, 9 April 2015

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 "webCollection".

Configure new solr index

To configure your own search index "webCollection" copy the collection1 configuration folder (see SMILA/configuration/org.eclipse.smila.solr/solr_home) with the name webCollection, in the same directory, delete date folder and adapt core.properties file.

Afterwards add your new core to the file SMILA.application/configuration/org.eclipse.smila.solr/solr-config.json:

{
    "mode":"embedded",
    "idFields":{
        "collection1":"_recordid",
        "webCollection":"_recordid"
    },
    ...
}

Further information:: For more information about the Solr indexing, please see the SMILA Solr 4.x 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 index name "indexname" in there from "collection1" to "webCollection":

   ...
   var solrIndexPipelet = pipelets.create("org.eclipse.smila.solr.update.SolrUpdatePipelet", {
      "indexname" : "webCollection",
      ...

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": "addWeb",
      "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",
    "jobToPushTo":"indexWebJob",
    "startUrl":"http://wiki.eclipse.org/SMILA",
    "linksPerBulk": 100,
    "filters":{
      "urlPatterns": {
         "include": ["http://wiki\\.eclipse\\.org/SMILA.*",
            "http://wiki\\.eclipse\\.org/Image:.*",
            "http://wiki\\.eclipse\\.org/images/.*"],
         "exclude": [".*\\?.*",
            "http://wiki\\.eclipse\\.org/images/archive/.*",
            ".*\\.java"]
      }
    },
    "mapping": {
      "httpCharset": "Charset",
      "httpContenttype": "ContentType",
      "httpLastModified": "LastModifiedDate",
      "httpMimetype": "MimeType",
      "httpSize": "Size",
      "httpUrl": "Url",
      "httpContent": "Content"
    }
  }
}

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 webCollection.

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 webCollection 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
• REST API: http://localhost:8080/smila/jobmanager

Scripting

• configuration folder: org.eclipse.smila.processing.scripts
  • js/ (Predefined JavaScript scripts)
• Documentation
  • Scripting
  • ScriptProcessorWorker

• REST API: http://localhost:8080/smila/script

Solr

• DataDictionary
  • configuration folder: org.eclipse.smila.solr
• Documentation
  • SMILA/Documentation/Solr_4.x