DZone
Big Data Zone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
  • Refcardz
  • Trend Reports
  • Webinars
  • Zones
  • |
    • Agile
    • AI
    • Big Data
    • Cloud
    • Database
    • DevOps
    • Integration
    • IoT
    • Java
    • Microservices
    • Open Source
    • Performance
    • Security
    • Web Dev
DZone > Big Data Zone > SOLR With Scala: Basic Introduction to Embedded SOLR

SOLR With Scala: Basic Introduction to Embedded SOLR

If you want to test methods that are creating connections with a remote Solr server, then Embedded Solr is the way to go.

Anurag Srivastava user avatar by
Anurag Srivastava
·
Apr. 11, 17 · Big Data Zone · Tutorial
Like (2)
Save
Tweet
4.57K Views

Join the DZone community and get the full member experience.

Join For Free

As we discussed in our previous article about Solr with Scala and AkkaHttp, we have used Solr as a service and tried to hit the Solr service with AkkaHttp and spray routes. 

When we want to test methods that are creating connections with a remote Solr server, we have to use Embedded Solr.

What Is Embedded Solr?

Embedded Solr has the same interface as Solr without requiring an HTTP connection. When we “embed” Solr into a Java an application, it provides the exact same API that you would use if you were connecting to a remote Solr instance. We can use embedded Solr for in-memory testing because when we implement test cases, it should not depend on any external resources.

How to Use Embedded Solr

When we wish to use Embedded Solr, we have to follow some basic steps for creating an interface with it.

  1. Add the Solr-Core dependency.
  2. Follow this predefined directory structure:
    solr
      |-test_embedded //name of configuration folder
             |-conf
                 |-lang
                 |-currency.xml
                 |-elevate.xml         
                 |-managed-schema
                 |-param-.json
                 |-protword.txt
                 |-solrconfig.xml
                 |-stopwords.txt
                 |-synonyms.txt
             |-data (Optional if not created than it will create automatically)
             |-core.properties
      |-solr.xml
  3. Now, we are ready to start Embedded Solr in the test set-up. It will shut down it after completes testing.
    override def before() = {
     val container = new CoreContainer()
     container.load()
     server = new EmbeddedSolrServer(container, "test_embedded")
    }
    
    test("test embedded solr"){
      val solrInputDocument = new SolrInputDocument()
      solrInputDocument.addField("id", 1)
      solrInputDocument.addField("name", "test")
      server.add("test_embedded",solrInputDocument)
    
      val parameter = new SolrQuery()
      parameter.set("q", "*:*")
      val result = server.query("test_embedded",parameter)
      val docList = result.getResults()
      val doc = docList.get(0)
      assert(doc.getFirstValue("name").toString().toLowerCase().contains("test"));
    }
    
    override def afterAll(): Unit = {
     server.close
    }

This is a basic code example for testing Embedded Solr. If test case passes successfully, we are ready to test the services. For more examples and code, please refer to the Knoldus GitHub page.

Scala (programming language)

Published at DZone with permission of Anurag Srivastava, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

Popular on DZone

  • Low Code and No Code: The Security Challenge
  • Open Source Monitoring and Metrics Landscape
  • Chopping the Monolith: The Demo
  • No Code Expectations vs Reality

Comments

Big Data Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • MVB Program
  • Become a Contributor
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 600 Park Offices Drive
  • Suite 300
  • Durham, NC 27709
  • support@dzone.com
  • +1 (919) 678-0300

Let's be friends:

DZone.com is powered by 

AnswerHub logo