Apache Solr Reference Guide Covering Apache Solr 6.0

pSolrClient , or CloudSolrClient . Both communicate with Solr via HTTP, the difference is that HttpSolr
Client is configured using an explicit Solr URL, while CloudSolrClient is configured using the zkHost String
for a SolrCloud cluster.
Single node Solr client
String urlString = "http://localhost:8983/solr/techproducts";
SolrClient solr = new HttpSolrClient(urlString);
SolrCloud client
String zkHostString = "zkServerA:2181,zkServerB:2181,zkServerC:2181/solr";
SolrClient solr = new CloudSolrClient(zkHostString);
Once you have a SolrClient, you can use it by calling methods like query() , add() , and commit() .
Building and Running SolrJ Applications
The SolrJ API is included with Solr, so you do not have to download or install anything else. However, in order to
build and run applications that use SolrJ, you have to add some libraries to the classpath.
At build time, the examples presented with this section require solr-solrj-x.y.z.jar to be in the classpath.
At run time, the examples in this section require the libraries found in the 'dist/solrj-lib' directory.
The Ant script bundled with this sections' examples includes the libraries as appropriate when building and
running.
You can sidestep a lot of the messing around with the JAR files by using Maven instead of Ant. All you will need
to do to include SolrJ in your application is to put the following dependency in the project's pom.xml:
org.apache.solr
solr-solrj
x.y.z
If you are worried about the SolrJ libraries expanding the size of your client application, you can use a code
obfuscator like ProGuard to remove APIs that you are not using.
Setting XMLResponseParser
SolrJ uses a binary format, rather than XML, as its default response format. If you are trying to mix Solr and SolrJ
versions where one is version 1.x and the other is 3.x or later, then you MUST use the XML response parser.
The binary format changed in 3.x, and the two javabin versions are entirely incompatible. The following code will
make this change:
server.setParser(new XMLResponseParser());
Performing Queries
Use query() to have Solr search for results. You have to pass a SolrQuery object that describes the query,
Apache Solr Reference Guide 6.0
643