Bala's Blog

JOY OF PROGRAMMING

Month: October, 2011

Customized Stemming Dictionary in solr Porter stemmer

The simple way to use a lot of custom stemming words in solr we can implement the StemmerOverrideFilterFactory and the schema of the field using that will look like the following
< filter class="solr.StemmerOverrideFilterFactory" dictionary="stemdict.txt" />
< filter class="solr.PorterStemFilterFactory" />

The dictionary stemdict.txt must look like
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#———————————————————————–
# test that we can override the stemming algorithm with our own mappings
# these must be tab-separated
monkeys monkey
otters otter
# some crazy ones that a stemmer would never do
dogs cat

Note:while giving the stem substitute words it must be separated by a tab space

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Embedded Solr Server using Java

Hi

The Solr server can be used without using the http by using the Embedded Solr server.In this we use the java api to

connect to the solr server.The program for the Embedded Solr is as follows

System.setProperty(“solr.solr.home”, “/home/user1/apache-solr-3.4.0/example/solr”);
CoreContainer.Initializer initializer = new CoreContainer.Initializer();
CoreContainer coreContainer = initializer.initialize();
EmbeddedSolrServer server = new EmbeddedSolrServer(coreContainer, “”);
SolrQuery solrQuery = new  SolrQuery();
solrQuery.setParam(“fl”,”id,score”);
solrQuery.setParam(“q”,string);
solrQuery.setQuery(“id:bala”);
QueryResponse rsp = server.query(solrQuery);
SolrDocumentList docs = rsp.getResults();
System.out.println(docs);

 

By using this we can actually search the indexed document in the Solr which is in a single core.
The set param is used to pass the query string as the parameter and get the required results
based on it.

 

thanks

bala