Hello,
I'm pretty new to Solr, and not a Java expert, and trying to create my own
plug in according to the instructions given in
http://wiki.apache.org/solr/SolrPlugins. I want to integrate an external
stemmer for the Dutch language by creating a new FilterFactory that will
invoke the external stemmer for a TokenStream.
First thing I want to do is just make sure I can get the plug in running.
Here's what I did:
- Take a copy of DutchStemFilterFactory.java, rename it to
TestStemFilterFactory, renamed the class to TestStemFilterFactory
- Successfully compiled the java using javac, and add the .class file to a
jar file
- Put the jar file in SOLR_HOME/lib
- Put a line <filter class="solr.TestStemFilterFactory" /> in my analyzer
definition in schema.xml
- Restart tomcat
In the Tomcat log, there is an indication that the file is found:
27-Aug-2008 20:58:25 org.apache.solr.core.SolrResourceLoader
createClassLoader
INFO: Adding 'file:/D:/Programs/Solr/lib/Test.jar' to Solr classloader
But then I get errors being reported by Tomcat further down the log file:
SEVERE: org.apache.solr.common.SolrException: Error loading class
'solr.TestStemFilterFactory'
at
org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:256)
at
org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:261)
at
org.apache.solr.util.plugin.AbstractPluginLoader.create(AbstractPluginLoader.java:83)
at
org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:140)
<....>
Caused by: java.lang.ClassNotFoundException: solr.TestStemFilterFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
<.....>
Probably some configuration issue somewhere, but I am in the dark here (as
said: not a Java expert...). I've tried to find information in mailing list
archives on this, but no luck so far. I'm Running Solr nightly build of
20.08.2008, tomcat 5.5.26 on Windows.
Any help would be much appreciated!
Cheers,
Jaco.
