SNOMED International Mapping Tool

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Overview

This page documents the use of admin tools to rebuild the Lucene index.  Indexes are created based on the hibernate-search annotations on model objects such as @Indexed, @IndexedEmbedded, @Field, @ContainedIn, etc.

 

Prerequisites

For this mojo to run, the file system directory specified by the "hibernate.search.default.indexBase" must exist.

 

Details

This tool is used to rebuild Lucene indexes for objects indexed by the system.

Indexes are written into the directory specified by the hibernate.search.default.indexBase property in the 

 

Following are some details about the implementation of this tool:

Mojo: LuceneReindexMojo.java (in admin/mojo/src/main/resources/java/org/ihtsdo/otf/mapping/mojo)

Project: admin/lucene

Configuration Parameters

  • run.config - the standard configuration file specified as a -D parameter

  • indexedObjects - optional parameter that allows only some indexes to be rebulit (e.g. MapRecordJpa).

 

Samples

Sample command line call of the admin tool to rebuild all indexes:

% cd mapping-parent/admin/lucene
% mvn -Drun.config=/home/ihtsdo/data/config.properties install

 

Sample command line call of the admin tool to reindex only certain data structures:

# Re-indexes only map records and tracking records
% cd mapping-parent/admin/lucene
% mvn -Drun.config=/home/ihtsdo/data/config.properties -DindexedObjects=MapRecordJpa,TrackingRecordJpa install

 

Sample Eclipse run configuration:

 

Troubleshooting

Sometimes issues arise with the indexes (in particular when running admin tools while the Tomcat server is also running).  Occasionally it is necessary to completely reindex all objects from scratch.  When this is needed, the recommended approach is to remove the index files from the index and then run this mojo.  For example, to guarantee a clean index rebuild, you could do this:

# stop the server
% service tomcat7 stop
 
# remove the index
% /bin/rm -rf /var/lib/tomcat7/indexes/lucene/indexes/*MapRecordJpa
 
# rebuild the index
% cd ~/code/mapping-parent/admin/lucene
% mvn -Drun.config=/home/ihtsdo/data/config.properties -DindexedObjects=MapRecordJpa install
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