package org.jboss.cache.search;
import org.hibernate.search.impl.SearchFactoryImpl;
import org.hibernate.search.cfg.SearchConfiguration;
import org.hibernate.search.engine.SearchFactoryImplementor;
import org.jboss.cache.Cache;
import org.jboss.cache.CacheStatus;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.Properties;
import java.lang.reflect.Field;
/**
* @author Navin Surtani - navin@surtani.org
*/
public class SearchableCacheFactory
{
private static final Log log = LogFactory.getLog(SearchableCacheFactory.class);
/**
* Creates a searchable cache from a cache object and a class array, without the properties object.
*
* @param c - the Cache
* @param classes - Class array to be added
* @return a SearchableCache
*/
public SearchableCache createSearchableCache(Cache<?, ?> c, Class... classes)
{
return createSearchableCache(c, null, classes);
}
/**
* This method creates a searchable cache as well but requires the properties object.
*
* @param c - the Cache
* @param properties - java.util.properties
* @param classes - a class array
* @return a SearchableCache
*/
public SearchableCache createSearchableCache(Cache<?, ?> c, Properties properties, Class... classes)
{
//validate the classes first. make sure the correct annotations are put in.
validateClasses(classes);
// assume cache is already created and running.
// otherwise, start the cache!!
if (c.getCacheStatus() != CacheStatus.STARTED)
{
if (log.isInfoEnabled()) log.info("Cache not started. Starting cache first.");
c.start();
}
if (classes.length == 0)
{
if (log.isWarnEnabled()) log.warn("You haven't passed in any classes to index. Is this an error?");
}
// step 1: create hibernate search searchFactory
SearchConfiguration cfg = new SearchableCacheCfgImpl(classes, properties);
// set classes in the cfg
SearchFactoryImplementor searchFactory = new SearchFactoryImpl(cfg);
// boolean isPojoCache = c instanceof PojoCache; keep this for later usage
// Step 2: Add cache listener to listen for events happening in the cache.
//SearchableListener listener = isPojoCache ? new SearchablePojoListener(searchFactory) : new SearchableCoreListener(searchFactory);
SearchableCoreListener listener = new SearchableCoreListener(searchFactory);
c.addCacheListener(listener);
// step 3: create the searchable cache delegate.
SearchableCache sc = new SearchableCacheImpl(c, searchFactory);
return sc;
}
private void validateClasses(Class... classes)
{
for(Class c: classes)
{
if (!c.isAnnotationPresent(org.hibernate.search.annotations.ProvidedId.class)) throw new IllegalArgumentException ("There is no provided id on " + c.getName() + " class");
for(Field field: c.getFields())
{
if (field.getAnnotation(org.hibernate.search.annotations.DocumentId.class) != null) throw new IllegalArgumentException("Please remove the documentId annotation in " + c.getName());
}
}
}
}