/**
* This method is called when a used handler factory disappears. This method is synchronized to
* avoid concurrent calls to method modifying the factory state.
*
* @param reference the leaving service reference.
* @param service the handler factory object.
* @see
* org.apache.felix.ipojo.util.TrackerCustomizer#removedService(org.osgi.framework.ServiceReference,
* java.lang.Object)
*/
public synchronized void removedService(ServiceReference reference, Object service) {
// Look for the implied reference and invalid the handler identifier
for (Object m_requiredHandler : m_requiredHandlers) {
RequiredHandler req = (RequiredHandler) m_requiredHandler;
if (reference.equals(req.getReference())) {
req.unRef(); // This method will unget the service.
computeFactoryState();
return; // The factory can be used only once.
}
}
}
/**
* This will be called on each
*
* <ul>
* <li>update to the Component configuration (activate, deactivate)
* <li>updates on the SolrCore
* </ul>
*
* on any detected change it will update the registered EnhancementEngine.
*
* <p>This also initialises the FST configuration.
*
* @param reference the ServiceRefernece for the SolrServer or <code>null</code> in case the
* service is no longer available.
* @param server the SolrServer (or <code>null</code>
*/
protected void updateEngineRegistration(ServiceReference reference, SolrServer server) {
log.info(" ... updateEngineRegistration for {}: {}", getClass().getSimpleName(), engineName);
if (reference != null && server == null) {
server = solrServerTracker.getService(reference);
}
if (reference == null && this.indexReference == null) {
// unregisterEngine(); //unregister existing
return; // and return
}
BundleContext bundleContext = this.bundleContext;
synchronized (this) { // init one after the other in case of multiple calls
SolrCore core;
IndexConfiguration indexConfig; // the indexConfig build by this call
try { // try to init - finally unregisterEngine
if (bundleContext == null) { // already deactivated
return; // NOTE: unregistering is done in finally block
}
if (reference != null) {
if (reference.equals(this.solrServerReference)) {
// use the current core
core = solrCore;
} else { // get the SolrCore from the EmbeddedSolrServer
core = getSolrCore(server);
}
} else { // SolrCore not available
core = null;
}
if (core == null) { // no SolrCore
log.info(" - SolrCore {} present", this.solrCore == null ? "not yet" : "no longer");
return; // NOTE: unregistering is done in finally block
} // else - we do have a SolrCore
// File fstDir = new File(dataDir,"fst");
// now collect the FST configuration
indexConfig = new IndexConfiguration(fstConfig, core, fieldEncoding);
indexConfig.setTypeField(solrTypeField);
indexConfig.setRankingField(solrRankingField);
// set fields parsed in the activate method
indexConfig.setExecutorService(fstCreatorService);
indexConfig.setRedirectField(null); // TODO add support
// NOTE: the FST cofnig is processed even if the SolrCore has not changed
// because their might be config changes and/or new FST files in the
// FST directory of the SolrCore.
indexConfig.setFstDirectory(getFstDirectory(core, fstFolder));
// set the DocumentCacheFactory
if (entityCacheSize > 0) {
indexConfig.setEntityCacheManager(new FastLRUCacheManager(entityCacheSize));
} // else no entityCache is used
if (skipAltTokensConfig != null) {
indexConfig.setSkipAltTokens(skipAltTokensConfig);
}
// create a new searcher for creating FSTs
if (!indexConfig.activate()) {
log.warn(
"Processing of the FST configuration was not successfull "
+ "for any language. See WARN level loggings for more details!");
log.warn(
" ... FstLinkingEnigne wiht name {} will be registered but"
+ "be inactive as there seam to be no data for linking available"
+ "in the SolrCore {} (dir: {})",
new Object[] {engineName, core.getName(), core.getCoreDescriptor().getInstanceDir()});
} else { // some FST corpora initialised
if (log.isInfoEnabled()) { // log the initialised languages
Set<String> langSet = new HashSet<String>(indexConfig.getCorpusLanguages());
if (langSet.remove(null)) { // replace the null for the default language
langSet.add(""); // with an empty string
}
String[] langArray = langSet.toArray(new String[langSet.size()]);
Arrays.sort(langArray, String.CASE_INSENSITIVE_ORDER);
log.info(" ... initialised FST corpora for languages {}", Arrays.toString(langArray));
}
}
} finally {
// in any case (even an Exception) ensure that the current
// engine registration is unregistered and the currently used
// SolrCore is unregistered!
unregisterEngine();
}
// check if we need to create some FST files
for (CorpusInfo fstInfo : indexConfig.getCorpora()) {
// check if the fst does not exist and the fstInfo allows creation
if (!fstInfo.fst.exists() && fstInfo.allowCreation) {
// create a task on the FST corpus creation service
fstCreatorService.execute(new CorpusCreationTask(indexConfig, fstInfo));
}
}
// set the default linking corpora
String defaultLanguage = entityLinkerConfig.getDefaultLanguage();
if (defaultLanguage == null) {
defaultLanguage = ""; // FST uses an empty string for the default
}
CorpusInfo defaultCoprous = indexConfig.getCorpus(defaultLanguage);
if (defaultCoprous != null) {
log.info(
" ... set '{}' as default FST Corpus: {}", defaultCoprous.language, defaultCoprous);
indexConfig.setDefaultCorpus(defaultCoprous);
} else {
log.info(" ... no corpus for default language {} available", defaultCoprous);
}
// set the index configuration to the field;
this.indexConfig = indexConfig;
FstLinkingEngine engine =
new FstLinkingEngine(engineName, indexConfig, textProcessingConfig, entityLinkerConfig);
String[] services =
new String[] {EnhancementEngine.class.getName(), ServiceProperties.class.getName()};
log.info(" ... register {}: {}", engine.getClass().getSimpleName(), engineName);
this.engineRegistration = bundleContext.registerService(services, engine, engineMetadata);
this.solrServerReference = reference;
this.solrCore = core;
}
}
