Examples with EntityLinkingEngine org.apache.stanbol.enhancer.engines.entitylinking.engine.EntityLinkingEngine used on opensource projects

Example 1 with EntityLinkingEngine

use of org.apache.stanbol.enhancer.engines.entitylinking.engine.EntityLinkingEngine in project stanbol by apache.

the class EntityhubLinkingEngine method activate.

@Activate
@SuppressWarnings("unchecked")
protected void activate(ComponentContext ctx) throws ConfigurationException {
    Dictionary<String, Object> properties = ctx.getProperties();
    bundleContext = ctx.getBundleContext();
    EntityLinkerConfig linkerConfig = EntityLinkerConfig.createInstance(properties, prefixService);
    TextProcessingConfig textProcessingConfig = TextProcessingConfig.createInstance(properties);
    Object value = properties.get(SITE_ID);
    // init the EntitySource
    if (value == null) {
        throw new ConfigurationException(SITE_ID, "The ID of the Referenced Site is a required Parameter and MUST NOT be NULL!");
    }
    siteName = value.toString();
    if (siteName.isEmpty()) {
        throw new ConfigurationException(SITE_ID, "The ID of the Referenced Site is a required Parameter and MUST NOT be an empty String!");
    }
    // get the metadata later set to the enhancement engine
    String engineName;
    engineMetadata = new Hashtable<String, Object>();
    value = properties.get(PROPERTY_NAME);
    if (value == null || value.toString().isEmpty()) {
        throw new ConfigurationException(PROPERTY_NAME, "The EnhancementEngine name MUST BE configured!");
    } else {
        engineName = value.toString();
    }
    engineMetadata.put(PROPERTY_NAME, value);
    value = properties.get(Constants.SERVICE_RANKING);
    engineMetadata.put(Constants.SERVICE_RANKING, value == null ? Integer.valueOf(0) : value);
    // init the tracking entity searcher
    trackedServiceCount = 0;
    if (Entityhub.ENTITYHUB_IDS.contains(siteName.toLowerCase())) {
        entitySearcher = new EntityhubSearcher(bundleContext, 10, this);
    } else {
        entitySearcher = new ReferencedSiteSearcher(bundleContext, siteName, 10, this);
    }
    labelTokenizerTracker = new ServiceTracker(bundleContext, LabelTokenizer.class.getName(), new ServiceTrackerCustomizer() {

        @Override
        public Object addingService(ServiceReference reference) {
            Object service = bundleContext.getService(reference);
            if (service == null) {
                return service;
            }
            synchronized (labelTokenizersRefs) {
                labelTokenizersRefs.add(reference);
                ServiceReference higest;
                try {
                    higest = labelTokenizersRefs.last();
                } catch (NoSuchElementException e) {
                    higest = null;
                }
                EntityLinkingEngine engine = entityLinkingEngine;
                ServiceTracker tracker = labelTokenizerTracker;
                if (engine != null && tracker != null) {
                    LabelTokenizer lt = (LabelTokenizer) (reference.equals(higest) || higest == null ? service : tracker.getService(higest));
                    if (!lt.equals(engine.getLabelTokenizer())) {
                        log.info(" ... setting LabelTokenizer of Engine '{}' to {}", engine.getName(), lt);
                        engine.setLabelTokenizer(lt);
                    }
                }
            // if engine or tracker is null deactivate was already called
            }
            return service;
        }

        @Override
        public void removedService(ServiceReference reference, Object service) {
            synchronized (labelTokenizersRefs) {
                // override
                labelTokenizersRefs.remove(reference);
                EntityLinkingEngine engine = entityLinkingEngine;
                ServiceTracker tracker = labelTokenizerTracker;
                if (engine != null && tracker != null) {
                    if (labelTokenizersRefs.isEmpty()) {
                        log.info(" ... setting LabelTokenizer of Engine '{}' to null", engine.getName());
                        engine.setLabelTokenizer(null);
                    } else {
                        LabelTokenizer lt = (LabelTokenizer) tracker.getService(labelTokenizersRefs.last());
                        if (!lt.equals(engine.getLabelTokenizer())) {
                            log.info(" ... setting LabelTokenizer of Engine '{}' to {}", engine.getName(), lt);
                            engine.setLabelTokenizer(lt);
                        }
                    }
                }
            // if engine or tracker is null deactivate was already called
            }
            bundleContext.ungetService(reference);
        }

        @Override
        public void modifiedService(ServiceReference reference, Object service) {
            synchronized (labelTokenizersRefs) {
                // override
                labelTokenizersRefs.remove(reference);
                labelTokenizersRefs.add(reference);
                ServiceReference higest;
                try {
                    higest = labelTokenizersRefs.last();
                } catch (NoSuchElementException e) {
                    higest = null;
                }
                EntityLinkingEngine engine = entityLinkingEngine;
                ServiceTracker tracker = labelTokenizerTracker;
                if (engine != null && tracker != null) {
                    LabelTokenizer lt = (LabelTokenizer) (reference.equals(higest) || higest == null ? service : tracker.getService(higest));
                    if (!lt.equals(engine.getLabelTokenizer())) {
                        log.info(" ... setting LabelTokenizer of Engine '{}' to {}", engine.getName(), lt);
                        engine.setLabelTokenizer(lt);
                    }
                }
            // if engine or tracker is null deactivate was already called
            }
        }
    });
    // create the engine
    entityLinkingEngine = new EntityLinkingEngine(engineName, // the searcher might not be available
    entitySearcher, textProcessingConfig, linkerConfig, null);
    // start tracking
    labelTokenizerTracker.open();
    entitySearcher.open();
}