104 lines
3.0 KiB
Java
104 lines
3.0 KiB
Java
/**
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*
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*/
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package org.gcube.datatransfer.resolver.caches;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.TimeUnit;
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import org.gcube.datatransfer.resolver.gis.GeonetworkAccessParameter;
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import org.gcube.datatransfer.resolver.gis.GeonetworkAccessParameter.AccountType;
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import org.gcube.datatransfer.resolver.gis.GeonetworkAccessParameter.GeonetworkLoginLevel;
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import org.gcube.datatransfer.resolver.gis.GeonetworkInstance;
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import org.gcube.datatransfer.resolver.gis.exception.GeonetworkInstanceException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.cache.CacheBuilder;
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import com.google.common.cache.CacheLoader;
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import com.google.common.cache.LoadingCache;
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import com.google.common.cache.RemovalListener;
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import com.google.common.cache.RemovalNotification;
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/**
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* The Class LoadingGeonetworkInstanceCache.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
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* Nov 5, 2018
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*/
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public class LoadingGeonetworkInstanceCache {
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private static Logger logger = LoggerFactory.getLogger(LoadingGeonetworkInstanceCache.class);
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//A cache (Scope, GeonetworkInstance)
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private static LoadingCache<String, GeonetworkInstance> geonetworkInstancesCache;
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static {
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CacheLoader<String, GeonetworkInstance> loader = new CacheLoader<String, GeonetworkInstance> () {
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@Override
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public GeonetworkInstance load(String scope)
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throws Exception {
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logger.info("Loading the cache for scope: "+scope);
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return loadGeonetworkInstance(scope);
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}
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};
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RemovalListener<String, GeonetworkInstance> removalListener = new RemovalListener<String, GeonetworkInstance>() {
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public void onRemoval(RemovalNotification<String, GeonetworkInstance> removal) {
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logger.info("cache expired");
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}
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};
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geonetworkInstancesCache =
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CacheBuilder.newBuilder().maximumSize(1000).expireAfterWrite(
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1, TimeUnit.DAYS).removalListener(removalListener).
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build(loader);
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logger.info("cache instancied");
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}
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/**
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* Gets the.
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*
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* @param scope the scope
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* @return the geonetwork instance
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* @throws ExecutionException the execution exception
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*/
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public static GeonetworkInstance get(String scope) throws ExecutionException{
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return geonetworkInstancesCache.get(scope);
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}
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/**
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* Load geonetwork instance.
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*
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* @param scope the scope
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* @return the geonetwork instance
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* @throws GeonetworkInstanceException the geonetwork instance exception
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*/
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protected static GeonetworkInstance loadGeonetworkInstance(String scope)
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throws GeonetworkInstanceException {
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if (scope == null || scope.isEmpty()){
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logger.warn("Scope is null or empty, returning GeonetworkInstance as null");
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return null;
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}
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GeonetworkAccessParameter gntwAccess = new GeonetworkAccessParameter(scope);
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/*
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*
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*
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* !!!!!!!DOES NOT AUTHENTICATE NEVER!!!!!!
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*
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*/
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GeonetworkInstance geoInstance = gntwAccess.getGeonetworkInstance(false, GeonetworkLoginLevel.CKAN, AccountType.CKAN);
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logger.info("Loaded "+geoInstance+" for scope: " + scope);
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return geoInstance;
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}
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}
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