132 lines
3.6 KiB
Java
132 lines
3.6 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.Map;
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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.common.scope.api.ScopeProvider;
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import org.gcube.datatransfer.resolver.catalogue.resource.GetAllInfrastructureVREs;
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import org.gcube.datatransfer.resolver.init.UriResolverSmartGearManagerInit;
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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 LoadingVREsScopeCache.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
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* Nov 8, 2018
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*/
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public class LoadingVREsScopeCache {
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private static Logger logger = LoggerFactory.getLogger(LoadingVREsScopeCache.class);
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private static LoadingCache<String, String> vresNameToScope;
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static{
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CacheLoader<String, String> loader = new CacheLoader<String, String>(){
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@Override
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public String load(String vreName)
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throws Exception {
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logger.info("Loading the cache for vreName: "+vreName);
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String fullScope = loadFullScopeforVreName(vreName);
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logger.info("Returning fullScope: "+fullScope+ " for the VRE name: "+vreName);
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return fullScope;
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}
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};
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RemovalListener<String, String> removalListener = new RemovalListener<String, String>() {
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@Override
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public void onRemoval(RemovalNotification<String, String> arg0) {
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logger.info("cache expired");
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//prePopulateCache();
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}
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};
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vresNameToScope = CacheBuilder.newBuilder().maximumSize(300).expireAfterWrite(
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1, TimeUnit.DAYS).removalListener(removalListener).
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build(loader);
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//Populating the cache at init stage
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populateTheCache();
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logger.info("Pre-Loaded VRE to Scope cache with: "+vresNameToScope.asMap().size()+" item/s");
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}
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/**
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* Populate the cache.
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*/
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private static void populateTheCache(){
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try{
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//POPULATE THE CACHE READING THE RESOURCE "CATALOGUE-RESOLVER"
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logger.info("Trying to pre-populate the cache with mapping (VRE Name, VRE Full Scope)");
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ScopeProvider.instance.set(UriResolverSmartGearManagerInit.getRootContextScope());
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Map<String, String> map = GetAllInfrastructureVREs.loadMapOFVreNameToScope(UriResolverSmartGearManagerInit.getRootContextScope());
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vresNameToScope.asMap().putAll(map);
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logger.info("Cache populated with: "+vresNameToScope.asMap().toString());
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//logger.info("Pre-Loaded CatalogueApplicationProfiles cache is: "+catalogueApplicationProfiles.asMap().toString());
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if(UriResolverSmartGearManagerInit.getRootContextScope().compareTo("/gcube")==0){
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logger.warn("HARD-CABLING PARTHENOS_Registry scope to test PARTHENOS_REGISTRY Link in dev environment");
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vresNameToScope.asMap().put("PARTHENOS_Registry", "/d4science.research-infrastructures.eu/ParthenosVO/PARTHENOS_Registry");
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}
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}catch(Exception e){
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}finally{
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}
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}
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/**
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* Gets the.
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*
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* @param vreName the vre name
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* @return the string
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* @throws ExecutionException
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*/
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public static String get(String vreName) throws ExecutionException{
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return vresNameToScope.get(vreName);
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}
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/**
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* Load application profiles.
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*
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* @param vreName the vre name
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* @return the string
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*/
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protected static String loadFullScopeforVreName(String vreName){
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//THIS CHECK SHOULD BE NOT NEEDED
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String fullScope = vresNameToScope.getIfPresent(vreName);
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if(fullScope==null){
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populateTheCache();
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fullScope = vresNameToScope.getIfPresent(vreName);
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}
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return fullScope;
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}
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}
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