95 lines
2.8 KiB
Java
95 lines
2.8 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.TimeUnit;
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import org.gcube.datatransfer.resolver.applicationprofile.ApplicationProfileReader;
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import org.gcube.datatransfer.resolver.listeners.UriResolverStartupListener;
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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 LoadingGisViewerApplicationURLCache.
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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 LoadingGisViewerApplicationURLCache {
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private static Logger logger = LoggerFactory.getLogger(LoadingGisViewerApplicationURLCache.class);
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//A cache (Scope, GisViewerApplication-URL)
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private static LoadingCache<String, String> gisViewerApplicationURLCache;
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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 scope)
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throws Exception {
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logger.info("Loading the cache for scope: "+scope);
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return loadGisViewerApplicationURL(scope);
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}
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};
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RemovalListener<String, String> removalListener = new RemovalListener<String, String>() {
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public void onRemoval(RemovalNotification<String, String> removal) {
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logger.info(LoadingGisViewerApplicationURLCache.class.getSimpleName() +" cache expired");
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}
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};
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gisViewerApplicationURLCache =
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CacheBuilder.newBuilder().maximumSize(100).expireAfterWrite(
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1, TimeUnit.DAYS).removalListener(removalListener).
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build(loader);
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logger.info(LoadingGisViewerApplicationURLCache.class.getSimpleName() +" instancied");
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}
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/**
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* Gets the cache.
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*
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* @return the cache
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*/
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public static LoadingCache<String, String> getCache() {
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return gisViewerApplicationURLCache;
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}
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/**
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* Load gis viewer application url.
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*
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* @param scope the scope
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* @return the string
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*/
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public static String loadGisViewerApplicationURL(String scope){
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if (scope == null || scope.isEmpty())
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logger.warn("Scope is null or ermpty, skipping loadGisViewerApplicationURL");
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ApplicationProfileReader reader = new ApplicationProfileReader(scope, UriResolverStartupListener.getGisViewerProfile().getGenericResource(), UriResolverStartupListener.getGisViewerProfile().getAppId(), false);
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if(reader.getApplicationProfile()==null){
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logger.error("NO Appllication Profile "+UriResolverStartupListener.getGisViewerProfile().getAppId()+" found in the scope: "+scope+", returning null!");
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return null;
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}
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String url = reader.getApplicationProfile().getUrl();
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logger.info("With scope "+scope+" loaded the GisViewer Application URL "+url);
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return url;
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}
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}
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