added fallback for GcoreReaderEndPoint social

git-svn-id: http://svn.d4science-ii.research-infrastructures.eu/gcube/trunk/portlets/widgets/ckan-metadata-publisher-widget@144038 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/utils/ServiceEndPointReaderSocial.java

@@ -0,0 +1,102 @@
+package org.gcube.portlets.widgets.ckandatapublisherwidget.server.utils;
+
+import static org.gcube.resources.discovery.icclient.ICFactory.clientFor;
+import static org.gcube.resources.discovery.icclient.ICFactory.queryFor;
+
+import java.util.Iterator;
+import java.util.List;
+import org.gcube.common.resources.gcore.ServiceEndpoint;
+import org.gcube.common.resources.gcore.ServiceEndpoint.AccessPoint;
+import org.gcube.common.scope.api.ScopeProvider;
+import org.gcube.resources.discovery.client.api.DiscoveryClient;
+import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+/**
+ * Retrieves the base url of the social-networking service in the scope provided
+ * @author Costantino Perciante at ISTI-CNR 
+ * (costantino.perciante@isti.cnr.it)
+ */
+public class ServiceEndPointReaderSocial {
+
+	private String basePath = null;
+
+	private static Logger logger = LoggerFactory.getLogger(ServiceEndPointReaderSocial.class);
+	private final static String RUNTIME_RESOURCE_NAME = "SocialNetworking";
+	private final static String CATEGORY = "Portal";
+
+	public ServiceEndPointReaderSocial(String context){
+
+		if(context == null || context.isEmpty())
+			throw new IllegalArgumentException("A valid context is needed to discover the service");
+
+
+		String oldContext = ScopeProvider.instance.get();
+		ScopeProvider.instance.set(context);
+
+		try{
+
+			List<ServiceEndpoint> resources = getConfigurationFromIS();
+			if (resources.size() == 0){
+				logger.error("There is no Runtime Resource having name " + RUNTIME_RESOURCE_NAME +" and Category " + CATEGORY + " in this scope.");
+				throw new Exception("There is no Runtime Resource having name " + RUNTIME_RESOURCE_NAME +" and Category " + CATEGORY + " in this scope.");
+			}
+			else {
+
+				for (ServiceEndpoint res : resources) {
+
+					Iterator<AccessPoint> accessPointIterator = res.profile().accessPoints().iterator();
+
+					while (accessPointIterator.hasNext()) {
+						ServiceEndpoint.AccessPoint accessPoint = (ServiceEndpoint.AccessPoint) accessPointIterator
+								.next();
+
+						// get base path
+						basePath = accessPoint.address();
+
+						// break
+						break;
+					}
+				}
+
+			}
+
+		}catch(Exception e){
+
+			logger.error("Unable to retrieve such service endpoint information!", e);
+
+		}finally{
+
+			if(oldContext != null && !oldContext.equals(context))
+				ScopeProvider.instance.set(oldContext);
+
+		}
+
+		logger.info("Found base path " + basePath + " for the service");
+
+	}
+
+	/**
+	 * Retrieve endpoints information from IS for the Service endpoint
+	 * @return list of endpoints
+	 * @throws Exception
+	 */
+	private List<ServiceEndpoint> getConfigurationFromIS() throws Exception{
+
+		SimpleQuery query = queryFor(ServiceEndpoint.class);
+		query.addCondition("$resource/Profile/Name/text() eq '"+ RUNTIME_RESOURCE_NAME +"'");
+		query.addCondition("$resource/Profile/Category/text() eq '"+ CATEGORY +"'");
+		DiscoveryClient<ServiceEndpoint> client = clientFor(ServiceEndpoint.class);
+		List<ServiceEndpoint> toReturn = client.submit(query);
+		return toReturn;
+
+	}
+
+	/**
+	 * Get the base path of the social networking service
+	 * @return
+	 */
+	public String getBasePath() {
+		return basePath;
+	}
+}

src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/utils/Utils.java

@@ -399,12 +399,19 @@ public class Utils {
 
 		logger.info("Current scope for writeProductPost is " + currentScope + " and token is " + tokenUser.substring(0, 10) + "***************");
 		String basePath = new GCoreEndPointReaderSocial(currentScope).getBasePath();
+		
+		// add fallback
+		if(basePath == null || basePath.isEmpty())
+			new ServiceEndPointReaderSocial(currentScope).getBasePath();
 
 		if(basePath == null){
 
 			logger.error("Unable to write a post because there is no social networking service available");
 
 		}else{
+			
+			// check base path form
+			basePath = basePath.endsWith("/") ? basePath : basePath + "/";
 
 			try(CloseableHttpClient client = HttpClientBuilder.create().build();){