VIVO-742 Setup the Application properly, and guard against NPEs

webapp/src/edu/cornell/mannlib/vitro/webapp/application/ApplicationImpl.java

@@ -3,22 +3,28 @@
 package edu.cornell.mannlib.vitro.webapp.application;
 
 import javax.servlet.ServletContext;
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
 
 import edu.cornell.mannlib.vitro.webapp.modules.Application;
 import edu.cornell.mannlib.vitro.webapp.modules.searchEngine.SearchEngine;
 import edu.cornell.mannlib.vitro.webapp.searchengine.SearchEngineWrapper;
 import edu.cornell.mannlib.vitro.webapp.searchengine.solr.SolrSearchEngine;
+import edu.cornell.mannlib.vitro.webapp.startup.StartupStatus;
 
 /**
  * The basic implementation of the Application interface.
  */
 public class ApplicationImpl implements Application {
+	// ----------------------------------------------------------------------
+	// The instance
+	// ----------------------------------------------------------------------
+
 	private final ServletContext ctx;
 	private SearchEngine searchEngine;
 
 	public ApplicationImpl(ServletContext ctx) {
 		this.ctx = ctx;
-		setSearchEngine(new SolrSearchEngine());
 	}
 
 	@Override
@@ -32,10 +38,37 @@ public class ApplicationImpl implements Application {
 	}
 
 	public void setSearchEngine(SearchEngine searchEngine) {
-		if (searchEngine instanceof SearchEngineWrapper) {
-			this.searchEngine = searchEngine;
-		} else {
-			this.searchEngine = new SearchEngineWrapper(searchEngine);
+		this.searchEngine = searchEngine;
+	}
+
+	// ----------------------------------------------------------------------
+	// The Setup class.
+	// ----------------------------------------------------------------------
+
+	public static class Setup implements ServletContextListener {
+
+		@Override
+		public void contextInitialized(ServletContextEvent sce) {
+			ServletContext ctx = sce.getServletContext();
+			StartupStatus ss = StartupStatus.getBean(ctx);
+
+			try {
+				SearchEngine searchEngine = new SearchEngineWrapper(
+						new SolrSearchEngine());
+
+				ApplicationImpl application = new ApplicationImpl(ctx);
+				application.setSearchEngine(searchEngine);
+				ApplicationUtils.setInstance(application);
+				ss.info(this, "Appliation is configured.");
+			} catch (Exception e) {
+				ss.fatal(this, "Failed to initialize the Application.", e);
+			}
 		}
+
+		@Override
+		public void contextDestroyed(ServletContextEvent sce) {
+			// Nothing to tear down.
+		}
+
 	}
 }

webapp/src/edu/cornell/mannlib/vitro/webapp/application/ApplicationUtils.java

@@ -25,5 +25,9 @@ public class ApplicationUtils {
 					"Called for Application before it was available", e);
 		}
 	}
+	
+	static void setInstance(Application application) {
+		instance = application;
+	}
 
 }

webapp/src/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrConversionUtils.java

@@ -148,8 +148,11 @@ public class SolrConversionUtils {
 	private static Map<String, SearchFacetField> convertToSearchFacetFieldMap(
 			List<FacetField> facetFields) {
 		Map<String, SearchFacetField> map = new HashMap<>();
-		for (FacetField facetField : facetFields) {
-			map.put(facetField.getName(), convertToSearchFacetField(facetField));
+		if (facetFields != null) {
+			for (FacetField facetField : facetFields) {
+				map.put(facetField.getName(),
+						convertToSearchFacetField(facetField));
+			}
 		}
 		return map;
 	}
@@ -163,9 +166,11 @@ public class SolrConversionUtils {
 	private static List<BaseCount> convertToSearchFacetFieldCounts(
 			List<FacetField.Count> solrCounts) {
 		List<BaseCount> searchCounts = new ArrayList<>();
-		for (FacetField.Count solrCount : solrCounts) {
-			searchCounts.add(new BaseCount(solrCount.getName(), solrCount
-					.getCount()));
+		if (solrCounts != null) {
+			for (FacetField.Count solrCount : solrCounts) {
+				searchCounts.add(new BaseCount(solrCount.getName(), solrCount
+						.getCount()));
+			}
 		}
 		return searchCounts;
 	}

webapp/src/edu/cornell/mannlib/vitro/webapp/searchengine/solr/SolrSearchResultDocumentList.java

@@ -21,7 +21,15 @@ public class SolrSearchResultDocumentList implements SearchResultDocumentList {
 	private SolrDocumentList solrDocs;
 
 	public SolrSearchResultDocumentList(SolrDocumentList solrDocs) {
-		this.solrDocs = solrDocs;
+		if (solrDocs == null) {
+			SolrDocumentList list = new SolrDocumentList();
+			list.setStart(0L);
+			list.setNumFound(0L);
+			list.setMaxScore(0.0F);
+			this.solrDocs = list;
+		} else {
+			this.solrDocs = solrDocs;
+		}
 	}
 
 	@Override