1 files changed, 111 insertions, 0 deletions
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/stats/StatisticFrontend.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/stats/StatisticFrontend.java
new file mode 100644
index 00000000..3c59a7cc
--- /dev/null
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/stats/StatisticFrontend.java
@@ -0,0 +1,111 @@
+package at.gv.egiz.pdfas.web.stats;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ServiceLoader;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.web.config.WebConfiguration;
+
+public class StatisticFrontend implements StatisticBackend {
+
+	private static StatisticFrontend _instance;
+
+	private static ServiceLoader<StatisticBackend> backendLoader = ServiceLoader
+			.load(StatisticBackend.class);
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(StatisticFrontend.class);
+
+	private List<StatisticBackend> statisticBackends = new ArrayList<StatisticBackend>();
+
+	private StatisticFrontend() {
+		Iterator<StatisticBackend> statisticIterator = backendLoader.iterator();
+		List<String> enabledBackends = WebConfiguration.getStatisticBackends();
+
+		if (enabledBackends == null) {
+			logger.info("No statitistic backends configured using all available.");
+		} else {
+			Iterator<String> enabledBackendsIterator = enabledBackends
+					.iterator();
+			logger.info("Allowing the following statistic backends:");
+			while (enabledBackendsIterator.hasNext()) {
+				logger.info(" - {}", enabledBackendsIterator.next());
+			}
+		}
+
+		while (statisticIterator.hasNext()) {
+			StatisticBackend statisticBackend = statisticIterator.next();
+			
+			if(enabledBackends == null || enabledBackends.contains(statisticBackend
+					.getName())) {
+				logger.info("adding Statistic Logger {} [{}]", statisticBackend
+						.getName(), statisticBackend.getClass().getName());
+				
+				statisticBackends.add(statisticBackend);	
+			} else {
+				logger.info("skipping Statistic Logger {} [{}]", statisticBackend
+						.getName(), statisticBackend.getClass().getName());
+			}
+		}
+		
+		
+		Iterator<String> enabledBackendsIterator = enabledBackends
+				.iterator();
+		while (enabledBackendsIterator.hasNext()) {
+			String enabledBackend = enabledBackendsIterator.next();
+			statisticIterator = statisticBackends.iterator();
+			boolean found = false;
+			while (statisticIterator.hasNext()) {
+				StatisticBackend statisticBackend = statisticIterator.next();
+				if(statisticBackend.getName().equals(enabledBackend)) {
+					found = true;
+					break;
+				}
+ 			}
+			
+			if(!found) {
+				logger.warn("Failed to load statistic backend {}. Not in classpath?", enabledBackend);
+			}
+		}
+	}
+
+	public static StatisticFrontend getInstance() {
+		if (_instance == null) {
+			_instance = new StatisticFrontend();
+		}
+		return _instance;
+	}
+
+	
+	@Override
+	public String getName() {
+		return StatisticFrontend.class.getSimpleName();
+	}
+	
+
+	@Override
+	public void storeEvent(StatisticEvent statisticEvent) {
+		
+		if(statisticEvent == null) {
+			logger.warn("Tried to log null as statisticEvent!");
+			return;
+		}
+		
+		if(statisticEvent.isLogged()) {
+			logger.warn("Tried to relog statisticEvent!");
+			return;
+		}
+		
+		Iterator<StatisticBackend> statisticBackendIterator = statisticBackends.iterator();
+		
+		while(statisticBackendIterator.hasNext()) {
+			StatisticBackend statisticBackend = statisticBackendIterator.next();
+			statisticBackend.storeEvent(statisticEvent);
+		}
+	}
+
+}