--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/services/D4EService.java	Sun Apr 28 15:26:59 2013 +0200
@@ -0,0 +1,67 @@
+/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
+ * Software engineering by Intevation GmbH
+ *
+ * This file is Free Software under the GNU AGPL (>=v3) 
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details. 
+ */
+
+package org.dive4elements.river.artifacts.services;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+
+import org.dive4elements.artifacts.CallMeta;
+import org.dive4elements.artifacts.GlobalContext;
+
+import org.dive4elements.artifactdatabase.XMLService;
+
+import org.dive4elements.river.backend.SessionHolder;
+
+
+public abstract class D4EService extends XMLService {
+
+    private static final Logger logger = Logger.getLogger(D4EService.class);
+
+
+    @Override
+    public Document processXML(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        init();
+
+        try {
+            return doProcess(data, globalContext, callMeta);
+        }
+        finally {
+            shutdown();
+        }
+    }
+
+
+    protected abstract Document doProcess(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta);
+
+
+    protected void init() {
+        logger.debug("init");
+        SessionHolder.acquire();
+    }
+
+
+    protected void shutdown() {
+        logger.debug("shutdown");
+        Session session = SessionHolder.HOLDER.get();
+        session.close();
+
+        SessionHolder.release();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :