--- a/artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java	Mon Sep 07 13:22:48 2009 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java	Tue Sep 08 06:29:52 2009 +0000
@@ -25,11 +25,15 @@
 import de.intevation.artifacts.ArtifactFactory;
 import de.intevation.artifacts.Artifact;
 
+import org.apache.log4j.Logger;
+
 /**
  *  @author Sascha L. Teichmann
  */
 public class Backend
 {
+    private static Logger logger = Logger.getLogger(Backend.class);
+
     public static final String SQL_NEXT_ID =
         SQL.get("artifacts.id.nextval");
 
@@ -140,6 +144,7 @@
                 return bos.toByteArray();
             }
             catch (IOException ioe) {
+                logger.error(ioe.getLocalizedMessage(), ioe);
                 throw new RuntimeException(ioe);
             }
         }
@@ -155,6 +160,7 @@
             uuid = UUID.fromString(idenitfier);
         }
         catch (IllegalArgumentException iae) {
+            logger.warn(iae.getLocalizedMessage());
             return null;
         }
 
@@ -219,7 +225,7 @@
             return new ArtifactProxy(original, id, false);
         }
         catch (SQLException sqle) {
-            sqle.printStackTrace(System.err);
+            logger.error(sqle.getLocalizedMessage(), sqle);
         }
         finally {
             if (load_result != null) {
@@ -250,13 +256,13 @@
             return (Artifact)ois.readObject();
         }
         catch (IOException ioe) {
-            ioe.printStackTrace(System.err);
+            logger.error(ioe.getLocalizedMessage(), ioe);
         }
         catch (ClassNotFoundException cnfe) {
-            cnfe.printStackTrace(System.err);
+            logger.error(cnfe.getLocalizedMessage(), cnfe);
         }
         catch (ClassCastException cce) {
-            cce.printStackTrace(System.err);
+            logger.error(cce.getLocalizedMessage(), cce);
         }
         finally {
             if (ois != null) {
@@ -269,7 +275,7 @@
     }
 
     protected void artifactOutdated(int id) {
-        System.err.println("artifactOutdated: id = " + id);
+        logger.info("artifactOutdated: id = " + id);
     }
 
     protected int insertDatabase(UUID uuid, Long ttl) {
@@ -316,7 +322,7 @@
             }
         }
         catch (SQLException sqle) {
-            sqle.printStackTrace(System.err);
+            logger.error(sqle.getLocalizedMessage(), sqle);
         }
         finally {
             if (res_id != null) {
@@ -340,7 +346,7 @@
     }
 
     public void touch(ArtifactProxy proxy) {
-        System.err.println("touch: " + proxy);
+        logger.info("touch: " + proxy);
         if (proxy.isUnwritten()) {
             store(proxy);
             return;
@@ -362,7 +368,7 @@
             }
         }
         catch (SQLException sqle) {
-            sqle.printStackTrace(System.err);
+            logger.error(sqle.getLocalizedMessage(), sqle);
         }
         finally {
             if (stmnt_touch != null) {
@@ -377,7 +383,7 @@
     }
 
     public void store(ArtifactProxy proxy) {
-        System.err.println("store: " + proxy);
+        logger.info("store: " + proxy);
         Connection        connection   = null;
         PreparedStatement stmnt_update = null;
         DataSource        dataSource   = DBConnection.getDataSource();
@@ -396,7 +402,7 @@
             }
         }
         catch (SQLException sqle) {
-            sqle.printStackTrace(System.err);
+            logger.error(sqle.getLocalizedMessage(), sqle);
         }
         finally {
             if (stmnt_update != null) {