add writer to store the configuration in key-value database

use solely kv database within 'AuthConfigurationProvider'
add constants declaring db keys

10 files changed, 300 insertions, 50 deletions

diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/config/auth/AuthConfigurationProvider.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/config/auth/AuthConfigurationProvider.java
index 5fc416b16..a4eab51d9 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/config/auth/AuthConfigurationProvider.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/config/auth/AuthConfigurationProvider.java
@@ -69,7 +69,10 @@ import at.gv.egovernment.moa.id.auth.AuthenticationServer;
 import at.gv.egovernment.moa.id.auth.MOAIDAuthConstants;
 import at.gv.egovernment.moa.id.commons.db.ConfigurationDBRead;
 import at.gv.egovernment.moa.id.commons.db.ConfigurationDBUtils;
+import at.gv.egovernment.moa.id.commons.db.NewConfigurationDBWrite;
+import at.gv.egovernment.moa.id.commons.db.MOAIDConfigurationConstants;
 import at.gv.egovernment.moa.id.commons.db.MOASessionDBUtils;
+import at.gv.egovernment.moa.id.commons.db.NewConfigurationDBRead;
 import at.gv.egovernment.moa.id.commons.db.StatisticLogDBUtils;
 import at.gv.egovernment.moa.id.commons.db.dao.config.AuthComponentGeneral;
 import at.gv.egovernment.moa.id.commons.db.dao.config.ChainingModes;
@@ -337,7 +340,7 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
 			synchronized (AuthConfigurationProvider.class) {
 				
 				//Initial config Database
-				ConfigurationDBUtils.initHibernate(configProp);
+			//	ConfigurationDBUtils.initHibernate(configProp);
 		   		
 				//initial MOAID Session Database
 				Configuration config = new Configuration();
@@ -413,14 +416,24 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
 		//check if XML config should be used
 		if (MiscUtil.isNotEmpty(legacyconfig) || MiscUtil.isNotEmpty(xmlconfig)) {
 			Logger.warn("WARNING! MOA-ID 2.0 is started with XML configuration. This setup overstrike the actual configuration in the Database!");
-			moaidconfig = ConfigurationDBRead.getMOAIDConfiguration();
-			if (moaidconfig != null)
-				ConfigurationDBUtils.delete(moaidconfig);
+			//moaidconfig = ConfigurationDBRead.getMOAIDConfiguration();
+			moaidconfig = NewConfigurationDBRead.getMOAIDConfiguration();
+			if (moaidconfig.getAuthComponentGeneral()!= null || moaidconfig.getChainingModes() != null || moaidconfig.getTrustedCACertificates() != null || moaidconfig.getDefaultBKUs() != null
+					 || moaidconfig.getSLRequestTemplates() != null || moaidconfig.getTimestampItem() != null || moaidconfig.getPvp2RefreshItem() != null) {
+				
+				// ConfigurationDBUtils.delete(moaidconfig);
+				for(String key : MOAIDConfigurationConstants.getMOAIDConfigurationKeys()){
+					NewConfigurationDBWrite.delete(key);
+				}
+			}
+				
 			
-			List<OnlineApplication> oas = ConfigurationDBRead.getAllOnlineApplications();
+			//List<OnlineApplication> oas = ConfigurationDBRead.getAllOnlineApplications();
+			List<OnlineApplication> oas =  NewConfigurationDBRead.getAllOnlineApplications();
 			if (oas != null && oas.size() > 0) {
-				for (OnlineApplication oa : oas)
-					ConfigurationDBUtils.delete(oa);
+				// for (OnlineApplication oa : oas)
+				// 		ConfigurationDBUtils.delete(oa);
+				NewConfigurationDBWrite.delete("getOnlineApplications");
 			}
 		}
 		
@@ -431,17 +444,19 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
 			MOAIDConfiguration moaconfig = BuildFromLegacyConfig.build(new File(legacyconfig), rootConfigFileDir, null);
 			
 			List<OnlineApplication> oas = moaconfig.getOnlineApplication();
-			for (OnlineApplication oa : oas)
-				ConfigurationDBUtils.save(oa);
+			// for (OnlineApplication oa : oas)
+			// 		ConfigurationDBUtils.save(oa);
+			NewConfigurationDBWrite.saveOnlineApplications(oas);
 
 			moaconfig.setOnlineApplication(null);	
-			ConfigurationDBUtils.save(moaconfig);
+		//	ConfigurationDBUtils.save(moaconfig);
+			NewConfigurationDBWrite.save(moaconfig);
 			
 			Logger.info("Legacy Configuration load is completed.");
 			
 	
 		}
-		
+	
 		//load MOA-ID 2.x config from XML
 		if (MiscUtil.isNotEmpty(xmlconfig)) {
 			Logger.warn("Load configuration from MOA-ID 2.x XML configuration");
@@ -454,12 +469,15 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
 				//ConfigurationDBUtils.save(moaconfig);
 				
 				List<OnlineApplication> importoas = moaconfig.getOnlineApplication();
-				for (OnlineApplication importoa : importoas) {
-					ConfigurationDBUtils.saveOrUpdate(importoa);
-				}
+				// for (OnlineApplication importoa : importoas) {
+				// 		ConfigurationDBUtils.saveOrUpdate(importoa);
+				// }
+
+				NewConfigurationDBWrite.saveOnlineApplications(importoas);
 				
 				moaconfig.setOnlineApplication(null);
-				ConfigurationDBUtils.saveOrUpdate(moaconfig);
+				//ConfigurationDBUtils.saveOrUpdate(moaconfig);
+				NewConfigurationDBWrite.save(moaconfig);
 				
 			} catch (Exception e) {
 				Logger.warn("MOA-ID XML configuration can not be loaded from File.", e);
@@ -479,7 +497,8 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
   public synchronized void reloadDataBaseConfig() throws ConfigurationException {
 		
 		Logger.info("Read MOA-ID 2.0 configuration from database.");
-		moaidconfig = ConfigurationDBRead.getMOAIDConfiguration();
+		//moaidconfig = ConfigurationDBRead.getMOAIDConfiguration();
+		moaidconfig = NewConfigurationDBRead.getMOAIDConfiguration();
 		Logger.info("MOA-ID 2.0 is loaded.");
 		
 		if (moaidconfig == null) {
@@ -759,7 +778,7 @@ public class AuthConfigurationProvider extends ConfigurationProvider implements
 		}
 	
     	//close Database
-    	ConfigurationDBUtils.closeSession();
+   // 	ConfigurationDBUtils.closeSession();
     	
 		date = new Date();
 	}
diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ConfigurationFromDBExtractor.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ConfigurationFromDBExtractor.java
index d657ed16a..78cd8a670 100644
--- a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ConfigurationFromDBExtractor.java
+++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ConfigurationFromDBExtractor.java
@@ -45,47 +45,47 @@ public class ConfigurationFromDBExtractor {
 		return result;
 	}
 
-	@JsonProperty("getAuthComponentGeneral")
+	@JsonProperty(MOAIDConfigurationConstants.AUTH_COMPONENT_GENERAL_KEY)
 	public static AuthComponentGeneral getAuthComponentGeneral() {
 		return getSingleValue("from AuthComponentGeneral", AuthComponentGeneral.class);
 	}
 
-	@JsonProperty("getChainingModes")
+	@JsonProperty(MOAIDConfigurationConstants.CHAINING_MODES_KEY)
 	public static ChainingModes getChainingModes() {
 		return (ChainingModes) getSingleValue("from ChainingModes", ChainingModes.class);
 	}
 
-	@JsonProperty("getOnlineApplications")
+	@JsonProperty(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY)
 	public static List<OnlineApplication> getOnlineApplications() {
 		return getListOfValues("from OnlineApplication", OnlineApplication.class);
 	}
 
-	@JsonProperty("getGenericConfigurations")
+	@JsonProperty(MOAIDConfigurationConstants.GENERIC_CONFIGURATION_KEY)
 	public static List<GenericConfiguration> getGenericConfigurations() {
 		return getListOfValues("from GenericConfiguration", GenericConfiguration.class);
 	}
 
-	@JsonProperty("getTrustedCACertificates")
+	@JsonProperty(MOAIDConfigurationConstants.TRUSTED_CERTIFICATES_KEY)
 	public static String getTrustedCACertificates() {
 		return getSingleValue("select trustedCACertificates from MOAIDConfiguration", String.class);
 	}
 
-	@JsonProperty("getDefaultBKUs")
+	@JsonProperty(MOAIDConfigurationConstants.DEFAULT_BKUS_KEY)
 	public static DefaultBKUs getDefaultBKUs() {
 		return getSingleValue("select defaultBKUs from MOAIDConfiguration", DefaultBKUs.class);
 	}
 
-	@JsonProperty("getSLRequestTemplates")
+	@JsonProperty(MOAIDConfigurationConstants.SLREQUEST_TEMPLATES_KEY)
 	public static SLRequestTemplates getSLRequestTemplates() {
 		return getSingleValue("select SLRequestTemplates from MOAIDConfiguration", SLRequestTemplates.class);
 	}
 
-	@JsonProperty("getTimeStampItem")
+	@JsonProperty(MOAIDConfigurationConstants.TIMESTAMP_ITEM_KEY)
 	public static Date getTimeStampItem() {
 		return getSingleValue("select timestampItem from MOAIDConfiguration", Date.class);
 	}
 
-	@JsonProperty("getPvp2RefreshItem")
+	@JsonProperty(MOAIDConfigurationConstants.PVP2REFRESH_ITEM_KEY)
 	public static Date getPvp2RefreshItem() {
 		return getSingleValue("select pvp2RefreshItem from MOAIDConfiguration", Date.class);
 	}
diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/MOAIDConfigurationConstants.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/MOAIDConfigurationConstants.java
new file mode 100644
index 000000000..dc7c92a1d
--- /dev/null
+++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/MOAIDConfigurationConstants.java
@@ -0,0 +1,35 @@
+package at.gv.egovernment.moa.id.commons.db;
+
+import at.gv.egovernment.moa.id.commons.db.dao.config.MOAIDConfiguration;
+
+/**
+ * 
+ *
+ */
+public final class MOAIDConfigurationConstants {
+
+	private MOAIDConfigurationConstants() {
+		// restrict instantiation
+	}
+
+	// keys for the object in the key-value database
+	public static final String ONLINE_APPLICATIONS_KEY = "OnlineApplications";
+	public static final String AUTH_COMPONENT_GENERAL_KEY = "AuthComponentGeneral";
+	public static final String CHAINING_MODES_KEY = "ChainingModes";
+	public static final String TRUSTED_CERTIFICATES_KEY = "TruestedCertificates";
+	public static final String DEFAULT_BKUS_KEY = "DefaultBKUs";
+	public static final String SLREQUEST_TEMPLATES_KEY = "SLRequestTemplates";
+	public static final String TIMESTAMP_ITEM_KEY = "TimestampItem";
+	public static final String PVP2REFRESH_ITEM_KEY = "Pvp2RefreshItem";
+	public static final String GENERIC_CONFIGURATION_KEY = "GenericConfiguration";
+
+	/**
+	 * Returns all relevant (database-) keys that {@link MOAIDConfiguration} contains.
+	 * @return the keys as {@code String[]}
+	 */
+	public static final String[] getMOAIDConfigurationKeys() {
+		String[] keys = new String[] { AUTH_COMPONENT_GENERAL_KEY, CHAINING_MODES_KEY, TRUSTED_CERTIFICATES_KEY, DEFAULT_BKUS_KEY, SLREQUEST_TEMPLATES_KEY,
+				TIMESTAMP_ITEM_KEY, PVP2REFRESH_ITEM_KEY };
+		return keys;
+	}
+}
diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBRead.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBRead.java
index 29bf02ba9..124a2e46a 100644
--- a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBRead.java
+++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBRead.java
@@ -67,7 +67,7 @@ public class NewConfigurationDBRead {
 		Logger.trace("Get All OnlineApplications from database.");
 
 		// select onlineapplication from OnlineApplication onlineapplication
-		return conf.getList("getOnlineApplications", OnlineApplication.class);
+		return conf.getList(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY, OnlineApplication.class);
 
 	}
 
@@ -104,28 +104,29 @@ public class NewConfigurationDBRead {
 	public static MOAIDConfiguration getMOAIDConfiguration() {
 		Logger.trace("Load MOAID Configuration from database.");
 
-		AuthComponentGeneral authComponent = (AuthComponentGeneral) conf.get("getAuthComponentGeneral",
+		AuthComponentGeneral authComponent = (AuthComponentGeneral) conf.get(MOAIDConfigurationConstants.AUTH_COMPONENT_GENERAL_KEY,
 				AuthComponentGeneral.class);
-		ChainingModes chainingModes = (ChainingModes) conf.get("getChainingModes", ChainingModes.class);
-		List<OnlineApplication> oas = (List<OnlineApplication>) conf.getList("getOnlineApplications",
+
+		ChainingModes chainingModes = (ChainingModes) conf.get(MOAIDConfigurationConstants.CHAINING_MODES_KEY, ChainingModes.class);
+		List<OnlineApplication> oas = (List<OnlineApplication>) conf.getList(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY,
 				OnlineApplication.class);
 		List<GenericConfiguration> genericConfigurations = (List<GenericConfiguration>) conf.getList(
-				"getGenericConfigurations", GenericConfiguration.class);
-		String trustedCaCertificates = (String) conf.get("getTrustedCACertificates", String.class);
-		DefaultBKUs defaultBKUs = (DefaultBKUs) conf.get("getDefaultBKUs", DefaultBKUs.class);
-		SLRequestTemplates slrRequestRemplates = (SLRequestTemplates) conf.get("getSLRequestTemplates",
+				MOAIDConfigurationConstants.GENERIC_CONFIGURATION_KEY, GenericConfiguration.class);
+		String trustedCaCertificates = (String) conf.get(MOAIDConfigurationConstants.TRUSTED_CERTIFICATES_KEY, String.class);
+		DefaultBKUs defaultBKUs = (DefaultBKUs) conf.get(MOAIDConfigurationConstants.DEFAULT_BKUS_KEY, DefaultBKUs.class);
+		SLRequestTemplates slrRequestRemplates = (SLRequestTemplates) conf.get(MOAIDConfigurationConstants.SLREQUEST_TEMPLATES_KEY,
 				SLRequestTemplates.class);
-		Date timeStamp = (Date) conf.get("getTimeStampItem", Date.class);
-		Date pvp2Refresh = (Date) conf.get("getPvp2RefreshItem", Date.class);
-
-		if (authComponent == null || chainingModes == null || trustedCaCertificates == null || defaultBKUs == null
-				|| slrRequestRemplates == null || timeStamp == null || pvp2Refresh == null
-
-		) {
-			// TODO: is there a better approach in case of error?
-			Logger.trace("Not all necessary data available. Create fresh instance.");
-			return new MOAIDConfiguration();
-		}
+		Date timeStamp = (Date) conf.get(MOAIDConfigurationConstants.TIMESTAMP_ITEM_KEY, Date.class);
+		Date pvp2Refresh = (Date) conf.get(MOAIDConfigurationConstants.PVP2REFRESH_ITEM_KEY, Date.class);
+
+		// if (authComponent == null || chainingModes == null || trustedCaCertificates == null || defaultBKUs == null
+		// || slrRequestRemplates == null || timeStamp == null || pvp2Refresh == null
+		//
+		// ) {
+		// // TODO: is there a better approach in case of error?
+		// Logger.trace("Not all necessary data available. Create fresh instance.");
+		// return new MOAIDConfiguration();
+		// }
 
 		// select moaidconfiguration from MOAIDConfiguration moaidconfiguration
 		MOAIDConfiguration result = new MOAIDConfiguration();
diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBWrite.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBWrite.java
new file mode 100644
index 000000000..d8ac55b4e
--- /dev/null
+++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/NewConfigurationDBWrite.java
@@ -0,0 +1,157 @@
+package at.gv.egovernment.moa.id.commons.db;
+
+import java.util.Date;
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import at.gv.egovernment.moa.id.commons.db.dao.config.AuthComponentGeneral;
+import at.gv.egovernment.moa.id.commons.db.dao.config.ChainingModes;
+import at.gv.egovernment.moa.id.commons.db.dao.config.DefaultBKUs;
+import at.gv.egovernment.moa.id.commons.db.dao.config.GenericConfiguration;
+import at.gv.egovernment.moa.id.commons.db.dao.config.MOAIDConfiguration;
+import at.gv.egovernment.moa.id.commons.db.dao.config.OnlineApplication;
+import at.gv.egovernment.moa.id.commons.db.dao.config.SLRequestTemplates;
+import at.gv.egovernment.moa.id.commons.db.dao.config.UserDatabase;
+
+import com.datentechnik.moa.id.conf.persistence.Configuration;
+
+/**
+ * 
+ *
+ */
+@Component
+public class NewConfigurationDBWrite {
+
+	private static Configuration conf;
+	
+	@Autowired(required = true)
+	public void setConfiguration(Configuration conf) {
+			// https://jira.spring.io/browse/SPR-3845
+		NewConfigurationDBWrite.conf = conf;
+	}
+	
+	private static boolean saveAuthComponentGeneral(AuthComponentGeneral dbo) {
+		
+		conf.set(MOAIDConfigurationConstants.AUTH_COMPONENT_GENERAL_KEY, dbo);
+		return true;
+	}
+
+	private static boolean saveChainingModes(ChainingModes dbo) {
+		conf.set(MOAIDConfigurationConstants.CHAINING_MODES_KEY, dbo);
+		return true;
+	}
+
+	private static boolean saveOnlineApplication(OnlineApplication dbo) {
+
+		List<OnlineApplication> storedObjects = conf.getList(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY, OnlineApplication.class);
+		storedObjects.add(dbo);
+		conf.set(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY, storedObjects);
+
+		return true;
+	}
+
+	private static boolean saveGenericConfiguration(GenericConfiguration dbo) {
+		
+		List<GenericConfiguration> storedObjects = conf.getList(MOAIDConfigurationConstants.GENERIC_CONFIGURATION_KEY, GenericConfiguration.class);
+		storedObjects.add(dbo);
+		conf.set(MOAIDConfigurationConstants.GENERIC_CONFIGURATION_KEY, storedObjects);
+		return true;
+	}
+
+	private static boolean saveTrustedCACertificates(String dbo) {
+
+		conf.set(MOAIDConfigurationConstants.TRUSTED_CERTIFICATES_KEY, dbo);
+		return true;
+	}
+
+	private static boolean saveDefaultBKUs(DefaultBKUs dbo) {
+
+		conf.set(MOAIDConfigurationConstants.DEFAULT_BKUS_KEY, dbo);
+		return true;
+	}
+
+	private static boolean saveSLRequestTemplates(SLRequestTemplates dbo) {
+
+		conf.set(MOAIDConfigurationConstants.SLREQUEST_TEMPLATES_KEY, dbo);
+		return true;
+	}
+
+	private static boolean saveTimeStampItem(Date dbo) {
+
+		conf.set(MOAIDConfigurationConstants.TIMESTAMP_ITEM_KEY, dbo);
+		return true;
+	}
+
+	private static boolean savePvp2RefreshItem(Date dbo) {
+
+		conf.set(MOAIDConfigurationConstants.PVP2REFRESH_ITEM_KEY, dbo);
+		return true;
+	}
+
+	/**
+	 * Saves the given list of {@link OnlineApplication} objects to database.
+	 * @param oas the list
+	 * @return {@code true} on success; {@code false} otherwise.
+	 */
+	public static boolean saveOnlineApplications(List<OnlineApplication> oas) {
+
+		conf.set(MOAIDConfigurationConstants.ONLINE_APPLICATIONS_KEY, oas);
+		return true;
+	}
+
+	/**
+	 * Saves the given list of {@link GenericConfiguration} objects to database.
+	 * @param gcs the list
+	 * @return {@code true} on success; {@code false} otherwise.
+	 */
+	public static boolean saveGenericConfigurations(List<GenericConfiguration> gcs) {
+
+		return conf.set(MOAIDConfigurationConstants.GENERIC_CONFIGURATION_KEY, gcs);
+	}
+
+
+	/**
+	 * Saves the given object to database
+	 * @param dbo the object to save
+	 * @return {@code true} on success; {@code false} otherwise.
+	 */
+	public static boolean save(Object dbo) {
+
+		boolean result = false;
+
+		if (dbo instanceof OnlineApplication) {
+
+			result = saveOnlineApplication((OnlineApplication) dbo);
+
+		} else if (dbo instanceof MOAIDConfiguration) {
+
+			MOAIDConfiguration moaconfig = (MOAIDConfiguration) dbo;
+			result = true;
+
+			result &= saveAuthComponentGeneral(moaconfig.getAuthComponentGeneral());
+			result &= saveChainingModes(moaconfig.getChainingModes());
+			result &= saveDefaultBKUs(moaconfig.getDefaultBKUs());
+			result &= saveGenericConfigurations(moaconfig.getGenericConfiguration());
+			result &= savePvp2RefreshItem(moaconfig.getPvp2RefreshItem());
+			result &= saveSLRequestTemplates(moaconfig.getSLRequestTemplates());
+			result &= saveTrustedCACertificates(moaconfig.getTrustedCACertificates());
+			result &= saveTimeStampItem(moaconfig.getTimestampItem());
+
+		} else if (dbo instanceof UserDatabase) {
+			// TODO implement user handling
+		}
+
+		return result;
+	}
+
+	/**
+	 * Deletes the object associated with the given key.
+	 * @param key the key
+	 */
+	public static void delete(String key) {
+		conf.delete(key);
+	}
+
+}
diff --git a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/Configuration.java b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/Configuration.java
index 6ec43c583..43f7d9454 100644
--- a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/Configuration.java
+++ b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/Configuration.java
@@ -27,7 +27,7 @@ public interface Configuration {
 	 * @param key
 	 * @param value
 	 */
-	void set(String key, Object value);
+	boolean set(String key, Object value);
 
 	/**
 	 * 
@@ -45,4 +45,11 @@ public interface Configuration {
 	 * @return
 	 */
 	<T> List<T> getList(String key, Class<T> clazz);
+
+	/**
+	 *
+	 * @param key
+	 * @return
+	 */
+	void delete(String key);
 }
\ No newline at end of file
diff --git a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/ConfigurationImpl.java b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/ConfigurationImpl.java
index 7a52d0c9d..eebecf509 100644
--- a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/ConfigurationImpl.java
+++ b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/ConfigurationImpl.java
@@ -66,7 +66,7 @@ public class ConfigurationImpl implements Configuration {
 	}
 
 	@Override
-	public void set(String key, Object value) {
+	public boolean set(String key, Object value) {
 
 		ConfigProperty keyValue = new ConfigProperty();
 		keyValue.setKey(key);
@@ -74,10 +74,11 @@ public class ConfigurationImpl implements Configuration {
 			keyValue.setValue(mapper.serialize(value));
 			// System.out.println(">> key - value: " + keyValue.getKey() + " - " + keyValue.getValue() + "\n");
 			configPropertyDao.saveProperty(keyValue);
-
+			return true;
 		} catch (JsonProcessingException e) {
 			// TODO do proper error handling
 			e.printStackTrace();
+			return false;
 		}
 
 	}
@@ -98,6 +99,10 @@ public class ConfigurationImpl implements Configuration {
 	public <T> List<T> getList(String key, Class<T> clazz) {
 
 		CollectionType listType = TypeFactory.defaultInstance().constructCollectionType(List.class, clazz);
+
+		if(configPropertyDao.getProperty(key)==null){
+			return new ArrayList<T>();
+		}
 		String json = configPropertyDao.getProperty(key).getValue();
 		ObjectMapper mapper = new ObjectMapper();
 
@@ -120,6 +125,12 @@ public class ConfigurationImpl implements Configuration {
 		return property.getValue();
 	}
 
+	@Override
+	public void delete(String key) {
+		configPropertyDao.delete(key);
+	}
+
+
 	/**
 	 * 
 	 *
@@ -178,4 +189,5 @@ public class ConfigurationImpl implements Configuration {
 
 	};
 
+
 }
diff --git a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDao.java b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDao.java
index a11d23ce8..50dddd745 100644
--- a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDao.java
+++ b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDao.java
@@ -42,4 +42,11 @@ public interface ConfigPropertyDao {
 	 * @param properties The list containing all the properties to be persisted.
 	 */
 	public void saveProperties(Set<ConfigProperty> properties);
+
+	/**
+	 * Deletes the object associated with the given key.
+	 * @param key the key
+	 */
+	public void delete(String key);
+
 }
diff --git a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDaoImpl.java b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDaoImpl.java
index 2b28cb245..752c7dc09 100644
--- a/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDaoImpl.java
+++ b/id/server/moa-id-commons/src/main/java/com/datentechnik/moa/id/conf/persistence/dal/ConfigPropertyDaoImpl.java
@@ -64,12 +64,12 @@ public class ConfigPropertyDaoImpl implements ConfigPropertyDao {
 
 	@Override
 	public List<ConfigProperty> getProperties() {
-		
+
 		if (null == em) {
 			log.error("No EntityManager set!");
 			return null;
 		}
-		
+
 		log.debug("Retrieving all properties from database.");
 		TypedQuery<ConfigProperty> query = em.createQuery("select mc from ConfigProperty mc", ConfigProperty.class);
 		try {
@@ -90,4 +90,14 @@ public class ConfigPropertyDaoImpl implements ConfigPropertyDao {
 		em.flush();
 	}
 
+	@Override
+	public void delete(String key) {
+		log.debug("Deleting entry with key '{}'.", key);
+		try{
+		em.remove(em.find(ConfigProperty.class, key));
+		}catch (IllegalArgumentException e){
+			log.trace("Error while deleting entry with key '{}':" + e.getMessage(), key);
+		}
+	}
+
 }
diff --git a/id/server/moa-id-commons/src/main/resources/configuration.beans.xml b/id/server/moa-id-commons/src/main/resources/configuration.beans.xml
index ee906a407..87cccc7b2 100644
--- a/id/server/moa-id-commons/src/main/resources/configuration.beans.xml
+++ b/id/server/moa-id-commons/src/main/resources/configuration.beans.xml
@@ -25,6 +25,8 @@
 	
 	<bean id="configRead" class="at.gv.egovernment.moa.id.commons.db.NewConfigurationDBRead"/>
 
+	<bean id="configWrite" class="at.gv.egovernment.moa.id.commons.db.NewConfigurationDBWrite"/>
+
 	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" lazy-init="true" destroy-method="close">
 		<aop:scoped-proxy/>
 		<property name="driverClassName" value="${dataSource.driverClassName}" />