Persistence uses now pooled connections and statements.

Kieker.WebGUI/src/main/webapp/WEB-INF/spring-database-config.xml

@@ -7,12 +7,43 @@
                            http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
                            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
 
-    <!-- The database and the transaction manager. -->
-    <bean id="userDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
-        <property name="driverClassName" value="org.apache.derby.jdbc.EmbeddedDriver" />
-        <property name="url" value="jdbc:derby:user;create=true" />
+    <!-- The following code is necessary to create a data source pooling connections and statements. -->
+    <bean id="connectionFactory" class="org.apache.commons.dbcp.DriverManagerConnectionFactory">
+        <constructor-arg index="0" value="jdbc:derby:user;create=true"/>
+        <!-- No further settings -->
+        <constructor-arg index="1">
+            <null/>
+        </constructor-arg>
     </bean>
     
+    <bean id="connectionPool" class="org.apache.commons.pool.impl.GenericObjectPool">
+    </bean>
+    
+    <bean id="statementPool" class="org.apache.commons.pool.impl.GenericKeyedObjectPoolFactory">
+        <constructor-arg index="0">
+            <null/>
+        </constructor-arg>
+    </bean>
+    
+    <bean id="poolableConnectionFactory" class="org.apache.commons.dbcp.PoolableConnectionFactory">
+        <constructor-arg index="0" ref="connectionFactory"/>
+        <constructor-arg index="1" ref="connectionPool"/>
+        <constructor-arg index="2" ref="statementPool"/>
+        <!-- No validation query. -->
+        <constructor-arg index="3">
+            <null/>
+        </constructor-arg>  
+        <!-- Queries are not read only per default. -->
+        <constructor-arg index="4" value="false"/>
+        <!-- Auto comit is activated per default. -->
+        <constructor-arg index="5" value="true"/>
+    </bean>
+    
+    <bean id="userDataSource" class="org.apache.commons.dbcp.PoolingDataSource">
+        <property name="pool" ref="connectionPool"/>
+    </bean>    
+    
+    <!-- Configure a transaction manager for the data source. -->
     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <property name="dataSource" ref="userDataSource" />
     </bean>