+/*
+ * Copyright 2005-2010 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
package org.wamblee.support.persistence;
import javax.sql.DataSource;
import org.apache.commons.pool.impl.GenericObjectPool;
public abstract class AbstractDatabase implements Database {
- private static final int CONNECTION_POOL_SIZE = 16;
+ private static final int CONNECTION_POOL_SIZE = 16;
- private DataSource itsDataSource;
-
- private boolean started;
-
- protected AbstractDatabase() {
- started = false;
- }
-
- protected abstract void doStart();
-
- protected abstract void doStop();
-
- /**
- * This method must be called from the start method.
- */
- protected final void createDataSource() {
- GenericObjectPool connectionPool = new GenericObjectPool(null);
- connectionPool.setMaxActive(CONNECTION_POOL_SIZE);
- ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(getJdbcUrl(), getUsername(), getPassword());
- // The following line must be kept in although it does not appear to be used, the constructor regsiters the
- // constructed object at the connection pool.
- PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory,connectionPool,null,null,false,true);
- itsDataSource = new PoolingDataSource(connectionPool);
- }
-
-
- /// BELOW THIS LINE IS NOT OF INTEREST TO SUBCLASSES.
-
- public final DataSource start() {
- if ( started ) {
- throw new RuntimeException("Database already started");
- }
- started = true;
- doStart();
- return getDatasource();
- }
-
- public final void stop() {
- if ( ! started ) {
- return; // nothing to do.
- }
- started = false;
- doStop();
- }
+ private DataSource itsDataSource;
- private final DataSource getDatasource() {
- if ( !started) {
- throw new RuntimeException("Database is not started!");
- }
- return itsDataSource;
- }
-
- protected String getProperty(String aName) {
- String value = System.getProperty(aName);
- if ( value != null ) {
- return value;
- }
- value = System.getenv(aName);
- if ( value != null ) {
- return value;
- }
- throw new RuntimeException("This class expects the '" + aName + "' property to be set");
- }
+ private boolean started;
+
+ protected AbstractDatabase() {
+ started = false;
+ }
+
+ protected abstract void doStart();
+
+ protected abstract void doStop();
+
+ /**
+ * This method must be called from the start method.
+ */
+ protected final void createDataSource() {
+ GenericObjectPool connectionPool = new GenericObjectPool(null);
+ connectionPool.setMaxActive(CONNECTION_POOL_SIZE);
+ ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
+ getJdbcUrl(), getUsername(), getPassword());
+ // The following line must be kept in although it does not appear to be
+ // used, the constructor regsiters the
+ // constructed object at the connection pool.
+ PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(
+ connectionFactory, connectionPool, null, null, false, true);
+ ingoredVariable(poolableConnectionFactory);
+ itsDataSource = new PoolingDataSource(connectionPool);
+ }
+
+ private static void ingoredVariable(PoolableConnectionFactory aFactory) {
+ // Empty
+ }
+
+ // / BELOW THIS LINE IS NOT OF INTEREST TO SUBCLASSES.
+
+ public final DataSource start() {
+ if (started) {
+ throw new RuntimeException("Database already started");
+ }
+ started = true;
+ doStart();
+ return getDatasource();
+ }
+
+ public final void stop() {
+ if (!started) {
+ return; // nothing to do.
+ }
+ started = false;
+ doStop();
+ }
+
+ private final DataSource getDatasource() {
+ if (!started) {
+ throw new RuntimeException("Database is not started!");
+ }
+ return itsDataSource;
+ }
+
+ protected String getProperty(String aName) {
+ String value = System.getProperty(aName);
+ if (value != null) {
+ return value;
+ }
+ value = System.getenv(aName);
+ if (value != null) {
+ return value;
+ }
+ throw new RuntimeException("This class expects the '" + aName +
+ "' property to be set");
+ }
}