/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.karaf.jaas.modules.jdbc;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import javax.naming.InitialContext;
import javax.sql.DataSource;
public final class JDBCUtils {
public static final String DATASOURCE = "datasource";
public static final String JNDI = "jndi:";
public static final String OSGI = "osgi:";
private JDBCUtils() { }
/**
* Look up a datasource from the url. The datasource can be passed either as jndi name or bundles ldap filter.
*
* @param bc the bundle context.
* @param url the datasource URL.
* @return the {@link DataSource} object.
* @throws Exception in case of datasource creation failure.
*/
public static DataSource createDatasource(BundleContext bc, String url) throws Exception {
Object ds = doCreateDatasource(bc, url);
if (ds == null) {
throw new Exception("Unable to create datasource for " + url);
}
return DataSource.class.cast(ds);
}
protected static Object doCreateDatasource(BundleContext bc, String url) throws Exception {
url = (url != null) ? url.trim() : null;
if (url == null || url.isEmpty()) {
throw new Exception("Illegal datasource url format. Datasource URL cannot be null or empty.");
} else if (url.startsWith(JNDI)) {
String jndiName = url.substring(JNDI.length());
InitialContext ic = new InitialContext();
try {
return ic.lookup(jndiName);
} finally {
ic.close();
}
} else if (url.startsWith(OSGI)) {
String osgiFilter = url.substring(OSGI.length());
String clazz = null;
String filter = null;
String[] tokens = osgiFilter.split("/", 2);
if (tokens.length > 0) {
clazz = tokens[0];
}
if (tokens.length > 1) {
filter = tokens[1];
}
ServiceReference[] references = bc.getServiceReferences(clazz, filter);
if (references != null) {
ServiceReference ref = references[0];
Object ds = bc.getService(ref);
bc.ungetService(ref);
return ds;
} else {
throw new Exception("Unable to find service reference for datasource: " + clazz + "/" + filter);
}
} else {
throw new Exception("Illegal datasource url format " + url);
}
}
protected static int rawUpdate(DataSource dataSource, String query, String... params) throws SQLException {
try (Connection connection = dataSource.getConnection()) {
try (PreparedStatement statement = connection.prepareStatement(query)) {
for (int i = 0; i < params.length; i++) {
statement.setString(i + 1, params[i]);
}
int res = statement.executeUpdate();
if (!connection.getAutoCommit()) {
connection.commit();
}
return res;
}
}
}
protected static int rawUpdate(Connection connection, String query, String... params) throws SQLException {
try (PreparedStatement statement = connection.prepareStatement(query)) {
for (int i = 0; i < params.length; i++) {
statement.setString(i + 1, params[i]);
}
return statement.executeUpdate();
}
}
protected static List<String> rawSelect(DataSource dataSource, String query, String... params) throws SQLException {
try (Connection connection = dataSource.getConnection()) {
return rawSelect(connection, query, params);
}
}
protected static List<String> rawSelect(Connection connection, String query, String... params) throws SQLException {
List<String> results = new ArrayList<>();
try (PreparedStatement statement = connection.prepareStatement(query)) {
for (int i = 0; i < params.length; i++) {
statement.setString(i + 1, params[i]);
}
try (ResultSet resultSet = statement.executeQuery()) {
while (resultSet.next()) {
results.add(resultSet.getString(1));
}
}
}
return results;
}
}