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Commons Database Connection Pooling (See PATCHES.TXT in jar)
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/*
* 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.commons.dbcp;
import java.io.ByteArrayInputStream;
import java.sql.Connection;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Collections;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
import javax.sql.DataSource;
/**
* JNDI object factory that creates an instance of
* BasicDataSource that has been configured based on the
* RefAddr values of the specified Reference,
* which must match the names and data types of the
* BasicDataSource bean properties.
*
* @author Craig R. McClanahan
* @author Dirk Verbeeck
* @version $Revision: 828639 $ $Date: 2009-10-22 06:27:43 -0400 (Thu, 22 Oct 2009) $
*/
public class BasicDataSourceFactory implements ObjectFactory {
private final static String PROP_DEFAULTAUTOCOMMIT = "defaultAutoCommit";
private final static String PROP_DEFAULTREADONLY = "defaultReadOnly";
private final static String PROP_DEFAULTTRANSACTIONISOLATION = "defaultTransactionIsolation";
private final static String PROP_DEFAULTCATALOG = "defaultCatalog";
private final static String PROP_DRIVERCLASSNAME = "driverClassName";
private final static String PROP_MAXACTIVE = "maxActive";
private final static String PROP_MAXIDLE = "maxIdle";
private final static String PROP_MINIDLE = "minIdle";
private final static String PROP_INITIALSIZE = "initialSize";
private final static String PROP_MAXWAIT = "maxWait";
private final static String PROP_TESTONBORROW = "testOnBorrow";
private final static String PROP_TESTONRETURN = "testOnReturn";
private final static String PROP_TIMEBETWEENEVICTIONRUNSMILLIS = "timeBetweenEvictionRunsMillis";
private final static String PROP_NUMTESTSPEREVICTIONRUN = "numTestsPerEvictionRun";
private final static String PROP_MINEVICTABLEIDLETIMEMILLIS = "minEvictableIdleTimeMillis";
private final static String PROP_TESTWHILEIDLE = "testWhileIdle";
private final static String PROP_PASSWORD = "password";
private final static String PROP_URL = "url";
private final static String PROP_USERNAME = "username";
private final static String PROP_VALIDATIONQUERY = "validationQuery";
private final static String PROP_VALIDATIONQUERY_TIMEOUT = "validationQueryTimeout";
/**
* The property name for initConnectionSqls.
* The associated value String must be of the form [query;]*
* @since 1.3
*/
private final static String PROP_INITCONNECTIONSQLS = "initConnectionSqls";
private final static String PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED = "accessToUnderlyingConnectionAllowed";
private final static String PROP_REMOVEABANDONED = "removeAbandoned";
private final static String PROP_REMOVEABANDONEDTIMEOUT = "removeAbandonedTimeout";
private final static String PROP_LOGABANDONED = "logAbandoned";
private final static String PROP_POOLPREPAREDSTATEMENTS = "poolPreparedStatements";
private final static String PROP_MAXOPENPREPAREDSTATEMENTS = "maxOpenPreparedStatements";
private final static String PROP_CONNECTIONPROPERTIES = "connectionProperties";
private final static String[] ALL_PROPERTIES = {
PROP_DEFAULTAUTOCOMMIT,
PROP_DEFAULTREADONLY,
PROP_DEFAULTTRANSACTIONISOLATION,
PROP_DEFAULTCATALOG,
PROP_DRIVERCLASSNAME,
PROP_MAXACTIVE,
PROP_MAXIDLE,
PROP_MINIDLE,
PROP_INITIALSIZE,
PROP_MAXWAIT,
PROP_TESTONBORROW,
PROP_TESTONRETURN,
PROP_TIMEBETWEENEVICTIONRUNSMILLIS,
PROP_NUMTESTSPEREVICTIONRUN,
PROP_MINEVICTABLEIDLETIMEMILLIS,
PROP_TESTWHILEIDLE,
PROP_PASSWORD,
PROP_URL,
PROP_USERNAME,
PROP_VALIDATIONQUERY,
PROP_VALIDATIONQUERY_TIMEOUT,
PROP_INITCONNECTIONSQLS,
PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED,
PROP_REMOVEABANDONED,
PROP_REMOVEABANDONEDTIMEOUT,
PROP_LOGABANDONED,
PROP_POOLPREPAREDSTATEMENTS,
PROP_MAXOPENPREPAREDSTATEMENTS,
PROP_CONNECTIONPROPERTIES
};
// -------------------------------------------------- ObjectFactory Methods
/**
* Create and return a new BasicDataSource instance. If no
* instance can be created, return null instead.
*
* @param obj The possibly null object containing location or
* reference information that can be used in creating an object
* @param name The name of this object relative to nameCtx
* @param nameCtx The context relative to which the name
* parameter is specified, or null if name
* is relative to the default initial context
* @param environment The possibly null environment that is used in
* creating this object
*
* @exception Exception if an exception occurs creating the instance
*/
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
Hashtable environment)
throws Exception {
// We only know how to deal with javax.naming.References
// that specify a class name of "javax.sql.DataSource"
if ((obj == null) || !(obj instanceof Reference)) {
return null;
}
Reference ref = (Reference) obj;
if (!"javax.sql.DataSource".equals(ref.getClassName())) {
return null;
}
Properties properties = new Properties();
for (int i = 0 ; i < ALL_PROPERTIES.length ; i++) {
String propertyName = ALL_PROPERTIES[i];
RefAddr ra = ref.get(propertyName);
if (ra != null) {
String propertyValue = ra.getContent().toString();
properties.setProperty(propertyName, propertyValue);
}
}
return createDataSource(properties);
}
/**
* Creates and configures a {@link BasicDataSource} instance based on the
* given properties.
*
* @param properties the datasource configuration properties
* @throws Exception if an error occurs creating the data source
*/
public static DataSource createDataSource(Properties properties) throws Exception {
BasicDataSource dataSource = new BasicDataSource();
String value = null;
value = properties.getProperty(PROP_DEFAULTAUTOCOMMIT);
if (value != null) {
dataSource.setDefaultAutoCommit(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_DEFAULTREADONLY);
if (value != null) {
dataSource.setDefaultReadOnly(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_DEFAULTTRANSACTIONISOLATION);
if (value != null) {
int level = PoolableConnectionFactory.UNKNOWN_TRANSACTIONISOLATION;
if ("NONE".equalsIgnoreCase(value)) {
level = Connection.TRANSACTION_NONE;
}
else if ("READ_COMMITTED".equalsIgnoreCase(value)) {
level = Connection.TRANSACTION_READ_COMMITTED;
}
else if ("READ_UNCOMMITTED".equalsIgnoreCase(value)) {
level = Connection.TRANSACTION_READ_UNCOMMITTED;
}
else if ("REPEATABLE_READ".equalsIgnoreCase(value)) {
level = Connection.TRANSACTION_REPEATABLE_READ;
}
else if ("SERIALIZABLE".equalsIgnoreCase(value)) {
level = Connection.TRANSACTION_SERIALIZABLE;
}
else {
try {
level = Integer.parseInt(value);
} catch (NumberFormatException e) {
System.err.println("Could not parse defaultTransactionIsolation: " + value);
System.err.println("WARNING: defaultTransactionIsolation not set");
System.err.println("using default value of database driver");
level = PoolableConnectionFactory.UNKNOWN_TRANSACTIONISOLATION;
}
}
dataSource.setDefaultTransactionIsolation(level);
}
value = properties.getProperty(PROP_DEFAULTCATALOG);
if (value != null) {
dataSource.setDefaultCatalog(value);
}
value = properties.getProperty(PROP_DRIVERCLASSNAME);
if (value != null) {
dataSource.setDriverClassName(value);
}
value = properties.getProperty(PROP_MAXACTIVE);
if (value != null) {
dataSource.setMaxActive(Integer.parseInt(value));
}
value = properties.getProperty(PROP_MAXIDLE);
if (value != null) {
dataSource.setMaxIdle(Integer.parseInt(value));
}
value = properties.getProperty(PROP_MINIDLE);
if (value != null) {
dataSource.setMinIdle(Integer.parseInt(value));
}
value = properties.getProperty(PROP_INITIALSIZE);
if (value != null) {
dataSource.setInitialSize(Integer.parseInt(value));
}
value = properties.getProperty(PROP_MAXWAIT);
if (value != null) {
dataSource.setMaxWait(Long.parseLong(value));
}
value = properties.getProperty(PROP_TESTONBORROW);
if (value != null) {
dataSource.setTestOnBorrow(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_TESTONRETURN);
if (value != null) {
dataSource.setTestOnReturn(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_TIMEBETWEENEVICTIONRUNSMILLIS);
if (value != null) {
dataSource.setTimeBetweenEvictionRunsMillis(Long.parseLong(value));
}
value = properties.getProperty(PROP_NUMTESTSPEREVICTIONRUN);
if (value != null) {
dataSource.setNumTestsPerEvictionRun(Integer.parseInt(value));
}
value = properties.getProperty(PROP_MINEVICTABLEIDLETIMEMILLIS);
if (value != null) {
dataSource.setMinEvictableIdleTimeMillis(Long.parseLong(value));
}
value = properties.getProperty(PROP_TESTWHILEIDLE);
if (value != null) {
dataSource.setTestWhileIdle(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_PASSWORD);
if (value != null) {
dataSource.setPassword(value);
}
value = properties.getProperty(PROP_URL);
if (value != null) {
dataSource.setUrl(value);
}
value = properties.getProperty(PROP_USERNAME);
if (value != null) {
dataSource.setUsername(value);
}
value = properties.getProperty(PROP_VALIDATIONQUERY);
if (value != null) {
dataSource.setValidationQuery(value);
}
value = properties.getProperty(PROP_VALIDATIONQUERY_TIMEOUT);
if (value != null) {
dataSource.setValidationQueryTimeout(Integer.parseInt(value));
}
value = properties.getProperty(PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED);
if (value != null) {
dataSource.setAccessToUnderlyingConnectionAllowed(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_REMOVEABANDONED);
if (value != null) {
dataSource.setRemoveAbandoned(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_REMOVEABANDONEDTIMEOUT);
if (value != null) {
dataSource.setRemoveAbandonedTimeout(Integer.parseInt(value));
}
value = properties.getProperty(PROP_LOGABANDONED);
if (value != null) {
dataSource.setLogAbandoned(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_POOLPREPAREDSTATEMENTS);
if (value != null) {
dataSource.setPoolPreparedStatements(Boolean.valueOf(value).booleanValue());
}
value = properties.getProperty(PROP_MAXOPENPREPAREDSTATEMENTS);
if (value != null) {
dataSource.setMaxOpenPreparedStatements(Integer.parseInt(value));
}
value = properties.getProperty(PROP_INITCONNECTIONSQLS);
if (value != null) {
StringTokenizer tokenizer = new StringTokenizer(value, ";");
dataSource.setConnectionInitSqls(Collections.list(tokenizer));
}
value = properties.getProperty(PROP_CONNECTIONPROPERTIES);
if (value != null) {
Properties p = getProperties(value);
Enumeration e = p.propertyNames();
while (e.hasMoreElements()) {
String propertyName = (String) e.nextElement();
dataSource.addConnectionProperty(propertyName, p.getProperty(propertyName));
}
}
// DBCP-215
// Trick to make sure that initialSize connections are created
if (dataSource.getInitialSize() > 0) {
dataSource.getLogWriter();
}
// Return the configured DataSource instance
return dataSource;
}
/**
* Parse properties from the string. Format of the string must be [propertyName=property;]*
* @param propText
* @return Properties
* @throws Exception
*/
static private Properties getProperties(String propText) throws Exception {
Properties p = new Properties();
if (propText != null) {
p.load(new ByteArrayInputStream(propText.replace(';', '\n').getBytes()));
}
return p;
}
}