org.objectstyle.cayenne.conf.DBCPDataSourceFactory Maven / Gradle / Ivy
/* ====================================================================
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
*
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if any,
* must include the following acknowlegement:
* "This product includes software developed by independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, email
* "andrus at objectstyle dot org".
*
* 5. Products derived from this software may not be called "ObjectStyle"
* or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
*
*
*
*
*
*
* #
* # This file defines the configuration properties for Commons DBCP pool
* # which is used for Cayenne during some of the test cases.
* # For more info on setting parameters see the documentation for commons
* # dbcp and commons pool. The following prefixes are required:
* # cayenne.dbcp.<param> = configure the connection pool
* # cayenne.dbcp.ps.<param> = configuration for the prepared connection pools
* # that are associated with each pooled connections
*
*
* #driver class to use to connect to the database
* cayenne.dbcp.driverClassName=net.sourceforge.jtds.jdbc.Driver
*
* #url to the database, the parameters should be part of the connection string
* #and not here
* cayenne.dbcp.url=jdbc:jtds:sqlserver://192.168.20.2:1433/x_test2;TDS=8.0
*
* #username to use to connect to the database
* cayenne.dbcp.username=garyj
*
* #password to use to connect to the database
* cayenne.dbcp.password=somepass
*
* #maximum number of active connections
* cayenne.dbcp.maxActive=500
*
* #minimum number of idle connections
* cayenne.dbcp.minIdle=10
*
* #maximum number of active connections that can remain idle in the pool
* cayenne.dbcp.maxIdle=10
*
* #maximum number of milliseconds to wait for a connection to be returned to the
* #pool before throwing an exception when the connection is required and the pool
* #is exhaused of the active connections. -1 for indefinetly
* cayenne.dbcp.maxWait=10000
*
* #sql query to be used to validate connections from the pool. Must return
* #at least one row
* cayenne.dbcp.validationQuery=SELECT GETDATE()
*
* #should the object be validated when it is borrowed from the pool
* cayenne.dbcp.testOnBorrow=false
*
* #should the object be validated when it is returned to the pool
* cayenne.dbcp.testOnReturn=true
*
* #should the object be validated when it is idle
* cayenne.dbcp.testWhileIdle=true
*
* #number of milliseconds to sleep between runs of the idle object evictor thread
* cayenne.dbcp.timeBetweenEvictionRunsMillis=120000
*
*
* #number of objects to examin during each run of the idle object evictor
* cayenne.dbcp.numTestsPerEvictionRun=10
*
* #minimum time an object may sit idle in the pool before it is elegible for
* #an eviction
* cayenne.dbcp.minEvictableIdleTimeMillis=2000000
*
* #action to take the the pool is exhausted of all active connections
* #see GenericObjectPool class
* #this value can be set as either an int or a String the setter method
* #will attempt to convert the String value to it's resective representation
* #in the GenericObjectPool class and if successfull will use the byte
* #value as the config paramter to the pool. If not the default value will
* #be used
* cayenne.dbcp.whenExhaustedAction=WHEN_EXHAUSTED_GROW
*
* #The default auto-commit state of connections created by this pool
* caynne.dbcp.defaultAutoCommit=false
*
* #Default read only state of connections created by the pool. Can be left
* #as null for driver default
* cayenne.dbcp.defaultReadOnly=true
*
*
* # Default TransactionIsolation state of connections created by this pool. This can
* # be either a String representation of the isolation level defined in the interface
* # java.sql.Connection. Can be left as null for
* # driver default
* cayenne.dbcp.defaultTransactionIsolation=TRANSACTION_SERIALIZABLE
*
* #If set to true the application will be able to get access to the
* #actual connection object which is normally wrapped by a poolable connections
* cayenne.dbcp.accessToUnderlyingConnectionAllowed=true
*
* #Default catalog of connections created by this pool
* cayenne.dbcp.defaultCatalog=someCat
*
* #Specifies whether prepared statments should be pooled
* cayenne.dbcp.poolPreparedStatements=true
*
*
* #Controlls the maximum number of objects that can be borrowed from the pool at
* #one time
* cayenne.dbcp.ps.maxActive=500
*
* #Maximum number of idle objects in the pool
* cayenne.dbcp.ps.maxIdle=50
*
* #Maximum number of objects that can exist in the prepared statement pool at one time
* cayenne.dbcp.ps.maxTotal=600
*
*
* # Minimum number of milliseconds to wait for an objec the the pool of
* # prepared statements is exhausted and the whenExhaustedAction is set to
* # 1 (WHEN_EXHAUSTED_BLOCK)
* cayenne.dbcp.ps.maxWait=10000
*
*
* # Number of milliseconds an object can sit idle in the pool before it is
* # elegible for eviction
* cayenne.dbcp.ps.minEvictableIdleTimeMillis=2000000
*
*
* #Number of idle objects that should be examined per eviction run
* cayenne.dbcp.ps.numTestsPerEvictionRun=20
*
*
* #Specifies whether objects should be validated before they are borrowed from this pool
* cayenne.dbcp.ps.testOnBorrow=false
*
* #Specifies whether objects should be validated when they are returned to the pool
* cayenne.dbcp.ps.testOnReturn=true
*
*
* #Specifies whether objects should be validated in the idle eviction thread
* cayenne.dbcp.ps.testWhileIdle=true
*
* #Specifies the time between the runs of the eviction thread
* cayenne.dbcp.ps.timeBetweenEvictionRunsMillis=120000
*
* # action to take when the the pool is exhausted of all active objects.
* # acceptable values are strings (WHEN_EXHAUSTED_FAIL, WHEN_EXHAUSTED_BLOCK (default),
* # WHEN_EXHAUSTED_GROW), or their corresponding int values defined in commons-pool GenericObjectPool:
* cayenne.dbcp.ps.whenExhaustedAction=WHEN_EXHAUSTED_FAIL
*
*
*
*
*
*
*
* @since 1.2
* @author Gary Jarrel
*/
public class DBCPDataSourceFactory implements DataSourceFactory {
private static final Logger logger = Logger.getLogger(DBCPDataSourceFactory.class);
/**
* Suffix of the properties file
*/
private static final String SUFFIX = ".properties";
/**
* All the properties in the configuration properties file should be prefixed with
* this prefix, namely cayenne.dbcp. The config parameter as set out in commons dbcp
* configuration should follow this prefix.
*/
public static final String PROPERTY_PREFIX = "cayenne.dbcp.";
/**
* The the properties in the configuration file, related to Prepared Statement pooling
* and used to configure KeyedObjectPoolFactory are followed by this
* prefix. This constants is set to PROPERTY_PREFIX + ps.
*/
public static final String PS_PROPERTY_PREFIX = PROPERTY_PREFIX + "ps.";
protected Configuration parentConfiguration;
public void initializeWithParentConfiguration(Configuration parentConfiguration) {
this.parentConfiguration = parentConfiguration;
}
/**
* @deprecated since 1.2
*/
public DataSource getDataSource(String location, Level logLevel) throws Exception {
return getDataSource(location);
}
/**
* Creates a DBCP PoolingDataSource
*
* @return DataSource which is an instance of
* PoolingDataSource
* @throws Exception
*/
public DataSource getDataSource(String location) throws Exception {
if (!location.endsWith(SUFFIX)) {
location = location.concat(SUFFIX);
}
logger.info("Loading DBCP properties from " + location);
Properties properties = loadProperties(location);
logger.info("Loaded DBCP properties: " + properties);
loadDriverClass(properties);
// build and assemble parts of DBCP DataSource...
ConnectionFactory factory = createConnectionFactory(properties);
KeyedObjectPoolFactory statementPool = createStatementPool(properties);
GenericObjectPool.Config config = createPoolConfig(properties);
// PoolableConnectionFactory properties
String validationQuery = stringProperty(properties, "validationQuery");
boolean defaultReadOnly = booleanProperty(properties, "defaultReadOnly", false);
boolean defaultAutoCommit = booleanProperty(
properties,
"defaultAutoCommit",
false);
int defaultTransactionIsolation = defaultTransactionIsolation(
properties,
"defaultTransactionIsolation",
Connection.TRANSACTION_SERIALIZABLE);
String defaultCatalog = stringProperty(properties, "defaultCatalog");
// a side effect of PoolableConnectionFactory constructor call is that newly
// created factory object is assigned to "connectionPool", which is definitely a
// very confusing part of DBCP - new object is not visibly assigned to anything,
// still it is preserved...
ObjectPool connectionPool = new GenericObjectPool(null, config);
new PoolableConnectionFactory(
factory,
connectionPool,
statementPool,
validationQuery,
defaultReadOnly ? Boolean.TRUE : Boolean.FALSE,
defaultAutoCommit,
defaultTransactionIsolation,
defaultCatalog,
null);
PoolingDataSource dataSource = new PoolingDataSource(connectionPool);
dataSource.setAccessToUnderlyingConnectionAllowed(booleanProperty(
properties,
"accessToUnderlyingConnectionAllowed",
false));
return dataSource;
}
/**
* Loads driver class into driver manager.
*/
void loadDriverClass(Properties properties) throws Exception {
String driver = stringProperty(properties, "driverClassName");
logger.info("loading JDBC driver class: " + driver);
if (driver == null) {
throw new NullPointerException("No value for required property: "
+ PROPERTY_PREFIX
+ "driverClassName");
}
Class.forName(driver);
}
KeyedObjectPoolFactory createStatementPool(Properties properties) throws Exception {
if (!booleanProperty(properties, "poolPreparedStatements", false)) {
return null;
}
// the GenericKeyedObjectPool.Config object isn't used because
// although it has provision for the maxTotal parameter when
// passed to the GenericKeyedObjectPoolFactory constructor
// this parameter is not being properly set as a default for
// creating prepared statement pools
int maxActive = intProperty(
properties,
"ps.maxActive",
GenericObjectPool.DEFAULT_MAX_ACTIVE);
byte whenExhaustedAction = whenExhaustedAction(
properties,
"ps.whenExhaustedAction",
GenericObjectPool.DEFAULT_WHEN_EXHAUSTED_ACTION);
long maxWait = longProperty(
properties,
"ps.maxWait",
GenericObjectPool.DEFAULT_MAX_WAIT);
int maxIdle = intProperty(
properties,
"ps.maxIdle",
GenericObjectPool.DEFAULT_MAX_IDLE);
int maxTotal = intProperty(properties, "ps.maxTotal", 1);
boolean testOnBorrow = booleanProperty(
properties,
"ps.testOnBorrow",
GenericObjectPool.DEFAULT_TEST_ON_BORROW);
boolean testOnReturn = booleanProperty(
properties,
"ps.testOnReturn",
GenericObjectPool.DEFAULT_TEST_ON_RETURN);
long timeBetweenEvictionRunsMillis = longProperty(
properties,
"ps.timeBetweenEvictionRunsMillis",
GenericObjectPool.DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS);
int numTestsPerEvictionRun = intProperty(
properties,
"ps.numTestsPerEvictionRun",
GenericObjectPool.DEFAULT_NUM_TESTS_PER_EVICTION_RUN);
long minEvictableIdleTimeMillis = longProperty(
properties,
"ps.minEvictableIdleTimeMillis",
GenericObjectPool.DEFAULT_MIN_EVICTABLE_IDLE_TIME_MILLIS);
boolean testWhileIdle = booleanProperty(
properties,
"ps.testWhileIdle",
GenericObjectPool.DEFAULT_TEST_WHILE_IDLE);
return new GenericKeyedObjectPoolFactory(
null,
maxActive,
whenExhaustedAction,
maxWait,
maxIdle,
maxTotal,
testOnBorrow,
testOnReturn,
timeBetweenEvictionRunsMillis,
numTestsPerEvictionRun,
minEvictableIdleTimeMillis,
testWhileIdle);
}
ConnectionFactory createConnectionFactory(Properties properties) {
String url = stringProperty(properties, "url");
String userName = stringProperty(properties, "username");
String password = stringProperty(properties, "password");
// sanity check
if (url == null) {
throw new NullPointerException("No value for required property: "
+ PROPERTY_PREFIX
+ "url");
}
return new DriverManagerConnectionFactory(url, userName, password);
}
GenericObjectPool.Config createPoolConfig(Properties properties) throws Exception {
GenericObjectPool.Config config = new GenericObjectPool.Config();
config.maxIdle = intProperty(
properties,
"maxIdle",
GenericObjectPool.DEFAULT_MAX_IDLE);
config.minIdle = intProperty(
properties,
"minIdle",
GenericObjectPool.DEFAULT_MIN_IDLE);
config.maxActive = intProperty(
properties,
"maxActive",
GenericObjectPool.DEFAULT_MAX_ACTIVE);
config.maxWait = longProperty(
properties,
"maxWait",
GenericObjectPool.DEFAULT_MAX_WAIT);
config.testOnBorrow = booleanProperty(
properties,
"testOnBorrow",
GenericObjectPool.DEFAULT_TEST_ON_BORROW);
config.testOnReturn = booleanProperty(
properties,
"testOnReturn",
GenericObjectPool.DEFAULT_TEST_ON_RETURN);
config.testWhileIdle = booleanProperty(
properties,
"testWhileIdle",
GenericObjectPool.DEFAULT_TEST_WHILE_IDLE);
config.timeBetweenEvictionRunsMillis = longProperty(
properties,
"timeBetweenEvictionRunsMillis",
GenericObjectPool.DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS);
config.numTestsPerEvictionRun = intProperty(
properties,
"numTestsPerEvictionRun",
GenericObjectPool.DEFAULT_NUM_TESTS_PER_EVICTION_RUN);
config.minEvictableIdleTimeMillis = longProperty(
properties,
"minEvictableIdleTimeMillis",
GenericObjectPool.DEFAULT_MIN_EVICTABLE_IDLE_TIME_MILLIS);
config.whenExhaustedAction = whenExhaustedAction(
properties,
"whenExhaustedAction",
GenericObjectPool.DEFAULT_WHEN_EXHAUSTED_ACTION);
return config;
}
Properties loadProperties(String location) throws IOException {
Properties properties = new Properties();
InputStream in = getInputStream(location);
if (in == null) {
throw new ConfigurationException("DBCP properties file not found: "
+ location);
}
try {
properties.load(in);
}
finally {
try {
in.close();
}
catch (IOException ignore) {
}
}
return properties;
}
int defaultTransactionIsolation(
Properties properties,
String property,
int defaultValue) {
String value = stringProperty(properties, property);
if (value == null) {
return defaultValue;
}
// try int...
try {
return Integer.parseInt(value);
}
catch (NumberFormatException nfex) {
// try symbolic
try {
return Connection.class.getField(value).getInt(null);
}
catch (Throwable th) {
throw new ConfigurationException(
"Invalid 'defaultTransactionIsolation': " + value);
}
}
}
byte whenExhaustedAction(Properties properties, String property, byte defaultValue)
throws Exception {
String value = stringProperty(properties, property);
if (value == null) {
return defaultValue;
}
// try byte...
try {
return Byte.parseByte(value);
}
catch (NumberFormatException nfex) {
// try symbolic
try {
return GenericObjectPool.class.getField(value).getByte(null);
}
catch (Throwable th) {
throw new ConfigurationException("Invalid 'whenExhaustedAction': "
+ value);
}
}
}
String stringProperty(Properties properties, String property) {
return properties.getProperty(PROPERTY_PREFIX + property);
}
boolean booleanProperty(Properties properties, String property, boolean defaultValue) {
String value = stringProperty(properties, property);
return (value != null) ? "true".equalsIgnoreCase(stringProperty(
properties,
property)) : defaultValue;
}
int intProperty(Properties properties, String property, int defaultValue) {
String value = stringProperty(properties, property);
try {
return (value != null) ? Integer.parseInt(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
long longProperty(Properties properties, String property, long defaultValue) {
String value = stringProperty(properties, property);
try {
return (value != null) ? Long.parseLong(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
byte byteProperty(Properties properties, String property, byte defaultValue) {
String value = stringProperty(properties, property);
try {
return (value != null) ? Byte.parseByte(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
/**
* Returns an input stream for the file corresponding to location.
*/
InputStream getInputStream(String location) {
if (this.parentConfiguration == null) {
throw new ConfigurationException(
"No parent Configuration set - cannot continue.");
}
return this.parentConfiguration.getResourceLocator().findResourceStream(location);
}
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