org.apache.commons.dbcp.datasources
Class PerUserPoolDataSource

java.lang.Object
  org.apache.commons.dbcp.datasources.InstanceKeyDataSource
      org.apache.commons.dbcp.datasources.PerUserPoolDataSource

All Implemented Interfaces:

Serializable, Wrapper, Referenceable, CommonDataSource, DataSource

public class PerUserPoolDataSource
extends InstanceKeyDataSource

A pooling DataSource appropriate for deployment within J2EE environment. There are many configuration options, most of which are defined in the parent class. This datasource uses individual pools per user, and some properties can be set specifically for a given user, if the deployment environment can support initialization of mapped properties. So for example, a pool of admin or write-access Connections can be guaranteed a certain number of connections, separate from a maximum set for users with read-only connections.

User passwords can be changed without re-initializing the datasource. When a getConnection(username, password) request is processed with a password that is different from those used to create connections in the pool associated with username, an attempt is made to create a new connection using the supplied password and if this succeeds, the existing pool is cleared and a new pool is created for connections using the new password.

Version:

$Revision: 907288 $ $Date: 2010-02-06 14:42:58 -0500 (Sat, 06 Feb 2010) $

Author:

John D. McNally

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.commons.dbcp.datasources.InstanceKeyDataSource

instanceKey, UNKNOWN_TRANSACTIONISOLATION

Constructor Summary

PerUserPoolDataSource()
Default no-arg constructor for Serialization

Method Summary

void	close() Close pool(s) being maintained by this datasource.
protected org.apache.commons.dbcp.datasources.PooledConnectionManager	getConnectionManager(org.apache.commons.dbcp.datasources.UserPassKey upkey)
int	getDefaultMaxActive() The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit.
int	getDefaultMaxIdle() The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit.
int	getDefaultMaxWait() The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely.
int	getNumActive() Get the number of active connections in the default pool.
int	getNumActive(String username, String password) Get the number of active connections in the pool for a given user.
int	getNumIdle() Get the number of idle connections in the default pool.
int	getNumIdle(String username, String password) Get the number of idle connections in the pool for a given user.
Boolean	getPerUserDefaultAutoCommit(String key) The keys are usernames and the value is the --.
Boolean	getPerUserDefaultReadOnly(String username) The keys are usernames and the value is the --.
Integer	getPerUserDefaultTransactionIsolation(String username) The isolation level of connections when returned from getConnection.
Integer	getPerUserMaxActive(String username) The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit.
Integer	getPerUserMaxIdle(String username) The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit.
Integer	getPerUserMaxWait(String username) The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely.
protected org.apache.commons.dbcp.datasources.PooledConnectionAndInfo	getPooledConnectionAndInfo(String username, String password)
Reference	getReference() Returns a PerUserPoolDataSource Reference.
void	setDefaultMaxActive(int maxActive) The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit.
void	setDefaultMaxIdle(int defaultMaxIdle) The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit.
void	setDefaultMaxWait(int defaultMaxWait) The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely.
void	setPerUserDefaultAutoCommit(String username, Boolean value) The keys are usernames and the value is the --.
void	setPerUserDefaultReadOnly(String username, Boolean value) The keys are usernames and the value is the --.
void	setPerUserDefaultTransactionIsolation(String username, Integer value) The isolation level of connections when returned from getConnection.
void	setPerUserMaxActive(String username, Integer value) The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit.
void	setPerUserMaxIdle(String username, Integer value) The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit.
void	setPerUserMaxWait(String username, Integer value) The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely.
protected void	setupDefaults(Connection con, String username)

Methods inherited from class org.apache.commons.dbcp.datasources.InstanceKeyDataSource

assertInitializationAllowed, getConnection, getConnection, getConnectionPoolDataSource, getDataSourceName, getDefaultTransactionIsolation, getDescription, getJndiEnvironment, getLoginTimeout, getLogWriter, getMinEvictableIdleTimeMillis, getNumTestsPerEvictionRun, getTestOnBorrow, getTestOnReturn, getTestWhileIdle, getTimeBetweenEvictionRunsMillis, getValidationQuery, isDefaultAutoCommit, isDefaultReadOnly, isRollbackAfterValidation, isTestOnBorrow, isTestOnReturn, isTestWhileIdle, isWrapperFor, setConnectionPoolDataSource, setDataSourceName, setDefaultAutoCommit, setDefaultReadOnly, setDefaultTransactionIsolation, setDescription, setJndiEnvironment, setLoginTimeout, setLogWriter, setMinEvictableIdleTimeMillis, setNumTestsPerEvictionRun, setRollbackAfterValidation, setTestOnBorrow, setTestOnReturn, setTestWhileIdle, setTimeBetweenEvictionRunsMillis, setValidationQuery, testCPDS, unwrap, whenExhaustedAction

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PerUserPoolDataSource

public PerUserPoolDataSource()

Default no-arg constructor for Serialization

Method Detail

close

public void close()

Close pool(s) being maintained by this datasource.

Specified by:

close in class InstanceKeyDataSource

getDefaultMaxActive

public int getDefaultMaxActive()

The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit. This value is used for any username which is not specified in perUserMaxConnections.

setDefaultMaxActive

public void setDefaultMaxActive(int maxActive)

The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit. This value is used for any username which is not specified in perUserMaxConnections. The default is 8.

getDefaultMaxIdle

public int getDefaultMaxIdle()

The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit. This value is used for any username which is not specified in perUserMaxIdle.

setDefaultMaxIdle

public void setDefaultMaxIdle(int defaultMaxIdle)

The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit. This value is used for any username which is not specified in perUserMaxIdle. The default is 8.

getDefaultMaxWait

public int getDefaultMaxWait()

The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely. Will fail immediately if value is 0. This value is used for any username which is not specified in perUserMaxWait. The default is -1.

setDefaultMaxWait

public void setDefaultMaxWait(int defaultMaxWait)

The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely. Will fail immediately if value is 0. This value is used for any username which is not specified in perUserMaxWait. The default is -1.

getPerUserDefaultAutoCommit

public Boolean getPerUserDefaultAutoCommit(String key)

The keys are usernames and the value is the --. Any username specified here will override the value of defaultAutoCommit.

setPerUserDefaultAutoCommit

public void setPerUserDefaultAutoCommit(String username,
                                        Boolean value)

The keys are usernames and the value is the --. Any username specified here will override the value of defaultAutoCommit.

getPerUserDefaultTransactionIsolation

public Integer getPerUserDefaultTransactionIsolation(String username)

The isolation level of connections when returned from getConnection. If null, the username will use the value of defaultTransactionIsolation.

setPerUserDefaultTransactionIsolation

public void setPerUserDefaultTransactionIsolation(String username,
                                                  Integer value)

The isolation level of connections when returned from getConnection. Valid values are the constants defined in Connection.

getPerUserMaxActive

public Integer getPerUserMaxActive(String username)

The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxActive.

setPerUserMaxActive

public void setPerUserMaxActive(String username,
                                Integer value)

The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxActive.

getPerUserMaxIdle

public Integer getPerUserMaxIdle(String username)

The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxIdle.

setPerUserMaxIdle

public void setPerUserMaxIdle(String username,
                              Integer value)

The maximum number of active connections that can remain idle in the pool, without extra ones being released, or negative for no limit. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxIdle.

getPerUserMaxWait

public Integer getPerUserMaxWait(String username)

The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely. Will fail immediately if value is 0. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxWait.

setPerUserMaxWait

public void setPerUserMaxWait(String username,
                              Integer value)

The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or -1 to wait indefinitely. Will fail immediately if value is 0. The keys are usernames and the value is the maximum connections. Any username specified here will override the value of defaultMaxWait.

getPerUserDefaultReadOnly

public Boolean getPerUserDefaultReadOnly(String username)

The keys are usernames and the value is the --. Any username specified here will override the value of defaultReadOnly.

setPerUserDefaultReadOnly

public void setPerUserDefaultReadOnly(String username,
                                      Boolean value)

The keys are usernames and the value is the --. Any username specified here will override the value of defaultReadOnly.

getNumActive

public int getNumActive()

Get the number of active connections in the default pool.

getNumActive

public int getNumActive(String username,
                        String password)

Get the number of active connections in the pool for a given user.

getNumIdle

public int getNumIdle()

Get the number of idle connections in the default pool.

getNumIdle

public int getNumIdle(String username,
                      String password)

Get the number of idle connections in the pool for a given user.

getPooledConnectionAndInfo

protected org.apache.commons.dbcp.datasources.PooledConnectionAndInfo getPooledConnectionAndInfo(String username,
                                                                                                 String password)
                                                                                          throws SQLException

Specified by:

getPooledConnectionAndInfo in class InstanceKeyDataSource

Throws:

SQLException

setupDefaults

protected void setupDefaults(Connection con,
                             String username)
                      throws SQLException

Specified by:

setupDefaults in class InstanceKeyDataSource

Throws:

SQLException

getConnectionManager

protected org.apache.commons.dbcp.datasources.PooledConnectionManager getConnectionManager(org.apache.commons.dbcp.datasources.UserPassKey upkey)

Specified by:

getConnectionManager in class InstanceKeyDataSource

getReference

public Reference getReference()
                       throws NamingException

Returns a PerUserPoolDataSource Reference.

Specified by:

getReference in interface Referenceable

Overrides:

getReference in class InstanceKeyDataSource

Returns:

The non-null Reference of this object.

Throws:

NamingException - If a naming exception was encountered while retrieving the reference.

Since:

1.2.2