Java Doc for PooledDataSource.java in  » Database-ORM » XORM » org » xorm » datastore » sql » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » XORM » org.xorm.datastore.sql   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.xorm.datastore.sql.PooledDataSource PooledDataSource public class PooledDataSource implements DataSource(Code) Wraps a JDBC driver manager and provides a pooling of connections. author:    Scott Bendar version:    $Revision: 1.7 $ Field Summary protected  LinkedList availableConnections      protected  int connCount      protected  Driver driver      protected  Properties props      Constructor Summary public   PooledDataSource()      Method Summary public  void close()      Releases all available connections. protected  void dropConnection(PooledConnection conn)      public  boolean getCheckReturnedConnection()      If set, instructs the connection to verify its valid when the caller is done with the connection (calls close). public  Connection getConnection()      Gets a DB connection, actually a wrapper that allows the connection to be pooled. public  Connection getConnection(String userName, String password)      This function is currently not implemented as it doesn't allow us to use the connections in the pool. public  String getConnectionUrl()      public  String getDriverName()      public  long getIdleCheck()      Gets the amount of time in milliseconds a connection has been idle before the pool tests the connection to see if its still valid. public  String getIdleCheckSQL()      Gets a sql statement to be used to check a connection. public  Integer getIsolationLevel()      public  PrintWriter getLogWriter()      The PooledDataSource class uses JDK 1.4 logging and ignores the log writer. public  int getLoginTimeout()      public  int getMaxPool()      The maximum number of connections created by the data source. public  int getMinPool()      The minimum number of connections in the pool. public  String getUser()      protected  void makeAvailable(PooledConnection conn)      Makes the connection available again. public  void setCheckReturnedConnection(boolean value)      If set, instructs the connection to verify its valid when the caller is done with the connection (calls close). public  void setConnectionUrl(String s)      public  void setDriverName(String s)      public  void setIdleCheck(long idle)      Sets the amount of time in milliseconds a connection has been idle before the pool tests the connection to see if its still valid. public  void setIdleCheckSQL(String sql)      Sets a sql statement to be used to check a connection. public  void setIsolationLevel(Integer isolationLevel)      Sets the transaction isolation level. public  void setLogWriter(PrintWriter logger)      public  void setLoginTimeout(int timeout)      Sets the maximum time to wait in seconds for a connection before throwing an exception. public  void setMaxPool(int i)      public  void setMinPool(int i)      public  void setPassword(String s)      Sets the password to use when creating a db connection. public  void setUser(String s)      Field Detail availableConnections protected LinkedList availableConnections(Code) connCount protected int connCount(Code) driver protected Driver driver(Code) props protected Properties props(Code) Constructor Detail PooledDataSource public PooledDataSource()(Code) Initializes a new pooled data source Method Detail close public void close()(Code) Releases all available connections. dropConnection protected void dropConnection(PooledConnection conn)(Code) remove a connection from the pool getCheckReturnedConnection public boolean getCheckReturnedConnection()(Code) If set, instructs the connection to verify its valid when the caller is done with the connection (calls close). This is used for debugging purposes only to help catch folks to return closed connections to the pool. getConnection public Connection getConnection() throws SQLException(Code) Gets a DB connection, actually a wrapper that allows the connection to be pooled. The method first allocates a connection from the available pool, if there are none available it creates a new connection unless that would put it over the max pool size, in which case it forces the caller to wait. If the data source was configured with a loginTimeout value greater than 0, it will wait for loginTimeout seconds for a connection. getConnection public Connection getConnection(String userName, String password) throws SQLException(Code) This function is currently not implemented as it doesn't allow us to use the connections in the pool. The workaround is to create a new data source with a different user and password. Should this just pass back an unpooled real connection? getConnectionUrl public String getConnectionUrl()(Code) getDriverName public String getDriverName()(Code) getIdleCheck public long getIdleCheck()(Code) Gets the amount of time in milliseconds a connection has been idle before the pool tests the connection to see if its still valid. -1: Never check 0: Always check getIdleCheckSQL public String getIdleCheckSQL()(Code) Gets a sql statement to be used to check a connection. If not specified, isConnectionClosed() is called instead. getIsolationLevel public Integer getIsolationLevel()(Code) getLogWriter public PrintWriter getLogWriter()(Code) The PooledDataSource class uses JDK 1.4 logging and ignores the log writer. getLoginTimeout public int getLoginTimeout()(Code) getMaxPool public int getMaxPool()(Code) The maximum number of connections created by the data source. Once the max is exceeded callers must wait for a connection to become available. getMinPool public int getMinPool()(Code) The minimum number of connections in the pool. It will create this number of connections when the pool is first initialized and the pool will never shrink below this many connections. getUser public String getUser()(Code) makeAvailable protected void makeAvailable(PooledConnection conn)(Code) Makes the connection available again. This is called by the PooledConnection class when the user chooses to close a connection. setCheckReturnedConnection public void setCheckReturnedConnection(boolean value)(Code) If set, instructs the connection to verify its valid when the caller is done with the connection (calls close). This is used for debugging purposes only to help catch folks to return closed connections to the pool. setConnectionUrl public void setConnectionUrl(String s)(Code) Set the URL used to connect to the DB setDriverName public void setDriverName(String s)(Code) Set the name of the driver to load when connecting to the DB setIdleCheck public void setIdleCheck(long idle)(Code) Sets the amount of time in milliseconds a connection has been idle before the pool tests the connection to see if its still valid. -1: Never check 0: Always check setIdleCheckSQL public void setIdleCheckSQL(String sql)(Code) Sets a sql statement to be used to check a connection. If not specified, isConnectionClosed() is called instead. setIsolationLevel public void setIsolationLevel(Integer isolationLevel)(Code) Sets the transaction isolation level. If null, no specific setting is made on a Connection instance; otherwise, the wrapped value is used. setLogWriter public void setLogWriter(PrintWriter logger)(Code) setLoginTimeout public void setLoginTimeout(int timeout)(Code) Sets the maximum time to wait in seconds for a connection before throwing an exception. setMaxPool public void setMaxPool(int i)(Code) setMinPool public void setMinPool(int i)(Code) setPassword public void setPassword(String s)(Code) Sets the password to use when creating a db connection. For security reasons, there is no way to get the password. setUser public void setUser(String s)(Code) Sets the user name to pass when making a db connection Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)