stanford.netdb.middleware

Class NetDB_Connection_Pool

java.lang.Object

java.lang.Thread

stanford.netdb.middleware.NetDB_Connection_Pool

All Implemented Interfaces:

java.lang.Runnable

public class NetDB_Connection_Pool
extends java.lang.Thread

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
NetDB_Connection_Pool()

Method Summary

Modifier and Type	Method and Description
static void	check_monitor()
static void	cleanup_old_connections()
static java.util.concurrent.ConcurrentLinkedDeque<java.sql.Connection>	free_type(java.lang.Boolean search) Get the correct 'free' ConcurrentLinkedDeque depending on whether or not we're using a search connection.
static java.util.concurrent.ConcurrentLinkedDeque<java.sql.Connection>	free_type(java.sql.Connection con) Get the correct 'free' ConcurrentLinkedDeque depending on whether or not we're using a search connection, when we already have a connection.
static java.sql.Connection	get_connection(java.lang.String db_url, java.util.Properties db_props, java.lang.Boolean search) Get a connection from the pool.
static void	purge_connection(java.sql.Connection con) Forcibly remove a connection from the pool.
static void	return_connection(java.sql.Connection con) Return a connection to the pool.
void	run()
static java.lang.Long	to_millis(java.lang.String time)

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NetDB_Connection_Pool

public NetDB_Connection_Pool()

Method Detail

get_connection

public static java.sql.Connection get_connection(java.lang.String db_url,
                                                 java.util.Properties db_props,
                                                 java.lang.Boolean search)
                                          throws java.sql.SQLException

Get a connection from the pool. If there isn't an available connection of the required type (search, or regular), a new connection will be opened.

Throws:

java.sql.SQLException

return_connection

public static void return_connection(java.sql.Connection con)

Return a connection to the pool.

purge_connection

public static void purge_connection(java.sql.Connection con)

Forcibly remove a connection from the pool. This should not be used as the normal way to remove connections from the pool, but only in instances where we know, or suspect, that a connection won't be usable if it's placed back into the pool.

free_type

public static java.util.concurrent.ConcurrentLinkedDeque<java.sql.Connection> free_type(java.lang.Boolean search)

Get the correct 'free' ConcurrentLinkedDeque depending on whether or not we're using a search connection.

free_type

public static java.util.concurrent.ConcurrentLinkedDeque<java.sql.Connection> free_type(java.sql.Connection con)

Get the correct 'free' ConcurrentLinkedDeque depending on whether or not we're using a search connection, when we already have a connection.

cleanup_old_connections

public static void cleanup_old_connections()
                                    throws java.sql.SQLException

Throws:

java.sql.SQLException

to_millis

public static java.lang.Long to_millis(java.lang.String time)

check_monitor

public static void check_monitor()

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread