org.apache.manifoldcf.core.database
Class Database.ExecuteQueryThread

java.lang.Object
  java.lang.Thread
      org.apache.manifoldcf.core.database.Database.ExecuteQueryThread

All Implemented Interfaces:

java.lang.Runnable

Enclosing class:

Database

protected class Database.ExecuteQueryThread
extends java.lang.Thread

Thread used to execute queries. An instance of this thread is spun up every time a query is executed. This is necessary because JDBC does not guarantee interruptability, and the Postgresql JDBC driver unfortunately eats all thread interrupts. So, we fire up a thread to do each interaction with the database server, thus insuring that the owning thread remains interruptable and will therefore not block shutdown.

Nested Class Summary

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

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

Field Summary

protected boolean	bResults
protected java.sql.Connection	connection
protected java.lang.Throwable	exception
protected int	maxResults
protected java.util.ArrayList	params
protected java.lang.String	query
protected ILimitChecker	returnLimit
protected IResultSet	rval
protected ResultSpecification	spec

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Database.ExecuteQueryThread(java.sql.Connection connection, java.lang.String query, java.util.ArrayList params, boolean bResults, int maxResults, ResultSpecification spec, ILimitChecker returnLimit)

Method Summary

java.lang.Throwable	getException()
IResultSet	getResponse()
void	run()

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

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

Field Detail

connection

protected java.sql.Connection connection

query

protected java.lang.String query

params

protected java.util.ArrayList params

bResults

protected boolean bResults

maxResults

protected int maxResults

spec

protected ResultSpecification spec

returnLimit

protected ILimitChecker returnLimit

exception

protected java.lang.Throwable exception

rval

protected IResultSet rval

Constructor Detail

Database.ExecuteQueryThread

public Database.ExecuteQueryThread(java.sql.Connection connection,
                                   java.lang.String query,
                                   java.util.ArrayList params,
                                   boolean bResults,
                                   int maxResults,
                                   ResultSpecification spec,
                                   ILimitChecker returnLimit)

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

getException

public java.lang.Throwable getException()

getResponse

public IResultSet getResponse()