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

Fields

Modifier and Type	Field and Description
protected boolean	bResults
protected java.sql.Connection	connection
protected java.lang.Throwable	exception
protected int	maxResults
protected java.util.List	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

Constructors

Constructor and Description
ExecuteQueryThread(java.sql.Connection connection, java.lang.String query, java.util.List params, boolean bResults, int maxResults, ResultSpecification spec, ILimitChecker returnLimit)

Method Summary

Modifier and Type	Method and Description
IResultSet	finishUp()
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, 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, 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.List 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

ExecuteQueryThread

public ExecuteQueryThread(java.sql.Connection connection,
                          java.lang.String query,
                          java.util.List 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

finishUp

public IResultSet finishUp()
                    throws ManifoldCFException,
                           java.lang.InterruptedException

Throws:

ManifoldCFException

java.lang.InterruptedException