simpledb

Class BPlusTreeUtility.BPlusTreeReader

java.lang.Object

java.lang.Thread

simpledb.BPlusTreeUtility.BPlusTreeReader

All Implemented Interfaces:

java.lang.Runnable

Enclosing class:

BPlusTreeUtility

static class BPlusTreeUtility.BPlusTreeReader
extends java.lang.Thread

Helper class that searches for tuple(s) in a new thread

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
(package private) BPlusTreeFile	bf
(package private) int	count
(package private) java.lang.Object	elock
(package private) java.lang.Exception	error
(package private) Field	f
(package private) boolean	found
(package private) java.lang.Object	slock
(package private) TransactionId	tid

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
BPlusTreeUtility.BPlusTreeReader(TransactionId tid, BPlusTreeFile bf, Field f, int count)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	found()
java.lang.Exception	getError()
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

tid

TransactionId tid

bf

BPlusTreeFile bf

f

Field f

count

int count

found

boolean found

error

java.lang.Exception error

slock

java.lang.Object slock

elock

java.lang.Object elock

Constructor Detail

BPlusTreeUtility.BPlusTreeReader

public BPlusTreeUtility.BPlusTreeReader(TransactionId tid,
                                BPlusTreeFile bf,
                                Field f,
                                int count)

Parameters:

tid - the transaction on whose behalf we want to search for the tuple(s)

bf - the B+ tree file containing the tuple(s)

f - the field to search for

count - the number of tuples to search for

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

found

public boolean found()

Returns:

true if we successfully found the tuple(s)

getError

public java.lang.Exception getError()

Returns:

an Exception instance if one occurred while searching for the tuple(s); null otherwise