gr.uoa.di.madgik.searchlibrary.operatorlibrary.merge
Class ReaderScan

java.lang.Object
  java.lang.Thread
      gr.uoa.di.madgik.searchlibrary.operatorlibrary.merge.ReaderScan

All Implemented Interfaces:

Runnable

public class ReaderScan
extends Thread

Helper thread class used to iterate over a ResultSet to retrieve the local payload parts and notify the merging thread when they are available

Author:

UoA

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

ReaderScan(Vector<ReaderHolder> readers, int index, BlockingQueue<RecordBufferEntry> buf, Queue<EventEntry> events, long timeout, TimeUnit timeUnit, String uid, OperationMode operationMode)
Creates a new ReaderScan working on some input ForwardReader

Method Summary

Pair<RecordBufferEntry,Integer>	peek()
Pair<RecordBufferEntry,Integer>	poll()
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

Constructor Detail

ReaderScan

public ReaderScan(Vector<ReaderHolder> readers,
                  int index,
                  BlockingQueue<RecordBufferEntry> buf,
                  Queue<EventEntry> events,
                  long timeout,
                  TimeUnit timeUnit,
                  String uid,
                  OperationMode operationMode)

Creates a new ReaderScan working on some input ForwardReader

Parameters:

readers - The ReaderHolder vector with the available input sources

index - The index of the ReaderHolder this thread should operate on

buf - The buffer to place the records read along with the id of the reader, which is equal to index

events - A queue to place the events read along with the id of the reader, which is equal to index

timeout - The timeout to use

timeUnit - The timeout unit to use

uid - A unique identifier for this operation

operationMode - The operation mode to use

Method Detail

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

See Also:

Runnable.run()

poll

public Pair<RecordBufferEntry,Integer> poll()

peek

public Pair<RecordBufferEntry,Integer> peek()