gr.uoa.di.madgik.grs.store.buffer
Class BufferStoreReader

java.lang.Object
  java.lang.Thread
      gr.uoa.di.madgik.grs.store.buffer.BufferStoreReader

All Implemented Interfaces:

Runnable

public class BufferStoreReader
extends Thread

This class accesses the content stored through a IBufferStore, restores the incoming and stored Records and publishes them in a new IBuffer using a RecordWriter whose locator returns to be used by any interested reader. The demultiplexing procedure is performed based on the multiplexing type that was set in the respective IBufferStore

Author:

gpapanikos

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

BufferStoreReader(String key, IWriterProxy proxy)
Creates a new instance

Method Summary

void	dispose() Disposes all managed resources
URI	populate() Starts the background execution of the demultiplex procedure and authors the restored Records using an RecordWriter whose locator is then returned
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

BufferStoreReader

public BufferStoreReader(String key,
                         IWriterProxy proxy)
                  throws GRS2BufferStoreInvalidOperationException,
                         GRS2BufferStoreAccessException,
                         GRS2BufferStoreInvalidArgumentException,
                         GRS2WriterException

Creates a new instance

Parameters:

key - the key with which the IBufferStore that is to be demultiplexed is associated

proxy - the proxy to use for the RecordWriter that will make the restored Records available

Throws:

GRS2BufferStoreInvalidOperationException - the IBufferStore did not yield any BufferStoreEntry to use

GRS2BufferStoreAccessException - The RecordDefinitions of the Records could not be found

GRS2BufferStoreInvalidArgumentException - No IBufferStore was found

GRS2WriterException - Could nmot initialize and retrieve the locator of the RecordWriter

Method Detail

populate

public URI populate()
             throws GRS2WriterException

Starts the background execution of the demultiplex procedure and authors the restored Records using an RecordWriter whose locator is then returned

Returns:

the locator to the authored IBuffer

Throws:

GRS2WriterException - the state of the demultiplexing procedure does not permit this operation to be completed

dispose

public void dispose()

Disposes all managed resources

run

public void run()

Once the populate() method is invoked, the execution is performed in a background daemon thread that depending on the IBufferStore.getMultiplexType() value, will forward the execution on the appropriate IDemultiplex implementation. Depending on the multiplex type defined, the implementations used are FifoDemultiplex and FirstAvailableDemultiplex

Specified by:

run in interface Runnable

Overrides:

run in class Thread

See Also:

Thread.run()