atg.distributor

Class DistributorReader

java.lang.Object

java.lang.Thread

atg.distributor.DistributorProcess

atg.distributor.DistributorReader

All Implemented Interfaces:

DistributorConstants, java.lang.Runnable

public class DistributorReader
extends DistributorProcess

The DistributorReader is a thread process which handles the communication protocol from the DistributorReceiver.

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
static java.lang.String	CLASS_VERSION Class version string

Fields inherited from class atg.distributor.DistributorProcess

sResourceBundle

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Fields inherited from interface atg.distributor.DistributorConstants

DEBUG_PREFIX, DEFAULT_FILE_BUFFER_SIZE, ERROR_PREFIX, FAILURE_FLAG, FILECHECK_CMD, INFO_PREFIX, MAX_RETRIES_FOR_FILE_ACCESS, MY_RESOURCE_NAME, PUT_CMD, SUCCESS_FLAG, WARNING_PREFIX

Constructor Summary

Constructors

Constructor and Description
DistributorReader(java.net.Socket pConnection, atg.distributor.DistributorReceiver pManager) Constructs an instance of DistributorReader
DistributorReader(java.net.Socket pConnection, atg.distributor.DistributorReceiver pManager, atg.nucleus.logging.ApplicationLoggingSender pLogger) Constructs an instance of DistributorReader

Method Summary

Modifier and Type	Method and Description
java.net.Socket	getConnection() Returns property Connection
protected java.lang.String	localizeDirectoryPath(java.lang.String pDirectoryPath)
void	processConnection(java.net.Socket pConnection, java.io.File pCache) Handle processing a connection from a client.
protected void	processFileCheckCommand(java.io.DataInputStream pInput, java.io.DataOutputStream pOutput, java.io.File pCache)
protected void	processPutCommand(java.io.DataInputStream pInput, java.io.DataOutputStream pOutput, java.io.File pCache) Reads from the input stream the PUT protocol and creates a file in the local cache directory.
void	run() Handle processing connections from clients
java.lang.String	toString()
protected void	transmitFailureStatusCode(java.io.DataOutputStream pOutput) Sends the failure status code to the remote client
protected void	transmitSuccessStatusCode(java.io.DataOutputStream pOutput) Sends the success status code to the remote client
protected boolean	writeFile(java.io.File pFilePath, long pFileSize, java.io.DataInputStream pInput) Reads the data from the supplied input stream and writes the data to the given file

Methods inherited from class atg.distributor.DistributorProcess

getLogger, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingWarning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logWarning, logWarning, logWarning, setLogger, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingWarning

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, yield

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

Constructor Detail

DistributorReader

public DistributorReader(java.net.Socket pConnection,
                         atg.distributor.DistributorReceiver pManager)

Constructs an instance of DistributorReader

Parameters:

pConnection - Socket connection which will be used to read data

pManager - Manager that helps receive data

DistributorReader

public DistributorReader(java.net.Socket pConnection,
                         atg.distributor.DistributorReceiver pManager,
                         atg.nucleus.logging.ApplicationLoggingSender pLogger)

Constructs an instance of DistributorReader

Parameters:

pConnection - Socket connection which will be used to read data

pManager - Manager that helps receive data

pLogger - Application logger

Method Detail

getConnection

public java.net.Socket getConnection()

Returns property Connection

run

public void run()

Handle processing connections from clients

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

transmitSuccessStatusCode

protected void transmitSuccessStatusCode(java.io.DataOutputStream pOutput)
                                  throws java.io.IOException

Sends the success status code to the remote client

Parameters:

pOutput - the output stream to return a status to the client

Throws:

If - an error occurs while sending the status code

java.io.IOException

transmitFailureStatusCode

protected void transmitFailureStatusCode(java.io.DataOutputStream pOutput)
                                  throws java.io.IOException

Sends the failure status code to the remote client

Parameters:

pOutput - the output stream to return a status to the client

Throws:

If - an error occurs while sending the status code

java.io.IOException

writeFile

protected boolean writeFile(java.io.File pFilePath,
                            long pFileSize,
                            java.io.DataInputStream pInput)
                     throws java.io.IOException

Reads the data from the supplied input stream and writes the data to the given file

Parameters:

pFilePath - the file to store the data sent

pFileSize - the total amount of bytes that are being sent from the client

pInput - the input stream to read from the client

Returns:

true if the all the data was received, written to the given file successfully, and the client was properly notified

Throws:

java.io.IOException

localizeDirectoryPath

protected java.lang.String localizeDirectoryPath(java.lang.String pDirectoryPath)

processPutCommand

protected void processPutCommand(java.io.DataInputStream pInput,
                                 java.io.DataOutputStream pOutput,
                                 java.io.File pCache)
                          throws java.io.IOException

Reads from the input stream the PUT protocol and creates a file in the local cache directory. If this process was accomplished returns a success status code to the remote client.

Parameters:

pInput - the input stream to read from the client

pOutput - the output stream to return a status to the client

Throws:

java.io.IOException - if an error occurs while processing the command

processFileCheckCommand

protected void processFileCheckCommand(java.io.DataInputStream pInput,
                                       java.io.DataOutputStream pOutput,
                                       java.io.File pCache)
                                throws java.io.IOException

Throws:

java.io.IOException

processConnection

public void processConnection(java.net.Socket pConnection,
                              java.io.File pCache)

Handle processing a connection from a client. This method will process many commands.

A single transaction consists of the following:

1. Client sends UTF string of command type (PUT, DELETE)
2. Client sends UTF string of file name
3. If the command is PUT, the client sends a long of the file size
4. If the command is PUT, the client sends actual file as array of bytes
5. Server performs command, saving the data as the desired file (PUT), deleting (DELETE) the requested file, or deleting all the files
6. Server replies with UTF string 'SUCCESS' when operation has been completed

It is important to note that the return code is not sent until the file is actualy on disk or deleted.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Thread