CS476/576

Assignment #5

Due Midnight, Monday  Dec. 4, 2006

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Write a Java/Swing program with the following descriptions (Also See Figure):

NAME

coreadServer  -   Concurrent Readers Server.

coreadClient  -   Concurrent Readers Client.

SYNOPSIS

java coreadServer

java coreadClient

DESCRIPTION

Ø The coreadClient program connects to the coreadServer with a tcp socket S and

creates n threads.

Each thread   i, i= 1, 2,.., n sleeps a random amount of time T,

where T <= n seconds and when it wakes up it performs the following steps:

· Change its status to from Sleep to Active.

· Reads 128 characters from InputFile.

If there is no more data to read

Change its status to Terminated and exit.

Else use socket S to send the data that have been read.

· Sleeps 3 seconds and then:

§ Increments its read counter.

§ Change its status from Active to Sleep.

The coreadClient Swing interface has three areas:

Input arguments area: to enter the values of:

<n> <InputFile> <RemoteHost> <Port>

Information area: Have n rows, one row for each thread.

Each raw displays the following information for the associated thread:

- Status: has three values Sleep/Active/Terminated

- Read Counter: to display the number of reads.

Control area: has four buttons:

- Start: to start the threads (the button becomes insensitive after the start)

- Suspend: to suspend all threads.

- Resume: to resume the suspended threads.

- Quit: to exit (the button becomes sensitive only when all threads are terminated).

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Ø The coreadServer program creates a server tcp socket R, displays the socket port number, reads from R and saves the received data in the OutputFile.

The coreadServer Swing interface has three areas:

Input arguments area:

To enter the value of the <OutputFile>

Information area: contains the following components:

- Server Information: to display the host and port information of the R.

- Progress Bar: to show the progress of receiving the file.

Control area: has two buttons:

- Start: to start the Server (the button becomes insensitive after the start)

- Quit: to exit (the button becomes sensitive when all coreadClient threads are terminated).

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