Instructions:

This project builds upon the TCP file server and client project, and it contains two parts.

In the first part, you will need to use the Java Executor framework to implement multi$-$

threading. Specifically,

$$ On the client side, the download and the upload commands need to be

executed in separate threads $($so if a large file is being downloaded or uploaded,

the client can serve other requests in parallel.$)$

$$ On the server side, the download and the upload commands need to be

executed in separate threads as well.

$$ On the server side, provide a way for the server administrator to gracefully

shutdown the server program, as follows:

o Let the administrator type a command $($e$.$g$.,$Q$)$ to close the server

program.

o Explicitly call the shutdown$()$ method on the executor to properly shut

down the thread pool.

o Complete and exit the server program.

$($Please note that, you are required to use the Java Executor framework to

implement multi$-$threading.$)$

In the second part, you will need to add proper synchronization to allow multiple

threads to upload and$/$or download files without causing any conflicts. This part is more

open ended and you have the freedom to select the synchronization mechanisms $($such

as mutex locks, condition variables, semaphores, etc.$)$ for your implementation.

Consider the following possible synchronization scenarios:

o We will want to allow multiple client threads to download the same file from the

server in parallel.

o If one client thread is uploading, renaming, or deleting a file on the server, no

other client threads should be able to upload$/$rename$/$delete the same file in

parallel.

o If one client is uploading, renaming or deleting a file on the server, no other

client threads should be able to download the same file in parallel.Instructions:

This project builds upon the TCP file server and client project, and it contains two parts.

In the first part, you will need to use the Java Executor framework to implement multi$-$

threading. Specifically,

$$ On the client side, the download and the upload commands need to be

executed in separate threads $($so if a large file is being downloaded or uploaded,

the client can serve other requests in parallel.$)$

$$ On the server side, the download and the upload commands need to be

executed in separate threads as well.

$$ On the server side, provide a way for the server administrator to gracefully

shutdown the server program, as follows:

o Let the administrator type a command $($e$.$g$.,$Q$)$ to close the server

program.

o Explicitly call the shutdown$()$ method on the executor to properly shut

down the thread pool.

o Complete and exit the server program.

$($Please note that, you are required to use the Java Executor framework to

implement multi$-$threading.$)$

In the second part, you will need to add proper synchronization to allow multiple

threads to upload and$/$or download files without causing any conflicts. This part is more

open ended and you have the freedom to select the synchronization mechanisms $($such

as mutex locks, condition variables, semaphores, etc.$)$ for your implementation.

Consider the following possible synchronization scenarios:

o We will want to allow multiple client threads to download the same file from the

server in parallel.

o If one client thread is uploading, renaming, or deleting a file on the server, no

other client threads should be able to upload$/$rename$/$delete the same file in

parallel.

o If one client is uploading, renaming or deleting a file on the server, no other

client threads should be able to download the same file in parallel.