Requirements:

Writing the code in java, and running a program without errors.

Introduction

The main goal is to design and implement a directory service using sockets.

Learning objectives:

1. Build distributed applications using technologies like Unix and Java sockets, SUN RPC, Java RMI, and message-passing tools such as PVM and MPI.

2. Build concurrent programs using multiple processes and multiple threads.

3. Design and implement client-server applications.

4. Apply knowledge of interprocess communication concepts and programming techniques to write programs using UNIX system calls and using high-level distributed programming tools.

5. Write basic multi-process and/or multi-threaded applications.

Problem Statement

You are requested to write a program of a simple directory service. You can choose the type of sockets to use and justify your choice. You may choose to use another middleware (e.g. RPC or RMI) as long as you justify your choice. Your system should be able to be deployed on a distributed system.

You should write at least two programs: the directory server, and the client program. You can make appropriate assumptions if needed with justification.

The directory service should provide at least the following two functions:

- Registration, which allows a registration of an entity

- Lookup, which allows a client to lookup an entity by name or by attributes.