• Name: Conor Tighe
• Id: G00314417
• Module: Distributed Systems

Overview:

This is a multi-threaded distributed dictionary web service. A client hosted by tomcat that takes input from a user on a JSP page and sends it to a RMI server to interact with a full dictionary, you can look up words, look up definitions and delete or edit words. Once a request is made the client thread will poll the server every 10 seconds until it gets a response.

Dictionary

I found a dictionary online, copied it into notepad and used regular expression to get rid of white lines and formatted it in a way that I could loop through and split the word and definition into 2 Strings. I then put these 2 strings in a HashMap that is created when the server starts, the client interacts with the HashMap to get results.

Running the app:

The project itself works fine but I ran into problems converting the Maven project into a WAR file and couldn't find a solution, there is a JAR file for the server but once you connect to the RMI throws security errors. In order to run the client you have to import the project in eclipse as a Maven project and use the following run config:

    tomcat7:run

The server is run as a normal project. Once both the server and client are executing go to port 8080 to use the app.

    http://localhost:8080/

Login:

• Username: DSProject
• password: password

Tomcat:

The client runs on Tomcat 7 which is taken care off through a Maven plug-in:

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.2</version>
                    <configuration>
                        <verbose>true</verbose>
                        <source>1.7</source>
                        <target>1.7</target>
                        <showWarnings>true</showWarnings>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                        <path>/</path>
                        <contextReloadable>true</contextReloadable>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

Architecture:

Client:

Serverside:

Technologies used:

• Maven
• Tomcat 7
• RMI
• Java

References:

-RMI Tutorial

-Java Multithreading

-Tomcat Maven Plugin

-Dictionary