PubSub

Overview

This is publish subscribe system (PubSub) that uses two forms of communication: basic messages using UDP and Java RMI for publishing and subsscribing. The PubSub system will allow the publishing of simple formatted “articles”.

Authors

• Abhijeet Gaikwad
• Prashant Chaudhary

Building Project

Steps:

• Install pom: mvn install

• Compile: mvn compile

• Create package: mvn package

  • This will create tar distribution in dist/target/

• Generate eclipse project files: mvn eclipse:eclipse

  • This project can be now imported in eclipse.

Starting RMI Registry

• To start RMI registry on server host you need to set the CLASSPATH first.
• The classpath should include the path of the jar that contains the Communicate interface and the PubSubService\_Stub. This is the common and server jar.
• Eg. export CLASSPATH="/home/prashant/workspace/PubSub/common/target/common-1.0-SNAPSHOT.jar:/home/prashant/workspace/PubSub/server/target/server-1.0-SNAPSHOT.jar"
• Run rmiregistry now.

Setting up Security policy

• Create a security policy file.
• Eg security.policy. Contents of this file: grant { // Allow everything for now permission java.security.AllPermission; };

Starting client (on Linux)

• Go to the pubsub-1.0-SNAPSHOT/: cd dist/target/pubsub-1.0-SNAPSHOT/
• Run: java -Djava.security.policy="<SECURITY POLICY FILE>" -cp ./client-1.0-SNAPSHOT.jar:./server-1.0-SNAPSHOT.jar:./common-1.0-SNAPSHOT.jar edu.umn.pubsub.client.Client <IP ADDRESS OF THE SERVER> <IP_ADDR_OF_UDP_CLIENT> <UDP_CLIENT_PORT>
• This will give you the client command line prompt.

Starting server (on Linux)

• Go to the pubsub-1.0-SNAPSHOT/: cd dist/target/pubsub-1.0-SNAPSHOT/
• Run: java -Djava.security.policy="<SECURITY POLICY FILE>" -cp ./client-1.0-SNAPSHOT.jar:./server-1.0-SNAPSHOT.jar:./common-1.0-SNAPSHOT.jar edu.umn.pubsub.server.Server <IP ADDRESS OF THE SERVER>