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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

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>