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README.md

Distributed Systems implemented for Comp 512. Has transactions and uses replication for fault tolerance.

Author: Muhammad Yousuf Ahmad Date: September 20, 2015

COMP 512: Distributed Systems School of Computer Science McGill University

A Distributed System in Java using Web Services. Adapted from CSE 593, University of Washington.

==========

Project Structure:

  • build generated by ant

    • classes generated code and compiled classes
    • war deployable web service
  • etc configuration

    • server.policy server security policy
    • sun-jaxws.xml service endpoint mapping
    • web.xml service deployment settings
  • lib jar libraries

  • src source code

    • client client code
      • Client.java client CLI
      • WSClient.java web service proxy wrapper
    • server server code
      • ws web service
        • Main.java embedded Tomcat launcher
        • ResourceManager.java resource manager API
      • ResourceManagerImpl.java resource manager implementation
      • *.java
  • webapps generated by ant

    • rm deployed web service
  • build.xml ant build configuration
  • README.txt this file

==========

Ant Targets:

  • clean deletes directories: build and webapps
  • setup creates directories: build and webapps
  • build-server processes annotations and compiles server code
  • create-war creates deployable web service
  • deploy-war deploys war to webapps directory
  • start-tomcat launches embedded Tomcat
  • server does all of the above
  • generate-client generates proxy classes from web service wsdl
  • build-client compiles client code
  • client does both of the above

Ant Properties:

  • ${service.name} name of web service (default: rm)
  • ${service.host} hostname/IP of server (default: localhost)
  • ${service.port} web service port binding (default: 8080)

Note that you may either modify these properties directly within build.xml, or specify any of them when launching ant from the command line (as below).

==========

Instructions:

  1. Build and launch your service on the server machine:

    [userx][lab1-1][proj1] ant server -Dservice.port=8081

    Make sure you use a unique port number to avoid port conflicts with other groups that may be running their services on the same machine in the lab.

    You may use your group number as a prefix. For example: Group 1: 1081; Group 8: 8081; Group 10: 10081; Group 18: 18081

  2. Build and launch your client on the client machine:

    [userx][lab1-2][proj1] ant client -Dservice.host=lab1-1 -Dservice.port=8081

    Make sure you specify the hostname/IP of the server and the port from step 1.

  3. Run some test commands on the client:

    [java] Client Interface [java] Type "help" for list of supported commands

    newflight,1,1,1,1 [java] Adding a new Flight using id: 1 [java] Flight number: 1 [java] Add Flight Seats: 1 [java] Set Flight Price: 1 [java] Flight added

    queryflight,1,1 [java] Querying a flight using id: 1 [java] Flight number: 1 [java] Number of seats available: 1

    If it works, you will see corresponding log messages on the server:

    [java] http-nio-8080-exec-1 INFO: RM::addFlight(1, 1, $1, 1) called. [java] http-nio-8080-exec-1 INFO: RM::addFlight(1, 1, $1, 1) OK. [java] http-nio-8080-exec-1 INFO: RM::queryNum(1, flight-1) called. [java] http-nio-8080-exec-1 INFO: RM::queryNum(1, flight-1) OK: 1