Checkpoint

Warning

All the commands assume you are in the project directory unziped

Javassist tool to use

The code will generate a log file called log in the directory where invoked.

• The tool to be used is ICount

How to launch the webserver in aws

• must add the keypair and a config file with credentials of aws (with names mykeypair.pem and config.sh respectively) to the aws directory.
• cd aws && ./create.sh to create AMI.
• cd aws && ./launch.sh to launch the load balancer with auto scaler.
• cd aws && ./terminate.sh to terminate the deployment and clean all resources in usage.

How to run the webserver locally

Compile

• To compile the javassist: cd javassist && mvn clean package.
• To compile the webserver: cd server && mvn clean package.
• The jar files will be created in javassist/target/ and server/webserver/target/.

Run instructions

• You must run the following commands by order. If you want to run the server again, you only need to run the last command.
• You must adapt the jar paths in the following commands if you are not in the main directory of the submitted zip

Run without javassist

cp server/webserver/target/webserver-1.0.0-SNAPSHOT-jar-with-dependencies.jar .

java -cp webserver-1.0.0-SNAPSHOT-jar-with-dependencies.jar pt.ulisboa.tecnico.cnv.webserver.WebServer

Run with javassist

cp server/webserver/target/webserver-1.0.0-SNAPSHOT-jar-with-dependencies.jar .

cp javassist/target/JavassistWrapper-1.0-jar-with-dependencies.jar .

java -cp webserver-1.0.0-SNAPSHOT-jar-with-dependencies.jar -javaagent:JavassistWrapper-1.0-jar-with-dependencies.jar=ICount:pt:output pt.ulisboa.tecnico.cnv.webserver.WebServer

Final submission

Code Organization

• Code is divided in 5 directories
• aws directory has the shell scripts to create the instances image and create lambda functions
• cnv-24-gxx is the default webserver given by teachers that is used for the lambdas
• javassist is the javaagent project with the instrumentation code using the dynamoDB
• loadbalancer is the project with our own loadbalancer and autoscaler implementations
• server is the webserver given by teachers with some modifications to save the instrumented code

Loadbalancer observations

• To run the loadbalancer you must source the config.sh file
• To run the loadbalancer you must pass as a argument the image id of the instances to balance