AbdelGhafour69 / scala_cloud_programming

File System Using Scala/akka

Name: Abdelghafour Aboukacem

Implementation

This repository contains the implementation of the project till day 3 part 2. The file StoreManagerFile contains the code for the following actors:

• UserFile: contains the workflow of a user running commands on the terminal, the commands are in the form of: Add/Store/Lookup Key Value
• StoreManager: Actor responsible for responding to the user

In source files you will find:

• CacheAgent: representation of the caching agent
• RandomUser: representation of the user that issues 5000 requests to the store manager
• MapAgent: representation of the key/value store
• Main: the main file contains the first use case implemented using the in-memory key/value store.

The workflow of a Store operation:

• The user issues the store command to the store manager
• The manager sends a store message to the caching agent which stores it in its map which implements an LRU caching strategy This is the method used.
• The Caching Agent also sends a message to the MapAgent to append the key/value.
• The MapAgent adds the data to the map and to the file.

The workflow of a Delete operation:

• The user issues the delete command to the store manager
• The manager sends a delete message to the caching agent which deletes the key from its map.
• The Caching Agent also sends a message to the MapAgent to delete the key.
• The MapAgent deletes the key from the map and from the file.

The workflow of a Lookup operation:

• The user issues the lookup command to the store manager
• The manager sends a lookup message to the caching agent. If the data is present in the map the caching agent sends back a response message. If not it sends the lookup request to the MapAgent
• The MapAgent does the same thing, if it finds the key in the map it returns a response message to the user through the previous actors. If it doesn't find it, then a lookup in the file is performed and either a response or an error message is sent back to the user through the previous actors.

To run

In order to run the project:

cd FileSystem

sbt run

By default, this will run the RandomUserAgent If you choose to run the normal UserAgent which writes commands on terminal, please make sure to change the actor nature under the entry point of StoreManagerFile

In order to generate the jar file:

sbt package

The jar file can be downloaded from Here