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title: Sample application: Graph Shell
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About

To demonstrate the work of search algorithms, I made a small console program. The program allows you to select one of three graph samples and search for a path using two algorithms. The source code of the program is located in graph-shell module.

Build & Run

To compile the program, use the command:

$ gradle assemble

This command will create an executable jar, so in Linux or macOS you may run the application by

$ ./build/libs/graph-shell-1.0-SNAPSHOT.jar

On the Windows machine you should run the application using java:

$ java -jar ./build/libs/graph-shell-1.0-SNAPSHOT.jar

Using Graph Shell

The application has build-in three graph schemas: simple, medium, complex. By default the complex scheme is loaded. You may specify the schema in the application.properties file:

graph=simple

Alternatively you may specify the command line parameter when you run the application:

$ ./build/libs/graph-shell-1.0-SNAPSHOT.jar --graph=medium

After starting the program you will see the banner and the prompt indicating the current graph scheme.

$ ./build/libs/graph-shell-1.0-SNAPSHOT.jar 

   _____                          _          _____   _              _   _
  / ____|                        | |        / ____| | |            | | | |
 | |  __   _ __    __ _   _ __   | |__     | (___   | |__     ___  | | | |
 | | |_ | | '__|  / _` | | '_ \  | '_ \     \___ \  | '_ \   / _ \ | | | |
 | |__| | | |    | (_| | | |_) | | | | |    ____) | | | | | |  __/ | | | |
  \_____| |_|     \__,_| | .__/  |_| |_|   |_____/  |_| |_|  \___| |_| |_|
                         | |
                         |_|

complex:>

The command help will show all available commands with short description.

complex:> help
AVAILABLE COMMANDS

Built-In Commands
        clear: Clear the shell screen.
        exit, quit: Exit the shell.
        help: Display help about available commands.
        history: Display or save the history of previously run commands
        script: Read and execute commands from a file.
        stacktrace: Display the full stacktrace of the last error.

Commands
        distance: prints distance for the path
        fastest: finds the fastest path by using Dijkstra's Algorithm
        schema: prints schema of the graph
        shortest: finds the shortest path by using Breadth First Search Algorithm

Typing help <command> you will get more detailed information about each command.

complex:> help fastest


NAME
	fastest - finds the fastest path by using Dijkstra's Algorithm

SYNOPSYS
	fastest [--source] string  [--target] string  

OPTIONS
	--source  string
		
		[Mandatory]
		[this vertex was not found in the graph diagram]

	--target  string
		
		[Mandatory]
		[this vertex was not found in the graph diagram]

The program supports scripts. I provide one script test1.script to demonstrate the difference between two algorithms.

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