Command (Vert.x Stack - Docs 5.0.0.CR3 API)

All Known Implementing Classes:

DefaultCommand
```
public interface Command
```
A plug-in to the Vert.x command or Launcher class. Each command instance is created by a CommandFactory.
Command implementation can retrieve argument and option using the Argument and Option annotations. Documentation / help is provided using the Summary (single sentence) and Description annotations.
Commands follow a strict lifecycle. The setUp(ExecutionContext) method is called with an execution context. It lets you validate the inputs and prepare the environment is needed. The run() method is called immediately after setUp(ExecutionContext), and executes the command. Finally, once the command has completed, the tearDown() method is called. In this method you have the opportunity to cleanup.

Author:

Clement Escoffier

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`run()`	Executes the command.
`void`	`setUp(ExecutionContext context)`	Set up the command execution environment.
`void`	`tearDown()`	The command has been executed.

- Method Detail
  - setUp
```
void setUp(ExecutionContext context)
    throws CLIException
```
    Set up the command execution environment. The command line model has been retrieved and is frozen. Values has been set / injected. You can use this callback to validate the inputs.
    
    Parameters:
    
    context - the context
    
    Throws:
    
    CLIException - if the validation failed
  - run
```
void run()
  throws CLIException
```
    Executes the command.
    
    Throws:
    
    CLIException - If anything went wrong.
  - tearDown
```
void tearDown()
       throws CLIException
```
    The command has been executed. Use this method to cleanup the environment.
    
    Throws:
    
    CLIException - if anything went wrong