bbsh

Minimall Shell for Java applications to enable runtime configuration, control. querying, etc.

defining new shell commands:

Implementing a basic echo command is done as follows:

@CLICommand(name="echo", topic="core", description="echo arguments")
public static class EchoCommand implements Command {

    @Argument(metaVar = "[arg [arg2 [arg3] ...]]", usage = "arguments")
    private List<String> args = new ArrayList<String>();

    @Override
    public int executeCommand(CommandContext context) throws CLIException {
        StringBuilder sb = new StringBuilder();
        for (int i = 0, n = args.size(); i < n; i++) {
            if (i > 0) sb.append(' ');
            sb.append(args.get(i));
        }
        context.out.println(sb.toString());
        return 0;
    }
}