InfinispanRuntimeRunner.java

import org.aesh.command.AeshCommandRuntimeBuilder;
import org.aesh.command.Command;
import org.aesh.command.CommandException;
import org.aesh.command.CommandNotFoundException;
import org.aesh.command.CommandRuntime;
import org.aesh.command.impl.registry.AeshCommandRegistryBuilder;
import org.aesh.command.invocation.CommandInvocation;
import org.aesh.command.parser.CommandLineParserException;
import org.aesh.command.registry.CommandRegistryException;
import org.aesh.command.validator.CommandValidatorException;
import org.aesh.command.validator.OptionValidatorException;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @author <a href="mailto:stalep@gmail.com">Ståle Pedersen</a>
 */
public class InfinispanRuntimeRunner {

    private Class<? extends Command> command;

    private List<Class<? extends Command>> subCommands;

    private CommandRuntime runtime;

    private String[] args;

    private InfinispanRuntimeRunner() {
        subCommands = new ArrayList<>();
    }

    public static InfinispanRuntimeRunner builder() {
        return new InfinispanRuntimeRunner();
    }

    public InfinispanRuntimeRunner command(Class<? extends Command> command) {
        this.command = command;
        return this;
    }

    public InfinispanRuntimeRunner subCommand(Class<? extends Command> command) {
        subCommands.add(command);
        return this;
    }

    public InfinispanRuntimeRunner commandRuntime(CommandRuntime runtime) {
        this.runtime = runtime;
        return this;
    }

    public InfinispanRuntimeRunner args(String[] args) {
        this.args = args;
        return this;
    }

    public void execute() {
        if (command == null && runtime == null)
            throw new RuntimeException("Command needs to be added");
        try {
            String commandName = null;
            if (runtime == null) {
                if(subCommands.isEmpty()) {
                    runtime = AeshCommandRuntimeBuilder.builder().
                            commandRegistry(AeshCommandRegistryBuilder.builder().command(command).create())
                            .build();
                }
                else {
                    //make sure we get the main command name (lets just create a tmp registry to fetch it)
                    commandName = AeshCommandRegistryBuilder.builder()
                            .command(command).create().getAllCommandNames().iterator().next();

                    AeshCommandRegistryBuilder<CommandInvocation> registryBuilder = AeshCommandRegistryBuilder.builder();
                    registryBuilder.command(command);
                    registryBuilder.commands(subCommands);

                    runtime = AeshCommandRuntimeBuilder.builder().commandRegistry(registryBuilder.create()).build();
                }
            }

            final Set<String> commandNames = runtime.getCommandRegistry().getAllCommandNames();
            if (commandNames.isEmpty())
                throw new RuntimeException("Command needs to be added to the registry.");
            else if (commandNames.size() > 1)
                throw new RuntimeException("Only one command can be added to the registry.");

            if(commandName == null)
                commandName = commandNames.iterator().next();
            StringBuilder sb = new StringBuilder(commandName);
            if (args.length > 0) {
                sb.append(" ");
                if (args.length == 1) {
                    sb.append(args[0]);
                } else {
                    for (String arg : args) {
                        if (arg.indexOf(' ') >= 0) {
                            sb.append('"').append(arg).append("\" ");
                        } else {
                            sb.append(arg).append(' ');
                        }
                    }
                }
            }

            try {
                runtime.executeCommand(sb.toString());
            } catch (CommandNotFoundException e) {
                System.err.println("Command not found: " + sb.toString());
            } catch (CommandException | CommandLineParserException | CommandValidatorException | OptionValidatorException e) {
                showHelpIfNeeded(runtime, commandName, e);
            } catch (InterruptedException | IOException e) {
                System.err.println(e.getMessage());
            }

        } catch (CommandRegistryException e) {
            throw new RuntimeException("Exception while executing command: " + e.getMessage());
        }
    }

    private static void showHelpIfNeeded(CommandRuntime runtime, String commandName, Exception e) {
        if (e != null) {
            System.err.println(e.getMessage());
        }
        System.err.println(runtime.commandInfo(commandName));
    }
}