com.nike.cerberus.command.CerberusCommand.java Source code

Introduction

Here is the source code for com.nike.cerberus.command.CerberusCommand.java

Source

/*
 * Copyright (c) 2016 Nike, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.nike.cerberus.command;

import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;
import com.beust.jcommander.ParametersDelegate;
import com.nike.cerberus.command.validator.EnvironmentNameValidator;
import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.List;

import static com.nike.cerberus.command.CerberusCommand.COMMAND_NAME;

/**
 * Global command parameters.
 */
@Parameters(commandNames = COMMAND_NAME, commandDescription = "Cerberus Admin and Lifecycle CLI.")
public class CerberusCommand {

    public static final String COMMAND_NAME = "cerberus";

    @Parameter
    private List<String> parameters = new ArrayList<>();

    @Parameter(names = { "--environment", "--env",
            "-e" }, description = "Cerberus environment name to execute against. This is required to be set via 'CERBERUS_CLI_ENV' env var or supplied via command arg", validateWith = EnvironmentNameValidator.class)
    private String environment;

    @Parameter(names = { "--region",
            "-r" }, description = "The AWS region to execute against. This is required to be set via 'CERBERUS_CLI_REGION' env var or supplied via command arg")
    private String region;

    @Parameter(names = { "--debug" }, description = "Enables debug output.")
    private boolean debug;

    @Parameter(names = { "--help", "-h" }, description = "Prints the usage screen for the command.", help = true)
    private boolean help;

    @Parameter(names = { "--version", "-v" }, description = "Prints the version of the CLI.")
    private boolean version;

    @ParametersDelegate
    private ProxyDelegate proxyDelegate = new ProxyDelegate();

    public List<String> getParameters() {
        return parameters;
    }

    public String getEnvironment() {
        String calculatedEnv = StringUtils.isNotBlank(environment) ? environment
                : System.getenv("CERBERUS_CLI_ENV");

        if (StringUtils.isBlank(calculatedEnv)) {
            throw new IllegalArgumentException(
                    "Failed to determine environment, checked 'CERBERUS_CLI_ENV' env var and -e, --env, --environment command options, options must go before the command");
        }

        return calculatedEnv;
    }

    public String getRegion() {
        String calculatedRegion = StringUtils.isNotBlank(region) ? region : System.getenv("CERBERUS_CLI_REGION");

        if (StringUtils.isBlank(calculatedRegion)) {
            throw new IllegalArgumentException(
                    "Failed to determine environment, checked 'CERBERUS_CLI_REGION' env var and -r, --region command options, options must go before the command");
        }

        return calculatedRegion;
    }

    public boolean isDebug() {
        return debug;
    }

    public boolean isHelp() {
        return help;
    }

    public boolean isVersion() {
        return version;
    }

    public ProxyDelegate getProxyDelegate() {
        return proxyDelegate;
    }
}