com.renatodelgaudio.awsupdate.EnvUtil.java Source code

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Here is the source code for com.renatodelgaudio.awsupdate.EnvUtil.java

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/**
 * Copyright (c) 2015 Renato Del Gaudio
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.renatodelgaudio.awsupdate;

import static org.apache.commons.lang.StringUtils.isBlank;
import static org.apache.commons.lang.StringUtils.trim;

import java.io.File;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.amazonaws.auth.PropertiesCredentials;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.AmazonEC2Client;
import com.amazonaws.services.route53.AmazonRoute53;
import com.amazonaws.services.route53.AmazonRoute53Client;

public class EnvUtil {

    /**
     * This is the expected property passed to Java on boot <br>
     * e.g. java -DINSTALL_DIR=
     */
    public static final String PROP_INSTALL_DIR = "INSTALL_DIR";
    public static final String PROP_AWS_FILE_NAME = "aws.properties";

    private final static Logger log = LoggerFactory.getLogger(EnvUtil.class);

    private EnvUtil() {
    }

    /*
     * It returns the installation path ending with either / or \
     */
    public static String INSTALL_DIR() {
        String root = System.getProperty(PROP_INSTALL_DIR);

        if (isBlank(root)) {
            log.error(
                    "Environment not initiazed properly. Please make sure Java is started with a not empty value for -D"
                            + PROP_INSTALL_DIR);
            throw new ConfigurationException("-D" + PROP_INSTALL_DIR + " is missing or empty. Program aborted");
        }
        String trim = trim(root);
        if (!StringUtils.endsWith(trim, "/") && !StringUtils.endsWith(trim, "\\"))
            trim += File.separator;

        return trim;
    }

    public static String getAwsFilePath() {
        return INSTALL_DIR() + PROP_AWS_FILE_NAME;
    }

    public static AmazonRoute53 buildRoute53(File aws) {
        AmazonRoute53 r53 = null;
        try {
            r53 = new AmazonRoute53Client(new PropertiesCredentials(aws));
        } catch (Exception e) {
            log.error("Cannot build AmazonRouter53Client", e);
            throw new ConfigurationException(e.getMessage());
        }
        return r53;
    }

    public static AmazonEC2 buildEC2(File aws) {
        AmazonEC2 ec2 = null;
        try {
            ec2 = new AmazonEC2Client(new PropertiesCredentials(aws));
        } catch (Exception e) {
            log.error("Cannot build AmazonEC2Client", e);
            throw new ConfigurationException(e.getMessage());
        }
        return ec2;
    }

}