Class DockerUtils

src/main/java/com/baidu/fsg/uid/utils/DockerUtils.java:27–104

DockerUtils @author yutianbao

 * @author yutianbao
 */
public abstract class DockerUtils {
    private static final Logger LOGGER = LoggerFactory.getLogger(DockerUtils.class);

    /** Environment param keys */
    private static final String ENV_KEY_HOST = "JPAAS_HOST";
    private static final String ENV_KEY_PORT = "JPAAS_HTTP_PORT";
    private static final String ENV_KEY_PORT_ORIGINAL = "JPAAS_HOST_PORT_8080";

    /** Docker host & port */
    private static String DOCKER_HOST = "";
    private static String DOCKER_PORT = "";

    /** Whether is docker */
    private static boolean IS_DOCKER;

    static {
        retrieveFromEnv();
    }

    /**
     * Retrieve docker host
     * 
     * @return empty string if not a docker
     */
    public static String getDockerHost() {
        return DOCKER_HOST;
    }

    /**
     * Retrieve docker port
     * 
     * @return empty string if not a docker
     */
    public static String getDockerPort() {
        return DOCKER_PORT;
    }

    /**
     * Whether a docker
     * 
     * @return
     */
    public static boolean isDocker() {
        return IS_DOCKER;
    }

    /**
     * Retrieve host & port from environment
     */
    private static void retrieveFromEnv() {
        // retrieve host & port from environment
        DOCKER_HOST = System.getenv(ENV_KEY_HOST);
        DOCKER_PORT = System.getenv(ENV_KEY_PORT);

        // not found from 'JPAAS_HTTP_PORT', then try to find from 'JPAAS_HOST_PORT_8080'
        if (StringUtils.isBlank(DOCKER_PORT)) {
            DOCKER_PORT = System.getenv(ENV_KEY_PORT_ORIGINAL);
        }