com.taotao.boot.idgenerator.uid.utils.DockerUtils Maven / Gradle / Ivy
package com.taotao.boot.idgenerator.uid.utils;
import com.taotao.boot.common.utils.log.LogUtils;
import org.apache.commons.lang3.StringUtils;
/**
* DockerUtils
*
*/
public abstract class DockerUtils {
/** 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);
}
boolean hasEnvHost = StringUtils.isNotBlank(DOCKER_HOST);
boolean hasEnvPort = StringUtils.isNotBlank(DOCKER_PORT);
// docker can find both host & port from environment
if (hasEnvHost && hasEnvPort) {
IS_DOCKER = true;
// found nothing means not a docker, maybe an actual machine
} else if (!hasEnvHost && !hasEnvPort) {
IS_DOCKER = false;
} else {
LogUtils.error("[uid-gen] Missing host or port from env for Docker. host:{}, port:{}", DOCKER_HOST, DOCKER_PORT);
throw new RuntimeException(
"Missing host or port from env for Docker. host:" + DOCKER_HOST + ", port:" + DOCKER_PORT);
}
}
}