private void initSentinelConfig(SentinelProperties properties, String applicationName) {

		if (StringUtils.isEmpty(System.getProperty(LogBase.LOG_DIR))
				&& StringUtils.isNotBlank(properties.getLog().getDir())) {
			System.setProperty(LogBase.LOG_DIR, properties.getLog().getDir());
		}
		if (StringUtils.isEmpty(System.getProperty(LogBase.LOG_NAME_USE_PID))
				&& properties.getLog().isSwitchPid()) {
			System.setProperty(LogBase.LOG_NAME_USE_PID,
					String.valueOf(properties.getLog().isSwitchPid()));
		}
		if (StringUtils.isEmpty(System.getProperty(SentinelConfig.APP_NAME_PROP_KEY))
				&& StringUtils.isNotBlank(applicationName)) {
			System.setProperty(SentinelConfig.APP_NAME_PROP_KEY, applicationName);
		}
		if (StringUtils.isEmpty(System.getProperty(TransportConfig.SERVER_PORT))
				&& StringUtils.isNotBlank(properties.getTransport().getPort())) {
			System.setProperty(TransportConfig.SERVER_PORT,
					properties.getTransport().getPort());
		}
		if (StringUtils.isEmpty(System.getProperty(TransportConfig.CONSOLE_SERVER))
				&& StringUtils.isNotBlank(properties.getTransport().getDashboard())) {
			System.setProperty(TransportConfig.CONSOLE_SERVER,
					properties.getTransport().getDashboard());
		}
		if (StringUtils.isEmpty(System.getProperty(TransportConfig.HEARTBEAT_INTERVAL_MS))
				&& StringUtils
				.isNotBlank(properties.getTransport().getHeartbeatIntervalMs())) {
			System.setProperty(TransportConfig.HEARTBEAT_INTERVAL_MS,
					properties.getTransport().getHeartbeatIntervalMs());
		}
		if (StringUtils.isEmpty(System.getProperty(TransportConfig.HEARTBEAT_CLIENT_IP))
				&& StringUtils.isNotBlank(properties.getTransport().getClientIp())) {
			System.setProperty(TransportConfig.HEARTBEAT_CLIENT_IP,
					properties.getTransport().getClientIp());
		}
		if (StringUtils.isEmpty(System.getProperty(SentinelConfig.CHARSET))
				&& StringUtils.isNotBlank(properties.getMetric().getCharset())) {
			System.setProperty(SentinelConfig.CHARSET,
					properties.getMetric().getCharset());
		}
		if (StringUtils
				.isEmpty(System.getProperty(SentinelConfig.SINGLE_METRIC_FILE_SIZE))
				&& StringUtils.isNotBlank(properties.getMetric().getFileSingleSize())) {
			System.setProperty(SentinelConfig.SINGLE_METRIC_FILE_SIZE,
					properties.getMetric().getFileSingleSize());
		}
		if (StringUtils
				.isEmpty(System.getProperty(SentinelConfig.TOTAL_METRIC_FILE_COUNT))
				&& StringUtils.isNotBlank(properties.getMetric().getFileTotalCount())) {
			System.setProperty(SentinelConfig.TOTAL_METRIC_FILE_COUNT,
					properties.getMetric().getFileTotalCount());
		}
		if (StringUtils.isEmpty(System.getProperty(SentinelConfig.COLD_FACTOR))
				&& StringUtils.isNotBlank(properties.getFlow().getColdFactor())) {
			System.setProperty(SentinelConfig.COLD_FACTOR,
					properties.getFlow().getColdFactor());
		}
		if (StringUtils.isNotBlank(properties.getBlockPage())) {
			setConfig(BLOCK_PAGE_URL_CONF_KEY, properties.getBlockPage());
		}

		// earlier initialize
		if (properties.isEager()) {

			InitExecutor.doInit();
		}

	}
@author yuluo
@author <a href="mailto:yuluo08290126@gmail.com">yuluo</a>
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-sentinel/src/main/java/com/alibaba/cloud/sentinel/custom/context/SentinelApplicationContextInitializer.java