using Enum replace of String

spring-cloud-alibaba-sentinel-datasource/src/main/java/org/springframework/cloud/alibaba/sentinel/datasource/config/AbstractDataSourceProperties.java

@@ -19,7 +19,7 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
 public class AbstractDataSourceProperties {
 
 	private String dataType = "json";
-	private String ruleType;
+	private RuleType ruleType;
 	private String converterClass;
 	@JsonIgnore
 	protected String factoryBeanName;
@@ -36,11 +36,11 @@ public class AbstractDataSourceProperties {
 		this.dataType = dataType;
 	}
 
-	public String getRuleType() {
+	public RuleType getRuleType() {
 		return ruleType;
 	}
 
-	public void setRuleType(String ruleType) {
+	public void setRuleType(RuleType ruleType) {
 		this.ruleType = ruleType;
 	}
 
@@ -61,15 +61,10 @@ public class AbstractDataSourceProperties {
 	}
 
 	public void preCheck(String dataSourceName) {
-		if (!RuleType.getByName(this.getRuleType()).isPresent()) {
-			throw new IllegalArgumentException(
-					"[Sentinel Starter] DataSource " + dataSourceName
-							+ " get error ruleType [" + this.getRuleType() + "]");
-		}
 	}
 
 	public void postRegister(AbstractDataSource dataSource) {
-		switch (RuleType.getByName(this.getRuleType()).get()) {
+		switch (this.getRuleType()) {
 		case FLOW:
 			FlowRuleManager.register2Property(dataSource.getProperty());
 			break;

spring-cloud-alibaba-sentinel-datasource/src/main/java/org/springframework/cloud/alibaba/sentinel/datasource/config/NacosDataSourceProperties.java

@@ -128,10 +128,10 @@ public class NacosDataSourceProperties extends AbstractDataSourceProperties {
 				.getProperty(SentinelDataSourceConstants.PROJECT_NAME) + "-" + type);
 		result.setGroupId("nacos-sentinel");
 		if (type.equals(RuleType.FLOW.getName())) {
-			result.setRuleType(RuleType.FLOW.getName());
+			result.setRuleType(RuleType.FLOW);
 		}
 		else {
-			result.setRuleType(RuleType.DEGRADE.getName());
+			result.setRuleType(RuleType.DEGRADE);
 		}
 		return result;
 	}

spring-cloud-alibaba-sentinel/src/main/java/org/springframework/cloud/alibaba/sentinel/custom/SentinelDataSourceHandler.java

@@ -18,7 +18,6 @@ import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.context.event.ApplicationStartedEvent;
 import org.springframework.cloud.alibaba.sentinel.SentinelConstants;
 import org.springframework.cloud.alibaba.sentinel.SentinelProperties;
-import org.springframework.cloud.alibaba.sentinel.datasource.RuleType;
 import org.springframework.cloud.alibaba.sentinel.datasource.SentinelDataSourceConstants;
 import org.springframework.cloud.alibaba.sentinel.datasource.config.AbstractDataSourceProperties;
 import org.springframework.cloud.alibaba.sentinel.datasource.config.DataSourcePropertiesConfiguration;
@@ -199,7 +198,7 @@ public class SentinelDataSourceHandler {
 						// 'sentinel-{converterType}-{ruleType}-converter'
 						builder.addPropertyReference("converter",
 								"sentinel-" + propertyValue.toString() + "-"
-										+ dataSourceProperties.getRuleType()
+										+ dataSourceProperties.getRuleType().getName()
 										+ "-converter");
 					}
 				}
@@ -220,7 +219,7 @@ public class SentinelDataSourceHandler {
 				.getBean(dataSourceName);
 
 		logAndCheckRuleType(newDataSource, dataSourceName,
-				RuleType.getByName(dataSourceProperties.getRuleType()).get().getClazz());
+				dataSourceProperties.getRuleType().getClazz());
 
 		// register property in RuleManager
 		dataSourceProperties.postRegister(newDataSource);