add jsr 303 validation for SentinelProperties

spring-cloud-alibaba-sentinel-datasource/pom.xml

@@ -83,6 +83,13 @@
             <optional>true</optional>
         </dependency>
 
+        <dependency>
+            <groupId>org.hibernate.validator</groupId>
+            <artifactId>hibernate-validator</artifactId>
+            <scope>provided</scope>
+            <optional>true</optional>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

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

@@ -1,6 +1,10 @@
 package org.springframework.cloud.alibaba.sentinel.datasource.config;
 
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
 import org.springframework.cloud.alibaba.sentinel.datasource.RuleType;
+import org.springframework.util.Assert;
 
 import com.alibaba.csp.sentinel.datasource.AbstractDataSource;
 import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRuleManager;
@@ -18,7 +22,9 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
  */
 public class AbstractDataSourceProperties {
 
+    @NotEmpty
 	private String dataType = "json";
+	@NotNull
 	private RuleType ruleType;
 	private String converterClass;
 	@JsonIgnore
@@ -61,6 +67,7 @@ public class AbstractDataSourceProperties {
 	}
 
 	public void preCheck(String dataSourceName) {
+
 	}
 
 	public void postRegister(AbstractDataSource dataSource) {

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

@@ -1,5 +1,7 @@
 package org.springframework.cloud.alibaba.sentinel.datasource.config;
 
+import javax.validation.constraints.NotEmpty;
+
 import org.springframework.cloud.alibaba.sentinel.datasource.factorybean.ApolloDataSourceFactoryBean;
 
 /**
@@ -10,7 +12,9 @@ import org.springframework.cloud.alibaba.sentinel.datasource.factorybean.ApolloD
  */
 public class ApolloDataSourceProperties extends AbstractDataSourceProperties {
 
+    @NotEmpty
 	private String namespaceName;
+    @NotEmpty
 	private String flowRulesKey;
 	private String defaultFlowRuleValue;
 

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

@@ -2,6 +2,8 @@ package org.springframework.cloud.alibaba.sentinel.datasource.config;
 
 import java.io.IOException;
 
+import javax.validation.constraints.NotEmpty;
+
 import org.springframework.cloud.alibaba.sentinel.datasource.factorybean.FileRefreshableDataSourceFactoryBean;
 import org.springframework.util.ResourceUtils;
 import org.springframework.util.StringUtils;
@@ -14,6 +16,7 @@ import org.springframework.util.StringUtils;
  */
 public class FileDataSourceProperties extends AbstractDataSourceProperties {
 
+    @NotEmpty
 	private String file;
 	private String charset = "utf-8";
 	private long recommendRefreshMs = 3000L;

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

@@ -1,5 +1,7 @@
 package org.springframework.cloud.alibaba.sentinel.datasource.config;
 
+import javax.validation.constraints.NotEmpty;
+
 import org.springframework.cloud.alibaba.sentinel.datasource.RuleType;
 import org.springframework.cloud.alibaba.sentinel.datasource.SentinelDataSourceConstants;
 import org.springframework.cloud.alibaba.sentinel.datasource.factorybean.NacosDataSourceFactoryBean;
@@ -15,7 +17,11 @@ import org.springframework.util.StringUtils;
 public class NacosDataSourceProperties extends AbstractDataSourceProperties {
 
 	private String serverAddr;
+
+    @NotEmpty
 	private String groupId;
+
+    @NotEmpty
 	private String dataId;
 
 	// commercialized usage

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

@@ -1,5 +1,7 @@
 package org.springframework.cloud.alibaba.sentinel.datasource.config;
 
+import javax.validation.constraints.NotEmpty;
+
 import org.springframework.cloud.alibaba.sentinel.datasource.factorybean.ZookeeperDataSourceFactoryBean;
 
 /**
@@ -14,6 +16,7 @@ public class ZookeeperDataSourceProperties extends AbstractDataSourceProperties
 		super(ZookeeperDataSourceFactoryBean.class.getName());
 	}
 
+	@NotEmpty
 	private String serverAddr;
 
 	private String path;

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

@@ -24,6 +24,7 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.NestedConfigurationProperty;
 import org.springframework.cloud.alibaba.sentinel.datasource.config.DataSourcePropertiesConfiguration;
 import org.springframework.core.Ordered;
+import org.springframework.validation.annotation.Validated;
 
 import com.alibaba.csp.sentinel.config.SentinelConfig;
 import com.alibaba.csp.sentinel.log.LogBase;
@@ -36,6 +37,7 @@ import com.alibaba.csp.sentinel.transport.config.TransportConfig;
  * @author <a href="mailto:fangjian0423@gmail.com">Jim</a>
  */
 @ConfigurationProperties(prefix = SentinelConstants.PROPERTY_PREFIX)
+@Validated
 public class SentinelProperties {
 
 	/**