optimize ElasticJobTracingConfiguration

spring/boot-starter/src/main/java/org/apache/shardingsphere/elasticjob/spring/boot/job/ElasticJobProperties.java

@@ -31,6 +31,6 @@
 @Setter
 @ConfigurationProperties(prefix = "elasticjob")
 public class ElasticJobProperties {
-    
+
     private Map<String, ElasticJobConfigurationProperties> jobs = new LinkedHashMap<>();
 }

spring/boot-starter/src/main/java/org/apache/shardingsphere/elasticjob/spring/boot/tracing/ElasticJobTracingConfiguration.java

@@ -21,7 +21,6 @@
 import org.apache.shardingsphere.elasticjob.kernel.tracing.config.TracingConfiguration;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Qualifier;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -37,11 +36,11 @@
 @Configuration(proxyBeanMethods = false)
 @EnableConfigurationProperties(TracingProperties.class)
 public class ElasticJobTracingConfiguration {
-    
+
     @Configuration(proxyBeanMethods = false)
     @ConditionalOnProperty(name = "elasticjob.tracing.type", havingValue = "RDB")
     static class RDBTracingConfiguration {
-        
+
         /**
          * Create a bean of tracing DataSource.
          *
@@ -59,7 +58,7 @@ public DataSource tracingDataSource(final TracingProperties tracingProperties) {
             BeanUtils.copyProperties(dataSource, tracingDataSource);
             return tracingDataSource;
         }
-        
+
         /**
          * Create a bean of tracing configuration.
          *
@@ -68,9 +67,11 @@ public DataSource tracingDataSource(final TracingProperties tracingProperties) {
          * @return a bean of tracing configuration
          */
         @Bean
-        @ConditionalOnBean(DataSource.class)
-        public TracingConfiguration<DataSource> tracingConfiguration(@Qualifier("dataSource") final DataSource dataSource,
+        public TracingConfiguration<DataSource> tracingConfiguration(@Qualifier("dataSource") @Nullable final DataSource dataSource,
                                                                      @Qualifier("tracingDataSource") @Nullable final DataSource tracingDataSource) {
+            if (dataSource == null && tracingDataSource == null) {
+                throw new IllegalArgumentException("Neither dataSource nor tracingDataSource bean is required");
+            }
             return new TracingConfiguration<>("RDB", null == tracingDataSource ? dataSource : tracingDataSource);
         }
     }