fix 修复 dubbo redis元数据中心 获取监听器null问题

ruoyi-common/ruoyi-common-dubbo/src/main/java/org/apache/dubbo/metadata/store/redis/RedisMetadataReport.java

@@ -16,6 +16,7 @@
  */
 package org.apache.dubbo.metadata.store.redis;
 
+import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.common.config.configcenter.ConfigItem;
 import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
@@ -28,40 +29,17 @@ import org.apache.dubbo.metadata.MappingChangedEvent;
 import org.apache.dubbo.metadata.MappingListener;
 import org.apache.dubbo.metadata.MetadataInfo;
 import org.apache.dubbo.metadata.ServiceNameMapping;
-import org.apache.dubbo.metadata.report.identifier.BaseMetadataIdentifier;
-import org.apache.dubbo.metadata.report.identifier.KeyTypeEnum;
-import org.apache.dubbo.metadata.report.identifier.MetadataIdentifier;
-import org.apache.dubbo.metadata.report.identifier.ServiceMetadataIdentifier;
-import org.apache.dubbo.metadata.report.identifier.SubscriberMetadataIdentifier;
+import org.apache.dubbo.metadata.report.identifier.*;
 import org.apache.dubbo.metadata.report.support.AbstractMetadataReport;
 import org.apache.dubbo.rpc.RpcException;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
-import redis.clients.jedis.HostAndPort;
-import redis.clients.jedis.Jedis;
-import redis.clients.jedis.JedisCluster;
-import redis.clients.jedis.JedisPool;
-import redis.clients.jedis.JedisPoolConfig;
-import redis.clients.jedis.JedisPubSub;
-import redis.clients.jedis.Transaction;
+import redis.clients.jedis.*;
 import redis.clients.jedis.params.SetParams;
 import redis.clients.jedis.util.JedisClusterCRC16;
 
-import static org.apache.dubbo.common.constants.CommonConstants.CLUSTER_KEY;
-import static org.apache.dubbo.common.constants.CommonConstants.CYCLE_REPORT_KEY;
-import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_TIMEOUT;
-import static org.apache.dubbo.common.constants.CommonConstants.GROUP_CHAR_SEPARATOR;
-import static org.apache.dubbo.common.constants.CommonConstants.QUEUES_KEY;
-import static org.apache.dubbo.common.constants.CommonConstants.TIMEOUT_KEY;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static org.apache.dubbo.common.constants.CommonConstants.*;
 import static org.apache.dubbo.common.constants.LoggerCodeConstants.TRANSPORT_FAILED_RESPONSE;
 import static org.apache.dubbo.metadata.MetadataConstants.META_DATA_STORE_TAG;
 import static org.apache.dubbo.metadata.ServiceNameMapping.DEFAULT_MAPPING_GROUP;
@@ -479,8 +457,9 @@ public class RedisMetadataReport extends AbstractMetadataReport {
             logger.info("sub from redis:" + key + " message:" + msg);
             String applicationNames = getMappingData(buildMappingKey(DEFAULT_MAPPING_GROUP), msg);
             MappingChangedEvent mappingChangedEvent = new MappingChangedEvent(msg, getAppNames(applicationNames));
-            if (!listeners.get(msg).isEmpty()) {
-                for (MappingListener mappingListener : listeners.get(msg)) {
+            Set<MappingListener> mappingListeners = listeners.get(msg);
+            if (mappingListeners != null && !mappingListeners.isEmpty()) {
+                for (MappingListener mappingListener : mappingListeners) {
                     mappingListener.onEvent(mappingChangedEvent);
                 }
             }