Linchen-Xu commented on code in PR #13238:
URL: https://github.com/apache/dubbo/pull/13238#discussion_r1371554351
##########
dubbo-metadata/dubbo-metadata-report-redis/src/main/java/org/apache/dubbo/metadata/store/redis/RedisMetadataReport.java:
##########
@@ -207,4 +226,258 @@ private String
getMetadataStandalone(BaseMetadataIdentifier metadataIdentifier)
}
}
+ @Override
+ public boolean registerServiceAppMapping(String serviceInterface, String
defaultMappingGroup, String newConfigContent, Object ticket) {
+ try {
+ if (null!= ticket && !(ticket instanceof String)) {
+ throw new IllegalArgumentException("zookeeper publishConfigCas
requires stat type ticket");
+ }
+ String pathKey = buildMappingKey(defaultMappingGroup);
+
+ return storeMapping(pathKey, serviceInterface,
newConfigContent,(String)ticket);
+ } catch (Exception e) {
+ logger.warn(REGISTRY_ZOOKEEPER_EXCEPTION, "", "", "redis
publishConfigCas failed.", e);
+ return false;
+ }
+ }
+
+
+ private boolean storeMapping(String key, String field, String value,String
ticket) {
+ if (pool != null) {
+ return storeMappingStandalone(key, field, value, ticket);
+ } else {
+ return storeMappingInCluster(key, field, value, ticket);
+ }
+ }
+
+ private boolean storeMappingInCluster(String key, String field, String
value,String ticket) {
+ try (JedisCluster jedisCluster = new JedisCluster(jedisClusterNodes,
timeout, timeout, 2, password, new GenericObjectPoolConfig<>())) {
+ Jedis
jedis=jedisCluster.getConnectionFromSlot(JedisClusterCRC16.getSlot(key));
+ jedis.watch(key);
+ String oldValue = jedis.get(key);
+ if (null==oldValue||null==ticket||oldValue.equals(ticket)) {
+ Transaction transaction = jedis.multi();
+ transaction.hset(key,field,value);
+ List<Object> result=transaction.exec();
+ if(null!=result){
+ jedisCluster.publish(buildPubSubKey(field),value);
+ return true;
+ }
+ }
+ } catch (Throwable e) {
+ String msg = "Failed to put " + key + ":" + field + " to redis " +
value + ", cause: " + e.getMessage();
+ logger.error(TRANSPORT_FAILED_RESPONSE, "", "", msg, e);
+ throw new RpcException(msg, e);
+ }
+ return false;
+ }
+
+ private boolean storeMappingStandalone(String key, String field, String
value,String ticket) {
+ try (Jedis jedis = pool.getResource()) {
+ jedis.watch(key);
Review Comment:
watch可以考虑移到transaction里。一是因为watch的目的是为了保证在transaction期间key不被更改，二是watch之后需要手动执行[unwatch](https://redis.io/commands/unwatch/)（除非执行过discard或exec）。
建议改成：
```suggestion
Transaction transaction = jedis.multi();
transaction.watch(key);
...
```
或：
```suggestion
jedis.watch(key);
...
List<Object> result=transaction.exec();
return null!=result;
}
jedis.unwatch();
```
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