这期内容当中小编将会给大家带来有关nacos中DelegateConsistencyServiceImpl的作用是什么，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/consistency/ConsistencyService.java
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public interface ConsistencyService {
/**
* Put a data related to a key to Nacos cluster
*
* @param key key of data, this key should be globally unique
* @param value value of data
* @throws NacosException
* @see
*/
void put(String key, Record value) throws NacosException;
/**
* Remove a data from Nacos cluster
*
* @param key key of data
* @throws NacosException
*/
void remove(String key) throws NacosException;
/**
* Get a data from Nacos cluster
*
* @param key key of data
* @return data related to the key
* @throws NacosException
*/
Datum get(String key) throws NacosException;
/**
* Listen for changes of a data
*
* @param key key of data
* @param listener callback of data change
* @throws NacosException
*/
void listen(String key, RecordListener listener) throws NacosException;
/**
* Cancel listening of a data
*
* @param key key of data
* @param listener callback of data change
* @throws NacosException
*/
void unlisten(String key, RecordListener listener) throws NacosException;
/**
* Tell the status of this consistency service
*
* @return true if available
*/
boolean isAvailable();
}ConsistencyService定义了put、remove、get、listen、unlisten、isAvailable方法
nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/consistency/DelegateConsistencyServiceImpl.java
@Service("consistencyDelegate")
public class DelegateConsistencyServiceImpl implements ConsistencyService {
@Autowired
private PersistentConsistencyService persistentConsistencyService;
@Autowired
private EphemeralConsistencyService ephemeralConsistencyService;
@Override
public void put(String key, Record value) throws NacosException {
mapConsistencyService(key).put(key, value);
}
@Override
public void remove(String key) throws NacosException {
mapConsistencyService(key).remove(key);
}
@Override
public Datum get(String key) throws NacosException {
return mapConsistencyService(key).get(key);
}
@Override
public void listen(String key, RecordListener listener) throws NacosException {
// this special key is listened by both:
if (KeyBuilder.SERVICE_META_KEY_PREFIX.equals(key)) {
persistentConsistencyService.listen(key, listener);
ephemeralConsistencyService.listen(key, listener);
return;
}
mapConsistencyService(key).listen(key, listener);
}
@Override
public void unlisten(String key, RecordListener listener) throws NacosException {
mapConsistencyService(key).unlisten(key, listener);
}
@Override
public boolean isAvailable() {
return ephemeralConsistencyService.isAvailable() && persistentConsistencyService.isAvailable();
}
private ConsistencyService mapConsistencyService(String key) {
return KeyBuilder.matchEphemeralKey(key) ? ephemeralConsistencyService : persistentConsistencyService;
}
}DelegateConsistencyServiceImpl实现了ConsistencyService接口；其put、remove、get、listen、unlisten方法内部都使用了mapConsistencyService来判断是使用ephemeralConsistencyService还persistentConsistencyService；其isAvailable方法要求ephemeralConsistencyService及persistentConsistencyService都是available
ConsistencyService定义了put、remove、get、listen、unlisten、isAvailable方法；DelegateConsistencyServiceImpl实现了ConsistencyService接口；其put、remove、get、listen、unlisten方法内部都使用了mapConsistencyService来判断是使用ephemeralConsistencyService还persistentConsistencyService；其isAvailable方法要求ephemeralConsistencyService及persistentConsistencyService都是available
上述就是小编为大家分享的nacos中DelegateConsistencyServiceImpl的作用是什么了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。
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原文链接：https://my.oschina.net/go4it/blog/3103502
