6.Sentinel源码分析—Sentinel是如何动态加载配置限流的？ (4)

AbstractDataSource

public T loadConfig() throws Exception { return loadConfig(readSource()); } public T loadConfig(S conf) throws Exception { T value = parser.convert(conf); return value; }

父类的loadConfig会调用子类的readSource读取配置信息，然后调用parser.convert进行反序列化。

ZookeeperDataSource#readSource

public String readSource() throws Exception { if (this.zkClient == null) { throw new IllegalStateException("Zookeeper has not been initialized or error occurred"); } String configInfo = null; ChildData childData = nodeCache.getCurrentData(); if (null != childData && childData.getData() != null) { configInfo = new String(childData.getData()); } return configInfo; }

这个方法是用来读取zk节点里面的信息。

最后FlowRuleManager.register2Property的方法就和上面的文件动态配置的是一样的了。

java学习笔记/SENTINEL