src/main/java/com/alipay/remoting/rpc/RpcAddressParser.java
private Url tryGet(String url) {
        SoftReference<Url> softRef = Url.parsedUrls.get(url);
        return (null == softRef) ? null : softRef.get();
    }
private Url tryGet(String url) {
        SoftReference<Url> softRef = Url.parsedUrls.get(url);
        return (null == softRef) ? null : softRef.get();
    }
try get from cache

@param url
@return