Programmer Think

reflex Reflection is one of the characteristics of Java programming language. It allows running Java programs to check themselves, or "self audit", and can directly operate the internal properties and methods of the program. Some classes of reflection Field class: represents the object properties obtained in reflection Constructor ...

preface Recently, I was accidentally isolated, had a holiday to think about it, and decided to start in the handwritten sequence. This sequence had an idea when looking at the source code of Nacous and gateway, but it has not been implemented. Take advantage of isolation. Introduction to essential knowledge Serializable and Deserialize Ser ...

1. Evolution process of software architecture The development of software architecture has experienced the evolution process from single architecture, vertical architecture, SOA architecture to micro service architecture. Let's learn about these architectures respectively. 1.1 single structure Architecture Description: All functions ar ...

Modification version required: 1. Start two servers to automatically register IP and port information with Zookeeper 2. When the client starts, it obtains the node information of all service providers from Zookeeper, and the client establishes a connection with each server 3. After a server goes offline, the Zookeeper registration list will ...

In the previous two articles, we learned about the SPI mechanism in RPC and dubbo. In order to further understand the whole process of RPC call, in this article, we will implement simple SPI mechanism, zookeeper registry, load balancing and other functions. I will put the link of the source code at the end of the article. If necessary, you c ...

[premise] The content described in this article is based on Dubbo version 2.7.3 [text] As shown above, in the previous article com. alibaba. There is a memory leak in fastjson In this article, we explained that there is a memory leak in threadLocals of threads. Look closely at the figure above. There is another place where 662.19KB of memor ...

2021SC@SDUSC rpc procedure in seafile According to the previous analysis, I already know that one of the functions of seafile server is to provide rpc to the front end, that is, seahub. Therefore, in the source code of seahub, there should also be a call to searpc. Next, the relevant parts of seahub source code are analyzed. It is learned fr ...

1. Preface The previous article analyzes how the Consumer initiates an RPC call, and how the Request object Request is encoded from the client, then sent to the server through the network, and then decoded by the server. Next, it starts to analyze how the service Provider handles RPC call requests. ​ This paper will analyze from two dimension ...

Relationship of each node: The Invoker here is an abstraction of the callable Service of the Provider. The Invoker encapsulates the Provider address and Service interface information; Directory represents multiple invokers and can be regarded as a List. However, unlike List, its value may change dynamically, such as pushing changes by the reg ...

RPC call: the client serializes and transmits the service call interface, method name, method type parameters and method parameter values to the server, and the server reads the information in reverse sequence for proxy call. Summary: (1) When the client starts, it will pull and subscribe to the corresponding service list from the registry, and ...