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In the previous section, we mainly explained how to dynamically modify parameters using dubbo-admin. This section will focus on another implementation detail in cluster implementation: routing mechanism, the main purpose of which is to refresh service providers from all known service providers according to routing rules when making service call ...

Jdchain is an open-source blockchain platform of JD science and Technology Co., Ltd. the goal is to realize a general blockchain framework system for enterprise application scenarios, which can serve as enterprise level infrastructure and provide efficient, flexible and secure solutions for business innovation. The reason why jdchain is chosen ...

In the last lesson, I completed the back-end construction of netty and completed the simple http request response. Today, I will complete the group chat function with the front-end websocket. If you don't want to talk much, let's start with the picture above: Front-end construction Do not use complex build tools to start static pages directly ...

1. What is ACL? ACL is short for access control list, commonly known as access control list.Access control basically involves the concepts of users, resources, privileges, roles, and so on. Which objects do these correspond to in RocketMQ? user User is the basic element of access control, and it is not difficult to understand. RocketMQ ACL will ...

This article follows Log Addition Process for Source Analysis RocketMQ DLedger Continue Leader's process of handling client append requests, one of the most critical aspects: log replication. DLedger multi-copy log forwarding is implemented by DLedger Entry Pusher, which will be described in detail next. Warm Tip: Due to the length of this art ...

There are many kinds of Netty decoders, such as length-based, divider-based, private protocols. However, the overall thinking is the same. Packet disassembly idea: When the data meets the decoding conditions, it is disassembled. Put it in an array. It is then sent to the business handler for processing. Half-package idea: When the data read i ...

In the previous section, we analyzed the process of calling an interface. When the interface returns data, Dubbo needs to tell the client which interface it is calling. What happens when Dubbo responds?There is the following code in the com.alibaba.d ...

In the previous section, we analyzed service exposure. In this section, we analyzed how Dubbo handles consumer requests. Let's review the com.alibaba.dubbo.remoting.transport.netty4.NettyServer#doOpen method protected void com.alibaba.dubbo.remoting. ...

In the previous article, we analyzed the accept process in the process SelectedKey method. This article will analyze the read process in the work thread. private static void processSelectedKey(SelectionKey k, AbstractNioChannel ch) { final NioUnsafe unsafe = ch.unsafe(); //Check the SelectionKey Is it valid? If it is invalid, close ...

Read through this article, you will understand1. How netty accepts new requests2. How netty assigns reactor threads to new requests3. How netty adds ChannelHandler to each new connection reactor thread in netty There are two types of reactor threads at the core of netty. They can be regarded as two types of engines in netty, which drive the w ...