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In this tutorial, you'll learn how to configure and dynamically update the access control list (ACL) of the Hyperledger Fabric block chain.The tutorial is divided into two parts: 1. Understanding and configuring the access control list for Hyperledger Fabric 2. Dynamically updating the access control list in the channel configuration.We will in ...

When developing, we will inevitably encounter the situation of loading pictures. When the size of pictures is smaller than the size of ImageView, we can certainly happy to load the display directly. But if we load a picture that is much larger than the size of the ImageView, displaying it directly with the ImageView will have a bad visual effe ...

Installation and use of PHPMailer class library Download PHPMailer class library and use demo: Address: https://download.csdn.net/download/fenqing666/10681461 Preconditions: First: remove the following two semicolons from php.ini                ;extension=php_sockets.dll                ;extension=php_openssl.dll And restar ...

Boot BossGroup and WorkerGroup: the former is responsible for receiving client connections, and the latter is responsible for network reading and writing. All types are NioEventLoopGroup NioEventLoopGroup is equivalent to an event loop group, which contains multiple event loops. Each event loop is NioEventLoop NioEventLoop refers to a thr ...

Get the network pictures through get request -- mainly for future reference and making a note Task requirements: 1. Create a new layout file, and add two controls: Button and ImageView to the layout file 2. Create a new GetPictThread to implement the Runnable interface (1) define a handler to transfer data to the main threa ...

Eureka is responsible for service discovery in Spring Cloud. Service discovery needs to solve the problem of how to find the location of service provider in the network. Server side In the file menu of the Spring Tool Suite, click new Spring Starter Project. Then add the @ EnableEurekaServer tag to the entry method. import org.springframework.b ...

Hyperledger Fabric is a blockchain that emphasizes operation and maintenance. Since version 1.4, Fabric has included features for operation and maintenance of peer and orderer nodes. This tutorial will introduce how to configure the operation and maintenance management service of Fabric network nodes, and how to use Prometheus and statsD/Graphi ...

1. Overview The SonarQube platform consists of four components: A SonarQube Server starts three main processes: Web server for developers and administrators to browse high-quality snapshots and configure SonarQube instances Search Server based on Elasticsearch searches backwards from the UI Compute Engine server, responsible for processing c ...

1. What is base64 encoding Due to the limitations of some network communication protocols, you must use the window.btoa() method to encode the original data before sending. The receiver uses the method equivalent to window.atob() to decode the received base64 data and get the original data. For example, some data containing co ...

More catalog knowledge http://blog.51cto.com/yangrong/1288072 /etc/fstab　　 Machine automatically mounts partition / disk, specifies which partition / device and where to mount 1 [root@oldboy ~]# cat /etc/fstab 2 3 # 4 # /etc/fstab 5 # Created by anaconda on Sun Aug 12 17:26:53 2018 6 # 7 # Accessible filesystems, by reference, are m ...