Programming VIP

This article focuses on the service tracking component zipkin, which Spring Cloud Sleuth integrates. 1. Introduction Add sleuth to the classpath of a Spring Boot application (see belowfor Maven and Gradle examples), and you will see the correlation databeing collected in logs, as long as you are logging requests. --- From the official website ...

In order to solve this problem, I Baidu many methods, but many methods have no effect. Method 1: If you are installing phpstudy, then 1. You need to go to php extension to open the extension. 2. Go to php.ini and remove the ";" before "extension=php_openssl.dll". If not, add extension=php_openssl.dll. 3. Copy libeay32.dll ...

The usage scenario of for update has been introduced in Spring Date JPA for update. For more information, see the blog: https://blog.csdn.net/zc_ad/article/details/83578487 , we will introduce the usage scenario in mybatis here. Mybatis plus is used. Some basic tutorials have been done before. Address: https://blog.csdn.net/zc_ ...

order This paper mainly studies the HAClient of rocketmq HAClient rocketmq-all-4.6.0-source-release/store/src/main/java/org/apache/rocketmq/store/ha/HAService.java class HAClient extends ServiceThread { private static final int READ_MAX_BUFFER_SIZE = 1024 * 1024 * 4; private final AtomicReference<String> masterAddress ...

This example implements the capture of the latest movie source name list and the download address of the detail page of a movie website. webmagic is an open-source Java vertical crawler framework. Its goal is to simplify the development process of crawlers and let developers focus on the development of logical functions. WebMagic features: Ful ...

Requirement: count the total number of occurrences of each word in a given stack of text files As shown in the figure below is the analysis chart of MapReduce statistical WordCount: The map stage reads the data from the file, the line number is the key, and the read value of each line is the value. Each key/value pair is ou ...

1. Business requirements Calculate a cell phone number (base station, dwell time), (current longitude, current latitude) by holding the cell phone number's dwell time log and base station information at each base station The log information generated by connecting the mobile phone to the base station is similar to the following: ...

Sleuth brief introduction Microservice architecture divides services by services. Exposed interfaces may require many services to cooperate to complete an interface function. If any service on the link has problems, interface calls will fail. At this time, it is very difficult to find the microservices with problems. The main ...

Development environment: InteliJ IDEA Operating system: Mac OS Mojave Elastic search version: Alibaba cloud 5.5.3 with x-pack Client version: REST Client 5.5.3 1. Create Alibaba cloud ES instance in advance and open the public address access white list. 2. Pre create index and mapping (using Kibana Dev Tools) PUT index_test { "mappings": ...

At the beginning, I used eclipse development tools. After installing Scala, download the Scala Eclipse Plug-in and copy the feature s and plugin s in the compression package to the corresponding directory of eclipse tools. However, using Eclipse Maven to develop Scala projects is a bit of a pain. So, toss to toss to give up and ...