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The fuse mechanism is a self-protection mechanism. When there are a large number of requests piled up and the service is unable to handle them immediately, the fuse mechanism can decide to discard the requests to ensure that its resources are not exhausted and downtime. The fuse is usually used on the service consumers. When th ...

spring boot packs all dependent jars into one jar by default when it packs and runs jars. This is inconvenient because the packaged jar packages are relatively large and need to be uploaded to the server for a long time. Here, we can use the assembly plug-in to package dependent jars into external independent folders. In the future, we only nee ...

Docker deploys spring cloud project Eureka server 1 create Eureka server project Create the parent project cloud demo, whose pom.xml is as follows: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http:// ...

To: https://segmentfault.com/a/11900013532009 In the last article Spring boot application startup principle (1) embedding startup script into jar The principle of how springboot integrates the startup script and Runnable Jar into Executable Jar is introduced in so that the generated jar/war file can be started directly This article will show h ...

In the previous article, we talked about how to consume services through RestTemplate+Ribbon. This article mainly talks about how to consume services through Feign. 1. Introduction to FeignFeign is a declarative pseudo-Http client that makes it easier to write Http clients.With Feign, you only need to create an interface and annotate it.It has ...

Recently, redis cache has been used in our work, so we share something we have summarized. This article uses StringRedisTemplate for learning. The value here is: (1) StringRedisTemplate needs to be serialized when performing batch deletion operation, (2) the update operation is the same as the add operation, and the next code is as follows:1. ...

prerequisite: 1. Install jdk1.8 (under Windows Environment) 2. Install maven 3.3.9 (under Windows Environment) 3. Install eclipse (under Windows Environment) 4. Install hadoop (under Linux environment) Question: The input file is: EMP.csv. The contents of the EMP.csv file are as follows: SAL is employee salary (int type), ...

This article discusses how to use RocketMQ Binder to subscribe and publish Spring Cloud application messages. introduce RocketMQ It is an open source distributed message system. Based on the highly available distributed cluster technology, it provides low latency and highly reliable message publishing and subscription services, which are widely ...

In the development, some asynchronous operations will obviously speed up the execution speed and bring better experience, but at the same time, it also increases the development complexity. If you want to use many threads, you must understand from these aspects wait() notify() notifyall() method of thread Thread returns Future asynchronously ...

In development, we often encounter the scenario of calculating the distance between two points (longitude and latitude) or calculating the nearest store. Here is a simple implementation of how to calculate the distance between two longitudes and latitudes. 1. Import geodesy's maven dependency or download the jar package from Alibaba cloud's mav ...