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Dubbo Network Call background We know that the general flow of Dubbo remote calls (consumer processes) is as follows: Get a list of invoker s for this method from Dirctory A list of invoker s that meet the criteria is obtained by filtering router routes invoker called with Cluster fault tolerance Final invoker filtered by loadBalance filter ch ...

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 ...

1. Demand scenario Migrate part of the data in the ys table in HBase to the ys? Mr table through Mapreduce 2. Coding 1) build ReadysMapreduce class to read data in ys table package cn.ysjh; import java.io.IOException; import org.apache.hadoop.hbase.Cell; import org.apache.hadoop.hbase.CellUtil; import org.apache.hadoop.hb ...

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), ...

(Note: This is just the beginning of the combination of swoole and TP5. I think there will be more holes to step on when they are deeply integrated! ) First go TP official website Download framework   General overview:  Create a new server folder in the root directory of the project,The content of http_server.php is as follows (it can be direc ...

Summary You can use the rule engine to forward IOT platform data to a message queue (RocketMQ) for storage.This enables the full-link, highly reliable transmission of messages from devices, Internet of Things platforms, RocketMQ to application servers.Starting with the creation of products and devices on the Internet of Things platform, the tex ...

I. flume installation 1. decompress tar -zxvf flume-ng-1.6.0-cdh5.15.0.tar.gz -C /opt/modules/ 2. Change name mv apache-flume-1.6.0-cdh5.15.0-bin/ flume-1.6.0-cdh5.15.0-bin/ 3. Configuration file: flume-env.sh export JAVA_HOME=/opt/modules/jdk1.8.0_151 4. Test success bin/flume-ng version //Result: Flume 1.6.0-cdh5. ...

I. Introduction of related packages and dependencies I use the method of slf4j+log4j to introduce pom files. There is another method of Commons logging + log4j. I will not talk about it here. You can refer to the materials you need. <!--slf4j+log4j--> <dependency> <groupId>org.slf4j</groupId> &lt ...

Catalog 1. Establishment of file upload environment 2. File upload code implementation 3. About downloading @ Hey, Xiong dei, you have to know that in Web development, file upload and download are very common functions. As for file upload, browser upload [file transfer in the form of stream] - serve ...

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 ...