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Broker: equivalent to an ActiveMQ server instance Command line start parameter instance: 1. / ActiveMQ start: use the default activemq.xml to start 2. / ActiveMQ start xbean: File:.. / conf / activemq-2.xml use the specified configuration file to start 3. If file is not specified, that is, xbean:activemq-2.xml, then XML must b ...

Third party login - Baidu Log in from a third-party baidu account Prerequisite: have its own server, domain name. First register an account in Baidu Developer Center Then enter the application management interface under the account, Create a project, and the API Key and Secret Key will be given after the project is cre ...

Step 1: write maven dependency (3.6 is a stable version, which can be used in production environment) <!-- https://mvnrepository.com/artifact/org.apache.poi/poi --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version&g ...

The partitioner of MapReduce is HashPartitionerPrinciple: first, hash the key output from the map, then reduce the number of tasks on the module. According to the result, determine the output kv pair, which is taken by the matching reduce task.Custom partition needs to inherit the Partitioner and copy the getpariton() methodCustom partition cl ...

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 ...

In order to realize the function of generating channel package by one key in java, we need to make preparations in advance. There are about three points as follows 1. Put the channel number that needs to be generated in the excel file when it is ready 2. You need to download two jar packages, commons-compress-1.16.1.jar and jxl. ...

order This paper mainly studies nimbus.seeds parameter of storm client NIMBUS_SEEDS storm-core-1.1.0-sources.jar!/org/apache/storm/Config.java /** * The host that the master server is running on, added only for backward compatibility, * the usage deprecated in favor of nimbus.seeds config. */ @Deprecated @isString ...

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:// ...

order This paper focuses on the remoting toomuchrequestexception of rocketmq RemotingTooMuchRequestException rocketmq-remoting-4.6.0-sources.jar!/org/apache/rocketmq/remoting/exception/RemotingTooMuchRequestException.java public class RemotingTooMuchRequestException extends RemotingException { private static final long serialVersionUID = 43 ...