maven | 易学教程

坐下坐下，基本操作（ZooKeeper 操作篇）

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本文作者：HelloGitHub- 老荀 Hi，这里是 HelloGitHub 推出的 HelloZooKeeper 系列，免费开源、有趣、入门级的 ZooKeeper 教程，面向有编程基础的新手。 ZooKeeper 是 Apache 软件基金会的一个软件项目，它为大型分布式计算提供开源的分布式配置服务、同步服务和命名注册。ZooKeeper 曾经是 Hadoop 的一个子项目，但现在是一个顶级独立的开源项目。 ZK 在实际开发工作中经常会用到，算的上是吃饭的家伙了，那可得玩透、用的趁手，要不怎么进阶和升职加薪呢？来和 HelloGitHub 一起学起来吧～本系列教程是从零开始讲解 ZooKeeper，内容从最基础的安装使用到背后原理和源码的讲解，整个系列希望通过有趣文字、诙谐的气氛中让 ZK 的知识“钻”进你聪明的大脑。本教程是开放式：开源、协作，所以不管你是新手还是老司机，我们都希望你可以加入到本教程的贡献中，一起让这个教程变得更好：新手：参与修改文中的错字、病句、拼写、排版等问题使用者：参与到内容的讨论和问题解答、帮助其他人的事情老司机：参与到文章的编写中，让你的名字出现在作者一栏项目地址：https://github.com/HelloGitHub-Team/HelloZooKeeper 今天我们会讲解下，如何使用 Java 代码客户端去操作

Maven ear plugin multiple artifacts content

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问题 Lets assume that I have a web project and several environments where it could be deployed. And I want Maven to build several artifacts at once (e.g. for dev an prod). I have an A-war module and an A-ear module (which contains A-war). Each war artifact could contain information which is related only to its environment. First I configured a pom.xml file for A-war module: <build> <pluginManagement> <plugins> <plugin> <artifactId>maven-war-plugin</artifactId> <executions> <execution> <id>package

Maven ear plugin multiple artifacts content

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PySpark 2.x: Programmatically adding Maven JAR Coordinates to Spark

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问题 The following is my PySpark startup snippet, which is pretty reliable (I've been using it a long time). Today I added the two Maven Coordinates shown in the spark.jars.packages option (effectively "plugging" in Kafka support). Now that normally triggers dependency downloads (performed by Spark automatically): import sys, os, multiprocessing from pyspark.sql import DataFrame, DataFrameStatFunctions, DataFrameNaFunctions from pyspark.conf import SparkConf from pyspark.sql import SparkSession

How to create Maven Parent POM speciific to organization?

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问题 Can any one explain how to create Parent POM, specific to organization . Here I am not looking for multimodule project. The POM what I am going to create will be used by all the projects and each project will have their own parent pom which extends the organization specific POM. Please provide some steps how to create in Eclipse. 回答1: Parent POM is called a BOM in Maven, you can put it anywhere so long as you define modules inside it, which will have their own poms. Example <project xmlns=

Using cached artifacts in Maven to avoid redundant builds?

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问题 I have a Maven 3 multi-module project (~50 modules) which is stored in Git. Multiple developers are working on this code and building it, and we also have automated build machines that run cold builds on every push. Most individual changelogs alter code in a fairly small number of modules, so it's a waste of time to rebuild the entire source tree with every change. However, I still want the final result of running the parent project build to be the same as if it had built the entire codebase.

How to set both VM Params and Program args using exec-maven-plugin?

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问题 I am using exec-maven-plugin to run java app. I need to pass both JVM params and program arguments. I am setting JVM params like this: <artifactId>exec-maven-plugin</artifactId> <version>1.6.0</version> <executions> <execution> <id>MyId</id> <goals> <goal>java</goal> </goals> <configuration> <mainClass>MyClass</mainClass> <arguments> <argument>-XX:+UseG1GC</argument> <argument>-Xms2G</argument> <argument>-Xmx2G</argument> </arguments> </configuration> </execution> ... and run the program: mvn

How to set both VM Params and Program args using exec-maven-plugin?

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My java application does not read my files (maven project)

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问题 I have an application in a Java simple project. However, I need to paste this project to a Maven project. So, I basically made a simple Maven project, and I copied and pasted all my classes into it. I need a war to run in a server, and I need to run a Main like a Java application, because this application configures the war application. However, when I run Main, I get some errors that I wasn't having before: java.io.FileNotFoundException: resources\config.properties (The system cannot find

cannot access net.sf.ehcache.CacheManager, class file for net.sf.ehcache.CacheManager not found

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问题 I have been implementing some caching in my project using EhCache . I have added following dependencies to my pom.xml  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.8.RELEASE</version> </dependency>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring