4.0.0flink-projectflink-project0.1jarFlink Quickstart JobUTF-81.15.01.82.12${target.java.version}${target.java.version}2.17.1apache.snapshotsApache Development Snapshot Repositoryhttps://repository.apache.org/content/repositories/snapshots/falsetrueorg.apache.flinkflink-streaming-java${flink.version}providedorg.apache.flinkflink-clients${flink.version}providedorg.apache.logging.log4jlog4j-slf4j-impl${log4j.version}runtimeorg.apache.logging.log4jlog4j-api${log4j.version}runtimeorg.apache.logging.log4jlog4j-core${log4j.version}runtimeorg.apache.maven.pluginsmaven-compiler-plugin3.1${target.java.version}${target.java.version}org.apache.maven.pluginsmaven-shade-plugin3.1.1packageshadeorg.apache.flink:flink-shaded-force-shadingcom.google.code.findbugs:jsr305org.slf4j:*org.apache.logging.log4j:**:*META-INF/*.SFMETA-INF/*.DSAMETA-INF/*.RSAmyflink.DataStreamJoborg.eclipse.m2elifecycle-mapping1.0.0org.apache.maven.pluginsmaven-shade-plugin[3.1.1,)shadeorg.apache.maven.pluginsmaven-compiler-plugin[3.1,)testCompilecompile
静态计算
添加 一个简单的单词计数程序 WordCount.class
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.util.Collector;
/**
* @author ximu
* @date 2022/7/24
* @description
*/
public class WordCount {
//
// Program
//
public static void main(String[] args) throws Exception {
// set up the execution environment
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
// get input data
DataSet text = env.fromElements(
"To be, or not to be,--that is the question:--",
"Whether 'tis nobler in the mind to suffer",
"The slings and arrows of outrageous fortune",
"Or to take arms against a sea of troubles,"
);
DataSet> counts =
// split up the lines in pairs (2-tuples) containing: (word,1)
text.flatMap(new LineSplitter())
// group by the tuple field "0" and sum up tuple field "1"
.groupBy(0) //(i,1) (am,1) (chinese,1)
.sum(1);
// execute and print result
counts.print();
}
//
// User Functions
//
/**
* Implements the string tokenizer that splits sentences into words as a user-defined
* FlatMapFunction. The function takes a line (String) and splits it into
* multiple pairs in the form of "(word,1)" (Tuple2<String, Integer>).
*/
public static final class LineSplitter implements FlatMapFunction> {
@Override
public void flatMap(String value, Collector> out) {
// normalize and split the line
String[] tokens = value.toLowerCase().split("\\W+");
// emit the pairs
for (String token : tokens) {
if (token.length() > 0) {
out.collect(new Tuple2(token, 1));
}
}
}
}
}
Open Source Obfuscators
ProGuard
http://java-source.net/open-source/obfuscators/proguardProGuard is a free Java class file shrinker and obfuscator. It can detect and remove unused classes, fields, m
Maven简介
是什么？
Is a software project management and comprehension tool.项目管理工具
是基于POM概念(工程对象模型)
[设计重复、编码重复、文档重复、构建重复，maven最大化消除了构建的重复]
[与XP：简单、交流与反馈；测试驱动开发、十分钟构建、持续集成、富有信息的工作区]
功能：
wget http://download.redis.io/redis-stable.tar.gz
tar xvzf redis-stable.tar.gz
cd redis-stable
make
前面3步应该没有问题，主要的问题是执行make的时候，出现了异常。
异常一：
make[2]: cc: Command not found
异常原因：没有安装g
nimbus结点配置（storm.yaml）信息：
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional inf
