SpringBoot集成flink
Spring Boot 整合 Flink 主要涉及到以下几个步骤:
- 添加 Flink 依赖到 Spring Boot 项目的
pom.xml
文件中。 - 配置 Flink 环境相关的属性。
- 创建 Flink 的 StreamExecutionEnvironment 和其他需要的组件,例如 StreamTableEnvironment。
- 在 Spring 容器中初始化 Flink 组件。
- 编写 Flink 作业并运行。
以下是一个简单的示例:
pom.xml
添加 Flink 依赖:
<dependencies>
<!-- 添加 Flink 支持 -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>1.11.0</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_2.11</artifactId>
<version>1.11.0</version>
</dependency>
</dependencies>
application.properties
配置 Flink 属性:
# Flink 相关配置
flink.job-manager-ip=localhost
flink.job-manager-port=8081
flink.parallelism=1
Flink 配置类:
import org.apache.flink.api.java.utils.ParameterTool;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class FlinkConfig {
@Bean
public StreamExecutionEnvironment env(ParameterTool parameterTool) {
final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.getConfig().setGlobalJobParameters(parameterTool);
env.setParallelism(parameterTool.getInt("flink.parallelism", 1));
return env;
}
}
Flink 作业类:
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class FlinkStreamingJob {
private final StreamExecutionEnvironment env;
@Autowired
public FlinkStreamingJob(StreamExecutionEnvironment env) {
this.env = env;
}
public void run() throws Exception {
DataStream<Tuple2<String, Integer>> dataStream = env
.fromElements(Tuple2.of("hello", 1), Tuple2.of("world", 2))
.map(new MapFunction<Tuple2<String, Integer>, Tuple2<String, Integer>>() {
@Override
public Tuple2<String, Integer> map
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