SpringBoot Flink

肥仔哥哥1930 2022-06-02 我要评论

一、SpringBoot集成Flink

其实没什么特别的，就把Flink依赖的包在pom引入就行了。只是FlinkTask的写法要小调整下，把相关依赖交给spring管理就行。

然后如果放弃Flink的Dashboard端监控task执行相关信息，那也可以在SpringBoot的启动类里调用就行，但是可能出现task的相关对象没有注入，这种都是小问题（实际就是springboot启动完成再调用，或者通过自动任务调用。也可以在springBoot的入口类用@ComponentScan注解扫描flinkTask所在的目录）。

实际更潇洒一点的做法可以将flinkTask的信息存表，通过springBoot的接口调用restfullApi接口，接口里调用task，甚至可以做task的启停、线程监控（接口里开线程调用task）。

二、FlinkTask写法调整

@Component
@Slf4j
public class JianGongStopCarTask {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        DataStream<JGParkingLotInfo> dataStream = env.addSource(new JGParkingLotInfoSource());
//       获取到数据之后转换格式  此处不做转换
        SingleOutputStreamOperator<JGParkingLotInfo> jgParkingLotInfoSingleOutputStreamOperator = dataStream.map(jgParkingLotInfo -> jgParkingLotInfo);
        jgParkingLotInfoSingleOutputStreamOperator.addSink(new SinkToMySQL());
        env.execute();
    }
}

PS：

实际就是@Component这个注解，然后这个示例里的JGParkingLotInfoSource、SinkToMySQL类都需要加这个注解。其他就没有什么调整了，然后如果还有其他依赖没有，使用hutool的SpringUtil进行get对象就行。

三、打包插件

<plugins>
      <!-- 编译插件 -->
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      <!--  spring boot 项目打包
       <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
       </plugin>-->
      <!-- Flink打包方式一 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>3.3.0</version>
        <configuration>
          <archive>
            <manifest>
              <mainClass>com.easylinkin.dc.olap.JianGongStopCarTask</mainClass>
            </manifest>
          </archive>
          <!-- 打包依赖 -->
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <!-- flink打包方式二
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>3.3.0</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <createDependencyReducedPom>false</createDependencyReducedPom>
              <artifactSet>
                <excludes>
                  <exclude>com.google.code.findbugs:jsr305</exclude>
                  <exclude>org.slf4j:*</exclude>
                  <exclude>log4j:*</exclude>
                </excludes>
              </artifactSet>
              <filters>
                <filter>
                  <artifact>*:*</artifact>
                  <excludes>
                    <exclude>module-info.class</exclude>
                    <exclude>META-INF/*.SF</exclude>
                    <exclude>META-INF/*.DSA</exclude>
                    <exclude>META-INF/*.RSA</exclude>
                  </excludes>
                </filter>
              </filters>
              <transformers>
                <transformer
                  implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                  <resource>META-INF/spring.handlers</resource>
                  <resource>reference.conf</resource>
                </transformer>
                <transformer
                  implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
                  <resource>META-INF/spring.factories</resource>
                </transformer>
                <transformer
                  implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                  <resource>META-INF/spring.schemas</resource>
                </transformer>
                <transformer
                  implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                <transformer
                  implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <mainClass>com.easylinkin.dc.olap.JianGongStopCarTask</mainClass>
                </transformer>
              </transformers>
            </configuration>
          </execution>
        </executions>
      </plugin>
      -->
      <!-- flink打包方式三
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
              <mainClass>com.easylinkin.dc.olap.JianGongStopCarTask</mainClass>
              <useUniqueVersions>false</useUniqueVersions>
              <addClasspath>true</addClasspath>
              <classpathPrefix>./lib/</classpathPrefix>
            </manifest>
          </archive>
          <excludes>
            <exclude>module-info.class</exclude>
            <exclude>META-INF/*.SF</exclude>
            <exclude>META-INF/*.DSA</exclude>
            <exclude>META-INF/*.RSA</exclude>
            <exclude>com.google.code.findbugs:jsr305</exclude>
            <exclude>org.slf4j:*</exclude>
            <exclude>log4j:*</exclude>
          </excludes>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>3.3.0</version>
        <executions>
          <execution>
            <id>copy-dependencies</id>
            <phase>package</phase>
            <goals>
              <goal>copy-dependencies</goal>
            </goals>
            <configuration>
              <outputDirectory>${project.build.directory}/lib</outputDirectory>
              <excludeTransitive>false</excludeTransitive>
              <stripVersion>false</stripVersion>
            </configuration>
          </execution>
        </executions>
      </plugin>-->
    </plugins>

除了打成SpringBoot用springboot的插件打包，flinkTask的打包有3种方式，方式三适合lib包提前传到task指定的依赖存储目录。这样上传flinkTask就很小。

方式二是官方推荐FlinkTask的打包方式，地址：https://nightlies.apache.org/flink/flink-docs-release-1.15/docs/dev/configuration/maven/

说一千道一万就是因为打包的META-INF下的MANIFEST.MF文件的内容有区别。springBoot项目的这个文件有自己的JarLauncher。