springbatch部分概念

springbatch的默认涉及的表

batch_job_instance
batch_job_execution
batch_job_execution_context

batch_step_execution
batch_step_execution_context

batch_job_seq
batch_job_execution_seq
batch_job_execution_params
batch_step_execution_req

FLOW 为step集合，可以为多个JOB使用。

split实现并发执行step或flow

决策器的使用(Decider)

Job的嵌套

任务监听
StepExecutionListenter

Job传参
Job执行的实际是step，传参实际是传给step,通过 监听的before来实现传参
stepExecution.getJobParameters().getParameters();

Step实现方式有2个，Tasklet和chunk
chunk方式有itemReader和itemwriter和process

Step有2个返回状态：RepeatStatus.FINISHED;，RepeatStatus.CONTINUABLE;

执行状态设置了CONTINUABLE，表示连续不断的执行该step，没有终止状态。

对应部分学习代码：https://gitee.com/lenglingx/springbootbatch001

因此可以认为：

Tasklet 适用于该 Step 操作不需要读操作，或不需要写操作，或两者都不需要。

而Chunk则适用于典型的Read、Process、Write 操作。

杂pom.xml

https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies/Hoxton.SR12

https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies/2021.0.1

<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-dependencies</artifactId>
    <version>Hoxton.SR12</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-dependencies</artifactId>
    <version>2021.0.1</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

https://docs.spring.io/spring-cloud-netflix/docs/3.1.1/reference/html/#eurekaclient-without-jersey
<dependency>
    <groupId>com.sun.jersey</groupId>
    <artifactId>jersey-client</artifactId>
</dependency>
<dependency>
    <groupId>com.sun.jersey</groupId>
    <artifactId>jersey-core</artifactId>
</dependency>
<dependency>
    <groupId>com.sun.jersey.contribs</groupId>
    <artifactId>jersey-apache-client4</artifactId>
</dependency>

   <!-- eureka注册中心客户端支持 -->
   <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
   </dependency>
   <!-- eureka注册中心服务端支持 -->
   <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
   </dependency>
   <!-- springCloud 2020以上版本配合eureka需要 -->
   <dependency>
       <groupId>com.sun.jersey</groupId>
       <artifactId>jersey-client</artifactId>
       <version>1.19.4</version>
   </dependency>
   <dependency>
       <groupId>com.sun.jersey</groupId>
       <artifactId>jersey-core</artifactId>
       <version>1.19.4</version>
   </dependency>
   <dependency>
       <groupId>com.sun.jersey.contribs</groupId>
       <artifactId>jersey-apache-client4</artifactId>
       <version>1.19.4</version>
   </dependency>


https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-commons/3.1.1

2.3.12.RELEASE

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.5.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.12.RELEASE</version>
    <type>pom</type>
</dependency>



<!-- 统一管理jar包版本 -->
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>11</maven.compiler.source>
    <maven.compiler.target>11</maven.compiler.target>
    <junit.version>4.12</junit.version>
    <lombok.version>1.18.10</lombok.version>
    <log4j.version>1.2.17</log4j.version>
    <mysql.version>8.0.21</mysql.version>
    <druid.version>1.1.16</druid.version>
    <mybatis.spring.boot.version>2.1.3</mybatis.spring.boot.version>
</properties>
<!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
<dependencyManagement>
    <dependencies>
        <!--spring boot 2.3.3-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>2.3.3.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <!--spring cloud Hoxton.SR8-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR8</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <!--spring cloud alibaba 2.1.0.RELEASE-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.1.0.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis.spring.boot.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <optional>true</optional>
        </dependency>
    </dependencies>
</dependencyManagement>


	<build>
		<finalName>appname</finalName>
		<resources>
			<!-- 先指定 src/main/resources下所有文件及文件夹为资源文件0 -->
			<resource>
				<directory>src/main/resources</directory>
				<includes>
					<include>**/*</include>
				</includes>
			</resource>
			<!-- 过滤指定文件,如spring-mybatis.xml，文件中的${key}会被替换掉为真正的值 -->
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
				<includes>
					<include>application*.properties</include>
				</includes>
			</resource>
		</resources>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<fork>true</fork>
					<!--fork : 如果没有该项配置，肯呢个devtools不会起作用，即应用不会restart -->
					<addResources>true</addResources>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-surefire-plugin</artifactId>
				<configuration>
					<skip>true</skip>
				</configuration>
			</plugin>
		</plugins>
	</build>
	

<!-- https://mvnrepository.com/artifact/io.minio/minio -->
<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>8.3.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.minio/minio-admin -->
<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio-admin</artifactId>
    <version>8.3.6</version>
</dependency>