从头认识SpringBatch批处理框架---JobRepository数据库存储元数据并。。。 JobRepository存储执⾏期的元数据，提供两种默认实现,⼀种是存放在内存中，默认实现类为:MapJobRepositoryFactoryBean。在xml中的配置如下:
<bean id="jobRepository"class="org.epository.support.MapJobRepositoryFactoryBean"></bean>
另⼀种是存⼊数据库中，可以随时监控批处理Job的执⾏状态，查看Job执⾏结果是成功还是失败，并且使得在Job失败的情况下重新启动Job成为可能。具体配置如下:
<?xml version="1.0" encoding="UTF-8"?><bean:beans xmlns="/schema/batch"xmlns:bean="www./schema/beans"xmlns:xsi="/2001/XMLSchema-instance"xmlns:p="/schema/p"xmln s:tx="/schema/tx"xmlns:aop="/schema/aop"xmlns:context="www./schema/context"xsi:schemaLocation="/schema/beans /schema/bean s/spring-beans-3.0.xsd www.springframework.o
rg/schema/tx /schema/tx/spring-tx-3.0.xsd www./schema/aop /schema/aop/spring-aop-3.0.xsd /schema/context /schema/context/spring-context-2.5.xsd /schema/batch www.springframework. org/schema/batch/spring-batch-2.2.xsd"><!-- 作业仓库 --><job-repository id="jobRepository"data-source="dataSource"transaction-manager="trans actionManager"isolation-level-for-create="SERIALIZABLE"table-prefix="BATCH_"max-varchar-length="1000" /><!-- 作业调度器 --><bean:bean id=" jobLauncher"class="org.launch.support.SimpleJobLauncher"><bean:property name="jobRepository"ref="jobRepository"/ ></bean:bean><!-- 事务管理器 --><bean:bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager "><bean:property name="dataSource"ref="dataSource" /></bean:bean><!-- 数据源 --><bean:bean id="dataSource"class="org.springframework.jd bc.datasource.DriverManagerDataSource"><bean:property name="driverClassName"><bean:value&sql.jdbc.Driver</bean:value></bea n:property><bean:property name="url"><bean:value>jdbc:mysql://localhost:3306/mydatabase</bean: value></bean:property><bean:property name="username"value="root"></bean:property><bean:property name="password"value="wbw123456"></bean:property></bean:bean></bean:be ans>冷气机组
注意：在使⽤数据库的仓库时，需要初始化数据库表，数据库表脚本位置放在org\springframework\batch\spring-batch-
core\3.0.6.RELEASE\spring-batch-core-3.0.6.RELEASE.jar⽬录下，并且针对不同的数据库提供了不同的数据库脚本
在这⾥我们选⽤schema-mysql.sql 具体的建表语句如下:
电动液控闸阀-- Autogenerated: do not edit this fileCREATE TABLE BATCH_JOB_INSTANCE( JOB_INSTANCE_ID BIGINT NOT NULL PRIMARY KEY , VERSION BI GINT , JOB_NAME VARCHAR(100) NOT NULL, JOB_KEY VARCHAR(32) NOT NULL, constraint JOB_INST_UN unique(JOB_NAME, JOB_KEY)) ENGI NE=InnoDB;CREATE TABLE BATCH_JOB_EXECUTION( JOB_EXECUTION_ID BIGINT NOT NULL PRIMARY KEY , VERSION BIGINT , JOB_INSTA NCE_ID BIGINT NOT NULL, CREATE_TIME DATETIME NOT NULL, START_TIME DATETIME DEFAULT NULL , END_TIME DATETIME DEFAULT NU LL , STATUS VARCHAR(10) , EXIT_CODE VARCHAR(2500) , EXIT_MESSAGE VARCHAR(2500) , LAST_UPDATED DATETIME, JOB_CONFIGURATIO N_LOCATION VARCHAR(2500) NULL, constraint JOB_INST_EXEC_FK foreign key(JOB_INSTANCE_ID) references BATCH_JOB_INSTANCE(JOB_IN STANCE_ID)) ENGINE=InnoDB;CREATE TABLE BATCH_JOB_EXECUTION_PARAMS( JOB_EXECUTION_ID BIGINT NOT NULL , TYPE_CD VARCH AR(6) NOT NULL , KEY_NAME VARCHAR(100) NOT NULL , STRING_VAL VARCHAR(250) , DATE_VAL DATETIME DEFAULT NULL , LONG_VAL BIG INT , DOUBLE_VAL DOUBLE PRECISION , IDENTIFYING CHAR(1) NOT NULL , constraint JOB_EXEC_PARAMS_FK foreign key(JOB_EXECUTION_I D) references BATCH_JOB_EXECUTIO
车载影院
N(JOB_EXECUTION_ID)) ENGINE=InnoDB;CREATE TABLE BATCH_STEP_EXECUTION( STEP_EXECUTION _ID BIGINT NOT NULL PRIMARY KEY , VERSION BIGINT NOT NULL, STEP_NAME VARCHAR(100) NOT NULL, JOB_EXECUTION_ID BIGINT NOT N ULL, START_TIME DATETIME NOT NULL , END_TIME DATETIME DEFAULT NULL , STATUS VARCHAR(10) , COMMIT_COUNT BIGINT , READ_CO UNT BIGINT , FILTER_COUNT BIGINT , WRITE_COUNT BIGINT , READ_SKIP_COUNT BIGINT , WRITE_SKIP_COUNT BIGINT , PROCESS_SKIP_C OUNT BIGINT , ROLLBACK_COUNT BIGINT , EXIT_CODE VARCHAR(2500) , EXIT_MESSAGE VARCHAR(2500) , LAST_UPDATED DATETIME, const raint JOB_EXEC_STEP_FK foreign key(JOB_EXECUTION_ID) references BATCH_JOB_EXECUTION(JOB_EXECUTION_ID)) ENGINE=InnoDB;CREAT E TABLE BATCH_STEP_EXECUTION_CONTEXT( STEP_EXECUTION_ID BIGINT NOT NULL PRIMARY KEY, SHORT_CONTEXT VARCHAR(2500) N OT NULL, SERIALIZED_CONTEXT TEXT , constraint STEP_EXEC_CTX_FK foreign key(STEP_EXECUTION_ID) references BATCH_STEP_EXECUTI ON(STEP_EXECUTION_ID)) ENGINE=InnoDB;CREATE TABLE BATCH_JOB_EXECUTION_CONTEXT( JOB_EXECUTION_ID BIGINT NOT NULL PRI MARY KEY, SHORT_CONTEXT VARCHAR(2500) NOT NULL, SERIALIZED_CONTEXT TEXT , constraint JOB_EXEC_CTX_FK foreign key(JOB_EXEC UTION_ID) references BATCH_JOB_EXECUTION(J
OB_EXECUTION_ID)) ENGINE=InnoDB;CREATE TABLE BATCH_STEP_EXECUTION_SEQ( ID BI GINT NOT NULL, UNIQUE_KEY CHAR(1) NOT NULL, constraint UNIQUE_KEY_UN unique(UNIQUE_KEY)) ENGINE=InnoDB;INSERT INTO BATCH_S TEP_EXECUTION_SEQ(ID, UNIQUE_KEY) select * from(select 0 as ID, '0' as UNIQUE_KEY) as tmp where not exists(select * from BATCH_STEP_EXE CUTION_SEQ);CREATE TABLE BATCH_JOB_EXECUTION_SEQ( ID BIGINT NOT NULL, UNIQUE_KEY CHAR(1) NOT NULL, constraint UNIQUE_KEY _UN unique(UNIQUE_KEY)) ENGINE=InnoDB;INSERT INTO BATCH_JOB_EXECUTION_SEQ(ID, UNIQUE_KEY) select * from(select 0 as ID, '0' as U NIQUE_KEY) as tmp where not exists(select * from BATCH_JOB_EXECUTION_SEQ);CREATE TABLE BATCH_JOB_SEQ( ID BIGINT NOT NULL, UNI QUE_KEY CHAR(1) NOT NULL, constraint UNIQUE_KEY_UN unique(UNIQUE_KEY)) ENGINE=InnoDB;INSERT INTO BATCH_JOB_SEQ(ID, UNIQUE _KEY) select * from(select 0 as ID, '0' as UNIQUE_KEY) as tmp where not exists(select * from BATCH_JOB_SEQ);
SpringBatch框架进⾏元数据的管理共有九张表:
下⾯分别对9张表的数据结构讲解哈:
BATCH_JOB_INSTANCE(作业实例表，存放JOB的实例信息)
JOB_INSTANCE_ID bigint 主键 ，作业实例编号，根据BATCH_JOB_SEQ⾃动⽣成
VERSION bigint 版本号
JOB_NAME varchar作业名称 即在配置⽂件定义的JobId字段内容
JOB_KEY varchar作业标识，根据作业参数序列化⽣成的标识，需要注意通过JOB_NAME+JOB_KEY能够唯⼀区分⼀个作业实例
注意:JOB_KEY------如果同⼀个Job，则JOB_KEY⼀定不能相同，籍作业参数不能相同，如果不是同⼀个Job,JOB_KEY可以相同，也就是作业参数可以相同
BATCH_JOB_EXECUTION_PARAMS(作业参数表,⽤于存放每个JOB执⾏的时候的参数信息，即对于的JOB实例)
字段名称字段类型字段说明
JOB_EXECUTION_ID bigint外键ID，作业执⾏器ID编号，⼀个作业实例可能⼜会多⾏参数记录
TYPE_CD varchar参数的类型，总共有四种 String、Date、Double、Long
KEY_NAME varchar参数的名字
STRING_VAL varchar参数如果是String，就存放String类型的参数值
DATE_VAL datetime参数如果是Date，就存放Date类型的参数值
LONG_VAL bigint参数如果是Long，就存放Long类型的参数值
DOUBLE_VAL double参数如果是Double，就存放Double类型的参数值
IDENTIFYING char ⽤于标识作业参数是否标识作业实例
------------------------------------------------------------------------------------------------------------------------------------------------------------------
BATCH_JOB_EXECUTION(作业执⾏器表，存放当前作业的执⾏信息，创建时间、执⾏时间、执⾏结束时间、执⾏状态、执⾏Job实例等信息) 字段名称字段类型字段说明
JOB_EXECUTION_ID bigint主键
VERSION bigint版本号
JOB_INSTANCE_ID bigint作业实例ID
CREATE_TIME datetime作业执⾏器创建时间
START_TIME datetime作业执⾏器开始执⾏时间
END_TIME datetime作业执⾏器结束时间
STATUS varchar作业执⾏器执⾏的状态:COMPLETED、FAILED、STARTING、UNKNOW等
EXIT_CODE varchar作业执⾏器退出代码 如：UNKNOW、EXECUTING、COMPLETED等
EXIT_MESSAGE varchar作业执⾏器退出信息，通常存放异常信息
LAST_UPDATED datetime本条记录上次更新时间
JOB_CONFIGURATION_LOCATION varchar作业配置⽂件的位置
运⽤BATCH_JOB_INSTANCE和BATCH_JOB_EXECUTION两张表联合查询Job信息
SELECT bi.JOB_NAME,bi.JOB_KEY,be.CREATE_TIME,be.START_TIME,be.END_TIME,be.`STATUS`FROM batch_job_instance biLEFT JOIN batch_jo b_execution be ON bi.JOB_INSTANCE_ID = be.JOB_INSTANCE_IDwhere bi.JOB_NAME='billJob'
BATCH_JOB_EXECUTION_CONTENXT(作业执⾏上下⽂表，存放上下⽂信息)
字段名称字段类型字段说明
JOB_EXECUTION_ID bigint外键ID，作业执⾏器编号
彩碳粉
SHORT_CONTEXT varchar作业执⾏器上下⽂字符串格式锚杆垫板
SERIALIZED_CONTEXT text序列化的作业执⾏上下⽂
BATCH_JOB_EXECUTION_SEQ表（⽤于BATCH_JOB_EXECUTION和BATCH_JOB_EXECUTION_CONTEXT提供主键⽣成）BATCH_JOB_SEQ表（⽤于BATCH_JOB_INSTNCE和BATCH_JOB_EXECUTION_PARAMS提供主键⽣成）
BATCH_STEP_EXECUTION(作业步执⾏器，存放每个Step执⾏器的信息：开始时间、执⾏完成时间、读/写次数等)字段名称字段类型字段说明 STEP_EXECUTION_ID bigint 主键
VERSION bigint版本
STEP_NAME varchar作业步的名称
JOB_EXECUTION_ID bigint作业执⾏器ID
START_TIME datetime作业步执⾏器执⾏开始时间
END_TIME datetime作业步执⾏器执⾏结束时间
STATUS varchar 作业步执⾏器执⾏状态
COMPLETED, STARTING, STARTED, STOPPING, STOPPED, FAILED, ABANDONED, UNKNOWN 存在于org.BatchStatus
COMMIT_COUNT bigint事务提交次数
READ_COUNT bigint读数据次数
FILTER_COUNT bigint过滤掉的数据次数
WRITE_COUNT bigint写数据次数
READ_SKIP_COUNT bigint读数据跳过的次数
WRITE_SKIP_COUNT bigint写数据跳过的次数
PROCESS_SKIP_COUNT bigint处理数据跳过的次数
ROLLBACK_COUNT bigint事务回滚的次数
EXIT_CODE varchar作业步执⾏器退出编码，状态码存在于org.ExitStauts
EXIT_MESSAGE varchar作业步执⾏器退出描述,⼀般是异常信息蜂窝纸芯
LAST_UPDATED datetime本条记录上次更新时间
BATCH_STEP_EXECUTION_CONTEXT(作业步执⾏器上下⽂，存放作业步执⾏的上下⽂信息)
字段名称字段类型字段说明
STEP_EXECUTION_ID bigint作业步执⾏器ID
SHORT_CONTEXT varchar作业步执⾏器上下⽂字符串格式
SERIALIZED_CONTEXT text序列化作业步执⾏器上下⽂
BATCH_STEP_EXECUTION_SEQ（⽤于BATCH_STEP_EXECUTION和BATCH_STEP_EXECUTION_CONTEXT提供主键）
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