【Quartz】将定时任务持久化到数据库

　　之前的文章所做的demo是将定时任务的信息保存在内存中的，见以下配置

org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

　　如果，我们需要在系统意外（或非意外）重新启动后，仍保留定时任务信息，可以使用数据库存储定时任务信息。

org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX

　　存储在MySQL中：

　　由于需要连接MySQL数据库，需要加上数据库的JDBC驱动，这里以pom形式下载，也可以直接引入包

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.35</version>
</dependency>

　　然后需要在数据库中建一些Quartz的表，MySQL的建、删表脚本如下。如果你使用的是其他数据库，可以下载Quartz的distribution，在\docs\dbTables下。

 #
 # Quartz seems to work best with the driver mm.mysql-2.0.7-bin.jar
 #
 # PLEASE consider using mysql with innodb tables to avoid locking issues
 #
 # In your Quartz properties file, you'll need to set
 # org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.StdJDBCDelegate
 #
 
 DROP TABLE IF EXISTS QRTZ_FIRED_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_PAUSED_TRIGGER_GRPS;
 DROP TABLE IF EXISTS QRTZ_SCHEDULER_STATE;
 DROP TABLE IF EXISTS QRTZ_LOCKS;
 DROP TABLE IF EXISTS QRTZ_SIMPLE_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_SIMPROP_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_CRON_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_BLOB_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_TRIGGERS;
 DROP TABLE IF EXISTS QRTZ_JOB_DETAILS;
 DROP TABLE IF EXISTS QRTZ_CALENDARS;
 
 CREATE TABLE QRTZ_JOB_DETAILS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     JOB_NAME  VARCHAR(200) NOT NULL,
     JOB_GROUP VARCHAR(200) NOT NULL,
     DESCRIPTION VARCHAR(250) NULL,
     JOB_CLASS_NAME   VARCHAR(250) NOT NULL,
     IS_DURABLE VARCHAR(1) NOT NULL,
     IS_NONCONCURRENT VARCHAR(1) NOT NULL,
     IS_UPDATE_DATA VARCHAR(1) NOT NULL,
     REQUESTS_RECOVERY VARCHAR(1) NOT NULL,
     JOB_DATA BLOB NULL,
     PRIMARY KEY (SCHED_NAME,JOB_NAME,JOB_GROUP)
 );
 
 CREATE TABLE QRTZ_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     JOB_NAME  VARCHAR(200) NOT NULL,
     JOB_GROUP VARCHAR(200) NOT NULL,
     DESCRIPTION VARCHAR(250) NULL,
     NEXT_FIRE_TIME BIGINT(13) NULL,
     PREV_FIRE_TIME BIGINT(13) NULL,
     PRIORITY INTEGER NULL,
     TRIGGER_STATE VARCHAR(16) NOT NULL,
     TRIGGER_TYPE VARCHAR(8) NOT NULL,
     START_TIME BIGINT(13) NOT NULL,
     END_TIME BIGINT(13) NULL,
     CALENDAR_NAME VARCHAR(200) NULL,
     MISFIRE_INSTR SMALLINT(2) NULL,
     JOB_DATA BLOB NULL,
     PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
     FOREIGN KEY (SCHED_NAME,JOB_NAME,JOB_GROUP)
         REFERENCES QRTZ_JOB_DETAILS(SCHED_NAME,JOB_NAME,JOB_GROUP)
 );
 
 CREATE TABLE QRTZ_SIMPLE_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     REPEAT_COUNT BIGINT(7) NOT NULL,
     REPEAT_INTERVAL BIGINT(12) NOT NULL,
     TIMES_TRIGGERED BIGINT(10) NOT NULL,
     PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
     FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
         REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
 );
 
 CREATE TABLE QRTZ_CRON_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     CRON_EXPRESSION VARCHAR(200) NOT NULL,
     TIME_ZONE_ID VARCHAR(80),
     PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
     FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
         REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
 );
 
 CREATE TABLE QRTZ_SIMPROP_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     STR_PROP_1 VARCHAR(512) NULL,
     STR_PROP_2 VARCHAR(512) NULL,
     STR_PROP_3 VARCHAR(512) NULL,
     INT_PROP_1 INT NULL,
     INT_PROP_2 INT NULL,
     LONG_PROP_1 BIGINT NULL,
     LONG_PROP_2 BIGINT NULL,
     DEC_PROP_1 NUMERIC(13,4) NULL,
     DEC_PROP_2 NUMERIC(13,4) NULL,
     BOOL_PROP_1 VARCHAR(1) NULL,
     BOOL_PROP_2 VARCHAR(1) NULL,
     PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
     FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
     REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
 );
 
 CREATE TABLE QRTZ_BLOB_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     BLOB_DATA BLOB NULL,
     PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
     FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
         REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
 );
 
 CREATE TABLE QRTZ_CALENDARS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     CALENDAR_NAME  VARCHAR(200) NOT NULL,
     CALENDAR BLOB NOT NULL,
     PRIMARY KEY (SCHED_NAME,CALENDAR_NAME)
 );
 
 CREATE TABLE QRTZ_PAUSED_TRIGGER_GRPS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     TRIGGER_GROUP  VARCHAR(200) NOT NULL,
     PRIMARY KEY (SCHED_NAME,TRIGGER_GROUP)
 );
 
 CREATE TABLE QRTZ_FIRED_TRIGGERS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     ENTRY_ID VARCHAR(95) NOT NULL,
     TRIGGER_NAME VARCHAR(200) NOT NULL,
     TRIGGER_GROUP VARCHAR(200) NOT NULL,
     INSTANCE_NAME VARCHAR(200) NOT NULL,
     FIRED_TIME BIGINT(13) NOT NULL,
     SCHED_TIME BIGINT(13) NOT NULL,
     PRIORITY INTEGER NOT NULL,
     STATE VARCHAR(16) NOT NULL,
     JOB_NAME VARCHAR(200) NULL,
     JOB_GROUP VARCHAR(200) NULL,
     IS_NONCONCURRENT VARCHAR(1) NULL,
     REQUESTS_RECOVERY VARCHAR(1) NULL,
     PRIMARY KEY (SCHED_NAME,ENTRY_ID)
 );
 
 CREATE TABLE QRTZ_SCHEDULER_STATE
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     INSTANCE_NAME VARCHAR(200) NOT NULL,
     LAST_CHECKIN_TIME BIGINT(13) NOT NULL,
     CHECKIN_INTERVAL BIGINT(13) NOT NULL,
     PRIMARY KEY (SCHED_NAME,INSTANCE_NAME)
 );
 
 CREATE TABLE QRTZ_LOCKS
   (
     SCHED_NAME VARCHAR(120) NOT NULL,
     LOCK_NAME  VARCHAR(40) NOT NULL,
     PRIMARY KEY (SCHED_NAME,LOCK_NAME)
 );
 
 commit;

　　这个脚本除了给出建、删表语句，也给出了org.quartz.jobStore.driverDelegateClass配置，此项配置到quartz.properties中

　　注：你可能也注意到了，这些表都是以QRTZ_为前缀的，这是默认的前缀。如果你需要用到其他前缀（个性化需求，或需要配置多个quartz实例），可以在以下项配置（在quartz.properties中）

org.quartz.jobStore.tablePrefix = QRTZ_

　　最主要的修改是quartz.properties

 org.quartz.scheduler.instanceName = MyScheduler
 org.quartz.threadPool.threadCount = 3
 org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX
 org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.StdJDBCDelegate
 org.quartz.jobStore.tablePrefix = QRTZ_
 org.quartz.jobStore.dataSource = myDS
 
 org.quartz.dataSource.myDS.driver = com.mysql.jdbc.Driver
 org.quartz.dataSource.myDS.URL = jdbc:mysql://localhost:3306/ll?characterEncoding=utf-8
 org.quartz.dataSource.myDS.user = root
 org.quartz.dataSource.myDS.password = 123456
 org.quartz.dataSource.myDS.maxConnections = 5

　　OK了，然后我们可以启动Bootstrap类，注册、运行定时任务。你可以发现MySQL的表中已经有此定时任务的记录了。

　　然后你可以停止Bootstrap类，将Bootstrap类中关于注册、启动定时任务的代码删除或注释，然后启动Bootstrap类，看上一次操作注册的定时任务会不会继续运行。