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作者︰JokerPig  來(lai)源︰IT165收(shou)集  發布(bu)日期︰2020-02-25 23:12:31

(一(yi))Quartz單機

1.Quartz簡介(jie)

  Quartz是qie)桓 耆 you)java編寫(xie)的(de)mu) 醋饕檔(dang)鞫瓤kuang)架,能實現業務的(de)定(ding)時調度。Quartz主(zhu)要有三(san)個核(he)心調度器、任(ren)務和觸發器︰

?任(ren)務-JobDetail︰Quartz在任(ren)務調度的(de)時候,需要創建一(yi)個任(ren)務實dao)obDetail正是承擔這個角qiao) Tuartz2.0以(yi)前(qian)的(de)版本中,創建一(yi)個任(ren)務通過new JobDetail(String jobName, String gruop, Class jobCLass)這個方(fang)法來(lai)創建,在2.0之後的(de)版本中通過JobBuilder來(lai)創建任(ren)務。Job接口中只有一(yi)個方(fang)法void execute(JobExecutionContext context) throws JobExecutionException,因此在任(ren)務調度時bao) 恍枰 迪xecute方(fang)法就可以(yi)了,使用起來(lai)很方(fang)便。

?觸發器-Trigger︰定(ding)義Job的(de)執行時間、次(ci)數等信(xin)息,有SimpleTrigger和CronTrigger兩種(zhong)類型。當你需要的(de)是qie)淮ci)性的(de)調度,或者你需要在指(zhi)定(ding)的(de)時間激活某個任(ren)務並執行N次(ci),設置每次(ci)任(ren)務執行的(de)間隔時間T。那(na)此時使用SimpleTrigger將是非(fei)常方(fang)便的(de)。如果你想在每周(zhou)的(de)周(zhou)一(yi)7:00或者每月的(de)第2,3天實現任(ren)務調度,這時候就需要用到CronTrigger,CronTrigger能夠提供復雜的(de)觸發器表達式滿足我們的(de)需求。同時需要提到的(de)一(yi)點是Quartz還提供很多(duo)日期的(de)實現類DateBuilder等,在實dao)適褂彌瀉芊fang)便。

?調度器-Scheduler︰Quartz框(kuang)架的(de)核(he)心是調度器。調度器負責管理Quartz應用運行時環境。調度器不是靠(kao)自(zi)己做所有的(de)工作,而(er)是qie)覽悼kuang)架內一(yi)些非(fei)常重要的(de)部件。Quartz不僅僅是線(xian)程(cheng)和線(xian)程(cheng)管理。為確保(bao)可伸縮性,Quartz采用了基于多(duo)線(xian)程(cheng)的(de)架構。啟動時bao) kuang)架初(chu)始化一(yi)套worker線(xian)程(cheng),這套線(xian)程(cheng)被調度器用來(lai)執行預定(ding)的(de)作業。這就是Quartz怎(zen)樣能並發運行多(duo)個作業dang)腦 懟uartz依賴一(yi)套松耦(ou)合的(de)線(xian)程(cheng)池管理部件來(lai)管理線(xian)程(cheng)環境。

2.搭建Quartz工程(cheng)

?創建一(yi)個新(xin)工程(cheng)

  新(xin)建文(wen)件lib作為外(wai)部jar包(bao),Quartz最新(xin)版本通過官網可以(yi)下載http://www.quartz-scheduler.org/downloads/。導(dao)入你下載的(de)quartz包(bao),新(xin)建package為com.example.singleQuartz,里面就兩個簡單的(de)類SingleQuartzJob和SingleQuartzServer。SingleQuartzJob定(ding)義Job的(de)實現類,SingleQuartzServer任(ren)務調度服(fu)務。

?SingleQuartzJob.java定(ding)義Job的(de)實現類

package com.example.singleQuartz;import org.quartz.Job;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;import java.util.Date;/** * Created by XuHui on 2016/12/22. */public class SingleQuartzJob implements Job { @Override public void execute(JobExecutionContext context) throws JobExecutionException { System.out.print('Hello, Quartz! - executing its JOB at '+  new Date() + ' by ' + context.getTrigger().getJobKey() + ''); }}

?SingleQuartzServer.java實現任(ren)務調度

package com.example.singleQuartz;import org.quartz.*;import org.quartz.impl.StdSchedulerFactory;import java.util.Date;import java.util.concurrent.TimeUnit;/** * Created by XuHui on 2016/12/22. */public class SingleQuartzServer { public static void main(String[] args) throws SchedulerException { /* 獲取Scheduler實dao)*/ SchedulerFactory factory = new StdSchedulerFactory(); Scheduler scheduler = factory.getScheduler(); /* 啟動調度器 */ scheduler.start(); /* 任(ren)務︰withIdentity(String name, String group),其中groupName可以(yi)自(zi)己定(ding)義,也可以(yi)用Scheduler提供的(de)DEFAULT_GROUP。  這里要求同組里面的(de)jobName不能相同*/ JobDetail jobDetail = JobBuilder.newJob(SingleQuartzJob.class)  .withIdentity('job', Scheduler.DEFAULT_GROUP)  .build(); /*觸發器︰SimpleTrigger和CronTrigger。實現的(de)功能是︰接下來(lai)30s後執行job,以(yi)後每個10s執行一(yi)次(ci),重復10次(ci),一(yi)共執行11次(ci)。   nextGivenSecondDate(null, 30)距離現在時間30s之後執行job,此處(chu)null可寫(xie)作new Date(),可自(zi)行在api查看源碼實現 */ Date startTime = DateBuilder.nextGivenSecondDate(null, 30); SimpleTrigger simpleTrigger = TriggerBuilder.newTrigger()  .withIdentity('trigger', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(10))  .forJob(jobDetail)  .build(); /* 交(jiao)由(you)調度器調度Job */ scheduler.scheduleJob(jobDetail, simpleTrigger); /* 3分zhong)尤ren)務調度之後關閉調度器 */ try{  TimeUnit.MINUTES.sleep(3); } catch (Exception e) {  e.printStackTrace(); } finally {  scheduler.shutdown(); } }}

?執行任(ren)務調度

  執行run->main但是發現報(bao)錯(cuo)了。此時是qiao)倭肆礁齦鋈罩zhi)包(bao),slf4j-api-1.7.22.jar和slf4j-simple-1.7.22.jar,我們只要添加slf4j包(bao)就可以(yi)了。

通過官網可以(yi)下載http://www.slf4j.org/download.html,找到這兩個包(bao)放(fang)到lib下就可以(yi)了。

Exception in thread 'main' java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory at org.quartz.impl.StdSchedulerFactory.<init>(StdSchedulerFactory.java:303) at com.example.singleQuartz.SingleQuartzServer.main(SingleQuartzServer.java:15) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 7 more

解決完上面日志(zhi)包(bao)的(de)問題(ti),我們運行上面程(cheng)序可以(yi)看到正常的(de)調度結果如下。

[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.Hello, Quartz! - executing its JOB at Thu Dec 22 19:40:30 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:40:40 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:40:50 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:00 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:10 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:20 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:30 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:40 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:41:50 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:42:00 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Thu Dec 22 19:42:10 CST 2016 by DEFAULT.job[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutting down.[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED paused.[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutdown complete.

 ?任(ren)務調度的(de)多(duo)線(xian)程(cheng)

  Scheduler是存在多(duo)對多(duo)的(de)關系,由(you)于線(xian)程(cheng)池的(de)存在,調度器實現多(duo)線(xian)程(cheng)並發執行任(ren)務調度,直接看下面demo就能明白(bai)。

package com.example.singleQuartz;import org.quartz.*;import org.quartz.impl.StdSchedulerFactory;import java.util.Date;import java.util.concurrent.TimeUnit;/** * Created by XuHui on 2016/12/22. */public class SingleQuartzThreadPoolServer { public static void main(String[] args) throws SchedulerException { /* 獲取Scheduler實dao)*/ SchedulerFactory factory = new StdSchedulerFactory(); Scheduler scheduler = factory.getScheduler(); /* 啟動調度器 */ scheduler.start(); /******************************************************* Job-1 ****************************************************************/ /* 任(ren)務︰withIdentity(String name, String group),其中groupName可以(yi)自(zi)己定(ding)義,也可以(yi)用Scheduler提供的(de)DEFAULT_GROUP。  這里要求同組里面的(de)jobName不能相同*/ JobDetail jobDetail = JobBuilder.newJob(SingleQuartzJob.class)  .withIdentity('job1', Scheduler.DEFAULT_GROUP)  .build(); /*觸發器︰SimpleTrigger和CronTrigger。實現的(de)功能是︰接下來(lai)30s後執行job,以(yi)後每個10s執行一(yi)次(ci),重復10次(ci),一(yi)共執行11次(ci)。   nextGivenSecondDate(null, 30)距離現在時間30s之後執行job,此處(chu)null可寫(xie)作new Date(),可自(zi)行在api查看源碼實現 */ Date startTime = DateBuilder.nextGivenSecondDate(null, 30); SimpleTrigger simpleTrigger = TriggerBuilder.newTrigger()  .withIdentity('trigger1', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(2))  .forJob(jobDetail)  .build(); /* 交(jiao)由(you)調度器調度Job */ scheduler.scheduleJob(jobDetail, simpleTrigger); /******************************************************* Job-2 ****************************************************************/ jobDetail = JobBuilder.newJob(SingleQuartzJob.class)  .withIdentity('job2', Scheduler.DEFAULT_GROUP)  .build(); simpleTrigger = TriggerBuilder.newTrigger()  .withIdentity('trigger2', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(2))  .forJob(jobDetail)  .build(); scheduler.scheduleJob(jobDetail, simpleTrigger); /******************************************************* Job-3 ****************************************************************/ jobDetail = JobBuilder.newJob(SingleQuartzJob.class)  .withIdentity('job3', Scheduler.DEFAULT_GROUP)  .build(); simpleTrigger = TriggerBuilder.newTrigger()  .withIdentity('trigger3', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(2))  .forJob(jobDetail)  .build(); scheduler.scheduleJob(jobDetail, simpleTrigger); /* 2分zhong)尤ren)務調度之後關閉調度器 */ try{  TimeUnit.MINUTES.sleep(2); } catch (Exception e) {  e.printStackTrace(); } finally {  scheduler.shutdown(); } }}

執行結果如下︰

[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:30 CST 2016 by DEFAULT.job1Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:30 CST 2016 by DEFAULT.job2Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:30 CST 2016 by DEFAULT.job3Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:40 CST 2016 by DEFAULT.job3Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:40 CST 2016 by DEFAULT.job1Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:40 CST 2016 by DEFAULT.job2Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:50 CST 2016 by DEFAULT.job1Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:50 CST 2016 by DEFAULT.job3Hello, Quartz! - executing its JOB at Thu Dec 22 19:52:50 CST 2016 by DEFAULT.job2[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutting down.[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED paused.[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutdown complete.

 (二)任(ren)務調度持zhi)玫絞菘/strong>

1.建立數據庫和建表

  上面的(de)例子的(de)任(ren)務是存在內存中的(de),如果程(cheng)序關閉任(ren)務就會(hui)消失,為了保(bao)持任(ren)務的(de)mu)沙志(zhi)眯裕 枰﹦ ren)務調度存到數據庫中。在你下載的(de)quartz包(bao)下找到quartz-2.2.1docsdbTables,找到你對應的(de)數據庫建表語言,這里我用的(de)是mysql數據庫tables_mysql.sql。在你本地或者服(fu)務器數據庫新(xin)建一(yi)個數據庫quartz(你可以(yi)不建,主(zhu)要為了和其他數據庫區(qu)分)。將以(yi)下的(de)建表語言導(dao)入該(gai)數據庫。

## 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;

2.導(dao)入mysql數據庫的(de)jdbc驅動包(bao),mysql-connector-java-5.1.40-bin.jar

3.配置Quartz配置文(wen)件quartz.properities

org.quartz.scheduler.instanceName = MySchedulerorg.quartz.threadPool.threadCount = 3org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTXorg.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.StdJDBCDelegateorg.quartz.jobStore.tablePrefix = QRTZ_org.quartz.jobStore.dataSource = myDSorg.quartz.dataSource.myDS.driver = com.mysql.jdbc.Driverorg.quartz.dataSource.myDS.URL = jdbc:mysql://localhost:3306/quartz?characterEncoding=utf-8org.quartz.dataSource.myDS.user = rootorg.quartz.dataSource.myDS.password = 123456org.quartz.dataSource.myDS.maxConnections = 5

4.任(ren)務調度的(de)持zhi)眯/strong>

  其實介(jie)紹這部分zhong)饕 俏 撕竺嫻de)Quartz集群(qun)做鋪墊。為了驗證任(ren)務調度的(de)mu)沙志(zhi)眯裕 頤譴誘飭椒fang)面驗證,當我們程(cheng)序停(ting)止運行的(de)時候,查看ci)菘餑懿榭吹餃ren)務調度的(de)數據;當重新(xin)啟動同一(yi)調度器的(de)時候,原來(lai)的(de)任(ren)務能繼續執行。SingleQuartzKeepAlive.java如下,其實和上面的(de)SingleQuartzServer基本一(yi)樣,只是加載了Quartz配置文(wen)件。

package com.example.singleQuartz;import org.quartz.*;import org.quartz.impl.StdSchedulerFactory;import java.util.Date;import java.util.concurrent.TimeUnit;/** * Created by XuHui on 2016/12/22. */public class SingleQuartzKeepAlive { public static void main(String[] args) throws SchedulerException {  /* 獲取Scheduler實dao)*/ StdSchedulerFactory factory = new StdSchedulerFactory(); factory.initialize('quartz.properities'); Scheduler scheduler = factory.getScheduler(); /* 啟動調度器 */ scheduler.start(); JobDetail jobDetail = JobBuilder.newJob(SingleQuartzJob.class)  .withIdentity('job', Scheduler.DEFAULT_GROUP)  .build(); Date startTime = DateBuilder.nextGivenSecondDate(null, 30); SimpleTrigger simpleTrigger = (SimpleTrigger) TriggerBuilder.newTrigger()  .withIdentity('trigger', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(10))  .forJob(jobDetail)  .build(); /* 交(jiao)由(you)調度器調度Job */ scheduler.scheduleJob(jobDetail, simpleTrigger); /* 3分zhong)尤ren)務調度之後關閉調度器 */ try{  TimeUnit.MINUTES.sleep(3); } catch (Exception e) {  e.printStackTrace(); } finally {  scheduler.shutdown(); } }}

我們run->main發現報(bao)錯(cuo)了,報(bao)錯(cuo)如下。這個因為我們缺少了c3p0-0.9.1.2.jar,下載地址為http://www.mchange.com/projects/c3p0/index.html。將這個包(bao)加入lib中即可。

Exception in thread 'main' java.lang.NoClassDefFoundError: com/mchange/v2/c3p0/ComboPooledDataSource at org.quartz.utils.PoolingConnectionProvider.initialize(PoolingConnectionProvider.java:210) at org.quartz.utils.PoolingConnectionProvider.<init>(PoolingConnectionProvider.java:155) at org.quartz.impl.StdSchedulerFactory.instantiate(StdSchedulerFactory.java:1014) at org.quartz.impl.StdSchedulerFactory.getScheduler(StdSchedulerFactory.java:1519) at com.example.singleQuartz.SingleQuartzKeepAlive.main(SingleQuartzKeepAlive.java:17) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 10 moreProcess finished with exit code 1

 運行結果正常,我們在數據庫可以(yi)看到job和trigger表都有了任(ren)務調度記錄數據。此時我們不妨只啟動原來(lai)的(de)調度器,看看ci)欠袢ren)務調度還能正常進行。通過結果同學們就很清楚(chu)了,這次(ci)任(ren)務調度ren)頤侵恢蔥辛次(ci),因為在程(cheng)序中斷之前(qian)運行了7次(ci)。

package com.example.singleQuartz;import org.quartz.Scheduler;import org.quartz.SchedulerException;import org.quartz.impl.StdSchedulerFactory;import java.util.concurrent.TimeUnit;/** * Created by XuHui on 2016/12/23. */public class SingleQuartzOldScheduler { public static void main(String[] args) throws SchedulerException { StdSchedulerFactory factory = new StdSchedulerFactory(); factory.initialize('quartz.properities'); Scheduler scheduler = factory.getScheduler(); scheduler.start(); try{  TimeUnit.MINUTES.sleep(1); } catch (Exception e) {  e.printStackTrace(); } finally {  scheduler.shutdown(); } }}=================結果====================[main] INFO org.quartz.core.QuartzScheduler - Scheduler MyScheduler_$_NON_CLUSTERED started.Hello, Quartz! - executing its JOB at Fri Dec 23 09:20:16 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Fri Dec 23 09:20:26 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Fri Dec 23 09:20:36 CST 2016 by DEFAULT.jobHello, Quartz! - executing its JOB at Fri Dec 23 09:20:46 CST 2016 by DEFAULT.job[main] INFO org.quartz.core.QuartzScheduler - Scheduler MyScheduler_$_NON_CLUSTERED shutting down.[main] INFO org.quartz.core.QuartzScheduler - Scheduler MyScheduler_$_NON_CLUSTERED paused.[main] INFO org.quartz.core.QuartzScheduler - Scheduler MyScheduler_$_NON_CLUSTERED shutdown complete.

5.最終的(de)工程(cheng)目(mu)錄結構

(三(san))Quartz集群(qun)

1.搭建web工程(cheng)

  看完第二部分zhong) 螅 蟛糠滯 ?丫 靼bai)了,Quartz集群(qun)是怎(zen)麼回事了。其實就是qian)訓鞫熱(re)ren)務存到數據庫中,集群(qun)的(de)時候每台服(fu)務器調度re)ren)務都指(zhi)向同一(yi)數據庫,從同一(yi)數據庫取調度re)ren)務,這就是Quartz集群(qun)了。為在本地驗證quartz集群(qun),我重新(xin)搭建一(yi)個工程(cheng),里面?伊礁eb模塊,目(mu)錄結構如下。clusterweb_two和clusterweb_one文(wen)件和配置一(yi)模一(yi)樣。

2.配置Quartz集群(qun)文(wen)件quartz.properities

  多(duo)台服(fu)務器上的(de)這個配置文(wen)件除了instanceId不同,這里可以(yi)設置成AUTO根據機器自(zi)動生成,其他基本都相同,必(bi)須限(xian)定(ding)的(de)是數據庫信(xin)息必(bi)須相同。

org.quartz.scheduler.instanceName = ClusterSchedulerorg.quartz.threadPool.threadCount = 3org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTXorg.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.StdJDBCDelegateorg.quartz.jobStore.tablePrefix = QRTZ_org.quartz.jobStore.dataSource = myDS# Clusterorg.quartz.jobStore.isClustered = trueorg.quartz.scheduler.instanceId = AUTOorg.quartz.dataSource.myDS.driver = com.mysql.jdbc.Driverorg.quartz.dataSource.myDS.URL = jdbc:mysql://localhost:3306/quartz?characterEncoding=utf-8org.quartz.dataSource.myDS.user = rootorg.quartz.dataSource.myDS.password = 123456org.quartz.dataSource.myDS.maxConnections = 5

3.配置web監听器

  我們qian)訓鞫繞鞣fang)到web監听器中運行,當web啟動時會(hui)運行這個監听器,同時會(hui)啟動調度器,監听器QuartzApplicationListener.java如下所示。

package com.example.web;import org.quartz.*;import org.quartz.impl.StdSchedulerFactory;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import java.util.Date;import java.util.concurrent.TimeUnit;/** * Created by XuHui on 2016/12/23. */public class QuartzApplicationListener implements ServletContextListener { private Scheduler scheduler = null; @Override public void contextInitialized(ServletContextEvent servletContextEvent) { StdSchedulerFactory factory = new StdSchedulerFactory(); try {  factory.initialize('quartz.properities');  scheduler = factory.getScheduler();  /* 啟動調度器 */  scheduler.start(); } catch (SchedulerException e) {  e.printStackTrace(); } JobDetail jobDetail = JobBuilder.newJob(HelloJob.class)  .withIdentity('job', Scheduler.DEFAULT_GROUP)  .build(); Date startTime = DateBuilder.nextGivenSecondDate(null, 30); SimpleTrigger simpleTrigger = TriggerBuilder.newTrigger()  .withIdentity('trigger', Scheduler.DEFAULT_GROUP)  .startAt(startTime)  .withSchedule(SimpleScheduleBuilder.simpleSchedule()   .withIntervalInSeconds(10)   .withRepeatCount(10))  .forJob(jobDetail)  .build(); try{  /* 交(jiao)由(you)調度器調度Job */  scheduler.scheduleJob(jobDetail, simpleTrigger); } catch (SchedulerException e) {  e.printStackTrace(); } /* 3分zhong)尤ren)務調度之後關閉調度器 */ try{  TimeUnit.MINUTES.sleep(3); }catch (Exception e) {  e.printStackTrace(); } } @Override public void contextDestroyed(ServletContextEvent servletContextEvent) { try{  scheduler.shutdown(); } catch (SchedulerException e) {  e.printStackTrace(); } }}

4.web配置文(wen)件web.xml

<?xml version='1.0' encoding='UTF-8'?><web-app xmlns='http://xmlns.jcp.org/xml/ns/javaee'  xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'  xsi:schemaLocation='http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd'  version='3.1'> <listener> <listener-class>  com.example.web.QuartzApplicationListener </listener-class> </listener></web-app>

5.運行兩個tomcat模擬集群(qun)

  在idea中xin)渲昧礁omcat,並且(qie)讓兩個tomcat同時運行有點小麻煩,主(zhu)要注(zhu)意一(yi)點每個tomcat配置的(de)Http Port 和 JMX Port要不同。

tomcat1 : Http Port : 8081 JMX Port : 1099tomcat2 : Http Port : 8082 JMX Port : 1100

  tomcat1和tomcat2運行成功之後,此時兩個服(fu)務都已啟動,此時只有tomcat1開始任(ren)務調度,tomcat2未進行任(ren)務調度。首先把tomcat1服(fu)務停(ting)掉,此時會(hui)出現tomcat2任(ren)務調度開始,這里跟做服(fu)務高可靠(kao)性很像。運行結果︰

==============tomcat1=====================Hello, Quartz! - executing its JOB at Fri Dec 23 11:27:00 CST 2016 by DEFAULT.job on weboneHello, Quartz! - executing its JOB at Fri Dec 23 11:27:10 CST 2016 by DEFAULT.job on weboneHello, Quartz! - executing its JOB at Fri Dec 23 11:27:20 CST 2016 by DEFAULT.job on weboneHello, Quartz! - executing its JOB at Fri Dec 23 11:27:30 CST 2016 by DEFAULT.job on weboneD:workomcatapache-tomcat-8.0.23-windows-x64apache-tomcat-8.0.23incatalina.bat stopDisconnected from server==============tomcat2=====================Hello, Quartz! - executing its JOB at Fri Dec 23 11:27:56 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:27:56 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:28:00 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:28:10 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:28:20 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:28:30 CST 2016 by DEFAULT.job on webtwoHello, Quartz! - executing its JOB at Fri Dec 23 11:28:40 CST 2016 by DEFAULT.job on webtwo[2020-02-25 23:12:48,369] Artifact clusterweb_two:war exploded: Artifact is deployed successfully

寫(xie)在最後︰Quartz基礎部分總結起來(lai)可能不多(duo),實dao)視τ彌zhu)要是Job中execute方(fang)法的(de)實現。看完上面的(de)介(jie)紹之後我們發現,Quartz使用起來(lai)非(fei)常方(fang)便,Quartz提供了很多(duo)日期和日歷類。寫(xie)過定(ding)時備份、定(ding)時查詢統計(ji)方(fang)法的(de)同學,知道(dao)這里寫(xie)起來(lai)很麻煩。Quqatz大大縮減了程(cheng)序的(de)代碼量(liang)。之前(qian)和一(yi)位同事討論了什(shi)麼ci)焙蠐uartz,很多(duo)時候我們qian)薊hui)自(zi)己寫(xie)任(ren)務調度。一(yi)般都是這樣實現的(de)︰我們會(hui)啟線(xian)程(cheng)相當于定(ding)時器,定(ding)時去查詢符合條(tiao)件的(de)Job,如果查詢到多(duo)Job同時調度,我們會(hui)啟一(yi)個線(xian)程(cheng)池多(duo)線(xian)程(cheng)並發運行。這樣看上去Quartz都具備了,使用Quartz之後代碼非(fei)常簡潔、可復用性高並且(qie)任(ren)務調度的(de)mu)沙志(zhi)眯裕 恍枰 渲uartz配置文(wen)件就可以(yi)將調度re)ren)務存到數據庫中,正是qie)蛭 獾闥yi)Quartz可以(yi)集群(qun),對于任(ren)務數很多(duo)的(de)集群(qun)環境下,這就是無與(yu)倫比的(de)優點了。如果在搭建環境或者發現文(wen)章中有不對或不足的(de)地方(fang),可以(yi)在下方(fang)留言,大家共同學習。

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