spring quartz学习总结： cluster的配置和示例
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简介
在前面一篇文章里我们讨论了quartz和spring quartz的基本流程以及配置，这里针对一些quartz应用的场景和配置重点解读一下quartz的cluster配置和应用。
cluster配置
在前面的执行quartz任务的环境里，我们都是在单独的一台机器上执行任务。这种单点执行的方式存在着一些问题。比如说，如果需要执行的任务量比较大，单台机器处理不过来。另外，如果这单独的节点失效了，整个节点上执行的所有任务也就都失败了。至少从这两点来说，如果我们要解决些问题的话，就需要考虑去除单点失效的问题并使用负载均衡来提高性能。
说了这么多，其实在quartz里采用cluster模式的配置就是来解决上述问题的。quartz的cluster配置模型和我们传统的一些cluster系统模型有点不一样。一般的系统我们可能会考虑用LVS, keepalived等之类的东西来配，而这里是采用一个集中的数据库来保证负载均衡。它的配置模型如下：
这种模型是怎么保证系统的高可用性和性能的呢？在这里，因为每个节点都执行不同的job，我们必须保证对于给定的任务只是在单独的一个节点上执行。所以当cluster里最先能够抢占到该任务的节点执行的时候，它会对数据库里对应这个任务的行加锁，然后后续的就不能再去占用了。通过利用锁的机制，这里也比较容易实现一个负载均衡，每次节点只要去取到那些没有被加锁的任务执行就可以了。关于quartz的内部执行细节会在后续的文章里描述。
很明显，如果要在一个集群的模式下设置多个节点，每个节点必然会执行一到多个任务。这些任务的分配和执行情况需要记录和跟踪。同时怎么来调度资源协调它们也是一个需要考虑的问题。好在quartz里面已经提供了一些默认的配置支持，比如线程池和数据库连接池。一个典型的示例配置如下：
#============================================================================ # Configure Main Scheduler Properties #============================================================================ org.quartz.scheduler.instanceName = MyClusteredScheduler org.quartz.scheduler.instanceId = AUTO #============================================================================ # Configure ThreadPool #============================================================================ org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool org.quartz.threadPool.threadCount = 25 org.quartz.threadPool.threadPriority = 5 #============================================================================ # Configure JobStore #============================================================================ org.quartz.jobStore.misfireThreshold = 60000 org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.oracle.OracleDelegate org.quartz.jobStore.useProperties = false org.quartz.jobStore.dataSource = myDS org.quartz.jobStore.tablePrefix = QRTZ _ org.quartz.jobStore.isClustered = true org.quartz.jobStore.clusterCheckinInterval = 20000 #============================================================================ # Configure Datasources #============================================================================ org.quartz.dataSource.myDS.driver = oracle.jdbc.driver.OracleDriver org.quartz.dataSource.myDS.URL = jdbc:oracle:thin:@polarbear:1521:dev org.quartz.dataSource.myDS.user = quartz org.quartz.dataSource.myDS.password = quartz org.quartz.dataSource.myDS.maxConnections = 5 org.quartz.dataSource.myDS.validationQuery=select 0 from dual因为需要配置成集群的模式，这里所有的任务数据需要记录到数据库中间。而以往默认创建的scheduler都是将任务数据记录在ramstore里，也就是这些数据都保存在内存中。另外，既然在多个节点中执行任务，每个任务执行的时间长短已经启动的时间点都不一样。所以需要为它们安排一个线程池来方便调度。同时，多个节点的更新都要访问数据库，所以这里对数据库的连接也最好使用连接池。前面的示例中使用了oracle的thin连接，并将线程池的容量配置成２５个。
到这里，cluster的基本配置已经差不多了。我们来结合具体的示例看看配置运行的结果。
示例
quartz api示例
我们可以开始第一个最简单的示例，在这个示例里先不使用任何spring相关的配置，而是用原生的quartz api。首先创建一个maven工程SimpleQuartzCluster, 其pom.xml文件如下：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.chanjet.chanapp</groupId> <artifactId>SimpleQuartzCluster</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>SimpleQuartzCluster</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <junit.version>4.11</junit.version> <quartz.version>2.1.6</quartz.version> <mysql.connector.version>5.1.10</mysql.connector.version> </properties> <dependencies> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>${quartz.version}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.connector.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> </dependencies> </project> 因为考虑到后面我们将cluster的数据保存到mysql数据库中，所以这里引入了mysql-connector，在实际的应用中可以引入需要的库。
和原来的套路一样，我们先定义一个简单的job实现:
package com.chanjet.chanapp; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; public class SimpleJob implements Job { public void execute(JobExecutionContext context) throws JobExecutionException { System.out.println("Job executed..."); } } 简单，不解释。
然后我们将定义JobDetail, trigger的代码放到执行的main方法里：
package com.chanjet.chanapp; import org.quartz.CronScheduleBuilder; import org.quartz.JobBuilder; import org.quartz.JobDetail; import org.quartz.Scheduler; import org.quartz.SchedulerException; import org.quartz.SchedulerFactory; import org.quartz.Trigger; import org.quartz.TriggerBuilder; import org.quartz.impl.StdSchedulerFactory; public class App { public static void main( String[] args ) throws SchedulerException, InterruptedException { SchedulerFactory sf = new StdSchedulerFactory(); Scheduler sched = sf.getScheduler(); JobDetail job = JobBuilder.newJob(SimpleJob.class).build(); Trigger trigger = TriggerBuilder .newTrigger() .withIdentity("testTrigger1", "group1") .withSchedule(CronScheduleBuilder.cronSchedule("0/4 * * * * ?")) .build(); sched.scheduleJob(job, trigger); sched.start(); Thread.sleep(90L * 1000L); sched.shutdown(true); } } 我们定义了job，然后通过trigger每４秒钟启动一次job。这里的代码和前面的文章里讲到的示例一样，没有什么特殊的地方。
稍微有点不一样的地方是我们在这里还要添加一个properties文件，我们放到resources的目录下面，properties文件名为quartz.properties:
#============================================================================ # Configure Main Scheduler Properties #============================================================================ org.quartz.scheduler.instanceName: TestScheduler1 org.quartz.scheduler.instanceId: instance1 org.quartz.scheduler.skipUpdateCheck: true #============================================================================ # Configure ThreadPool #============================================================================ org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool org.quartz.threadPool.threadCount: 5 org.quartz.threadPool.threadPriority: 5 #============================================================================ # Configure JobStore #============================================================================ org.quartz.jobStore.misfireThreshold: 60000 org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate org.quartz.jobStore.useProperties=false org.quartz.jobStore.dataSource=myDS org.quartz.jobStore.tablePrefix=QRTZ_ org.quartz.jobStore.isClustered=true #============================================================================ # Other Example Delegates #============================================================================ #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v6Delegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v7Delegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DriverDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.HSQLDBDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.MSSQLDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PointbaseDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PostgreSQLDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.WebLogicDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.OracleDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.WebLogicOracleDelegate #============================================================================ # Configure Datasources #============================================================================ org.quartz.dataSource.myDS.driver: com.mysql.jdbc.Driver org.quartz.dataSource.myDS.URL: jdbc:mysql://localhost:3306/qrtz org.quartz.dataSource.myDS.user: root org.quartz.dataSource.myDS.password: pwd org.quartz.dataSource.myDS.maxConnections: 5 org.quartz.dataSource.myDS.validationQuery: select 0 #============================================================================ # Configure Plugins #============================================================================ #org.quartz.plugin.shutdownHook.class: org.quartz.plugins.management.ShutdownHookPlugin #org.quartz.plugin.shutdownHook.cleanShutdown: true #org.quartz.plugin.triggHistory.class: org.quartz.plugins.history.LoggingJobHistoryPlugin这里的resources是我们创建的一个source folder，在执行的时候这个目录里的内容可以被jvm来装载。因为它是被定义在classpath中的。
如果我们简单的执行程序，会看到如下的输出：
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. Dec 17, 2014 6:31:10 AM com.mchange.v2.log.MLog <clinit> INFO: MLog clients using java 1.4+ standard logging. Dec 17, 2014 6:31:10 AM com.mchange.v2.c3p0.C3P0Registry banner INFO: Initializing c3p0-0.9.1.1 [built 15-March-2007 01:32:31; debug? true; trace: 10] Dec 17, 2014 6:31:10 AM com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager INFO: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> z8kfsx96ollhm9r8reo7|719f9c2e, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> z8kfsx96ollhm9r8reo7|719f9c2e, idleConnectionTestPeriod -> 50, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/qrtz, lastAcquisitionFailureDefaultUser -> null, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 5, maxStatements -> 0, maxStatementsPerConnection -> 120, minPoolSize -> 1, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> select 0, properties -> {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> true, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ] Job executed... Job executed... Job executed... 这里的输出内容每４秒钟打印一次。按照前面的配置内容，我们去看数据库里的内容：mysql> select * from QRTZ_CRON_TRIGGERS; +----------------+--------------+---------------+-----------------+---------------------+ | SCHED_NAME | TRIGGER_NAME | TRIGGER_GROUP | CRON_EXPRESSION | TIME_ZONE_ID | +----------------+--------------+---------------+-----------------+---------------------+ | TestScheduler1 | testTrigger1 | group1 | 0/4 * * * * ? | America/Los_Angeles | +----------------+--------------+---------------+-----------------+---------------------+ 1 row in set (0.00 sec)因为前面代码里定义了触发器trigger是crontrigger，这里就显示了trigger name和group。
mysql> select * from QRTZ_SCHEDULER_STATE; +----------------+---------------+-------------------+------------------+ | SCHED_NAME | INSTANCE_NAME | LAST_CHECKIN_TIME | CHECKIN_INTERVAL | +----------------+---------------+-------------------+------------------+ | TestScheduler1 | instance1 | 1418826761247 | 7500 | +----------------+---------------+-------------------+------------------+ 1 row in set (0.00 sec)配置文件里定义的内容instancename, instanceid在这里都有对应上了。
为什么我们定义好之后只要把properties文件放到classpath就可以实现这个cluster的效果呢？其实原因很简单，quartz已经帮我们做了大部分的事情了。在默认的情况下quartz会去找classpath中默认名字为quartz.properties的文件，然后按照这里的配置来执行。如果我们的classpath里没有这个文件的话，它会去装载quartz jar包里的quartz.properties文件。在这个文件里，相当于它的默认配置，是没有使用持久化的存储，而是使用的ramstore。在实际应用的过程中，为了防止一个job被重复启动和并发的执行，有时候我们需要在job的定义实现上添加一些限制，如@PersistJobDataAfterExecution @DisallowConcurrentExecution。
这样，一个最简单的quartz cluster示例就完成了。我们再来看看结合spring的情况下该怎么配。
spring quartz示例
我们首先建一个maven工程SpringQuartzClusterSample，其pom.xml文件配置如下：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.yunzero</groupId> <artifactId>SpringQuartzClusterSample</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>SpringQuartzClusterSample</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>4.0.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.0.4.RELEASE</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.1</version> </dependency> <!-- jdbc driver begin --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.21</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.0.4.RELEASE</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> </dependencies> </project>
这里主要引用了spring的一些基本配置和运行时需要访问数据库的jdbc driver。
然后我们定义一个实现的job:
package com.yunzero; import org.quartz.DisallowConcurrentExecution; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.quartz.PersistJobDataAfterExecution; import org.springframework.scheduling.quartz.QuartzJobBean; @PersistJobDataAfterExecution @DisallowConcurrentExecution public class SimpleJob extends QuartzJobBean { @Override protected void executeInternal(JobExecutionContext arg0) throws JobExecutionException { System.out.println("Job started.."); } } 也是一个简单的打印输出。
剩下的就是在配置文件里配置好jobdetails, triggers等这些：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="firstJobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean"> <property name="jobClass" value="com.yunzero.SimpleJob"/> <property name="durability" value="true" /> <property name="requestsRecovery" value="true" /> </bean> <bean id="firstTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean"> <property name="jobDetail" ref="firstJobDetail" /> <property name="cronExpression" value="0/5 * * ? * * *" /> </bean> <bean name="quartzScheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="configLocation" value="classpath:quartz.properties" /> <property name="jobDetails"> <list> <ref bean="firstJobDetail"/> </list> </property> <property name="triggers"> <list> <ref bean="firstTrigger"/> </list> </property> </bean> </beans>
我们这里和普通的配置差不多，这里唯一有差异的两个地方是在jobDetails里面设置它的durability属性为true，另外还在quartzScheduler里配置了configLocation，它引用了quartz.properties文件。在quartz.properties里我们配置了计划任务集群的详细信息：
#============================================================================ # Configure Main Scheduler Properties #============================================================================ org.quartz.scheduler.instanceName: TestScheduler1 org.quartz.scheduler.instanceId: instance1 org.quartz.scheduler.skipUpdateCheck: true #============================================================================ # Configure ThreadPool #============================================================================ org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool org.quartz.threadPool.threadCount: 5 org.quartz.threadPool.threadPriority: 5 #============================================================================ # Configure JobStore #============================================================================ org.quartz.jobStore.misfireThreshold: 60000 org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreTX org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate org.quartz.jobStore.useProperties=false org.quartz.jobStore.dataSource=myDS org.quartz.jobStore.tablePrefix=QRTZ_ org.quartz.jobStore.isClustered=true #============================================================================ # Other Example Delegates #============================================================================ #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v6Delegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DB2v7Delegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.DriverDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.HSQLDBDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.MSSQLDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PointbaseDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PostgreSQLDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.WebLogicDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.OracleDelegate #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.oracle.WebLogicOracleDelegate #============================================================================ # Configure Datasources #============================================================================ org.quartz.dataSource.myDS.driver: com.mysql.jdbc.Driver org.quartz.dataSource.myDS.URL: jdbc:mysql://localhost:3306/qrtz org.quartz.dataSource.myDS.user: root org.quartz.dataSource.myDS.password: test org.quartz.dataSource.myDS.maxConnections: 5 org.quartz.dataSource.myDS.validationQuery: select 0 #============================================================================ # Configure Plugins #============================================================================ #org.quartz.plugin.shutdownHook.class: org.quartz.plugins.management.ShutdownHookPlugin #org.quartz.plugin.shutdownHook.cleanShutdown: true #org.quartz.plugin.triggHistory.class: org.quartz.plugins.history.LoggingJobHistoryPlugin这部分和前面的配置基本上没有差异。然后剩下的就是启动spring container的部分：
package com.yunzero; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class App { public static void main( String[] args ) { ApplicationContext springContext = new ClassPathXmlApplicationContext("applicationContext.xml"); } } 如果我们运行程序的话，会得到如下的输出：Dec 22, 2014 10:41:04 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@3344c133: startup date [Mon Dec 22 22:41:04 CST 2014]; root of context hierarchy Dec 22, 2014 10:41:04 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [applicationContext.xml] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. Dec 22, 2014 10:41:04 PM org.springframework.scheduling.quartz.SchedulerFactoryBean initSchedulerFactory INFO: Loading Quartz config from [class path resource [quartz.properties]] Dec 22, 2014 10:41:04 PM com.mchange.v2.log.MLog <clinit> INFO: MLog clients using java 1.4+ standard logging. Dec 22, 2014 10:41:04 PM com.mchange.v2.c3p0.C3P0Registry banner INFO: Initializing c3p0-0.9.1.1 [built 15-March-2007 01:32:31; debug? true; trace: 10] Dec 22, 2014 10:41:04 PM com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager INFO: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> z8kfsx96vr5hgx1nwo0d3|109999f1, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> z8kfsx96vr5hgx1nwo0d3|109999f1, idleConnectionTestPeriod -> 50, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/qrtz, lastAcquisitionFailureDefaultUser -> null, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 5, maxStatements -> 0, maxStatementsPerConnection -> 120, minPoolSize -> 1, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> select 0, properties -> {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> true, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ] Dec 22, 2014 10:41:05 PM org.springframework.context.support.DefaultLifecycleProcessor start INFO: Starting beans in phase 2147483647 Dec 22, 2014 10:41:05 PM org.springframework.scheduling.quartz.SchedulerFactoryBean startScheduler INFO: Starting Quartz Scheduler now Job started.. Job started.. Job started.. Job started.. Job started.. Job started.. 因为配置的任务是每5秒钟执行一次，所以每次会在屏幕打印输出内容。如果我们去检查数据库的话，也会发现和上面示例类似的内容。
这样，一个spring quartz的cluster示例就配置完成了。具体的细节可以参照后面的附件。
参考材料
http://quartz-scheduler.org/generated/2.2.1/html/qs-all/#page/Quartz_Scheduler_Documentation_Set%2Fre-cls_cluster_configuration.html%23
http://pawel-malczyk.pl/wordpress/?p=240
http://tech.meituan.com/mt-crm-quartz.html
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