java task scheduler example

framework: Quartz. Quartz is a pure Java implementation, and as spring's default scheduling framework, due to Quartz's powerful scheduling function, flexible use, but also has the ability to distribute the cluster, can say quartz, can take care of all scheduled task scheduling! Architecture of the QuartzFirst Look at a demo: Description 1, from the code point of view, there are xxxbuilder

unable to meet the complicated schedule task scheduling scenario. So Opensymphony provides a powerful open source task scheduling framework: Quartz. Quartz is a pure Java implementation, and as spring's default scheduling framework, due to Quartz's powerful scheduling function, flexible use, but also has the ability to distribute the cluster, can say quartz, can

Reference:Not currently1 CreateEvent Event_demo2 onSchedule3Every1 DayStarts'2014-12-23 16:07:00'4 Do5 Insert intoDemo1 (col1, col2)Values(Date_format (Date_add (now), interval-1 Day),'%y-%m-%d'), Date_format (now (),'%y-%m-%d'));6 7 AlterEvent Event_demo8 onSchedule9Every1 DayStarts'2014-12-23 16:08:00'Ten Do One Insert intoDemo1 (col1, col2)Values(Date_format (Date_add (now), interval-1 Day),'%y-%m-%d'), Date_format (now (),'%y-%m-%d')); A - -Show variables like '%event%'; the - D

...Execute Job 3 every 5 seconds ...# # # removal JOB3 # # #Execute Job 1 every 5 seconds ...Execute Job 2 every 5 seconds ...# # # Pause Job1 and Job2 # # ## # # starts again job1 # # #Execute Job 1 every 5 seconds ...Execute Job 1 every 5 seconds ...# # # Modify JOB1 cron to execute once every 3 seconds # # #Execute Job 1 every 3 seconds ...Execute Job 1 every 3 seconds ...# # # Print the status of all jobs in memory # # #Execute Job 1 every 3 seconds ...Trigger details:job1, JobGroup1, NORMA

Hello to the world and display the Date/time System.out . println ("Hello world! -"+ new Date ());}} Package Test.quartz;import Org.quartz.jobbuilder;import Org.quartz.jobdetail;import org.quartz.scheduler;import Org.quartz.schedulerfactory;import Org.quartz.simpleschedulebuilder;import Org.quartz.trigger;import Org.quartz.triggerbuilder;public class Simpletriggerrunner {public static void main (string[] args) throws Exception {Sch Edulerfactory schedfact = new Org.quartz.impl.StdSchedulerFacto

Some functions such as timing function and certain methods can be implemented by timing task scheduling framework quartz. The following provides a simple example of implementing the quartz framework of Hello World.Importorg.quartz.CronExpression;ImportOrg.quartz.CronTrigger;ImportOrg.quartz.Job;ImportOrg.quartz.JobDetail;ImportOrg.quartz.JobExecutionContext;Importorg.quartz.JobExecutionException;ImportOrg.q

In the previous article of the Java Timer Task Scheduler to get started in detail (a) article, the main introduction of the next timer, next we look at the timer of some common methods.1, schedule () 4 kinds of usage.First Type: Schedule (timertask task, Date time);Task: Sch

Java timed tasks that perform tasks on a daily schedule. The following is the entire code for this example.public class Timermanager {Time intervalPrivate static final Long Period_day = 24 * 60 * 60 * 1000;Public Timermanager () {Calendar calendar = Calendar.getinstance ();/*** customizing Daily 2:00 execution Method ***/Calendar.set (Calendar.hour_of_day, 2);Calendar.set (calendar.minute, 0);Calendar.set (Calendar.second, 0);Date Date=calendar.gettim

); } return NULL; }} Execute 2017-03-10 20:03:53job1execute 2017-03-10 20:03:54job2execute 2017-03-10 20:03:54job1execute 2017-03-10 20:03:55job1execute 2017-03-10 20:03:56job1execute 2017-03-10 20:03:56job2execute 2017-03-10 20:03:57job1execute 2017-03-10 20:03:58job1execute 2017-03-10 20:03:58job2execute 2017-03-10 20:03:59job1execute 2017-03-10 20:04:00job1execute 2017-03-10 20:04:0 0job2execute 2017-03-10 20:04:01job1execute 2017-03-10 20:04:0 2job1execute 2017-03-10 20:

First, quartz learning Java Framework Introduction: Quartz from beginner to advancedHttp://edu.yesky.com/edupxpt/233/2209233.shtmlExample: http://javacrazyer.iteye.com/blog/675460http://blog.csdn.net/lotusyangjun/article/details/6450421Official website: http://www.quartz-scheduler.orgSecond, Scheduledthreadpoolexecutor studyJDK5 after Java introduced the Scheduledthreadpoolexecutor, theoretically no longer

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2. Configuration of the event scheduler 2.1 Event Scheduler Status To ensure that the events you create work correctly, you should first turn on the event scheduler, which allows you to view the scheduler status in 3 ways: Show VARIABLES like ' Event_scheduler '; SELECT @ @event_scheduler; Show Process

relationship with N), while O (N ^ 2) is the square of the number of inputs. O (1) is irrelevant to the input. You can complete the operation within a fixed period of time. In the Symmetric Multi-Processing System (SMP), The scheduler before version 2.6 uses a running queue for all processors. This means that a task can be scheduled on any processor-this is a good thing for Server Load balance

][COMMENT ' COMMENT '][ENABLE | DISABLE][do sql_statement]　　1) Temporary Shutdown eventALTER EVENT e_test DISABLE;2) Turn on eventALTER EVENT e_test ENABLE;3) Change the daily empty test table to 5 days to clear:ALTER EVENT e_test on SCHEDULE every 5 day;The Delete events (drop event) syntax is simple, as follows:DROP EVENT [IF EXISTS] Event_NameFor example, delete the previously created E_test eventDROP EVENT e_test;Of course the premise is that this

To see if the event Scheduler is currently open, you can perform the following sql: Show VARIABLES like ' Event_scheduler ';Or SELECT @ @event_scheduler;Or Show Processlist;If the display: +-----------------+-------+| variable_name | Value |+-----------------+-------+| Event_scheduler | Off |+-----------------+-------+You can perform SET GLOBAL event_scheduler = 1;Or SET GLOBAL event_scheduler = on;To open, you can also directly add "–event_sche

at[option]...timetime: hh:mm[yyyy-mm-dd]noon,midnight,teatime noon, at night, Tea time (four o'clock in the afternoon) tomorrow tomorrow now+#unit:minutes,hours, days,orweeksat jobs have queues, denoted by a single letter, and by default use the A queue; common options: -l: View Job queue, equivalent to atq -f/path/from/somefile: Reads the job task from the specified file without having to interactively enter the; at-ffilenow+5min NBSP;-D: Deletes t

the range of valid values at a given point in time, indicating "every ..."(3) Discrete value: #,#,#(4) Continuous value:-,#-#(5) in the specified time range, define the step length,/#: #即为步长Example: Echo command every 3 hours0 */3 * * * gentoo/bin/echo "howdy!"User cron:crontab command definition, each user has a dedicated cron task file:/var/spool/cron/usernamecrontab command:crontab [-u user] [-l |-r |-e

true, a task that is not returned for a specified time will start another task to run. In fact, for general applications, this may actually reduce the time it takes to run a task, but it also wastes the computing resources of the cluster.Therefore, this setting is not recommended for offline applications.Org.apache.spark.scheduler.cluster.SparkDeploySchedulerBac

# Include # Include # Include # Include # Include # Include # Include //////////////////////////////////////// ////////////////////////////////// // Function name: deletetask // Function: deletes a specified task scheduler. // Parameter description: lpcwsztaskname: name of the task plan to be deleted //////////////////////////////////////// /////////////////////