Quartz Scheduler: How to pass custom objects as JobParameter?

Question

I am planning to write a ASP.NET page to trigger the job on demand. Currently, I am using SimpleTrigger class to trigger the job but none of the __Trigger class supports object type as value in JobParameters and it has come to my knowledge that WCF Tcp binding is used under the hook to pass the parameters to job scheduling engine. I would like to know how to pass custom object (serializable) as job parameters. Thanks for your advice!

Answer 1

There are two ways to pass an object that can be retrieved when a Quartz job executes:

Pass the instance in the data map. When you set the job up, add your instance to the map with a key like this:

// Create job etc...
var MyClass _myInstance;
statusJob.JobDataMap.Put("myKey", _myInstance);
// Schedule job...

Retrieve the instance in the job's Execute() method like this:

public void Execute(IJobExecutionContext context)
        {
            var dataMap = context.MergedJobDataMap;
            var myInstance = (MyClass)dataMap["myKey"];

OR

Add the instance to the scheduler context when you set the job up, like this:

  ISchedulerFactory schedFact = new StdSchedulerFactory();
  _sched = schedFact.GetScheduler();
  _sched.Start();
  // Create job etc...
  var MyClass _myInstance;
  _sched.Context.Put("myKey", myInstance);
  // Schedule job...

Retrieve the instance in the job's Execute() method like this:

public void Execute(IJobExecutionContext context)
        {
            var schedulerContext = context.Scheduler.Context;
            var myInstance = (MyClass)schedulerContext.Get("myKey");

Answer 2

When you schedule a job you can set a JobDataMap on the JobDetail object and pass this to your scheduler, there are some limitations described in the quartz.net tutorial. The job can access the data via:

JobDataMap dataMap = context.JobDetail.JobDataMap;

However I prefer to access my job configuration, via an repository injected into the job.