SimpleScheduledRoutePolicy does not work on the specific time - apache-camel

Question

I'm developing a web application where user adds issue specifying the date and time on which he/she should get a notification mail. I'm new to apache camel and quartz scheduler.
I have written a sample code as below. IssueDTO is nothing but a POJO. If the issue is repetitive, I have configured a cron scheduler which works properly i.e. if I specify frequency as 5, I get the expected output which is a println statement to the console. But if the issue is not repetitive, I have used SimpleScheduledRoutePolicy and hardcoded the date and time at which process() method of the Processor should run. I simply change the date time to 2 min later of the current system time to check whether code is working. But it never enters the process method and does print this statement => System.out.println("*****************" + issueDTO.getIssueId() + " running at " + gc.getTime().toString());
#Override
public void configure() throws Exception
{
System.out.println("in ReminderRouteBuilder configure()");
System.out.println("Issue ID : " + issueDTO.getIssueId());
System.out.println("Issue Frequency : " + issueDTO.getFrequency());
System.out.println("Is Repetative : " + issueDTO.getIsRepetitive());
// if Repetitive
if (StringUtil.getBoolean(issueDTO.getIsRepetitive()))
{
String fromString = "quartz2://" + issueDTO.getIssueId() + "?cron=0/" + issueDTO.getFrequency() + "+*+*+*+*+?";
from(fromString).process(new Processor() {
#Override
public void process(Exchange exchange) throws Exception
{
System.out.println(issueDTO.getIssueId() + " running every " + issueDTO.getFrequency() + " sec...");
}
});
}
// if not Repetitive
else
{
SimpleScheduledRoutePolicy policy = new SimpleScheduledRoutePolicy();
GregorianCalendar gc = new GregorianCalendar(2019, Calendar.AUGUST, 31, 13, 45);
policy.setRouteStartDate(gc.getTime());
from("direct:start").routeId(issueDTO.getIssueId()).routePolicy(policy).process(new Processor() {
#Override
public void process(Exchange exchange) throws Exception
{
System.out.println("*****************" + issueDTO.getIssueId() + " running at " + gc.getTime().toString());
}
});
}
}
Am I missing something?

Answer 1

Direct endpoint needs to be triggered manualy with some event. If you need something, what is triggered automatically after start of route, you can use Timer endpoint with repeatCount=1 or Quartz endpoint with fireNow=true.
E.g. this will trigger Exchange only once, after route startup:
from("timer:start?repeatCount=1").routeId(issueDTO.getIssueId()).routePolicy(policy)

Answer 2

Ok.. I got the solution :).
I used the cron expression specifying exact date and time and it worked.
#Override
public void configure() throws Exception
{
System.out.println("in ReminderRouteBuilder configure()");
System.out.println("Issue ID : " + issueDTO.getIssueId());
System.out.println("Issue Frequency : " + issueDTO.getFrequency());
System.out.println("Is Repetative : " + issueDTO.getIsRepetitive());
// if Repetitive
if (StringUtil.getBoolean(issueDTO.getIsRepetitive()))
{
String fromString = "quartz2://" + issueDTO.getIssueId() + "?cron=0/" + issueDTO.getFrequency() + "+*+*+*+*+?";
from(fromString).process(new Processor() {
#Override
public void process(Exchange exchange) throws Exception
{
System.out.println(issueDTO.getIssueId() + " running every " + issueDTO.getFrequency() + " sec...");
}
});
}
// if not Repetitive
else
{
String fromString = "quartz2://" + issueDTO.getIssueId() + "?cron=0 40 12 4 SEP ? 2019";
from(fromString).process(new Processor() {
#Override
public void process(Exchange exchange) throws Exception
{
System.out.println(issueDTO.getIssueId() + " running now");
}
});
}
}