User friendly log message on job setup

build.sbt

@@ -13,6 +13,7 @@ libraryDependencies ++= Seq(
   "com.typesafe.akka"   %% "akka-actor-typed" % "2.6.10" % "provided",
   "org.quartz-scheduler" % "quartz"           % "2.3.2"
     exclude ("com.zaxxer", "HikariCP-java7"),
+  "net.redhogs.cronparser" % "cron-parser-core" % "3.5",
   "com.typesafe.akka" %% "akka-testkit"             % "2.6.10" % Test,
   "com.typesafe.akka" %% "akka-actor-testkit-typed" % "2.6.10" % Test,
   "org.specs2"        %% "specs2-core"              % "4.5.1"  % Test,

src/main/scala/QuartzSchedulerExtension.scala

@@ -387,7 +387,7 @@ class QuartzSchedulerExtension(system: ActorSystem) extends Extension {
    */
   private[quartz] def scheduleJob(name: String, receiver: AnyRef, msg: AnyRef, startDate: Option[Date])(schedule: QuartzSchedule): Date = {
     import scala.collection.JavaConverters._
-    log.info("Setting up scheduled job '{}', with '{}'", name, schedule)
+    log.debug("Setting up scheduled job '{}', with '{}'", name, schedule)
     val jobDataMap = Map[String, AnyRef](
       "logBus" -> system.eventStream,
       "receiver" -> receiver,
@@ -409,6 +409,14 @@ class QuartzSchedulerExtension(system: ActorSystem) extends Extension {
     val trigger = schedule.buildTrigger(name, startDate)
 
     log.debug("Scheduling Job '{}' and Trigger '{}'. Is Scheduler Running? {}", job, trigger, scheduler.isStarted)
+
+    log.info("Job {} will be triggered {} ({}) {}.",
+      name,
+      schedule.triggerDescription.getOrElse(s"with $trigger"),
+      s"timezone: ${schedule.timezone.toZoneId}",
+      schedule.calendar.map(c => s"with calendar: $c").getOrElse("without calendar")
+    )
+
     scheduler.scheduleJob(job, trigger)
   }
 

src/main/scala/QuartzSchedules.scala

@@ -1,13 +1,17 @@
 package com.typesafe.akka.extension.quartz
 
-import com.typesafe.config.{ConfigObject, ConfigException, Config}
+import com.typesafe.config.{Config, ConfigException, ConfigObject}
 import java.util.TimeZone
 import java.util.Date
+
 import scala.util.control.Exception._
 import org.quartz._
+
 import collection.immutable
 import java.text.ParseException
 
+import net.redhogs.cronparser.{CasingTypeEnum, CronExpressionDescriptor, Options}
+
 import scala.collection.JavaConverters._
 
 /**
@@ -85,6 +89,10 @@ sealed trait QuartzSchedule {
   //than one calendar anyways.
   def calendar: Option[String]
 
+  def timezone: TimeZone
+
+  def triggerDescription: Option[String]
+
   /**
     * Utility method that builds a trigger with the data this schedule contains, given a name.
     * Job association can happen separately at schedule time.
@@ -120,5 +128,13 @@ final class QuartzCronSchedule(val name: String,
 
   // Do *NOT* build, we need the uncompleted builder. I hate the Quartz API, truly.
   val schedule = CronScheduleBuilder.cronSchedule(expression).inTimeZone(timezone)
+
+
+  def triggerDescription: Option[String] = {
+    val options = new Options
+    options.setTwentyFourHourTime(true)
+    options.setCasingType(CasingTypeEnum.LowerCase)
+    Some(CronExpressionDescriptor.getDescription(expression.getCronExpression, options))
+  }
 }