Modified interfaces to provide default methods where appropriate.

examples/src/main/java/org/quartz/examples/example9/Job1Listener.java

@@ -35,22 +35,22 @@
  */
 public class Job1Listener implements JobListener {
 
-  private static Logger _log = LoggerFactory.getLogger(Job1Listener.class);
+  private static final Logger LOG = LoggerFactory.getLogger(Job1Listener.class);
 
   public String getName() {
     return "job1_to_job2";
   }
 
   public void jobToBeExecuted(JobExecutionContext inContext) {
-    _log.info("Job1Listener says: Job Is about to be executed.");
+    LOG.info("Job1Listener says: Job Is about to be executed.");
   }
 
   public void jobExecutionVetoed(JobExecutionContext inContext) {
-    _log.info("Job1Listener says: Job Execution was vetoed.");
+    LOG.info("Job1Listener says: Job Execution was vetoed.");
   }
 
   public void jobWasExecuted(JobExecutionContext inContext, JobExecutionException inException) {
-    _log.info("Job1Listener says: Job was executed.");
+    LOG.info("Job1Listener says: Job was executed.");
 
     // Simple job #2
     JobDetail job2 = newJob(SimpleJob2.class).withIdentity("job2").build();
@@ -61,7 +61,7 @@ public void jobWasExecuted(JobExecutionContext inContext, JobExecutionException
       // schedule the job to run!
       inContext.getScheduler().scheduleJob(job2, trigger);
     } catch (SchedulerException e) {
-      _log.warn("Unable to schedule job2!");
+      LOG.warn("Unable to schedule job2!");
       e.printStackTrace();
     }
 

quartz-jobs/src/test/java/org/quartz/jobs/MyJobListener.java

@@ -16,16 +16,6 @@ public String getName() {
         return "MyJobListener";
     }
 
-    @Override
-    public void jobToBeExecuted(JobExecutionContext context) {
-        //
-    }
-
-    @Override
-    public void jobExecutionVetoed(JobExecutionContext context) {
-        //
-    }
-
     @Override
     public void jobWasExecuted(JobExecutionContext context,
             JobExecutionException jobException) {

quartz-stubs/src/main/java/org/quartz/jobs/DirectoryScanListener.java

@@ -35,5 +35,5 @@ public interface DirectoryScanListener {
      * @param updatedFiles The set of files that were updated/added since the
      * last scan of the directory
      */
-    void filesUpdatedOrAdded(File[] updatedFiles);
+    default void filesUpdatedOrAdded(File[] updatedFiles){}
 }

quartz-stubs/src/main/java/org/quartz/jobs/FileScanListener.java

@@ -26,5 +26,5 @@
  */
 public interface FileScanListener {
 
-    void fileUpdated(String fileName);
+    default void fileUpdated(String fileName){}
 }

quartz/src/main/java/org/quartz/InterruptableJob.java

@@ -70,15 +70,6 @@
  * @author James House
  */
 public interface InterruptableJob extends Job {
-
-    /*
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     * 
-     * Interface.
-     * 
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     */
-
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a user

quartz/src/main/java/org/quartz/Job.java

@@ -46,15 +46,6 @@
  * @author James House
  */
 public interface Job {
-
-    /*
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     * 
-     * Interface.
-     * 
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     */
-
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>

quartz/src/main/java/org/quartz/JobListener.java

@@ -35,15 +35,6 @@
  * @author James House
  */
 public interface JobListener {
-
-    /*
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     * 
-     * Interface.
-     * 
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     */
-
     /**
      * <p>
      * Get the name of the <code>JobListener</code>.
@@ -65,7 +56,7 @@ public interface JobListener {
      * 
      * @see #jobExecutionVetoed(JobExecutionContext)
      */
-    void jobToBeExecuted(JobExecutionContext context);
+    default void jobToBeExecuted(JobExecutionContext context){}
 
     /**
      * <p>
@@ -77,7 +68,7 @@ public interface JobListener {
      * 
      * @see #jobToBeExecuted(JobExecutionContext)
      */
-    void jobExecutionVetoed(JobExecutionContext context);
+    default void jobExecutionVetoed(JobExecutionContext context){}
 
 
     /**
@@ -87,7 +78,7 @@ public interface JobListener {
      * <code>triggered(xx)</code> method has been called.
      * </p>
      */
-    void jobWasExecuted(JobExecutionContext context,
-            JobExecutionException jobException);
+    default void jobWasExecuted(JobExecutionContext context,
+            JobExecutionException jobException){}
 
 }

quartz/src/main/java/org/quartz/SchedulerListener.java

@@ -30,22 +30,13 @@
  * @author James House
  */
 public interface SchedulerListener {
-
-    /*
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     * 
-     * Interface.
-     * 
-     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-     */
-
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
      * is scheduled.
      * </p>
      */
-    void jobScheduled(Trigger trigger);
+    default void jobScheduled(Trigger trigger){}
 
     /**
      * <p>
@@ -55,23 +46,23 @@ public interface SchedulerListener {
      * 
      * @see SchedulerListener#schedulingDataCleared()
      */
-    void jobUnscheduled(TriggerKey triggerKey);
+    default void jobUnscheduled(TriggerKey triggerKey){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
      * has reached the condition in which it will never fire again.
      * </p>
      */
-    void triggerFinalized(Trigger trigger);
+    default void triggerFinalized(Trigger trigger){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
      * has been paused.
      * </p>
      */
-    void triggerPaused(TriggerKey triggerKey);
+    default void triggerPaused(TriggerKey triggerKey){}
 
     /**
      * <p>
@@ -83,47 +74,47 @@ public interface SchedulerListener {
      * 
      * @param triggerGroup the paused group, or null if all were paused
      */
-    void triggersPaused(String triggerGroup);
+    default void triggersPaused(String triggerGroup){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link Trigger}</code>
      * has been un-paused.
      * </p>
      */
-    void triggerResumed(TriggerKey triggerKey);
+    default void triggerResumed(TriggerKey triggerKey){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a 
      * group of <code>{@link Trigger}s</code> has been un-paused.
      * </p>
      */
-    void triggersResumed(String triggerGroup);
+    default void triggersResumed(String triggerGroup){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
      * has been added.
      * </p>
      */
-    void jobAdded(JobDetail jobDetail);
+    default void jobAdded(JobDetail jobDetail){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
      * has been deleted.
      * </p>
      */
-    void jobDeleted(JobKey jobKey);
+    default void jobDeleted(JobKey jobKey){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
      * has been paused.
      * </p>
      */
-    void jobPaused(JobKey jobKey);
+    default void jobPaused(JobKey jobKey){}
 
     /**
      * <p>
@@ -133,23 +124,23 @@ public interface SchedulerListener {
      * 
      * @param jobGroup the paused group, or null if all were paused
      */
-    void jobsPaused(String jobGroup);
+    default void jobsPaused(String jobGroup){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a <code>{@link org.quartz.JobDetail}</code>
      * has been un-paused.
      * </p>
      */
-    void jobResumed(JobKey jobKey);
+    default void jobResumed(JobKey jobKey){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> when a 
      * group of <code>{@link org.quartz.JobDetail}s</code> has been un-paused.
      * </p>
      */
-    void jobsResumed(String jobGroup);
+    default void jobsResumed(String jobGroup){}
 
     /**
      * <p>
@@ -165,51 +156,65 @@ public interface SchedulerListener {
      * error that was encountered.
      * </p>
      */
-    void schedulerError(String msg, SchedulerException cause);
+    default void schedulerError(String msg, SchedulerException cause){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that it has move to standby mode.
      * </p>
      */
-    void schedulerInStandbyMode();
+    default void schedulerInStandbyMode(){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that it has started.
      * </p>
      */
-    void schedulerStarted();
-
+    default void schedulerStarted() {}
+
+    /**
+     * <p>
+     * Called by the <code>{@link Scheduler}</code> to inform the listener
+     * that it has paused.
+     * </p>
+     */
+    default void schedulerPaused(){}
+
+    /**
+     * Called by the <code>{@link Scheduler}</code> to inform the listener that
+     * the scheduler has resumed after being paused.
+     */
+    default void schedulerResumed(){}
+
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that it is starting.
      * </p>
      */
-    void schedulerStarting();
+    default void schedulerStarting(){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that it has shutdown.
      * </p>
      */
-    void schedulerShutdown();
+    default void schedulerShutdown(){}
 
     /**
      * <p>
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that it has begun the shutdown sequence.
      * </p>
      */
-    void schedulerShuttingdown();
+    default void schedulerShuttingdown(){}
 
     /**
      * Called by the <code>{@link Scheduler}</code> to inform the listener
      * that all jobs, triggers and calendars were deleted.
      */
-    void schedulingDataCleared();
+    default void schedulingDataCleared(){}
 }