JBRULES-3146 rules with timers do not persist

(cherry picked from commit e8061e1)

drools-core/src/main/java/org/drools/time/impl/TrackableTimeJobFactoryManager.java

@@ -0,0 +1,68 @@
+package org.drools.time.impl;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.drools.command.CommandService;
+import org.drools.time.InternalSchedulerService;
+import org.drools.time.Job;
+import org.drools.time.JobContext;
+import org.drools.time.JobHandle;
+import org.drools.time.SelfRemovalJob;
+import org.drools.time.SelfRemovalJobContext;
+import org.drools.time.Trigger;
+import org.drools.time.impl.TimerJobFactoryManager;
+import org.drools.time.impl.TimerJobInstance;
+
+public class TrackableTimeJobFactoryManager
+    implements
+    TimerJobFactoryManager {
+
+    private Map<Long, TimerJobInstance> timerInstances;
+
+    public TrackableTimeJobFactoryManager() {
+        timerInstances = new ConcurrentHashMap<Long, TimerJobInstance>();
+    }
+
+    public TimerJobInstance createTimerJobInstance(Job job,
+                                                   JobContext ctx,
+                                                   Trigger trigger,
+                                                   JobHandle handle,
+                                                   InternalSchedulerService scheduler) {
+        ctx.setJobHandle( handle );
+        DefaultTimerJobInstance jobInstance = new DefaultTimerJobInstance( new SelfRemovalJob( job ),
+                                                                           new SelfRemovalJobContext( ctx,
+                                                                                                      timerInstances ),
+                                                                           trigger,
+                                                                           handle,
+                                                                           scheduler );
+
+        return jobInstance; 
+    }
+
+    public void addTimerJobInstance(TimerJobInstance instance) {
+
+        this.timerInstances.put( instance.getJobHandle().getId(),
+                                 instance );
+    }
+
+    public void removeTimerJobInstance(TimerJobInstance instance) {
+
+        this.timerInstances.remove( instance.getJobHandle().getId() );
+    }
+
+    public Collection<TimerJobInstance> getTimerJobInstances() {
+        return timerInstances.values();
+    }
+
+    public void setCommandService(CommandService commandService) {
+
+    }
+
+    public CommandService getCommandService() {
+        return null;
+    }
+
+}