preventing starting active tasks

modules/xetics-lean-connector/src/xetics.module.ts

@@ -125,6 +125,20 @@ export class XeticsInterfaceClient
   })
   public currentTask = new NopeObservable<MESTask>();
 
+  /**
+   * Property containing the current Task of the Client.
+   *
+   * @memberof XeticsInterfaceClient
+   */
+  @exportProperty({
+    mode: ["publish"],
+    topic: "taskActive",
+    schema: {
+      type: "boolean"
+    }
+  })
+  public taskActive = new NopeObservable<boolean>();
+
   /**
    * List containing the available Tasks for the Client.
    * You can randomly pick one.
@@ -227,6 +241,12 @@ export class XeticsInterfaceClient
   })
   async startCurrentTask() {
     if (this.currentTask.getContent()) {
+
+      // We have to consinder, whether the job is allready active or not
+      if (this.taskActive.getContent()){
+        return true;
+      }
+
       return startTask(
         this._station,
         this.currentTask.getContent().id,
@@ -256,6 +276,10 @@ export class XeticsInterfaceClient
     if (this.currentTask.getContent()) {
       // Call the Finish-Task Operation. Use the parameters of the current Task.
       // Returns the sucess of the Operation.
+      if (this._logger){
+        this._logger.info("Finishing Task " + this.currentTask.getContent().id.toString());
+      }
+
       const finished = await finishTask(
         this._station,
         this.currentTask.getContent().id,
@@ -294,6 +318,8 @@ export class XeticsInterfaceClient
       await getTasksFromMES(this._station, true, this._uri, this._token)
     );
 
+    let _taskActive = false;
+    
     // Check if there exists a currently active Task
     // if so => assign this task
     const activeTasks = await getActiveTasksFromMES(
@@ -305,6 +331,7 @@ export class XeticsInterfaceClient
     if (activeTasks.length > 0) {
       // If there are multiple Tasks.
       this.currentTask.setContent(activeTasks[0]);
+      _taskActive = true;
     } else {
       // No active Tasks are present => use a task with the
       // current lot id.
@@ -318,6 +345,8 @@ export class XeticsInterfaceClient
       }
     }
 
+    this.taskActive.setContent(_taskActive);
+
     // Return the whether a task has been assigned.
     return (
       this.currentTask.getContent() !== undefined ||