First draft of the waiting solution

src/main/java/org/activeeon/morphemic/PAGateway.java

@@ -789,13 +789,23 @@ public class PAGateway {
 
             tasksTokens.forEach(taskToken -> {
                 String suffix = "_" + tasksTokens.indexOf(taskToken);
-                scriptTasks.addAll(createAppTasks(task, suffix, taskToken));
+                scriptTasks.addAll(0, createAppTasks(task, suffix, taskToken));
+
+                scriptTasks.add(0, createLockHandlerTask(task.getName(), suffix, taskToken));
+                scriptTasks.get(1).addDependence(scriptTasks.get(0));
             });
         }
 
         return scriptTasks;
     }
 
+    private ScriptTask createLockHandlerTask(String taskName, String suffix, String taskToken) {
+        String lockTaskName = "waitForLock_" + taskName + suffix;
+        ScriptTask lockHandlerTask = PAFactory.createBashScriptTaskFromFile(lockTaskName, "wait_for_lock_script.sh");
+        lockHandlerTask.addGenericInformation("NODE_ACCESS_TOKEN", taskToken);
+        return lockHandlerTask;
+    }
+
     private void setAllMandatoryDependencies(TaskFlowJob paJob, Job jobToSubmit) {
         jobToSubmit.getTasks().forEach(task -> {
             if (task.getParentTasks() != null && !task.getParentTasks().isEmpty()) {

src/main/resources/wait_for_lock_script.sh

+i=0
+while [ `ps aux | grep [l]ock_is_held | wc -l` != 0 ]; do
+	echo "Lock_is_held $i"
+	ps aux | grep [l]ock_is_held
+	sleep 10
+	((i=i+10));
+done
+echo "Exited the while loop, time spent: $i"
+ps aux | grep [a]pt
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