Method addTask

fdbclient/DatabaseBackupAgent.actor.cpp:179–207

	}

	ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr,
	                                 Reference<TaskBucket> taskBucket,
	                                 Reference<Task> parentTask,
	                                 Key begin,
	                                 Key end,
	                                 TaskCompletionKey completionKey,
	                                 Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
		Key doneKey = wait(completionKey.get(tr, taskBucket));
		auto task = makeReference<Task>(BackupRangeTaskFunc::name, BackupRangeTaskFunc::version, doneKey);

		copyDefaultParameters(parentTask, task);

		task->params[BackupAgentBase::keyBeginKey] = begin;
		task->params[BackupAgentBase::keyEndKey] = end;

		if (!waitFor) {
			return taskBucket->addTask(tr,
			                           task,
			                           parentTask->params[Task::reservedTaskParamValidKey],
			                           task->params[BackupAgentBase::keyFolderId]);
		}

		wait(waitFor->onSetAddTask(tr,
		                           taskBucket,
		                           task,
		                           parentTask->params[Task::reservedTaskParamValidKey],
		                           task->params[BackupAgentBase::keyFolderId]));
		return LiteralStringRef("OnSetAddTask");
	}

	ACTOR static Future<Void> _execute(Database cx,
	                                   Reference<TaskBucket> taskBucket,