+ /**
+ * Sets safely the previous worker node key.
+ *
+ * @param workerNodeKey - The worker node key.
+ */
+ protected setPreviousWorkerNodeKey (workerNodeKey: number | undefined): void {
+ this.previousWorkerNodeKey = workerNodeKey ?? this.previousWorkerNodeKey
+ }
+
+ /**
+ * Check the next worker node eligibility.
+ *
+ * @param previousWorkerNodeKey - The previous worker node key.
+ */
+ protected checkNextWorkerNodeEligibility (
+ previousWorkerNodeKey: number | undefined
+ ): void {
+ if (!this.isWorkerNodeEligible(this.nextWorkerNodeKey as number)) {
+ this.nextWorkerNodeKey = undefined
+ this.setPreviousWorkerNodeKey(previousWorkerNodeKey)
+ }
+ }
+