public void setWalNode(final WALNode walNode, final long memTableId) {
    this.walNode = walNode;
    this.memTableId = memTableId;
    walEntryPosition.setWalNode(walNode, memTableId);
  }
Get this handler's value.

@throws WALPipeException when failing to get the value.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/wal/utils/WALEntryHandler.java