Dismissal of actions

(1) On Court's Own Motion. The court may on notice as hereinafter provided at any time, in its discretion, dismiss for lack of prosecution any action which has remained upon the docket for three years preceding said notice without activity shown other than placing upon the trial list, marking for trial, being set down for trial, the filing or withdrawal of an appearance, or the filing of any paper pertaining to discovery. The notice shall state that the action will be dismissed on a day certain, (not less than one year from the date of the notice) unless before that day the case has been tried, heard on the merits, otherwise disposed of, or unless the court on motion with or without notice shall otherwise order. The notice shall be mailed to the plaintiff's attorney of record, or, if there be none, to the plaintiff if his address be known. Otherwise such notice shall be published as directed by the court. Dismissal under this paragraph shall be without prejudice. (2) On Motion of the Defendant. On motion of the defendant, with notice, the court may, in its discretion, dismiss any action for failure of the plaintiff to prosecute or to comply with these rules or any order of court. After the plaintiff, in an action tried by the court without a jury, has completed the presentation of his evidence, the defendant, without waiving his right to offer evidence in the event the motion is not granted, may move for a dismissal on the ground that upon the facts and the law the plaintiff has shown no right to relief. The court as trier of the facts may then determine them and render judgment against the plaintiff or may decline to render any judgment until the close of all the evidence. If the court renders judgment on the merits against the plaintiff the court shall make findings as provided in Rule 52(a). (3) Effect. Unless the dismissal is pursuant to paragraph (1) of this subdivision (b), or unless the court in its order for dismissal otherwise specifies, a dismissal under this subdivision (b) and any dismissal not provided for in this rule, other than a dismissal for lack of jurisdiction, for improper venue, or for failure to join a party under Rule 19 , operates as an adjudication upon the merits. Identical to Mass.R.Civ.P. 41(b)