Enforcement action of the commission against EU member states

with reference to treaty articles , decided cases and the judicial process, what enforcement action the commission may take against a member of state which is in breach of its EU law obligations, and explain what further action may be taken by the commission against a member of state which fails to comply with an initial judgement of the court of Justice of the European Union rendered under Article 258 TFEU. In your answer give an appraisal of the effectiveness of the EU enforcement process. finally the referencing must contain The Law of European Union by John Fairhurst