基于使用Mahout的产品视图历史记录的建议

I am working on an E-Commerce website. I want to create a recommender based on user's product view history using Apache Mahout. Right now, I am able to generate recommendations based on rating data that user provides. Right now, the input to the recommender is user_id, item_id and ratings. I want to create a recommender which generates recommendations based on the products viewed by the user. Can anyone tell me how this can be achieved?I am working on an E-Commerce website. I want t