Police said they arrested four people Tuesday who used a market in Jamaica Plain as a front for selling drugs. Jeancarlo Rodriguez, 30, of Jamaica Plain and Ansony Lapaix, 22, of Dorchester were arrested on charges of trafficking Class A drugs and possession with intent to distribute Class A drugs within 1,000 feet of a school zone, said police. Authorities said they seized more than one plastic bag of heroin, more than 45 grams of oxycodone pills, and more than $10,000 cash while executing a search warrant at D&R Supermarket at 180 Hyde Park Ave., police said. Dilency Liberato, 25, of Mattapan and Noelia Melendez, 25, of Dorchester were arrested on a charge of knowingly being in the company of a person in possession of heroin, authorities said. All four are expected back in court March 23.