IFTTT.java

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import lombok.Data;
import org.codehaus.jackson.map.ObjectMapper;
import javax.ws.rs.core.MediaType;
import java.io.IOException;

/**
 * A easy to use class to facilitate calling the IFTTT Maker API (https://ifttt.com/maker) to trigger IFTTT recipes.
 * Requires Jersey and Jackson (I implemented this with versions 2.22.1 and 1.9.13 respectively)
 * @author Fergal Hanley - [email protected] (http://fergalhanley.com)
 */
public class IFTTT {

	private static final String IFTTT_TRIGGER_ENDPOINT = "https://maker.ifttt.com/trigger/%s/with/key/%s";

	/**
	 * Trigger the IFTTT API.
	 * More details at https://maker.ifttt.com/use/<your api key here>
	 * @param event The unique event identifier you setup for the trigger
	 * @param key The app key generated by IFTTT
	 * @param values Up to three values you can pass to the API request
	 */
	public void trigger(String event, String key, Object ...values){
		Client client = Client.create();
		String resourceUrl = String.format(IFTTT_TRIGGER_ENDPOINT, event, key);
		WebResource webResource = client.resource(resourceUrl);
		IftttReq iftttReq = new IftttReq(values);
		webResource.type(MediaType.APPLICATION_JSON).post(iftttReq.toJson());
	}

	@Data private class IftttReq {
		private final String value1;
		private final String value2;
		private final String value3;

		public IftttReq(Object... values) {
			this.value1 = values.length > 0 ? String.valueOf(values[0]) : null;
			this.value2 = values.length > 1 ? String.valueOf(values[1]) : null;
			this.value3 = values.length > 2 ? String.valueOf(values[2]) : null;
		}

		public String toJson(){
			ObjectMapper mapper = new ObjectMapper();
			try {
				return mapper.writeValueAsString(this);
			} catch (IOException e) {
				e.printStackTrace();
				return null;
			}
		}
	}
}

IFTTT_Test.java

import org.junit.Test;

/**
 * Test usage example. This call could do something like trigger IFTTT when a new premium user signs up
 * which in turn you could use to send a notification to you mobile, send a welcome email, tweet, etc.
 */
public class IFTTT_Test {

	@Test
	public void notifyNewUser(){
	  
	  final int PAYMENT_PLAN_TIER = 5;
	  final int NUMBER_OF_USERS_NOW = 1234;
	  
	  final String event = "new_user_signup";
	  final String key = "b2QVdqYs3PXo6aL7OyLgKb"; // your own key here
	  final String myValue1 = "[email protected]";
	  final String myValue2 = PAYMENT_PLAN_TIER;
	  final String myValue3 = NUMBER_OF_USERS_NOW;
	  
		new IFTTT().trigger(event, key, myValue1, myValue2, myValue3);
		
	}
}