subprojects/s4-example/src/main/java/org/apache/s4/example/edsl/counter/GenerateUserEventPE.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.s4.example.edsl.counter;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import org.apache.s4.core.App;
import org.apache.s4.core.ProcessingElement;
import org.apache.s4.core.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class GenerateUserEventPE extends ProcessingElement {

    private static final Logger logger = LoggerFactory.getLogger(GenerateUserEventPE.class);

    static String userIds[] = { "pepe", "jose", "tito", "mr_smith", "joe" };
    static int[] ages = { 25, 2, 33, 6, 67 };
    static char[] genders = { 'f', 'm' };
    private Stream<UserEvent>[] targetStreams;
    final private Random generator = new Random(22);

    public GenerateUserEventPE(App app) {
        super(app);
    }

    /**
     * @param targetStreams
     *            the {@link UserEvent} streams.
     */
    public void setStreams(Stream<UserEvent>... targetStreams) {
        this.targetStreams = targetStreams;
    }

    protected void onTime() {
        List<String> favorites = new ArrayList<String>();
        favorites.add("dulce de leche");
        favorites.add("strawberry");

        int indexUserID = generator.nextInt(userIds.length);
        int indexAge = generator.nextInt(ages.length);
        int indexGender = generator.nextInt(2);

        UserEvent userEvent = new UserEvent(userIds[indexUserID], ages[indexAge], favorites, genders[indexGender]);
        logger.trace("Sending userID: [{}], age: [{}].", userIds[indexUserID], ages[indexAge]);
        emit(userEvent, targetStreams);
    }

    @Override
    protected void onRemove() {
    }

    static int pickRandom(int numElements) {
        return 0;
    }

    @Override
    protected void onCreate() {
        // TODO Auto-generated method stub

    }
}