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A cafe example showing how to work with Camel
There is a newer version: 2.19.5
/**
 * 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.camel.example.cafe.stuff;

import java.util.concurrent.atomic.AtomicInteger;

import org.apache.camel.example.cafe.Drink;
import org.apache.camel.example.cafe.OrderItem;

public class Barista {

    private long hotDrinkDelay = 300;

    private long coldDrinkDelay = 100;

    private AtomicInteger hotDrinkCounter = new AtomicInteger();

    private AtomicInteger coldDrinkCounter = new AtomicInteger();

    public void setHotDrinkDelay(long hotDrinkDelay) {
        this.hotDrinkDelay = hotDrinkDelay;
    }

    public void setColdDrinkDelay(long coldDrinkDelay) {
        this.coldDrinkDelay = coldDrinkDelay;
    }

    public Drink prepareHotDrink(OrderItem orderItem) {
        try {
            Thread.sleep(this.hotDrinkDelay);
            System.out.println(Thread.currentThread().getName() + " prepared hot drink #"
                               + hotDrinkCounter.incrementAndGet() + " for order #"
                               + orderItem.getOrder().getNumber() + ": " + orderItem);
            return new Drink(orderItem.getOrder().getNumber(), orderItem.getDrinkType(), orderItem.isIced(),
                             orderItem.getShots());
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return null;
        }
    }

    public Drink prepareColdDrink(OrderItem orderItem) {
        try {
            Thread.sleep(this.coldDrinkDelay);
            System.out.println(Thread.currentThread().getName() + " prepared cold drink #"
                               + coldDrinkCounter.incrementAndGet() + " for order #"
                               + orderItem.getOrder().getNumber() + ": " + orderItem);
            return new Drink(orderItem.getOrder().getNumber(), orderItem.getDrinkType(), orderItem.isIced(),
                             orderItem.getShots());
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return null;
        }
    }

}