examples/resume-api/resume-api-fileset/src/main/java/org/apache/camel/example/resume/fileset/main/MainApp.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.camel.example.resume.fileset.main;

import java.io.File;

import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.example.resume.clients.kafka.DefaultConsumerPropertyFactory;
import org.apache.camel.example.resume.clients.kafka.DefaultProducerPropertyFactory;
import org.apache.camel.example.resume.clients.kafka.FileDeserializer;
import org.apache.camel.example.resume.clients.kafka.FileSerializer;
import org.apache.camel.example.resume.strategies.kafka.fileset.KafkaFileSetResumeStrategy;
import org.apache.camel.example.resume.strategies.kafka.fileset.LargeDirectoryRouteBuilder;
import org.apache.camel.example.resume.strategies.kafka.fileset.MultiItemCache;
import org.apache.camel.main.Main;

/**
 * A Camel Application
 */
public class MainApp {

    /**
     * A main() so we can easily run these routing rules in our IDE
     */
    public static void main(String... args) throws Exception {
        Main main = new Main();

        KafkaFileSetResumeStrategy resumeStrategy = getUpdatableConsumerResumeStrategyForSet();
        RouteBuilder routeBuilder = new LargeDirectoryRouteBuilder(resumeStrategy);

        main.configure().addRoutesBuilder(routeBuilder);
        main.run(args);
    }

    private static KafkaFileSetResumeStrategy getUpdatableConsumerResumeStrategyForSet() {
        String bootStrapAddress = System.getProperty("bootstrap.address", "localhost:9092");
        String kafkaTopic = System.getProperty("resume.type.kafka.topic", "offsets");

        final DefaultConsumerPropertyFactory consumerPropertyFactory = new DefaultConsumerPropertyFactory(bootStrapAddress);

        consumerPropertyFactory.setKeyDeserializer(FileDeserializer.class.getName());
        consumerPropertyFactory.setValueDeserializer(FileDeserializer.class.getName());
        consumerPropertyFactory.setOffsetReset("earliest");

        final DefaultProducerPropertyFactory producerPropertyFactory = new DefaultProducerPropertyFactory(bootStrapAddress);

        producerPropertyFactory.setKeySerializer(FileSerializer.class.getName());
        producerPropertyFactory.setValueSerializer(FileSerializer.class.getName());

        MultiItemCache<File, File> cache = new MultiItemCache<>();

        return new KafkaFileSetResumeStrategy(kafkaTopic, cache, producerPropertyFactory, consumerPropertyFactory);
    }

}