org.apache.streams.datasift.example.DatasiftPushApplication.java Source code

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Here is the source code for org.apache.streams.datasift.example.DatasiftPushApplication.java

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/*
 * 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
 *
 *   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.streams.datasift.example;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.guava.GuavaModule;
import com.fasterxml.jackson.module.afterburner.AfterburnerModule;
import com.google.common.collect.Maps;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import com.typesafe.config.ConfigRenderOptions;
import io.dropwizard.Application;
import io.dropwizard.jackson.GuavaExtrasModule;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
import org.apache.streams.config.StreamsConfigurator;
import org.apache.streams.core.StreamBuilder;
import org.apache.streams.datasift.processor.DatasiftActivitySerializerProcessor;
import org.apache.streams.datasift.provider.DatasiftPushProvider;
import org.apache.streams.datasift.util.StreamsDatasiftMapper;
import org.apache.streams.elasticsearch.ElasticsearchPersistWriter;
import org.apache.streams.converter.CleanAdditionalPropertiesProcessor;
import org.apache.streams.kafka.KafkaPersistReader;
import org.apache.streams.kafka.KafkaPersistWriter;
import org.apache.streams.local.builders.LocalStreamBuilder;
import org.apache.streams.pojo.json.Activity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;

public class DatasiftPushApplication extends Application<StreamsApiConfiguration> {

    private static final Logger LOGGER = LoggerFactory.getLogger(DatasiftPushApplication.class);

    private static ObjectMapper mapper = StreamsDatasiftMapper.getInstance();

    private StreamBuilder builder;

    private DatasiftPushProvider provider;
    private KafkaPersistWriter kafkaWriter;
    private KafkaPersistReader kafkaReader;
    private ElasticsearchPersistWriter writer;

    private Executor executor = Executors.newSingleThreadExecutor();

    private DatasiftWebhookResource webhooks;

    static {
        mapper.registerModule(new AfterburnerModule());
        mapper.registerModule(new GuavaModule());
        mapper.registerModule(new GuavaExtrasModule());
    }

    @Override
    public void initialize(Bootstrap<StreamsApiConfiguration> bootstrap) {

        LOGGER.info(getClass().getPackage().getName());

    }

    @Override
    public void run(StreamsApiConfiguration streamsApiConfiguration, Environment environment) throws Exception {

        // streamsApiConfiguration = reconfigure(streamsApiConfiguration);
        provider = new DatasiftWebhookResource();
        kafkaWriter = new KafkaPersistWriter(streamsApiConfiguration.getKafka());
        kafkaReader = new KafkaPersistReader(streamsApiConfiguration.getKafka());
        writer = new ElasticsearchPersistWriter(streamsApiConfiguration.getElasticsearch());

        executor = Executors.newSingleThreadExecutor();

        executor.execute(new StreamsLocalRunner());

        Thread.sleep(10000);

        environment.jersey().register(provider);

    }

    private class StreamsLocalRunner implements Runnable {

        @Override
        public void run() {

            Map<String, Object> streamConfig = Maps.newHashMap();
            streamConfig.put(LocalStreamBuilder.TIMEOUT_KEY, 20 * 60 * 1000 * 1000);

            builder = new LocalStreamBuilder(1000, streamConfig);

            // prepare stream components
            builder.newPerpetualStream("webhooks", provider);
            builder.addStreamsPersistWriter("kafkaWriter", kafkaWriter, 1, "webhooks");
            builder.newPerpetualStream("kafkaReader", kafkaReader);
            builder.addStreamsProcessor("converter", new DatasiftActivitySerializerProcessor(Activity.class), 2,
                    "kafkaReader");
            builder.addStreamsProcessor("RemoveAdditionalProperties", new CleanAdditionalPropertiesProcessor(), 2,
                    "converter");
            builder.addStreamsPersistWriter(ElasticsearchPersistWriter.STREAMS_ID, writer, 1,
                    "RemoveAdditionalProperties");

            builder.start();

        }
    }

    private StreamsApiConfiguration reconfigure(StreamsApiConfiguration streamsApiConfiguration) {

        // config from typesafe
        Config configTypesafe = StreamsConfigurator.config;

        // config from dropwizard
        Config configDropwizard = null;
        try {
            configDropwizard = ConfigFactory.parseString(mapper.writeValueAsString(streamsApiConfiguration));
        } catch (JsonProcessingException e) {
            e.printStackTrace();
            LOGGER.error("Invalid Configuration: " + streamsApiConfiguration);
        }

        Config combinedConfig = configTypesafe.withFallback(configDropwizard);
        String combinedConfigJson = combinedConfig.root().render(ConfigRenderOptions.concise());

        StreamsApiConfiguration combinedDropwizardConfig = null;
        try {
            combinedDropwizardConfig = mapper.readValue(combinedConfigJson, StreamsApiConfiguration.class);
        } catch (IOException e) {
            e.printStackTrace();
            LOGGER.error("Invalid Configuration after merge: " + streamsApiConfiguration);
        }

        return combinedDropwizardConfig;

    }

    public static void main(String[] args) throws Exception {

        new DatasiftPushApplication().run(args);

    }
}