StreamServiceEventProducer.java

/*
 Copyright 1995-2015 Esri

 Licensed 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.

 For additional information, contact:
 Environmental Systems Research Institute, Inc.
 Attn: Contracts Dept
 380 New York Street
 Redlands, California, USA 92373

 email: contracts@esri.com
 */
package com.esri.geoevent.test.performance.streamservice;

import java.io.IOException;
import java.net.URI;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.eclipse.jetty.websocket.WebSocketClient;
import org.eclipse.jetty.websocket.WebSocketClientFactory;

import com.esri.geoevent.test.performance.FileType;
import com.esri.geoevent.test.performance.ImplMessages;
import com.esri.geoevent.test.performance.ProducerBase;
import com.esri.geoevent.test.performance.TestException;
import com.esri.geoevent.test.performance.jaxb.Config;
import com.esri.geoevent.test.performance.websocket.WebsocketConnection;

public class StreamServiceEventProducer extends ProducerBase {

    private static final String BROADCAST = "/broadcast";

    private WebsocketConnection[] connections;
    private String url;
    private WebSocketClientFactory factory;
    private WebSocketClient client;
    private int connectionCount;
    private StreamMetadata metaData;

    @Override
    public void init(Config config) throws TestException {
        super.init(config);

        try {
            if (factory == null) {
                factory = new WebSocketClientFactory();
                factory.start();
            }

            if (client == null) {
                client = factory.newWebSocketClient();
                client.setMaxIdleTime(30000);
                client.setProtocol("input");
            }

            connectionCount = Integer.parseInt(config.getPropertyValue("connectionCount", "1"));
            url = config.getPropertyValue("url");

            String serviceMetadataUrl = url + "?f=json";
            metaData = new StreamMetadata(serviceMetadataUrl);
            List<String> wsUrls = metaData.gerUrls();

            connections = new WebsocketConnection[connectionCount];
            for (int i = 0; i < connectionCount; i++) {
                String wsUrl = wsUrls.get(i % wsUrls.size()) + BROADCAST;
                URI uri = new URI(wsUrl);
                connections[i] = new WebsocketConnection();
                connections[i].setConnection(client.open(uri, connections[i], 10, TimeUnit.SECONDS));
            }
        } catch (Throwable error) {
            throw new TestException(ImplMessages.getMessage("INIT_FAILURE", getClass().getName(), error.getMessage()), error);
        }
    }

    @Override
    public void validate() throws TestException {
        super.validate();

        // validate the event file is of type feature json
        if (getEventFileType() != FileType.JSON) {
            throw new TestException(ImplMessages.getMessage("INVALID_SIMULATION_FILE_TYPE", getSimulationFile(), FileType.JSON.name().toLowerCase()));
        }

        for (WebsocketConnection connection : connections) {
            connection.validate();
        }
    }

    @Override
    public int sendEvents(int index, int numEventsToSend) {
        int eventIndex = index;
        for (int i = 0; i < numEventsToSend; i++) {
            if (eventIndex == events.size()) {
                eventIndex = 0;
            }
            try {
                String message = augmentMessage(events.get(eventIndex++));
                for (WebsocketConnection connection : connections) {
                    connection.send(message);
                }
                messageSent(message);
                if (running.get() == false) {
                    break;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return eventIndex;
    }

    @Override
    public void destroy() {
        super.destroy();

        for (WebsocketConnection connection : connections) {
            connection.close();
        }

        try {
            factory.stop();
        } catch (Exception e) {
            e.printStackTrace();
        }

        factory.destroy();
        factory = null;
        client = null;
        connections = null;
    }
}