org.onebusaway.nyc.integration_tests.vehicle_tracking_webapp.TraceSupport.java Source code

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Here is the source code for org.onebusaway.nyc.integration_tests.vehicle_tracking_webapp.TraceSupport.java

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/**
 * Copyright (c) 2011 Metropolitan Transportation Authority
 *
 * 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.
 */
package org.onebusaway.nyc.integration_tests.vehicle_tracking_webapp;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPInputStream;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.multipart.ByteArrayPartSource;
import org.apache.commons.httpclient.methods.multipart.FilePart;
import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
import org.apache.commons.httpclient.methods.multipart.Part;
import org.apache.commons.httpclient.methods.multipart.StringPart;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.onebusaway.gtfs.csv.CsvEntityReader;
import org.onebusaway.gtfs.csv.CsvEntityWriterFactory;
import org.onebusaway.gtfs.csv.EntityHandler;
import org.onebusaway.nyc.vehicle_tracking.model.NycTestLocationRecord;

public class TraceSupport {

    private boolean shiftStartTime;

    public String uploadTraceForSimulation(File path) throws IOException {
        return uploadTraceForSimulation(path.getName(), new FileInputStream(path));
    }

    public String uploadTraceForSimulation(String fileName, InputStream in) throws IOException {

        try {
            HttpClient client = new HttpClient();
            String url = url("/vehicle-location-simulation!upload-trace.do");
            PostMethod post = new PostMethod(url);

            ByteArrayPartSource source = getResourceAsPartSource(fileName, in);
            FilePart filePart = new FilePart("file", source);
            StringPart returnIdParam = new StringPart("returnId", "true");
            StringPart shiftStartTimeParam = new StringPart("shiftStartTime", "" + shiftStartTime);
            StringPart traceTypeParam = new StringPart("traceType", "NycTestLocationRecord");

            post.setRequestEntity(new MultipartRequestEntity(
                    new Part[] { filePart, returnIdParam, shiftStartTimeParam, traceTypeParam },
                    new HttpMethodParams()));
            client.executeMethod(post);

            return post.getResponseBodyAsString();

        } catch (HttpException ex) {
            throw new IllegalStateException(ex);
        }

    }

    private String url(String path) {

        String port = System.getProperty("org.onebusaway.transit_data_federation_webapp.port", "9905");

        return "http://localhost:" + port + "/onebusaway-nyc-vehicle-tracking-webapp" + path;
    }

    public List<NycTestLocationRecord> getSimulationResults(String taskId) throws IOException {
        try {
            URL url = new URL(url("/vehicle-location-simulation!task-result-records.do?taskId=" + taskId));
            InputStream in = url.openStream();
            return readRecords(in);
        } catch (MalformedURLException ex) {
            throw new IllegalStateException(ex);
        }
    }

    public List<NycTestLocationRecord> readRecords(File trace) throws IOException {
        InputStream is = new FileInputStream(trace);
        if (trace.getName().endsWith(".gz"))
            is = new GZIPInputStream(is);
        return readRecords(is);
    }

    public String getRecordsAsString(List<NycTestLocationRecord> actual) {
        CsvEntityWriterFactory factory = new CsvEntityWriterFactory();
        StringWriter out = new StringWriter();
        EntityHandler handler = factory.createWriter(NycTestLocationRecord.class, out);
        for (NycTestLocationRecord record : actual)
            handler.handleEntity(record);
        return out.toString();
    }

    /****
     * 
     ****/

    private ByteArrayPartSource getResourceAsPartSource(String fileName, InputStream in) throws IOException {

        ByteArrayOutputStream out = new ByteArrayOutputStream();

        byte[] buffer = new byte[1024];

        while (true) {
            int rc = in.read(buffer);
            if (rc < 0)
                break;
            out.write(buffer, 0, rc);
        }

        in.close();
        return new ByteArrayPartSource(fileName, out.toByteArray());
    }

    private static class EntityCollector<T> implements EntityHandler {

        private List<T> _values = new ArrayList<T>();

        public List<T> getValues() {
            return _values;
        }

        @SuppressWarnings("unchecked")
        @Override
        public void handleEntity(Object bean) {
            _values.add((T) bean);
        }
    }

    private List<NycTestLocationRecord> readRecords(InputStream in) throws IOException {
        CsvEntityReader reader = new CsvEntityReader();
        EntityCollector<NycTestLocationRecord> records = new EntityCollector<NycTestLocationRecord>();
        reader.addEntityHandler(records);
        reader.readEntities(NycTestLocationRecord.class, in);
        return records.getValues();
    }

    public void setShiftStartTime(boolean shiftStartTime) {
        this.shiftStartTime = shiftStartTime;
    }

    public boolean getShiftStartTime() {
        return shiftStartTime;
    }

}