org.opencastproject.silencedetection.remote.SilenceDetectionServiceRemote.java Source code

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Here is the source code for org.opencastproject.silencedetection.remote.SilenceDetectionServiceRemote.java

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/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.silencedetection.remote;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.opencastproject.job.api.Job;
import org.opencastproject.job.api.JobParser;
import org.opencastproject.mediapackage.MediaPackageElementParser;
import org.opencastproject.mediapackage.Track;
import org.opencastproject.serviceregistry.api.RemoteBase;
import org.opencastproject.silencedetection.api.SilenceDetectionFailedException;
import org.opencastproject.silencedetection.api.SilenceDetectionService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Silence dedection service proxy for use as a JVM local service.
 */
public class SilenceDetectionServiceRemote extends RemoteBase implements SilenceDetectionService {

    private static final Logger logger = LoggerFactory.getLogger(SilenceDetectionServiceRemote.class);

    public SilenceDetectionServiceRemote() {
        super(JOB_TYPE);
    }

    @Override
    public Job detect(Track sourceTrack) throws SilenceDetectionFailedException {
        return detect(sourceTrack, null);
    }

    @Override
    public Job detect(Track sourceTrack, Track[] referencedTracks) throws SilenceDetectionFailedException {
        HttpPost post = new HttpPost("/detect");
        List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
        try {
            params.add(new BasicNameValuePair("track", MediaPackageElementParser.getAsXml(sourceTrack)));
            if (referencedTracks != null && referencedTracks.length > 0) {
                String referencedTracksXml = MediaPackageElementParser
                        .getArrayAsXml(Arrays.asList(referencedTracks));
                params.add(new BasicNameValuePair("referenceTracks", referencedTracksXml));
            }
            post.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
        } catch (Exception e) {
            throw new SilenceDetectionFailedException(
                    "Unable to assemble a remote silence detection request for track "
                            + sourceTrack.getIdentifier());
        }

        HttpResponse response = null;
        try {
            response = getResponse(post);
            if (response != null) {
                String entity = EntityUtils.toString(response.getEntity());
                if (StringUtils.isNotEmpty(entity)) {
                    Job resultJob = JobParser.parseJob(entity);
                    logger.info("Start silence detection for track '{}' on remote silence detection service",
                            sourceTrack.getIdentifier());
                    return resultJob;
                }
            }
        } catch (Exception e) {
            throw new SilenceDetectionFailedException("Unable to run silence detection for track "
                    + sourceTrack.getIdentifier() + " on remote silence detection service", e);
        } finally {
            closeConnection(response);
        }
        throw new SilenceDetectionFailedException("Unable to run silence detection for track "
                + sourceTrack.getIdentifier() + " on remote silence detection service");
    }
}