org.opencastproject.inspection.remote.MediaInspectionServiceRemoteImpl.java Source code

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Here is the source code for org.opencastproject.inspection.remote.MediaInspectionServiceRemoteImpl.java

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/**
 *  Copyright 2009, 2010 The Regents of the University of California
 *  Licensed 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://www.osedu.org/licenses/ECL-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.opencastproject.inspection.remote;

import org.opencastproject.inspection.api.MediaInspectionException;
import org.opencastproject.inspection.api.MediaInspectionService;
import org.opencastproject.job.api.Job;
import org.opencastproject.job.api.JobParser;
import org.opencastproject.mediapackage.MediaPackageElement;
import org.opencastproject.mediapackage.MediaPackageElementParser;
import org.opencastproject.serviceregistry.api.RemoteBase;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.message.BasicNameValuePair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;

/**
 * Proxies a remote media inspection service for use as a JVM-local service.
 */
public class MediaInspectionServiceRemoteImpl extends RemoteBase implements MediaInspectionService {

    /** The logger */
    private static final Logger logger = LoggerFactory.getLogger(MediaInspectionServiceRemoteImpl.class);

    /**
     * Constructs a new remote media inspection service proxy
     */
    public MediaInspectionServiceRemoteImpl() {
        super(JOB_TYPE);
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.opencastproject.inspection.api.MediaInspectionService#inspect(java.net.URI)
     */
    @Override
    public Job inspect(URI uri) throws MediaInspectionException {
        List<NameValuePair> queryStringParams = new ArrayList<NameValuePair>();
        queryStringParams.add(new BasicNameValuePair("uri", uri.toString()));
        String url = "/inspect?" + URLEncodedUtils.format(queryStringParams, "UTF-8");
        logger.info("Inspecting media file at {} using a remote media inspection service", uri);
        HttpResponse response = null;
        try {
            HttpGet get = new HttpGet(url);
            response = getResponse(get);
            if (response != null) {
                Job job = JobParser.parseJob(response.getEntity().getContent());
                logger.info("Completing inspection of media file at {} using a remote media inspection service",
                        uri);
                return job;
            }
        } catch (Exception e) {
            throw new MediaInspectionException("Unable to inspect " + uri + " using a remote inspection service",
                    e);
        } finally {
            closeConnection(response);
        }
        throw new MediaInspectionException("Unable to inspect " + uri + " using a remote inspection service");
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.opencastproject.inspection.api.MediaInspectionService#enrich(org.opencastproject.mediapackage.AbstractMediaPackageElement,
     *      boolean)
     */
    @Override
    public Job enrich(MediaPackageElement original, boolean override) throws MediaInspectionException {
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        try {
            params.add(new BasicNameValuePair("mediaPackageElement", MediaPackageElementParser.getAsXml(original)));
            params.add(new BasicNameValuePair("override", new Boolean(override).toString()));
        } catch (Exception e) {
            throw new MediaInspectionException(e);
        }
        logger.info("Enriching {} using a remote media inspection service", original);
        HttpResponse response = null;
        try {
            HttpPost post = new HttpPost("/enrich");
            post.setEntity(new UrlEncodedFormEntity(params));
            response = getResponse(post);
            if (response != null) {
                Job receipt = JobParser.parseJob(response.getEntity().getContent());
                logger.info("Completing inspection of media file at {} using a remote media inspection service",
                        original.getURI());
                return receipt;
            }
        } catch (Exception e) {
            throw new MediaInspectionException(
                    "Unable to enrich " + original + " using a remote inspection service", e);
        } finally {
            closeConnection(response);
        }
        throw new MediaInspectionException("Unable to enrich " + original + " using a remote inspection service");
    }

}