org.opencastproject.textanalyzer.remote.TextAnalysisRemoteImpl.java Source code

Introduction

Here is the source code for org.opencastproject.textanalyzer.remote.TextAnalysisRemoteImpl.java

Source

/**
 *  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.textanalyzer.remote;

import org.opencastproject.job.api.Job;
import org.opencastproject.job.api.JobParser;
import org.opencastproject.mediapackage.Attachment;
import org.opencastproject.mediapackage.MediaPackageElementParser;
import org.opencastproject.serviceregistry.api.RemoteBase;
import org.opencastproject.textanalyzer.api.TextAnalyzerException;
import org.opencastproject.textanalyzer.api.TextAnalyzerService;

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.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;

public class TextAnalysisRemoteImpl extends RemoteBase implements TextAnalyzerService {

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

    public TextAnalysisRemoteImpl() {
        super(JOB_TYPE);
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.opencastproject.textanalyzer.api.TextAnalyzerService#extract(org.opencastproject.mediapackage.MediaPackageElement)
     */
    @Override
    public Job extract(final Attachment image) throws TextAnalyzerException {
        HttpPost post = new HttpPost();
        try {
            List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
            params.add(new BasicNameValuePair("image", MediaPackageElementParser.getAsXml(image)));
            post.setEntity(new UrlEncodedFormEntity(params));
        } catch (Exception e) {
            throw new TextAnalyzerException(e);
        }
        HttpResponse response = null;
        try {
            response = getResponse(post);
            if (response != null) {
                try {
                    Job receipt = JobParser.parseJob(response.getEntity().getContent());
                    logger.info("Analyzing {} on a remote analysis server", image);
                    return receipt;
                } catch (Exception e) {
                    throw new TextAnalyzerException(
                            "Unable to analyze element '" + image + "' using a remote analysis service", e);
                }
            }
        } finally {
            closeConnection(response);
        }
        throw new TextAnalyzerException(
                "Unable to analyze element '" + image + "' using a remote analysis service");
    }

}