dk.nsi.minlog.export.dao.splunk.LogEntrySearchDaoSplunk.java Source code

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Here is the source code for dk.nsi.minlog.export.dao.splunk.LogEntrySearchDaoSplunk.java

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/**
 * The MIT License
 *
 * Original work sponsored and donated by National Board of e-Health (NSI), Denmark (http://www.nsi.dk)
 *
 * Copyright (C) 2011 National Board of e-Health (NSI), Denmark (http://www.nsi.dk)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package dk.nsi.minlog.export.dao.splunk;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import javax.inject.Inject;

import org.apache.log4j.Logger;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Repository;

import com.splunk.Job;
import com.splunk.ResultsReader;
import com.splunk.ResultsReaderXml;
import com.splunk.Service;

import dk.nsi.minlog.domain.LogEntry;
import dk.nsi.minlog.export.dao.LogEntrySearchDao;

@Repository
public class LogEntrySearchDaoSplunk implements LogEntrySearchDao {
    static final Logger logger = Logger.getLogger(LogEntrySearchDaoSplunk.class);

    @Value("${minlog.import.sleep}")
    public Integer sleep;

    @Inject
    SplunkServiceFactory splunkServiceFactory;

    @Value("${minlog.splunk.query}")
    String query;

    Map<String, String> resultOptions;
    static final String FIELDS = "_indextime, _time, EventDateTime, PersonCivilRegistrationIdentifier, UserIdentifier, UserIdentifierOnBehalfOf, HealthcareProfessionalOrganization, SourceSystemIdentifier, Activity, SessionId";

    public LogEntrySearchDaoSplunk() {
        resultOptions = new HashMap<String, String>();
        resultOptions.put("field_list", FIELDS);
    }

    @Override
    public List<LogEntry> findLogEntries(DateTime from, DateTime to) {
        // Format: "search index=main sourcetype=minlog  (_indextime > %d AND _indextime < %d) | fields %s | sort by _indextime asc";
        String finalQuery = String.format(query, (from.getMillis() / 1000), (to.getMillis() / 1000), FIELDS);

        logger.debug("Splunk query:" + finalQuery);

        Service service;

        try {
            service = splunkServiceFactory.getService();
        } catch (Exception exception) {
            throw new RuntimeException("Failed to connect to splunk server");
        }

        Job job = service.getJobs().create(finalQuery);

        //Wait for splunk query to complete
        logger.debug("Waiting for splunk to complete job");
        while (!job.isDone()) {
            logger.trace("Busy spinning...");
            try {
                Thread.sleep(sleep);
            } catch (Exception e) {
                Thread.currentThread().interrupt();
            }

            job.refresh();

            if (logger.isDebugEnabled()) {
                logger.debug("Checking job: " + (job.getDoneProgress() * 100.0f) + "% done");
            }
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Done waiting for splunk, result size:" + job.getResultCount());
        }

        List<LogEntry> result = new ArrayList<LogEntry>();

        InputStream stream = job.getResults(resultOptions);

        try {
            ResultsReader resultsReader = new ResultsReaderXml(stream);
            try {
                Map<String, String> resultMap;
                while ((resultMap = resultsReader.getNextEvent()) != null) {
                    result.add(transformMapToEntity(resultMap));
                }
            } finally {
                resultsReader.close();
            }
            //api for ResultsReaderXml is a bit ugly, it throws Exception
        } catch (Exception e) {
            logger.error("Failed to transform xml to entity", e);
            throw new RuntimeException("Failed to transform xml to entity from splunk");
        } finally {
            try {
                stream.close();
            } catch (IOException e) {
                logger.error("Failed to close stream", e);
            }
        }

        return result;
    }

    private static LogEntry transformMapToEntity(final Map<String, String> map) {
        if (logger.isTraceEnabled()) {
            logger.trace("Mapping to entity: \n" + map);
        }
        LogEntry logEntry = new LogEntry();

        logEntry.setRegKode(UUID.randomUUID().toString());
        logEntry.setTidspunkt(DateTime.parse(map.get("EventDateTime")));
        logEntry.setCprNrBorger(map.get("PersonCivilRegistrationIdentifier"));
        logEntry.setBruger(map.get("UserIdentifier"));
        logEntry.setAnsvarlig(map.get("UserIdentifierOnBehalfOf"));
        logEntry.setOrgUsingID(map.get("HealthcareProfessionalOrganization"));
        logEntry.setSystemName(map.get("SourceSystemIdentifier"));
        logEntry.setHandling(map.get("Activity"));
        logEntry.setSessionId(map.get("SessionId"));

        //Notice splunk return in seconds since epoch, datetime uses millis.
        long indexTime = Long.parseLong(map.get("_indextime")) * 1000;
        logEntry.setLastUpdated(new DateTime(indexTime));
        return logEntry;
    }
}