private LuceneQuery GetApplicationsMltQuery(MoreLikeThis mlt, IEnumerable <Guid> jobAdIds)
{
var jobAds = _jobAdsQuery.GetJobAds <JobAd>(jobAdIds);
var applicationsString = new StringBuilder();
foreach (var jobAd in jobAds)
{
applicationsString.AppendLine(jobAd.Title)
.AppendLine(jobAd.Description.BulletPoints == null ? string.Empty : jobAd.Description.BulletPoints.ToString())
.AppendLine(jobAd.Description.Content);
}
return(mlt.like(new StringReader(applicationsString.ToString())));
}
private static LuceneQuery GetCandidateMltQuery(MoreLikeThis mlt, ICandidate candidate, Resume resume, string method)
{
var candidateString = new StringBuilder();
if (resume.Jobs != null)
{
// construct a stream of relevant job data for passing to mlt
foreach (var job in resume.Jobs.Take(5))
{
candidateString.AppendLine(job.Description).AppendLine(job.Title);
}
}
#region Log
if (EventSource.IsEnabled(Event.Trace))
{
EventSource.Raise(Event.Trace, method, "Building MLT Query #1", Event.Arg("Analysis Text", candidateString.ToString()));
}
#endregion
// add additional relevant resume data
candidateString.AppendLine(candidate.DesiredJobTitle);
candidateString.AppendLine(resume.Summary).AppendLine(resume.Skills);
if (candidateString.Length < 1000)
{
#region Log
if (EventSource.IsEnabled(Event.Trace))
{
EventSource.Raise(Event.Trace, method, "MLT Query aborted - insufficient text for analysis", Event.Arg("Analysis Text", candidateString.ToString()));
}
#endregion
return(null);
}
#region Log
if (EventSource.IsEnabled(Event.Trace))
{
EventSource.Raise(Event.Trace, method, "Building MLT Query #2", Event.Arg("Analysis Text", candidateString.ToString()));
}
#endregion
return(mlt.like(new StringReader(candidateString.ToString())));
}
JobAdSearchResults IJobAdSearchService.SearchSimilar(Guid?memberId, Guid jobAdId, JobAdSearchQuery searchQuery)
{
const string method = "GetSimilarJobs";
try
{
var reader = GetReader();
var searcher = new Searcher(reader);
var docId = searcher.Fetch(jobAdId);
// If the job ad cannot be found then return no results.
if (docId == -1)
{
return(new JobAdSearchResults());
}
var jobAd = _jobAdsQuery.GetJobAd <JobAd>(jobAdId);
if (jobAd == null)
{
return(new JobAdSearchResults());
}
// Look for more like this.
var mlt = new MoreLikeThis(reader);
mlt.setAnalyzer(_contentAnalyzer);
mlt.setFieldNames(new [] { FieldName.Content, FieldName.Title });
var query = mlt.like(docId);
//query = new SeniorityIndexHandler().GetQuery(query, new JobAdSearchQuery {SeniorityIndex = jobAd.SeniorityIndex});
// Ensure the initial job is not in the results.
var searchFilter = new BooleanFilter();
searchFilter.add(new FilterClause(new SpecialsFilter(SearchFieldName.Id, false, new[] { jobAdId.ToFieldValue() }), BooleanClause.Occur.MUST_NOT));
// Add salary and location restriction.
var filter = _indexer.GetFilter(
new JobAdSearchQuery
{
Salary = FudgeSalary(jobAd.Description.Salary),
ExcludeNoSalary = true,
Location = jobAd.Description.Location,
Distance = 50,
},
null,
null);
searchFilter.add(new FilterClause(filter, BooleanClause.Occur.MUST));
return(searcher.Search(query, searchFilter, null, null, searchQuery.Skip, searchQuery.Take ?? reader.maxDoc(), false));
}
catch (Exception e)
{
#region Log
EventSource.Raise(Event.Error, method, "Unexpected exception.", e);
#endregion
throw;
}
}