public async Task <IReadOnlyCollection <ObjectMetadataRecord> > GetObjectMetadatas(IReadOnlyCollection <long> ids)
{
var uniqueIds = new HashSet <long>(ids);
var partitioner = Partitioner.Create(uniqueIds);
var result = new ObjectMetadataRecord[uniqueIds.Count];
var tasks = partitioner
.GetOrderablePartitions(_degreeOfParallelism)
.Select(async x =>
{
while (x.MoveNext())
{
var id = x.Current.Value;
ObjectMetadataRecord record;
try
{
var objectVersions = await GetObjectLatestVersions(id);
var versionId = objectVersions.Where(v => v.Id.EndsWith(Tokens.ObjectPostfix))
.Select(v => v.VersionId)
.SingleOrDefault();
if (versionId == null)
{
record = null;
}
else
{
var response = await _s3Client.GetObjectMetadataAsync(_bucketName, id.AsS3ObjectKey(Tokens.ObjectPostfix), versionId);
var metadataWrapper = MetadataCollectionWrapper.For(response.Metadata);
var author = metadataWrapper.Read <string>(MetadataElement.Author);
var authorLogin = metadataWrapper.Read <string>(MetadataElement.AuthorLogin);
var authorName = metadataWrapper.Read <string>(MetadataElement.AuthorName);
record = new ObjectMetadataRecord(
id,
versionId,
response.LastModified,
new AuthorInfo(author, authorLogin, authorName));
}
}
catch (AmazonS3Exception ex) when(ex.StatusCode == HttpStatusCode.NotFound)
{
record = null;
}
result[x.Current.Key] = record;
}
});
await Task.WhenAll(tasks);
return(result.Where(x => x != null).ToList());
}
public async Task <IReadOnlyCollection <ObjectMetadataRecord> > GetTemplateMetadatas(IReadOnlyCollection <long> ids)
{
var uniqueIds = new HashSet <long>(ids);
var partitioner = Partitioner.Create(uniqueIds);
var result = new ObjectMetadataRecord[uniqueIds.Count];
var tasks = partitioner
.GetOrderablePartitions(_degreeOfParallelism)
.Select(async x =>
{
while (x.MoveNext())
{
var templateId = x.Current.Value;
ObjectMetadataRecord record;
try
{
var versionId = await GetTemplateLatestVersion(templateId);
var response = await _s3Client.GetObjectMetadataAsync(_bucketName, templateId.ToString(), versionId);
var metadataWrapper = MetadataCollectionWrapper.For(response.Metadata);
var author = metadataWrapper.Read <string>(MetadataElement.Author);
var authorLogin = metadataWrapper.Read <string>(MetadataElement.AuthorLogin);
var authorName = metadataWrapper.Read <string>(MetadataElement.AuthorName);
record = new ObjectMetadataRecord(
templateId,
versionId,
response.LastModified,
new AuthorInfo(author, authorLogin, authorName));
}
catch (AmazonS3Exception ex) when(ex.StatusCode == HttpStatusCode.NotFound)
{
record = null;
}
catch (ObjectNotFoundException)
{
record = null;
}
result[x.Current.Key] = record;
}
});
await Task.WhenAll(tasks);
return(result.Where(x => x != null).ToList());
}