/// <summary> アップロード済みのファイルのハッシュデータ取得. </summary>
private async Task <Dictionary <string, string> > GetUploadedObjectHashTable(S3Client s3Client, S3Object[] s3Objects)
{
var hashTable = new Dictionary <string, string>();
var tasks = new List <Task>();
foreach (var s3Object in s3Objects)
{
var task = Task.Run(async() =>
{
var metaDataResponse = await s3Client.GetObjectMetaData(s3Object.Key);
var fileHash = metaDataResponse.Metadata[MetaDataHashKey];
lock (hashTable)
{
hashTable[s3Object.Key] = fileHash;
}
});
tasks.Add(task);
}
await Task.WhenAll(tasks.ToArray());
return(hashTable);
}
