private IEnumerable<MappedResultInfo> GetReducedResultsForBucket(string index, string reduceKey, int level, int bucket, bool loadData)
{
var results = storage.ReduceResults["ByViewReduceKeyLevelAndBucket"]
.SkipTo(new RavenJObject
{
{"view", index},
{"reduceKey", reduceKey},
{"level", level},
{"bucket", bucket}
})
.TakeWhile(x => string.Equals(index, x.Value<string>("view"), StringComparison.InvariantCultureIgnoreCase) &&
string.Equals(reduceKey, x.Value<string>("reduceKey"), StringComparison.InvariantCultureIgnoreCase) &&
level == x.Value<int>("level") &&
bucket == x.Value<int>("bucket"));
bool hasResults = false;
foreach (var result in results)
{
hasResults = true;
var readResult = storage.ReduceResults.Read(result);
var mappedResultInfo = new MappedResultInfo
{
ReduceKey = readResult.Key.Value<string>("reduceKey"),
Etag = new Guid(readResult.Key.Value<byte[]>("etag")),
Timestamp = readResult.Key.Value<DateTime>("timestamp"),
Bucket = readResult.Key.Value<int>("bucket"),
Source = readResult.Key.Value<int>("sourceBucket").ToString(),
Size = readResult.Size,
Data = loadData ? LoadMappedResult(readResult) : null
};
yield return mappedResultInfo;
}
if (hasResults)
yield break;
yield return new MappedResultInfo
{
Bucket = bucket,
ReduceKey = reduceKey
};
}
public IEnumerable<MappedResultInfo> GetMappedResultsReduceKeysAfter(string indexName, Guid lastReducedEtag, bool loadData, int take)
{
Api.JetSetCurrentIndex(session, MappedResults, "by_view_and_etag");
Api.MakeKey(session, MappedResults, indexName, Encoding.Unicode, MakeKeyGrbit.NewKey);
Api.MakeKey(session, MappedResults, lastReducedEtag, MakeKeyGrbit.None);
if (Api.TrySeek(session, MappedResults, SeekGrbit.SeekLE) == false)
return Enumerable.Empty<MappedResultInfo>();
var results = new Dictionary<string, MappedResultInfo>();
while (
results.Count < take &&
Api.RetrieveColumnAsString(session, MappedResults, tableColumnsCache.MappedResultsColumns["view"], Encoding.Unicode, RetrieveColumnGrbit.RetrieveFromIndex) == indexName)
{
var key = Api.RetrieveColumnAsString(session, MappedResults, tableColumnsCache.MappedResultsColumns["reduce_key"]);
var mappedResultInfo = new MappedResultInfo
{
ReduceKey =
key,
Etag = new Guid(Api.RetrieveColumn(session, MappedResults, tableColumnsCache.MappedResultsColumns["etag"])),
Timestamp =
Api.RetrieveColumnAsDateTime(session, MappedResults, tableColumnsCache.MappedResultsColumns["timestamp"]).
Value,
Data = loadData
? LoadMappedResults(key)
: null,
Size = Api.RetrieveColumnSize(session, MappedResults, tableColumnsCache.MappedResultsColumns["data"]) ?? 0
};
results[mappedResultInfo.ReduceKey] = mappedResultInfo;
// the index is view ascending and etag descending
// that means that we are going backward to go up
if (Api.TryMovePrevious(session, MappedResults) == false)
break;
}
return results.Values;
}
public IEnumerable<MappedResultInfo> GetMappedResultsReduceKeysAfter(string indexName, Guid lastReducedEtag, bool loadData, int take)
{
var mappedResultInfos = storage.MappedResults["ByViewAndEtagDesc"]
// the index is sorted view ascending and then etag descending
// we index before this index, then backward toward the last one.
.SkipBefore(new RavenJObject { { "view", indexName }, { "etag", lastReducedEtag.ToByteArray() } })
.TakeWhile(x => StringComparer.InvariantCultureIgnoreCase.Equals(x.Value<string>("view"), indexName))
.Select(key =>
{
var mappedResultInfo = new MappedResultInfo
{
ReduceKey = key.Value<string>("reduceKey"),
Etag = new Guid(key.Value<byte[]>("etag")),
Timestamp = key.Value<DateTime>("timestamp")
};
var readResult = storage.MappedResults.Read(key);
if (readResult != null)
{
mappedResultInfo.Size = readResult.Size;
if (loadData)
mappedResultInfo.Data = LoadMappedResult(readResult);
}
return mappedResultInfo;
});
var results = new Dictionary<string, MappedResultInfo>();
foreach (var mappedResultInfo in mappedResultInfos)
{
results[mappedResultInfo.ReduceKey] = mappedResultInfo;
if (results.Count == take)
break;
}
return results.Values;
}
public IEnumerable<MappedResultInfo> GetMappedResultsReduceKeysAfter(string indexName, Guid lastReducedEtag, bool loadData)
{
Api.JetSetCurrentIndex(session, MappedResults, "by_view_and_etag");
Api.MakeKey(session, MappedResults, indexName, Encoding.Unicode, MakeKeyGrbit.NewKey);
Api.MakeKey(session, MappedResults, lastReducedEtag, MakeKeyGrbit.None);
if (Api.TrySeek(session, MappedResults, SeekGrbit.SeekLE) == false)
yield break;
while (Api.RetrieveColumnAsString(session, MappedResults, tableColumnsCache.MappedResultsColumns["view"]) == indexName)
{
var result = new MappedResultInfo
{
ReduceKey = Api.RetrieveColumnAsString(session, MappedResults, tableColumnsCache.MappedResultsColumns["reduce_key"]),
Etag = new Guid(Api.RetrieveColumn(session, MappedResults, tableColumnsCache.MappedResultsColumns["etag"])),
Timestamp = Api.RetrieveColumnAsDateTime(session, MappedResults, tableColumnsCache.MappedResultsColumns["timestamp"]).Value,
};
if (loadData)
result.Data = Api.RetrieveColumn(session, MappedResults, tableColumnsCache.MappedResultsColumns["data"]).ToJObject();
yield return result;
// the index is view ascending and etag descending
// that means that we are going backward to go up
if (Api.TryMovePrevious(session, MappedResults) == false)
yield break;
}
}
