/// <summary>
///
/// </summary>
/// <param name="uiOption"></param>
/// <param name="strMessageTitle"></param>
/// <param name="strMessageContent"></param>
/// <returns></returns>
public static bool CreateIndex(IndexOption uiOption, ref string strMessageTitle, ref string strMessageContent)
{
var result = true;
var option = new IndexOptionsBuilder();
option.SetBackground(uiOption.IsBackground);
option.SetDropDups(uiOption.IsDropDups);
option.SetSparse(uiOption.IsSparse);
option.SetUnique(uiOption.IsUnique);
if (uiOption.IsPartial)
{
IMongoQuery query = (QueryDocument) BsonDocument.Parse(uiOption.PartialCondition);
option.SetPartialFilterExpression(query);
}
if (uiOption.IsExpireData)
{
//TTL的限制条件很多
//http://docs.mongodb.org/manual/tutorial/expire-data/
//不能是组合键
var canUseTtl = true;
if (uiOption.AscendingKey.Count + uiOption.DescendingKey.Count +
(string.IsNullOrEmpty(uiOption.GeoSpatialKey) ? 0 : 1) != 1)
{
strMessageTitle = "Can't Set TTL";
strMessageContent = "the TTL index may not be compound (may not have multiple fields).";
canUseTtl = false;
}
else
{
//不能是_id
if (uiOption.FirstKey == ConstMgr.KeyId)
{
strMessageTitle = "Can't Set TTL";
strMessageContent =
"you cannot create this index on the _id field, or a field that already has an index.";
canUseTtl = false;
}
}
if (RuntimeMongoDbContext.GetCurrentCollection().IsCapped())
{
strMessageTitle = "Can't Set TTL";
strMessageContent =
"you cannot use a TTL index on a capped collection, because MongoDB cannot remove documents from a capped collection.";
canUseTtl = false;
}
if (canUseTtl)
{
strMessageTitle = "Constraints Of TimeToLive";
strMessageContent =
"the indexed field must be a date BSON type. If the field does not have a date type, the data will not expire." +
Environment.NewLine +
"if the field holds an array, and there are multiple date-typed data in the index, the document will expire when the lowest (i.e. earliest) matches the expiration threshold.";
option.SetTimeToLive(new TimeSpan(0, 0, uiOption.Ttl));
}
}
var totalIndex = uiOption.AscendingKey.Count + uiOption.DescendingKey.Count +
(string.IsNullOrEmpty(uiOption.GeoSpatialKey) ? 0 : 1) +
(string.IsNullOrEmpty(uiOption.TextKey) ? 0 : 1);
if (uiOption.IndexName != string.Empty &&
!RuntimeMongoDbContext.GetCurrentCollection().IndexExists(uiOption.IndexName) && totalIndex != 0)
{
option.SetName(uiOption.IndexName);
try
{
//暂时要求只能一个TextKey
if (!string.IsNullOrEmpty(uiOption.TextKey))
{
var textKeysDoc = new IndexKeysDocument {{uiOption.TextKey, "text"}};
RuntimeMongoDbContext.GetCurrentCollection().CreateIndex(textKeysDoc, option);
}
else
{
CreateMongoIndex(uiOption.AscendingKey.ToArray(), uiOption.DescendingKey.ToArray(),
uiOption.GeoSpatialKey,
option, RuntimeMongoDbContext.GetCurrentCollection());
}
strMessageTitle = "Index Add Completed!";
strMessageContent = "IndexName:" + uiOption.IndexName + " is add to collection.";
}
catch
{
strMessageTitle = "Index Add Failed!";
strMessageContent = "IndexName:" + uiOption.IndexName;
result = false;
}
}
else
{
strMessageTitle = "Index Add Failed!";
strMessageContent = "Please Check the index information.";
result = false;
}
return result;
}
/// <summary>
/// </summary>
/// <param name="KeyOptions"></param>
/// <param name="strMessageTitle"></param>
/// <param name="strMessageContent"></param>
/// <returns></returns>
public static bool CreateIndex(IndexOption KeyOptions, ref string strMessageTitle, ref string strMessageContent)
{
var option = new IndexOptionsBuilder();
option.SetBackground(KeyOptions.IsBackground);
option.SetDropDups(KeyOptions.IsDropDups);
option.SetSparse(KeyOptions.IsSparse);
option.SetUnique(KeyOptions.IsUnique);
if (KeyOptions.IsPartial)
{
IMongoQuery query = (QueryDocument)BsonDocument.Parse(KeyOptions.PartialCondition);
option.SetPartialFilterExpression(query);
}
if (KeyOptions.IsExpireData)
{
//TTL的限制条件很多
//http://docs.mongodb.org/manual/tutorial/expire-data/
//不能是组合键
var canUseTtl = true;
if (KeyOptions.AscendingKey.Count + KeyOptions.DescendingKey.Count +
(string.IsNullOrEmpty(KeyOptions.GeoSpatialKey) ? 0 : 1) != 1)
{
strMessageTitle = "Can't Set TTL";
strMessageContent = "the TTL index may not be compound (may not have multiple fields).";
canUseTtl = false;
}
else
{
//不能是_id
if (KeyOptions.FirstKey == ConstMgr.KeyId)
{
strMessageTitle = "Can't Set TTL";
strMessageContent =
"you cannot create this index on the _id field, or a field that already has an index.";
canUseTtl = false;
}
}
if (RuntimeMongoDbContext.GetCurrentCollection().IsCapped())
{
strMessageTitle = "Can't Set TTL";
strMessageContent =
"you cannot use a TTL index on a capped collection, because MongoDB cannot remove documents from a capped collection.";
canUseTtl = false;
}
if (canUseTtl)
{
strMessageTitle = "Constraints Of TimeToLive";
strMessageContent =
"the indexed field must be a date BSON type. If the field does not have a date type, the data will not expire." +
Environment.NewLine +
"if the field holds an array, and there are multiple date-typed data in the index, the document will expire when the lowest (i.e. earliest) matches the expiration threshold.";
option.SetTimeToLive(new TimeSpan(0, 0, KeyOptions.Ttl));
}
}
var totalIndex = KeyOptions.AscendingKey.Count + KeyOptions.DescendingKey.Count + KeyOptions.TextKey.Count;
totalIndex += string.IsNullOrEmpty(KeyOptions.GeoSpatialHaystackKey) ? 0 : 1;
totalIndex += string.IsNullOrEmpty(KeyOptions.GeoSpatialKey) ? 0 : 1;
totalIndex += string.IsNullOrEmpty(KeyOptions.GeoSpatialSphericalKey) ? 0 : 1;
totalIndex += string.IsNullOrEmpty(KeyOptions.HashedKey) ? 0 : 1;
if (string.IsNullOrEmpty(KeyOptions.IndexName) || totalIndex == 0 ||
RuntimeMongoDbContext.GetCurrentCollection().IndexExists(KeyOptions.IndexName))
{
strMessageTitle = "Index Add Failed!";
strMessageContent = "Please Check the index information.";
return false;
}
option.SetName(KeyOptions.IndexName);
string errorMessage = string.Empty;
if (CreateMongoIndex(KeyOptions, option, RuntimeMongoDbContext.GetCurrentCollection(), ref errorMessage))
{
strMessageTitle = "Index Add Completed!";
strMessageContent = "IndexName:" + KeyOptions.IndexName + " is add to collection.";
return true;
}
else
{
strMessageTitle = "Index Add Failed!";
strMessageContent = errorMessage;
return false;
}
}
