public List <CollectionInfo> GetAllCollectionList()
{
if (collectionList == null)
{
lock (collectionLock)
{
if (collectionList == null)
{
collectionList = MongoStorage.GetCollection <CollectionInfo>(EventDataBase, C_CName).Find <CollectionInfo>(c => c.Type == EventCollection).ToList();
}
}
}
return(collectionList);
}
public CollectionInfo GetCollection(DateTime sysStartTime, DateTime eventTime)
{
CollectionInfo lastCollection = null;
var cList = GetAllCollectionList();
if (cList.Count > 0)
{
lastCollection = cList.Last();
}
//如果不需要分表，直接返回
if (lastCollection != null && !this.sharding)
{
return(lastCollection);
}
var subTime = eventTime.Subtract(sysStartTime);
var cVersion = subTime.TotalDays > 0 ? Convert.ToInt32(Math.Floor(subTime.TotalDays / shardingDays)) : 0;
if (lastCollection == null || cVersion > lastCollection.Version)
{
lock (collectionLock)
{
if (lastCollection == null || cVersion > lastCollection.Version)
{
var collection = new CollectionInfo();
collection.Id = ObjectId.GenerateNewId().ToString();
collection.Version = cVersion;
collection.Type = EventCollection;
collection.CreateTime = DateTime.UtcNow;
collection.Name = EventCollection + "_" + cVersion;
try
{
MongoStorage.GetCollection <CollectionInfo>(EventDataBase, C_CName).InsertOne(collection);
collectionList.Add(collection);
lastCollection = collection;
CreateEventIndex(collection.Name);
}
catch (MongoWriteException ex)
{
if (ex.WriteError.Category == ServerErrorCategory.DuplicateKey)
{
collectionList = null;
return(GetCollection(sysStartTime, eventTime));
}
}
}
}
}
return(lastCollection);
}
private void CreateCollectionIndex()
{
Task.Run(async() =>
{
var collectionService = MongoStorage.GetCollection <BsonDocument>(EventDataBase, C_CName);
CancellationTokenSource cancel = new CancellationTokenSource(1);
var index = await collectionService.Indexes.ListAsync();
var indexList = await index.ToListAsync();
if (!indexList.Exists(p => p["name"] == "Name"))
{
await collectionService.Indexes.CreateOneAsync("{'Name':1}", new CreateIndexOptions {
Name = "Name", Unique = true
});
}
}).ConfigureAwait(false);
}
private void CreateEventIndex(string collectionName)
{
var collectionService = MongoStorage.GetCollection <BsonDocument>(EventDataBase, collectionName);
var indexList = collectionService.Indexes.List().ToList();
if (!indexList.Exists(p => p["name"] == "State_Version") && !indexList.Exists(p => p["name"] == "State_MsgId"))
{
collectionService.Indexes.CreateMany(
new List <CreateIndexModel <BsonDocument> >()
{
new CreateIndexModel <BsonDocument>("{'StateId':1,'Version':1}", new CreateIndexOptions {
Name = "State_Version", Unique = true
}),
new CreateIndexModel <BsonDocument>("{'StateId':1,'TypeCode':1,'MsgId':1}", new CreateIndexOptions {
Name = "State_MsgId", Unique = true
})
}
);
}
}
