示例#1
0
        public void SetupCollection()
        {
            var           uri    = new MongoUrl(ConnectionString);
            var           client = new MongoClient(uri);
            MongoDatabase db     = client.GetServer().GetDatabase(uri.DatabaseName);
            Int64         cappedSize;

            if (!Int64.TryParse(CappedSizeInMb, out cappedSize))
            {
                cappedSize = 5 * 1024L;
            }
            if (!db.CollectionExists(CollectionName))
            {
                CollectionOptionsBuilder options = CollectionOptions
                                                   .SetCapped(true)
                                                   .SetMaxSize(1024L * 1024L * cappedSize); //5 gb.
                db.CreateCollection(CollectionName, options);
            }
            LogCollection = db.GetCollection(CollectionName);
            var builder = new IndexOptionsBuilder();

            const string ttlIndex = FieldNames.Timestamp + "_-1";
            var          index    = LogCollection.GetIndexes().SingleOrDefault(x => x.Name == ttlIndex);

            if (index != null)
            {
                if (ExpireAfter != null)
                {
                    if (index.TimeToLive != ExpireAfter.ToTimeSpan())
                    {
                        var d = new CommandDocument()
                        {
                            { "collMod", CollectionName },
                            {
                                "index", new BsonDocument
                                {
                                    { "keyPattern", new BsonDocument {
                                          { FieldNames.Timestamp, -1 }
                                      } },
                                    { "expireAfterSeconds", (int)(ExpireAfter.ToTimeSpan().TotalSeconds) }
                                }
                            }
                        };

                        db.RunCommand(d);
                    }
                }
            }
            else
            {
                if (ExpireAfter != null)
                {
                    builder.SetTimeToLive(ExpireAfter.ToTimeSpan());
                }

                LogCollection.CreateIndex(IndexKeys.Descending(FieldNames.Timestamp), builder);
            }

            LogCollection.CreateIndex(IndexKeys
                                      .Ascending(FieldNames.Level, FieldNames.Thread, FieldNames.Loggername)
                                      );
        }