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ability to use layouts for DatabaseName and CollectionName #6

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5 changes: 3 additions & 2 deletions src/NLog.MongoDB.NetCore/IMongoTarget.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System.Collections.Generic;
using NLog.Layouts;

namespace NLog.MongoDB.NetCore
{
Expand Down Expand Up @@ -37,15 +38,15 @@ public interface IMongoTarget
/// <value>
/// The name of the database.
/// </value>
string DatabaseName { get; set; }
Layout DatabaseName { get; set; }

/// <summary>
/// Gets or sets the name of the collection.
/// </summary>
/// <value>
/// The name of the collection.
/// </value>
string CollectionName { get; set; }
Layout CollectionName { get; set; }

/// <summary>
/// Gets or sets the size in bytes of the capped collection.
Expand Down
38 changes: 24 additions & 14 deletions src/NLog.MongoDB.NetCore/MongoTarget.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
using System.Globalization;
using System.IO;
using System.Linq;
using NLog.Layouts;

namespace NLog.MongoDB.NetCore
{
Expand All @@ -19,6 +20,11 @@ namespace NLog.MongoDB.NetCore
[Target("Mongo")]
public class MongoTarget : Target, IMongoTarget
{
static MongoTarget()
{
BsonDefaults.GuidRepresentation = GuidRepresentation.Standard;
}

#region Fields

private static readonly ConcurrentDictionary<string, IMongoCollection<BsonDocument>> _collectionCache = new ConcurrentDictionary<string, IMongoCollection<BsonDocument>>();
Expand Down Expand Up @@ -71,15 +77,15 @@ public class MongoTarget : Target, IMongoTarget
/// <value>
/// The name of the database.
/// </value>
public string DatabaseName { get; set; }
public Layout DatabaseName { get; set; }

/// <summary>
/// Gets or sets the name of the collection.
/// </summary>
/// <value>
/// The name of the collection.
/// </value>
public string CollectionName { get; set; }
public Layout CollectionName { get; set; }

/// <summary>
/// Gets or sets the size in bytes of the capped collection.
Expand Down Expand Up @@ -147,10 +153,13 @@ protected override void Write(AsyncLogEventInfo[] logEvents)

try
{
var documents = logEvents.Select(e => CreateDocument(e.LogEvent));
var groupings = logEvents
.Select(e => Tuple.Create(CreateDocument(e.LogEvent),
GetCollection(e.LogEvent)))
.GroupBy(tuple => tuple.Item2);

var collection = GetCollection();
collection.InsertMany(documents);
foreach (var grouping in groupings)
grouping.Key.InsertMany(grouping.Select(g => g.Item1));

foreach (var ev in logEvents)
ev.Continuation(null);
Expand Down Expand Up @@ -179,7 +188,7 @@ protected override void Write(LogEventInfo logEvent)
try
{
var document = CreateDocument(logEvent);
var collection = GetCollection();
var collection = GetCollection(logEvent);
collection.InsertOne(document);
}
catch (Exception ex)
Expand Down Expand Up @@ -316,25 +325,26 @@ private BsonValue GetValue(MongoField field, LogEventInfo logEvent)
return new BsonString(value);
}

private IMongoCollection<BsonDocument> GetCollection()
private IMongoCollection<BsonDocument> GetCollection(LogEventInfo logEvent)
{
string connectionName = ConnectionName ?? string.Empty;
string connectionString = ConnectionString ?? string.Empty;

var mongoUrl = new MongoUrl(connectionString);
string databaseName = DatabaseName.Render(logEvent) ?? mongoUrl.DatabaseName ?? "NLog";
string collectionName = CollectionName.Render(logEvent) ?? "Log";

// cache mongo collection based on target name.
string key = string.Format("k|{0}|{1}|{2}",
ConnectionName ?? string.Empty,
ConnectionString ?? string.Empty,
CollectionName ?? string.Empty);
string key = $"k|{connectionName}|{connectionString}|{databaseName}|{collectionName}";

return _collectionCache.GetOrAdd(key, k =>
{
// create collection
var mongoUrl = new MongoUrl(ConnectionString);
var client = new MongoClient(mongoUrl);

// Database name overrides connection string
var databaseName = DatabaseName ?? mongoUrl.DatabaseName ?? "NLog";
var database = client.GetDatabase(databaseName);

string collectionName = CollectionName ?? "Log";
if (!CappedCollectionSize.HasValue || CollectionExists(database, collectionName))
return database.GetCollection<BsonDocument>(collectionName);

Expand Down