//TODO That is not ready to be used with some IoC container like Castle or Unity
public AsyncMessagePersister(IMessageWriterFactory factory, IMessageFactory messageFactory, IDateFactory dateFactory)
{
this.messageWriterFactory = factory;
this.dateFactory = dateFactory;
this.messageFactory = messageFactory;
this.writer = CreateMessageWriter(factory);
if (this.writer != null)
{
this.runThread = new Thread(this.Processing);
this.runThread.Start();
}
else
{
//TODO instead of Console.Writeline it could be some other persister like log4net log
Console.WriteLine("Cannot initialize Async Log!");
}
}
private static IMessageWriter ConfigureStubsAndMocksForAsyncLog(out IMessagePersister persister,
string testString,
DateTime logTimeStamp,
IDateFactory dateFactory,
out IMessageWriterFactory mockMessageWriterFactory,
int expecteNumberOfTimesCreateToCall)
{
mockMessageWriterFactory = MockRepository.GenerateMock <IMessageWriterFactory>();
IMessageWriter mockWriter = MockRepository.GenerateMock <IMessageWriter>();
IMessageFactory stubMessageFactory = MockRepository.GenerateStub <IMessageFactory>();
IMessage stubMessage = MockRepository.GenerateStub <IMessage>();
stubMessage.Stub(x => x.FormatMessage()).Return(testString);
stubMessage.Timestamp = logTimeStamp;
stubMessageFactory.Stub(x => x.GetMessage(Arg <string> .Is.Anything, Arg <DateTime> .Is.Anything))
.Return(stubMessage);
mockMessageWriterFactory.Expect(x => x.Create()).Return(mockWriter).Repeat.Times(expecteNumberOfTimesCreateToCall);
persister = new AsyncMessagePersister(mockMessageWriterFactory, stubMessageFactory, dateFactory);
return(mockWriter);
}
private IMessageWriter CreateMessageWriter(IMessageWriterFactory factory)
{
IMessageWriter writer = null;
try
{
//TODO Currently this implementation is limited by one writer for the log e.g. FileMessageWriter or ConsoleWriter,etc
//TODO It is possible to introduce concept of appenders instead of writers. E.g. to define more than one "appender"
//TODO in application config, initialize collection of appenders and than call IAppedner.Persist() for every appender in collection
writer = factory.Create();
}
catch (Exception ex)
{
//Catch exception per this requirment: If an error occur the calling application must not be put down.
// It is more important that the application continues to run than lines not being written to log
Console.Write("Error creating MessagePersister: {0}", ex.Message);
//throw new ApplicationException(String.Format("Error creating MessagePersister: {0}", ex.Message));
}
return(writer);
}
