public TCloseBlock OpenFlow()

in TeamCity.ServiceMessages/Write/Special/Impl/Writer/TeamCityFlowWriter.cs [31:57]

• 22 lines of code
• 4 McCabe index (conditional complexity)

        public TCloseBlock OpenFlow()
        {
            AssertNoChildOpened();

            var processor = myTarget.ForNewFlow();
            var block = _closeBlock(
                new DisposableDelegate(() => CloseBlock(processor)),
                processor
            );

            //##teamcity[flowStarted flowId='%lt;new flow id>' parent='current flow id']
            var flowStartedMessage = new ServiceMessage("flowStarted");
            if (myTarget.FlowId != null)
            {
                flowStartedMessage.Add("parent", myTarget.FlowId);
            }
            processor.AddServiceMessage(flowStartedMessage);

            if (!_openChildFlowIds.Add(processor.FlowId))
            {
                var parentFlowMessagePart = myTarget.FlowId != null ? $" in parent flow '{myTarget.FlowId}'" : "";
                throw new InvalidOperationException($"Cannot open a new child flow with id '{processor.FlowId}'" +
                                                    $"{parentFlowMessagePart} because a child flow with the same id is already open");
            }

            return block;
        }