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Roslyn analyzers for Azure Functions

Component:
NServiceBus.AzureFunctions.Worker.ServiceBus

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Starting in version 4.2, the Azure Functions host package comes with Roslyn analyzers that analyze the NServiceBus code to prevent the use of API calls that are not applicable in a serverless environment.

Endpoint configuration API

PurgeOnStartup is not supported

Rule ID: NSBWFUNC004
Severity:Error
Example message: Azure Functions endpoints do not support PurgeOnStartup.

LimitMessageProcessingTo is not supported

Rule ID: NSBWFUNC005
Severity:Error
Example message: Concurrency-related settings are controlled via the Azure Function host.json configuration file.

DefineCriticalErrorAction is not supported

Rule ID: NSBWFUNC006
Severity:Error
Example message: Azure Functions endpoints do not control the application lifecycle and should not define behavior in the case of critical errors.

SetDiagnosticsPath is not supported

Rule ID: NSBWFUNC007
Severity:Error
Example message: Azure Functions endpoints should not write diagnostics to the local file system. Use CustomDiagnosticsWriter to write diagnostics to another location.

MakeInstanceUniquelyAddressable is not supported

Rule ID: NSBWFUNC008
Severity:Error
Example message: Azure Functions endpoints have unpredictable lifecycles and should not be uniquely addressable.

UseTransport is not supported

Rule ID: NSBWFUNC009
Severity:Warning
Example message: The package configures Azure Service Bus transport by default. Use ServiceBusTriggeredEndpointConfiguration.Transport to access the transport configuration.

OverrideLocalAddress is not supported

Rule ID: NSBWFUNC010
Severity:Error
Example message: The NServiceBus endpoint address in Azure Functions is determined by the ServiceBusTrigger attribute.

Options API

RouteReplyToThisInstance is not supported

Rule ID: NSBWFUNC011
Severity:Error
Example message: Azure Functions instances cannot be directly addressed as they have a highly volatile lifetime. Use 'RouteToThisEndpoint' instead.

RouteToThisInstance is not supported

Rule ID: NSBWFUNC012
Severity:Error
Example message: Azure Functions instances cannot be directly addressed as they have a highly volatile lifetime. Use 'RouteToThisEndpoint' instead.

Transport Settings API

TransportTransactionMode is not supported

Rule ID: NSBWFUNC013
Severity:Error
Example message: Transport TransactionMode is controlled by the Azure Service Bus trigger and cannot be configured via the NServiceBus transport configuration API when using Azure Functions.

MaxAutoLockRenewalDuration is not supported

Rule ID: NSBWFUNC014
Severity:Error
Example message: Azure Functions endpoints do not control the message receiver and cannot decide the lock renewal duration.

PrefetchCount is not supported

Rule ID: NSBWFUNC015
Severity:Error
Example message: Message prefetching is controlled by the Azure Service Bus trigger and cannot be configured via the NServiceBus transport configuration API when using Azure Functions.

PrefetchMultiplier is not supported

Rule ID: NSBWFUNC016
Severity:Error
Example message: Message prefetching is controlled by the Azure Service Bus trigger and cannot be configured via the NServiceBus transport configuration API when using Azure Functions.

TimeToWaitBeforeTriggeringCircuitBreaker is not supported

Rule ID: NSBWFUNC017
Severity:Error
Example message: Azure Functions endpoints do not control the message receiver and cannot access circuit breaker settings.