PublishMetric Method

Publishes a payload with a single metric.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
Public Shared Sub PublishMetric( _
   ByVal consumer As IEasySparkplugConsumer, _
   ByVal metricPublicationArguments As SparkplugMetricPublicationArguments _
)

'Usage
 
Dim consumer As IEasySparkplugConsumer
Dim metricPublicationArguments As SparkplugMetricPublicationArguments
 
IEasySparkplugConsumerExtension.PublishMetric(consumer, metricPublicationArguments)

[Extension()]
public static void PublishMetric( 
   IEasySparkplugConsumer consumer,
   SparkplugMetricPublicationArguments metricPublicationArguments
)

[Extension()]
public:
static void PublishMetric( 
   IEasySparkplugConsumer^ consumer,
   SparkplugMetricPublicationArguments^ metricPublicationArguments
)

Parameters

consumer: The consumer object that will perform the operation.
The value of this parameter cannot be null (Nothing in Visual Basic).
metricPublicationArguments: The Sparkplug metric publication arguments.
The value of this parameter cannot be null (Nothing in Visual Basic).

Exceptions

Exception Description

Exception	Description
System.ArgumentNullException	A `null` reference (`Nothing` in Visual Basic) is passed to a method that does not accept it as a valid argument. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.
OpcLabs.EasySparkplug.OperationModel.SparkplugException	The Sparkplug operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause. This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

System.ArgumentNullException

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

OpcLabs.EasySparkplug.OperationModel.SparkplugException

The Sparkplug operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

Remarks

This method can be used to publish a command addressed either to a Sparkplug edge node, or a device. When the OpcLabs.EasySparkplug.OperationModel.SparkplugArguments.DeviceId property of the metricPublicationArguments is an empty string, the command is published to an edge node. Otherwise, it is published to the device specified by the OpcLabs.EasySparkplug.OperationModel.SparkplugArguments.DeviceId property.

This is an extension method (info: C#, VB.NET). In languages that have support for extensions methods (such as C# and VB.NET), you can use the extension method as if it were a regular method on the object that is its first parameter. In other languages (such as with Python.NET), you will call the extension as a static method, and pass it the object on which it acts as its first parameter.

Sparkplug is a trademark of Eclipse Foundation, Inc. "MQTT" is a trademark of the OASIS Open standards consortium. Other related terms are trademarks of their respective owners. Any use of these terms on this site is for descriptive purposes only and does not imply any sponsorship, endorsement or affiliation.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

IEasySparkplugConsumerExtension Class
IEasySparkplugConsumerExtension Members
AutoStartStop Property
AutoGeneratedHostId Property

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