Скачать или смотреть Unveiling the IPropertyFactory - Extracting Original Property Value Types in Serilog

Discover how to extract the original value types from `ILogEventPropertyFactory` and enrich your logging events with a string representation of enums in Serilog.
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This video is based on the question https://stackoverflow.com/q/63161623/ asked by the user 'Theodore Zographos' ( https://stackoverflow.com/u/320229/ ) and on the answer https://stackoverflow.com/a/63274700/ provided by the user 'Nicholas Blumhardt' ( https://stackoverflow.com/u/138206/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Unveiling the IPropertyFactory - Extracting Original Property Value Types in Serilog

Logging is a critical component of any software application, enabling developers to monitor and troubleshoot their code effectively. When working with structured logging in libraries like Serilog, you may run into challenges, particularly regarding property value types. Today, we'll address a common concern: how to access the original property value types from the ILogEventPropertyFactory, specifically for enriching log events that contain enum values.

The Problem at Hand

Imagine you are creating a custom logger enrich that needs to process log events. In your code, you want to identify properties that have enum value types and add a corresponding property showing the string representation of these enum values. A typical scenario might involve loops through log event properties, checking for enum types and subsequently creating new properties to enhance the clarity of logs.

You may find yourself wondering: How can you get the underlying property value type in this context? It's especially tricky since property values are often wrapped in Serilog's types, like Serilog.Events.ScalarValue and Serilog.Events.SequenceValue.

The Solution

To fetch the original value types from Serilog's wrapped properties, you can utilize conditional structures alongside casting operations. Here’s a step-by-step approach to implement this in your code, enriching your logging events effectively:

Step 1: Initialize Your Enricher

Create a class that implements the ILogEventEnricher interface. This is vital for any custom logging enrichment behavior you want to perform.

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Step 2: Loop Through the Properties

You will want to iterate through the properties of the log event to check their types.

Step 3: Check for Scalar Values

To effectively derive the type of each property, use the is keyword to check if the property value is a ScalarValue. If it is, you can then access that value to get its underlying type.

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Key Points of the Code

Type Checking: The conditional logic enables you to ascertain the actual type of the wrapped property.

Enum Handling: If the property is a valid enum, you create a new property that holds the string representation of its value.

Safeguarding New Properties: The AddPropertyIfAbsent() method ensures that properties are added only if they aren't already present, preventing duplicates.

Conclusion

By following these steps, you can elegantly get the original property value types from the ILogEventPropertyFactory while adding enriched representation to enum values within your log events. This approach fosters better readability and enhances the usefulness of your log outputs, ultimately leading to improved application maintainability.

Implementing custom enrichers that handle enum types can significantly improve the clarity and usability of your logs. So, grab your code editor and start enhancing your logging!