Azure Function App Exception Handling.pptx
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The document discusses important etiquette for attending sessions and provides an overview of exception handling within function applications. It emphasizes the significance of managing exceptions for application reliability, user experience, and security, detailing various types of exceptions and handling methods such as try-catch blocks, logging, and custom exception handling. Best practices for error management and secure exception handling are also outlined to prevent information leakage and optimize application performance.
Azure Function App Exception Handling.pptx
- 1. Function App Exception Handling Dhruv Sharma Anurag
- 2. Lack of etiquette and manners is a huge turn off. KnolX Etiquettes Punctuality Join the session 5 minutes prior to the session start time. We start on time and conclude on time! Feedback Make sure to submit a constructive feedback for all sessions as it is very helpful for the presenter. Silent Mode Keep your mobile devices in silent mode, feel free to move out of session in case you need to attend an urgent call. Avoid Disturbance Avoid unwanted chit chat during the session.
- 3. 1. Introduction to Exception Handling 2. Why Exception Handling Matters 3. Types of Exceptions in Function App 4. Types of Exceptions Handling in Function App 5. Security Considerations 6. Demo
- 5. What is Exception Handling & Why it matters Exception handling is a mechanism to handle runtime errors or abnormal situations that may occur during the execution of a program. Exception handling allows the program to continue its normal flow or terminate gracefully without crashing. IMPORTANCE - Exception handling is the process of dealing with unexpected or exceptional situations that can occur during the execution of a program. In.NET, exceptions are objects that represent errors, and they are thrown when an abnormal condition is encountered. Properly managing these exceptions is vital for creating stable and reliable applications.
- 6. Impact of Unhandled Exceptions on application reliability in function app Some exceptions may not be properly handled, resulting in resource leakage,. For instance, if the function app fails to release database connections, file handles, or other resources after encountering an exception, it can lead to resource exhaustion over time. Data Integrity Application Stability Resource Leakage Unhandled exceptions can cause the function app to crash or become unresponsive. This leads to downtime, disrupting the service provided by the application. If an exception occurs during the processing for data within the function ap, it can lead to data corruption or loss. For e.g. If the function app is responsible for processing transactions, an exception could leave the data in an inconsistent state, leading to inaccuracies or even data loss. Unhandled exceptions can expose sensitive information about the application's internals, such as stack traces or error messages, which could be exploited by malicious actors. For ex- revealing detailed error messages in the prod environments might leak information about the system architecture or underlying technologies. Security Risks 1. 2. 3. 4.
- 7. • Importance of graceful error handling for improving user experience Enhanced User Satisfaction Clear Communication Reduced user abandonment Brand Reputation Insights for Improvement Note: It plays a very crucial role in improving the user experience of a function app Reliability issues caused by unhandled exceptions can have a negative impact on the customer experience. Users expect applications to be robust and responsive. When they encounter any error or downtime, it can lead to frustration and dissatisfaction. Customer Experience 5.
- 8. 1. Index Out Of Range Exception 2. Divide By Zero Exception 3. Out Of Memory Exception 4. System Exception 5. Argument Null Exception 6. Null Reference Exception 7. DLL Not Found Exception 8. Argument Out Of Range Exception 9. IO Exception TYPES OF EXCEPTIONS IN FUNCTION APP
- 9. TYPES OF EXCEPTION HANDLING IN FUNCTION APP 1. Try-Catch-Finally Blocks 2. Logging Exceptions. 3. Custom Exception Handling. 4. Retry Policies.
- 10. Try-Catch-Finally BLOCKS Try Block It contains code that may throw exceptions. Execution of code begins here. If an exception occurs, control moves to the catch blocks. Catch Block Follows the try block. Handles exception thrown within the try block. Code have multiple catch blocks for different exceptions types. Finally Block Optional block after catch. Always executes, regardless of exceptions. Useful for must executed code.
- 11. LOGGING EXCEPTION: Logging exceptions is crucial for effective error management and debugging in software development. It involves recording information about exceptions that occur during program execution for analysis and troubleshooting purposes. Importance: Error Diagnosis: Logging exceptions provides valuable insights into the circumstances under which errors occur, aiding developers in diagnosing and resolving issue efficiently. Troubleshooting: Detailed exception logs enable developers to reproduce errors and identify patterns, making troubleshooting more effective and reducing resolution time. Performance Monitoring: Monitoring exceptions over time helps in tracking the stability and performance of the software, enabling proactive measures to improve reliability.
- 12. Best Practices of Logging Exceptions: • Include Context: Log relevant contextual information along with the exception, such as timestamps, user actions, and system state, to facilitate through analysis. • Severity Levels: Assign appropriate severity levels to logged exceptions(e.g. INFO, WARN, ERROR) to prioritize and categorize issues for timely resolution. • Consistency: Follow consistent logging conventions and formats across the applications to streamline error tracking and analysis. • Secure Logging: Ensure the sensitive information is not exposed in exception logs to maintain data security and compliance.
- 13. CUSTOM EXCEPTION HANDLING Custom exception handling in .NET allows developers to define and use their own exception types tailored to the specific requirements of their applications. Importance: Domain-Specific Errors: Custom exceptions enable developers to represent domain specific error, making error handling more meaningful and effective. Centralized Error Management: Centralizing error handling logic within custom exceptions promotes code organization and maintainability. Granular Error Handling: Provides the ability to define and handle application-specific errors with precision. Enhanced Readability: Custom exceptions with descriptive names and clear hierarchy improve code readability and maintainability.
- 14. RETRY POLICIES Retry Policies in .NET provide a systematic approach to handling transient failures by automatically retrying failed operations with configurable strategies. Importance: • Resilient Applications: Retry policies enhance application resilience by mitigating the impact of transient failures, such as network issues or temporary service unavailability. • Improved User Experience: Transparently retrying failed operations reduces the likelihood of user- facing errors and improves overall application usability. • Customizable Strategies: Developers can tailor retry policies to specific scenarios, adjusting factors like retry intervals and maximum retry attempts. • Define Retry Policies: Create reusable retry policy objects with configurable parameters like retry attempts, delay intervals, and error conditions. • Circuit Breaker Integration: Combine retry policies with circuit breaker patterns to gracefully handle repeated failures and prevent excessive retries.
- 15. SECURITY CONSIDERATIONS: Secure exception handling practices are essential to prevent information leakage and protect against potential security vulnerabilities. This includes avoiding exposure of sensitive information in error messages, implementing proper authentication and authorization mechanisms, and conducting regular security audits. Best Practices : • Avoiding Exposure of Sensitive Information: Prevent accidental exposure of sensitive data in error messages or logs. • Implementing Proper Authorization and Authentication: Ensure that only authorized users can access function Endpoints and data. • Regular Security Audits and Monitoring: Identify and mitigate security vulnerabilities proactively. NOTE : By following these practices, Function Apps can handle exceptions securely, protect sensitive data, and maintain a robust security posture against potential threats and vulnerabilities.
- 16. DEMO