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feat(metrics): update metrics to version 2.0.0, enhance cold start tr…
…acking, and improve documentation
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31 changes: 31 additions & 0 deletions
31
libraries/src/AWS.Lambda.Powertools.Common/Core/ConsoleWrapper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /* | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * A copy of the License is located at | ||
| * | ||
| * http://aws.amazon.com/apache2.0 | ||
| * | ||
| * or in the "license" file accompanying this file. This file is distributed | ||
| * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either | ||
| * express or implied. See the License for the specific language governing | ||
| * permissions and limitations under the License. | ||
| */ | ||
|
|
||
| using System; | ||
|
|
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| namespace AWS.Lambda.Powertools.Common; | ||
|
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| /// <inheritdoc /> | ||
| public class ConsoleWrapper : IConsoleWrapper | ||
| { | ||
| /// <inheritdoc /> | ||
| public void WriteLine(string message) => Console.WriteLine(message); | ||
| /// <inheritdoc /> | ||
| public void Debug(string message) => System.Diagnostics.Debug.WriteLine(message); | ||
| /// <inheritdoc /> | ||
| public void Error(string message) => Console.Error.WriteLine(message); | ||
| /// <inheritdoc /> | ||
| public string ReadLine() => Console.ReadLine(); | ||
| } |
46 changes: 46 additions & 0 deletions
46
libraries/src/AWS.Lambda.Powertools.Common/Core/IConsoleWrapper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| /* | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * A copy of the License is located at | ||
| * | ||
| * http://aws.amazon.com/apache2.0 | ||
| * | ||
| * or in the "license" file accompanying this file. This file is distributed | ||
| * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either | ||
| * express or implied. See the License for the specific language governing | ||
| * permissions and limitations under the License. | ||
| */ | ||
|
|
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| namespace AWS.Lambda.Powertools.Common; | ||
|
|
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| /// <summary> | ||
| /// Wrapper for console operations to facilitate testing by abstracting system console interactions. | ||
| /// </summary> | ||
| public interface IConsoleWrapper | ||
| { | ||
| /// <summary> | ||
| /// Writes the specified message followed by a line terminator to the standard output stream. | ||
| /// </summary> | ||
| /// <param name="message">The message to write.</param> | ||
| void WriteLine(string message); | ||
|
|
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| /// <summary> | ||
| /// Writes a debug message to the trace listeners in the Debug.Listeners collection. | ||
| /// </summary> | ||
| /// <param name="message">The debug message to write.</param> | ||
| void Debug(string message); | ||
|
|
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| /// <summary> | ||
| /// Writes the specified error message followed by a line terminator to the standard error stream. | ||
| /// </summary> | ||
| /// <param name="message">The error message to write.</param> | ||
| void Error(string message); | ||
|
|
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| /// <summary> | ||
| /// Reads the next line of characters from the standard input stream. | ||
| /// </summary> | ||
| /// <returns>The next line of characters from the input stream, or null if no more lines are available.</returns> | ||
| string ReadLine(); | ||
| } |
76 changes: 76 additions & 0 deletions
76
libraries/src/AWS.Lambda.Powertools.Metrics.AspNetCore/Http/ColdStartTracker.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /* | ||
| * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * A copy of the License is located at | ||
| * | ||
| * http://aws.amazon.com/apache2.0 | ||
| * | ||
| * or in the "license" file accompanying this file. This file is distributed | ||
| * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either | ||
| * express or implied. See the License for the specific language governing | ||
| * permissions and limitations under the License. | ||
| */ | ||
|
|
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| using Amazon.Lambda.Core; | ||
| using Microsoft.AspNetCore.Http; | ||
|
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| namespace AWS.Lambda.Powertools.Metrics.AspNetCore.Http; | ||
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| /// <summary> | ||
| /// Tracks and manages cold start metrics for Lambda functions in ASP.NET Core applications. | ||
| /// </summary> | ||
| /// <remarks> | ||
| /// This class is responsible for detecting and recording the first invocation (cold start) of a Lambda function. | ||
| /// It ensures thread-safe tracking of cold starts and proper metric capture using the provided IMetrics implementation. | ||
| /// </remarks> | ||
| internal class ColdStartTracker : IDisposable | ||
| { | ||
| private readonly IMetrics _metrics; | ||
| private static bool _coldStart = true; | ||
| private static readonly object _lock = new(); | ||
|
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ColdStartTracker"/> class. | ||
| /// </summary> | ||
| /// <param name="metrics">The metrics implementation to use for capturing cold start metrics.</param> | ||
| public ColdStartTracker(IMetrics metrics) | ||
| { | ||
| _metrics = metrics; | ||
| } | ||
|
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| /// <summary> | ||
| /// Tracks the cold start of the Lambda function. | ||
| /// </summary> | ||
| /// <param name="context">The current HTTP context.</param> | ||
| internal void TrackColdStart(HttpContext context) | ||
| { | ||
| if (!_coldStart) return; | ||
|
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| lock (_lock) | ||
| { | ||
| if (!_coldStart) return; | ||
| _metrics.CaptureColdStartMetric(context.Items["LambdaContext"] as ILambdaContext); | ||
| _coldStart = false; | ||
| } | ||
| } | ||
|
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| /// <summary> | ||
| /// Resets the cold start tracking state. | ||
| /// </summary> | ||
| internal static void ResetColdStart() | ||
| { | ||
| lock (_lock) | ||
| { | ||
| _coldStart = true; | ||
| } | ||
| } | ||
|
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| /// <inheritdoc /> | ||
| public void Dispose() | ||
| { | ||
| ResetColdStart(); | ||
| } | ||
| } |
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