Update variable replacement during deserialization to use replacement settings class and add AKV replacement logic. #2882
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| using System.Text.Json; | ||
| using System.Text.Json.Serialization; | ||
| using Azure.DataApiBuilder.Config.ObjectModel; | ||
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| namespace Azure.DataApiBuilder.Config.Converters; | ||
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| /// <summary> | ||
| /// Converter factory for AzureKeyVaultOptions that can optionally perform variable replacement. | ||
| /// </summary> | ||
| internal class AzureKeyVaultOptionsConverterFactory : JsonConverterFactory | ||
| { | ||
| // Determines whether to replace environment variable with its | ||
| // value or not while deserializing. | ||
| private readonly DeserializationVariableReplacementSettings? _replacementSettings; | ||
|
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| /// <param name="replaceEnvVar">Whether to replace environment variable with its | ||
| /// value or not while deserializing.</param> | ||
| internal AzureKeyVaultOptionsConverterFactory(DeserializationVariableReplacementSettings? replacementSettings = null) | ||
| { | ||
| _replacementSettings = replacementSettings; | ||
| } | ||
|
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| /// <inheritdoc/> | ||
| public override bool CanConvert(Type typeToConvert) | ||
| { | ||
| return typeToConvert.IsAssignableTo(typeof(AzureKeyVaultOptions)); | ||
| } | ||
|
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| /// <inheritdoc/> | ||
| public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options) | ||
| { | ||
| return new AzureKeyVaultOptionsConverter(_replacementSettings); | ||
| } | ||
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| private class AzureKeyVaultOptionsConverter : JsonConverter<AzureKeyVaultOptions> | ||
| { | ||
| // Determines whether to replace environment variable with its | ||
| // value or not while deserializing. | ||
| private readonly DeserializationVariableReplacementSettings? _replacementSettings; | ||
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| /// <param name="replaceEnvVar">Whether to replace environment variable with its | ||
| /// value or not while deserializing.</param> | ||
| public AzureKeyVaultOptionsConverter(DeserializationVariableReplacementSettings? replacementSettings) | ||
| { | ||
| _replacementSettings = replacementSettings; | ||
| } | ||
|
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| /// <summary> | ||
| /// Reads AzureKeyVaultOptions with optional variable replacement. | ||
| /// </summary> | ||
| public override AzureKeyVaultOptions? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) | ||
| { | ||
| if (reader.TokenType is JsonTokenType.StartObject) | ||
| { | ||
| string? endpoint = null; | ||
| AKVRetryPolicyOptions? retryPolicy = null; | ||
|
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| while (reader.Read()) | ||
| { | ||
| if (reader.TokenType is JsonTokenType.EndObject) | ||
| { | ||
| return new AzureKeyVaultOptions | ||
| { | ||
| Endpoint = endpoint, | ||
| RetryPolicy = retryPolicy | ||
| }; | ||
| } | ||
|
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| string? property = reader.GetString(); | ||
| reader.Read(); | ||
|
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| switch (property) | ||
| { | ||
| case "endpoint": | ||
| if (reader.TokenType is JsonTokenType.String) | ||
| { | ||
| endpoint = reader.DeserializeString(_replacementSettings); | ||
| } | ||
|
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| break; | ||
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| case "retry-policy": | ||
| if (reader.TokenType is JsonTokenType.StartObject) | ||
| { | ||
| // Pass the replaceEnvVar setting to the retry policy converter | ||
| retryPolicy = JsonSerializer.Deserialize<AKVRetryPolicyOptions>(ref reader, options); | ||
| } | ||
|
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| break; | ||
|
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| default: | ||
| reader.Skip(); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| else if (reader.TokenType is JsonTokenType.Null) | ||
| { | ||
| return null; | ||
| } | ||
|
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| throw new JsonException("Invalid AzureKeyVaultOptions format"); | ||
| } | ||
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| public override void Write(Utf8JsonWriter writer, AzureKeyVaultOptions value, JsonSerializerOptions options) | ||
| { | ||
| JsonSerializer.Serialize(writer, value, options); | ||
| } | ||
| } | ||
| } |
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Maybe make the comment a bit more descriptive, to show that it can replace the variable with either AKV, an environment variable, or nothing during deserialization.