47 lines
2.0 KiB
C#
47 lines
2.0 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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namespace Microsoft.AspNetCore.SignalR.Protocol
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{
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public class CompletionMessage : HubInvocationMessage
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{
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public string Error { get; }
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public object Result { get; }
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public bool HasResult { get; }
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public CompletionMessage(string invocationId, string error, object result, bool hasResult)
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: base(invocationId)
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{
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if (error != null && result != null)
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{
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throw new ArgumentException($"Expected either '{nameof(error)}' or '{nameof(result)}' to be provided, but not both");
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}
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Error = error;
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Result = result;
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HasResult = hasResult;
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}
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public override string ToString()
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{
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var errorStr = Error == null ? "<<null>>" : $"\"{Error}\"";
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var resultField = HasResult ? $", {nameof(Result)}: {Result ?? "<<null>>"}" : string.Empty;
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return $"Completion {{ {nameof(InvocationId)}: \"{InvocationId}\", {nameof(Error)}: {errorStr}{resultField} }}";
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}
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// Static factory methods. Don't want to use constructor overloading because it will break down
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// if you need to send a payload statically-typed as a string. And because a static factory is clearer here
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public static CompletionMessage WithError(string invocationId, string error)
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=> new CompletionMessage(invocationId, error, result: null, hasResult: false);
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public static CompletionMessage WithResult(string invocationId, object payload)
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=> new CompletionMessage(invocationId, error: null, result: payload, hasResult: true);
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public static CompletionMessage Empty(string invocationId)
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=> new CompletionMessage(invocationId, error: null, result: null, hasResult: false);
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}
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}
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