105 lines
2.8 KiB
C#
105 lines
2.8 KiB
C#
/*
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* Copyright (c) 2018 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using SafeExamBrowser.Contracts.Behaviour.OperationModel;
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using SafeExamBrowser.Contracts.Communication;
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using SafeExamBrowser.Contracts.Configuration;
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using SafeExamBrowser.Contracts.Configuration.Settings;
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using SafeExamBrowser.Contracts.I18n;
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using SafeExamBrowser.Contracts.Logging;
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using SafeExamBrowser.Contracts.UserInterface;
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namespace SafeExamBrowser.Runtime.Behaviour.Operations
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{
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internal class ServiceConnectionOperation : IOperation
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{
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private bool connected, mandatory;
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private IConfigurationRepository configuration;
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private ILogger logger;
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private IServiceProxy service;
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private IText text;
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public IProgressIndicator ProgressIndicator { private get; set; }
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public ServiceConnectionOperation(IConfigurationRepository configuration, ILogger logger, IServiceProxy service, IText text)
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{
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this.configuration = configuration;
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this.service = service;
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this.logger = logger;
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this.text = text;
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}
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public OperationResult Perform()
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{
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logger.Info($"Initializing service connection...");
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ProgressIndicator?.UpdateText(TextKey.ProgressIndicator_InitializeServiceConnection);
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try
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{
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mandatory = configuration.CurrentSettings.ServicePolicy == ServicePolicy.Mandatory;
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connected = service.Connect();
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}
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catch (Exception e)
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{
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LogException(e);
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}
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if (mandatory && !connected)
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{
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logger.Error("Aborting startup because the service is mandatory but not available!");
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return OperationResult.Failed;
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}
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service.Ignore = !connected;
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logger.Info($"The service is {(mandatory ? "mandatory" : "optional")} and {(connected ? "available." : "not available. All service-related operations will be ignored!")}");
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return OperationResult.Success;
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}
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public OperationResult Repeat()
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{
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// TODO: Re-check if mandatory, if so, try to connect (if not connected) - otherwise, no action required (except maybe logging of status?)
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return OperationResult.Success;
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}
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public void Revert()
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{
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logger.Info("Closing service connection...");
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ProgressIndicator?.UpdateText(TextKey.ProgressIndicator_CloseServiceConnection);
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if (connected)
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{
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try
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{
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service.Disconnect();
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}
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catch (Exception e)
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{
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logger.Error("Failed to disconnect from the service!", e);
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}
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}
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}
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private void LogException(Exception e)
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{
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var message = "Failed to connect to the service component!";
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if (mandatory)
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{
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logger.Error(message, e);
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}
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else
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{
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logger.Info($"{message} Reason: {e.Message}");
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}
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}
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}
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}
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