/// <summary>
/// Start the requester with any unsent URIs from the last application run.
/// </summary>
/// <returns>Task that completes when the requester is ready.</returns>
private static async Task StartRequesterAsync()
{
requester = new BackgroundHttpClientRequester(PreprocessHttpRequest, IsInternetAvailable);
var previousRequests = await LocalFolderContractSerializer <List <Uri> > .RestoreAsync(RequestQueueFileName);
requester.Start(lastUploadInterval, previousRequests);
}
/// <summary>
/// Suspend the requester and preserve any unsent URIs.
/// </summary>
/// <returns>Task that completes when the requester has been suspended.</returns>
private static async Task SuspendRequesterAsync()
{
var recentRequestsToPersist = new List <Uri>();
if (requester.IsStarted)
{
var pendingRequests = await requester.StopAsync();
recentRequestsToPersist = pendingRequests.Skip(pendingRequests.Count - MaximumRequestsToPersist).ToList();
}
await LocalFolderContractSerializer <List <Uri> > .SaveAsync(recentRequestsToPersist, RequestQueueFileName);
await SaveSessionState(sessionManager.GetState());
}
/// <summary>
/// Save the session state to preserve state between application launches.
/// </summary>
/// <returns>Task that completes when the session state has been saved.</returns>
protected override async Task Save <T>(T data, string name)
{
await LocalFolderContractSerializer <T> .SaveAsync(data, name);
}
/// <summary>
/// Load the session state from storage if it exists, null if it does not.
/// </summary>
/// <returns>Task that completes when the SessionState is available.</returns>
protected override async Task <T> Load <T>(string name)
{
return(await LocalFolderContractSerializer <T> .RestoreAsync(name));
}
/// <summary>
/// Save the session state to preserve state between application launches.
/// </summary>
/// <returns>Task that completes when the session state has been saved.</returns>
private static async Task SaveSessionState(SessionState sessionState)
{
await LocalFolderContractSerializer <SessionState> .SaveAsync(sessionState, SessionStateFileName);
}
/// <summary>
/// Load the session state from storage if it exists, null if it does not.
/// </summary>
/// <returns>Task that completes when the SessionState is available.</returns>
private static async Task <SessionState> LoadSessionState()
{
return(await LocalFolderContractSerializer <SessionState> .RestoreAsync(SessionStateFileName));
}