protected virtual async Task <WorkflowRules[]> GetFileSystemRulesAsync(Type type, CancellationToken cancellationToken = default)
{
var ruleId = GetRuleId(type);
var ruleFile = GetRuleName(type);
var fileInfo = FileProvider.GetFileInfo(ruleFile);
if (fileInfo != null && fileInfo.Exists)
{
// 规则文件监控
// TODO: 删除模块的规则缓存还需要删除RulesEngine中rulesCache已编译的规则缓存
ChangeToken.OnChange(
() => FileProvider.Watch(ruleFile),
(int ruleId) =>
{
RulesCache.Remove(ruleId);
}, ruleId);
// 打开文本流
using (var stream = fileInfo.CreateReadStream())
{
var result = new byte[stream.Length];
await stream.ReadAsync(result, 0, (int)stream.Length);
var ruleDsl = Encoding.UTF8.GetString(result);
// 解析
return(JsonSerializer.Deserialize <WorkflowRules[]>(ruleDsl));
}
}
return(new WorkflowRules[0]);
}
async Task <RulesCache> LoadRules(IRulesLoader rulesLoader)
{
RulesCache cache = new RulesCache(new Dictionary <string, RuleEngine>(), new Dictionary <string, string>());
StorageFolder appInstalledFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
StorageFolder rulesFolder = await appInstalledFolder.GetFolderAsync("Rules");
IReadOnlyList <StorageFile> files = await rulesFolder.GetFilesAsync();
Dictionary <string, StorageFile> rules = files.Where(f => f.Name.EndsWith(".module")).ToDictionary(f => Path.GetFileNameWithoutExtension(f.Name).ToLowerInvariant());
Dictionary <string, StorageFile> resources = files.Where(f => f.Name.EndsWith(".resources")).ToDictionary(f => Path.GetFileNameWithoutExtension(f.Name).ToLowerInvariant());
int count = 0;
foreach (string key in rules.Keys)
{
count++;
await SetProgressValue(((double)count / rules.Count) * 100);
rulesLoader.LoadRules(new RulesModuleModel {
Name = key, ResourceSetFile = GetBytes(resources[key]), RuleSetFile = GetBytes(rules[key])
}, cache);
}
return(cache);
}
private void _executeRulesEngine()
{
UpdateProgressList();
RuleEngine ruleEngine = RulesCache.GetRuleEngine(_moduleBeginName);
if (ruleEngine == null)
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Strings.moduleNotFoundFormat, _moduleBeginName));
}
ruleEngine.Execute(this.FlowActivity);
}
async Task <RulesCache> LoadRules(IRulesLoader rulesLoader)
{
RulesCache cache = new RulesCache(new ConcurrentDictionary <string, RuleEngine>(), new ConcurrentDictionary <string, string>());
var assembly = IntrospectionExtensions.GetTypeInfo(typeof(ExtendedSplashViewModel)).Assembly;
string[] uwpResources = GetResourceStrings(assembly);
Dictionary <string, string> rules = uwpResources
.Where(f => f.EndsWith(".module"))
.ToDictionary(f => GetKey(f).ToLowerInvariant());
Dictionary <string, string> resources = uwpResources
.Where(f => f.EndsWith(".resources"))
.ToDictionary(f => GetKey(f).ToLowerInvariant());
int count = 0;
DateTime dt = DateTime.Now;
await Task.WhenAll
(
rules.Keys.Select
(
key => LoadRules
(
new RulesModuleModel
{
Name = key,
ResourceSetFile = GetBytes(resources[key], assembly),
RuleSetFile = GetBytes(rules[key], assembly)
}
)
)
);
return(cache);
Task LoadRules(RulesModuleModel module)
{
return(Task.Run(() =>
{
rulesLoader.LoadRules(module, cache);
count++;
Progress = (double)count / rules.Count;
}));
}
string GetKey(string fullResourceName)
=> Path.GetExtension(Path.GetFileNameWithoutExtension(fullResourceName)).Substring(1);
}
private async Task <WorkflowRules[]> GetCachedRulesAsync(Type type, CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
var ruleId = GetRuleId(type);
return(await RulesCache.GetOrCreateAsync(ruleId,
async (entry) =>
{
entry.SetAbsoluteExpiration(TimeSpan.FromMinutes(30));
return await GetFileSystemRulesAsync(type, cancellationToken);
}));
}
private void _startInitialFlow(string module)
{
if (string.IsNullOrEmpty(module))
{
throw new ArgumentException(Strings.ruleSetCannotBeNull);
}
ClearFlowVariables();
UpdateProgressList(module);
RuleEngine ruleEngine = RulesCache.GetRuleEngine(module);
if (ruleEngine == null)
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Strings.moduleNotFoundFormat, module));
}
ruleEngine.Execute(this.FlowActivity);
}
