private void CompileScript(ScriptEvaluator scriptEval)
{
if (scriptEval.Evaluators == null)
{
lock (scriptEval)
{
if (scriptEval.Evaluators == null)
{
ExpressionEvaluator[] evaluators = CreateExpressionEvaluators(scriptEval.Script);
scriptEval.SetExpressionEvaluators(evaluators);
}
}
}
}
private object GetPreEvalDetails(object entity, ScriptEvaluator evaluator)
{
if (_logger.IsEnabled(LogLevel.Trace))
{
return(new
{
PreEvalValues = entity,
Script = evaluator.Script.Expressions
.OrderBy(e => e.Sequence)
.Select(e => new { e.AttributeName, e.Expression })
});
}
return(new { });
}
private async Task ExecuteScript(object entity, ScriptEvaluator evaluator)
{
var preEvalDetails = GetPreEvalDetails(entity, evaluator);
using (var durationLogger = _logger.LogTraceDuration(ScriptingLogEvents.SCRIPT_EVALUATION, "Script Evaluation"))
{
durationLogger.Log.LogTraceDetails(ScriptingLogEvents.SCRIPT_PRE_EVALUATION,
"Pre-Evaluation Details", preEvalDetails);
CompileScript(evaluator);
SetDefaultAttributeValues(evaluator.Script, entity);
await evaluator.ExecuteAsync(entity);
durationLogger.Log.LogTraceDetails(ScriptingLogEvents.SCRIPT_POST_EVALUATION,
"Post-Evaluation Details", new { PostEvalValues = entity });
}
}
public async Task ExecuteAsync(object entity, string scriptName = "default")
{
Check.NotNull(entity, nameof(entity));
Check.NotNull(scriptName, nameof(scriptName));
Type entityType = entity.GetType();
IEnumerable <ScriptEvaluator> scripts = _scriptEvaluators[entityType];
if (!scripts.Any())
{
return;
}
// Execute the default script if specified.
var defaultEvalScript = scripts.FirstOrDefault(se => se.IsDefault);
if (defaultEvalScript != null)
{
await ExecuteScript(entity, defaultEvalScript);
}
// Execute script with a specified name.
if (scriptName != ScriptEvaluator.DEFAULT_SCRIPT_NAME)
{
ScriptEvaluator namedEvalScript = scripts.FirstOrDefault(se => se.Script.Name == scriptName);
if (namedEvalScript == null)
{
throw new InvalidOperationException(
$"A script named: {scriptName} for the entity type of: {entityType} could not be found. " +
$"Script names are case-sensitive.");
}
await ExecuteScript(entity, namedEvalScript);
}
}
