private CompiledQuery GetOrAdd(
Expression query,
QueryContext queryContext,
IDataStore dataStore,
bool isAsync,
Func <Expression, IDataStore, CompiledQuery> compiler)
{
var parameterizedQuery
= ParameterExtractingExpressionTreeVisitor
.ExtractParameters(query, queryContext);
var cacheKey
= dataStore.Model.GetHashCode().ToString()
+ isAsync
+ new ExpressionStringBuilder()
.Build(query);
CompiledQuery compiledQuery;
lock (_compiledQueryLockObject)
{
if (!_memoryCache.TryGetValue(cacheKey, out compiledQuery))
{
compiledQuery = compiler(parameterizedQuery, dataStore);
_memoryCache.Set(cacheKey, compiledQuery);
}
}
return(compiledQuery);
}
public static Expression ExtractParameters(Expression expressionTree, QueryContext queryContext)
{
var partialEvaluationInfo = EvaluatableTreeFindingExpressionTreeVisitor.Analyze(expressionTree);
var visitor = new ParameterExtractingExpressionTreeVisitor(partialEvaluationInfo, queryContext);
return(visitor.VisitExpression(expressionTree));
}
private CompiledQuery GetOrAdd(
Expression query,
QueryContext queryContext,
IDataStore dataStore,
bool isAsync,
Func <Expression, IDataStore, CompiledQuery> compiler)
{
var parameterizedQuery
= ParameterExtractingExpressionTreeVisitor
.ExtractParameters(query, queryContext);
var cacheKey
= dataStore.Model.GetHashCode().ToString()
+ isAsync
+ new ExpressionStringBuilder()
.Build(query);
var compiledQuery
= _memoryCache.GetOrSet(
cacheKey,
Tuple.Create(parameterizedQuery, dataStore),
c =>
{
var tuple = (Tuple <Expression, IDataStore>)c.State;
return(compiler(tuple.Item1, tuple.Item2));
});
return(compiledQuery);
}
