/// <summary>
/// Prepares a Lua script with named parameters to be run against any Redis instance.
/// </summary>
/// <param name="script">The script to prepare.</param>
public static LuaScript Prepare(string script)
{
LuaScript ret;
if (!Cache.TryGetValue(script, out WeakReference weakRef) || (ret = (LuaScript)weakRef.Target) == null)
{
ret = ScriptParameterMapper.PrepareScript(script);
Cache[script] = new WeakReference(ret);
}
return(ret);
}
internal void ExtractParameters(object ps, RedisKey?keyPrefix, out RedisKey[] keys, out RedisValue[] args)
{
if (HasArguments)
{
if (ps == null)
{
throw new ArgumentNullException(nameof(ps), "Script requires parameters");
}
var psType = ps.GetType();
var mapper = (Func <object, RedisKey?, ScriptParameterMapper.ScriptParameters>)ParameterMappers[psType];
if (ps != null && mapper == null)
{
lock (ParameterMappers)
{
mapper = (Func <object, RedisKey?, ScriptParameterMapper.ScriptParameters>)ParameterMappers[psType];
if (mapper == null)
{
string missingMember;
string badMemberType;
if (!ScriptParameterMapper.IsValidParameterHash(psType, this, out missingMember, out badMemberType))
{
if (missingMember != null)
{
throw new ArgumentException("ps", "Expected [" + missingMember + "] to be a field or gettable property on [" + psType.FullName + "]");
}
throw new ArgumentException("ps", "Expected [" + badMemberType + "] on [" + psType.FullName + "] to be convertable to a RedisValue");
}
ParameterMappers[psType] = mapper = ScriptParameterMapper.GetParameterExtractor(psType, this);
}
}
}
var mapped = mapper(ps, keyPrefix);
keys = mapped.Keys;
args = mapped.Arguments;
}
else
{
keys = null;
args = null;
}
}