private string GetCacheFileName(DslEngine engine, string[] urls)
{
string fileName = storage.GetChecksumForUrls(engine.GetType(), urls) + ".boocache";
string engineName = engine.EngineName;
if (engineName != null)
{
fileName = string.Format("{0}_{1}", engineName, fileName);
}
return Path.Combine(Path.GetTempPath(), fileName);
}
private string[] GetUrlsFromDslEngine(DslEngine engine, ref string path)
{
string[] matchingUrls = engine.Storage.GetMatchingUrlsIn(BaseDirectory, ref path);
List <string> urls = new List <string>(matchingUrls ?? new string[0]);
// even if the path is in the cache, we still return the it
// so we will get a new version
if (urls.Exists(GetMatchPathPredicate(path)) == false &&
engine.Storage.IsValidScriptUrl(path))
{
urls.Add(path);
}
return(urls.ToArray());
}
/// <summary>
/// Creates instances of all the DSL that are located directly under the parent URL.
/// </summary>
/// <typeparam name="TDslBase">The type of the DSL base.</typeparam>
/// <param name="parentUrl">The parent URL.</param>
/// <param name="parameters">The parameters.</param>
/// <returns></returns>
public TDslBase[] CreateAll <TDslBase>(string parentUrl, params object[] parameters)
{
DslEngine engine = GetEngine <TDslBase>();
List <TDslBase> instances = new List <TDslBase>();
engine.Cache.ReadLock(delegate
{
foreach (string dsl in GetUrlsFromDslEngine(engine, ref parentUrl))
{
instances.Add(Create <TDslBase>(dsl, parameters));
}
});
return(instances.ToArray());
}
private TDslBase CreateInternal <TDslBase>(ScriptNotFoundBehavior notFoundBehavior, string url, object[] parameters)
{
DslEngine engine = GetEngine <TDslBase>();
Type type = null;
engine.Cache.ReadLock(delegate
{
type = engine.Cache.Get(engine.CanonizeUrl(url));
if (type == null)
{
bool recompilation;
string[] urls = GetUrls(engine, ref url, out recompilation);
bool existsInArray = engine.Storage.IsUrlIncludeIn(urls, BaseDirectory, url);
if (existsInArray == false)
{
if (notFoundBehavior == ScriptNotFoundBehavior.Throw)
{
throw new InvalidOperationException("Could not find DSL script: " + url);
}
return;
}
CompilerContext compilerContext;
try
{
compilerContext = engine.Compile(urls);
}
catch (Exception)
{
// if we fail to compile with batch, we will try just the current url
urls = new string[] { url };
compilerContext = engine.Compile(urls);
}
Assembly assembly = compilerContext.GeneratedAssembly;
RegisterBatchInCache(engine, urls, assembly);
//find the type that we searched for
//we may have a race condition with the cache, so we force
//it to go through the assemly instead of the cache
type = engine.GetTypeForUrl(assembly, url);
RaiseCompilationEvent(recompilation);
}
});
if (type == null)
{
return(default(TDslBase));
}
return((TDslBase)engine.CreateInstance(type, parameters));
}
/// <summary>
/// Returns cached instance if any, or null if none
/// </summary>
/// <param name="engine"></param>
/// <param name="urls"></param>
/// <returns></returns>
public CompilerContext GetCached(DslEngine engine, string[] urls)
{
if (urls == null || urls.Length == 0) throw new ArgumentNullException("urls");
string cacheFileName = GetCacheFileName(engine, urls);
CompilerContext context = LoadCompilerContext(cacheFileName);
if (context == null)
{
context = engine.ForceCompile(urls,cacheFileName);
WriteLock(delegate
{
assemblyCache[cacheFileName] = context.GeneratedAssembly;
AssemblyLoaded(cacheFileName, context.GeneratedAssembly, false);
});
}
return context;
}
private string[] GetUrls(DslEngine engine, ref string url, out bool recompilation)
{
string[] urls;
// we need to compile this separatedly, instead of
// in a batch. This is usually happening when a script
// has changed
recompilation = false;
if (standAloneCompilation.Contains(url))
{
standAloneCompilation.Remove(url);
urls = new string[] { url };
recompilation = true;
}
else
{
urls = GetUrlsFromDslEngine(engine, ref url);
}
return(urls);
}
private void RegisterBatchInCache(DslEngine engine, IEnumerable <string> urls, Assembly compiledAssembly)
{
engine.Cache.WriteLock(delegate
{
foreach (string batchUrl in urls)
{
Type type = engine.GetTypeForUrl(compiledAssembly, batchUrl);
if (type == null)
{
throw new InvalidOperationException("Could not find the generated type for: " + batchUrl);
}
engine.Cache.Set(batchUrl, type);
}
engine.Storage.NotifyOnChange(urls, delegate(string invalidatedUrl)
{
engine.Cache.Remove(invalidatedUrl);
standAloneCompilation.Add(invalidatedUrl);
});
});
}
/// <summary>
/// Returns cached instance if any, or null if none
/// </summary>
/// <param name="engine"></param>
/// <param name="urls"></param>
/// <returns></returns>
public CompilerContext GetCached(DslEngine engine, string[] urls)
{
if (urls == null || urls.Length == 0)
{
throw new ArgumentNullException("urls");
}
string cacheFileName = GetCacheFileName(engine, urls);
CompilerContext context = LoadCompilerContext(cacheFileName);
if (context == null)
{
context = engine.ForceCompile(urls, cacheFileName);
WriteLock(delegate
{
assemblyCache[cacheFileName] = context.GeneratedAssembly;
AssemblyLoaded(cacheFileName, context.GeneratedAssembly, false);
});
}
return(context);
}
private string GetCacheFileName(DslEngine engine, string[] urls)
{
string fileName = storage.GetChecksumForUrls(engine.GetType(), urls) + ".boocache";
return Path.Combine(Path.GetTempPath(), fileName);
}
///<summary>
/// Register a new DSL engine that is tied to a specific base type
///</summary>
public void Register <TDslBase>(DslEngine engine)
{
typeToDslEngine.Add(typeof(TDslBase), engine);
}
private string GetCacheFileName(DslEngine engine, string[] urls)
{
string fileName = storage.GetChecksumForUrls(engine.GetType(), urls) + ".boocache";
return(Path.Combine(Path.GetTempPath(), fileName));
}
