/// <summary>
/// Retrives a compiled script.
///
/// The method check scripts in following order:
/// 1. Script Library database.
/// 2. Modified source file on the file system.
/// 3. Unmodified source file in precompiled WebPages.dll.
/// </summary>
/// <param name="sourceFile">Script source file.</param>
/// <param name="requestContext">The current HTTP context. Can be <c>null</c> in case of desktop app.</param>
/// <returns>The script type or a <B>null</B> reference on failure.</returns>
/// <remarks>The method do check the script library database.</remarks>
public ScriptInfo GetCompiledScript(PhpSourceFile/*!*/ sourceFile, RequestContext requestContext)
{
Debug.Assert(sourceFile != null);
// try to get the script from precompiled script library first
var scriptLibraryModule = applicationContext.ScriptLibraryDatabase.GetScriptModule(sourceFile.FullPath);
if (scriptLibraryModule != null)
return scriptLibraryModule.ScriptInfo;
// loads precompiled assembly if exists and not loaded yet:
GetPrecompiledAssembly();
// enables source code watcher if not enabled yet:
if (watcher != null && !watcher.EnableRaisingEvents)
{
Debug.WriteLine("WSSM", "Source code watcher is starting.");
watcher.EnableRaisingEvents = true;
}
string ns = ScriptModule.GetSubnamespace(sourceFile.RelativePath, false);
CacheEntry cache_entry;
if (Configuration.Application.Compiler.OnlyPrecompiledCode)
{
// Load script from cache (WebPages.dll)
if (TryGetCachedEntry(ns, out cache_entry))
return cache_entry.ScriptInfo;
else
return null;
}
else
{
// Load script from cache or from ASP.NET Temporary files
if (TryLoadCachedEntry(ns, sourceFile, out cache_entry))
return cache_entry.ScriptInfo;
lock (this)
{
// double checked lock, CompileScript should not be called on more threads
if (TryGetCachedEntry(ns, out cache_entry))
return cache_entry.ScriptInfo;
Debug.WriteLine("WSSM", "Compile script '{0}'.", sourceFile.ToString());
return CompileScriptNoLock(ns, sourceFile, requestContext);
}
}
}
