//----------------------------------------------------------------------------------------------- // private methods //----------------------------------------------------------------------------------------------- /// <summary> /// Written by Abhishek Kumar on March 05, 2007 /// purpose: to initiate the central Application Domain that /// all Grid Threads will be run on. /// /// Police and permissions will also be set. /// ADV: a crash in this App Domain(because of poor code in GThread) /// does not affect eduGRID's Framework i.e. the Alchemi executor is maintained steady even in error /// /// initially Alchemi created separate app domains for each Gthread it received. /// now, instead, we create 1 appdomain and run all gthreads on it /// the Bot Logic resides in this app domain. /// (this saves the overhead of initializing bot logic for every Gthread (or every query)) /// </summary> private void initialize_GridThreadExecutor() { if (GridThreadExecutor == null) { string appDir = GetApplicationDirectory(_CurTi.ApplicationId); AppDomainSetup info = new AppDomainSetup(); info.PrivateBinPath = appDir; GridThreadApplicationDomain = AppDomain.CreateDomain("Central_AppDomain", null, info); // *** // http://www.dotnetthis.com/Articles/DynamicSandboxing.htm PolicyLevel domainPolicy = PolicyLevel.CreateAppDomainLevel(); AllMembershipCondition allCodeMC = new AllMembershipCondition(); // TODO: 'FullTrust' in the following line needs to be replaced with something like 'AlchemiGridThread' // This permission set needs to be defined and set automatically as part of the installation. PermissionSet internetPermissionSet = domainPolicy.GetNamedPermissionSet("FullTrust"); PolicyStatement internetPolicyStatement = new PolicyStatement(internetPermissionSet); CodeGroup allCodeInternetCG = new UnionCodeGroup(allCodeMC, internetPolicyStatement); domainPolicy.RootCodeGroup = allCodeInternetCG; GridThreadApplicationDomain.SetAppDomainPolicy(domainPolicy); GridThreadExecutor = (AppDomainExecutor)GridThreadApplicationDomain.CreateInstanceFromAndUnwrap(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Alchemi.Executor.dll"), "Alchemi.Executor.AppDomainExecutor"); } if (!GridThreadExecutor.Initialized) { try { GridThreadExecutor.initialize(); } catch (Exception ex) { throw new Exception("Error during initialization of GridThreadExecutor"); } } }
//----------------------------------------------------------------------------------------------- /// <summary> /// Initialises a new instance of the GridAppDomain with the given AppDomain and AppDomainExecutor /// </summary> /// <param name="domain"></param> /// <param name="executor"></param> public GridAppDomain(AppDomain domain, AppDomainExecutor executor) { _Domain = domain; _Executor = executor; }
/// <summary> /// Initialises a new instance of the GridAppDomain with the given AppDomain and AppDomainExecutor /// </summary> /// <param name="domain"></param> /// <param name="executor"></param> internal GridAppDomain(AppDomain domain, AppDomainExecutor executor) { _Domain = domain; _Executor = executor; }
//----------------------------------------------------------------------------------------------- // private methods //----------------------------------------------------------------------------------------------- /// <summary> /// Written by Abhishek Kumar on March 05, 2007 /// purpose: to initiate the central Application Domain that /// all Grid Threads will be run on. /// /// Police and permissions will also be set. /// ADV: a crash in this App Domain(because of poor code in GThread) /// does not affect eduGRID's Framework i.e. the Alchemi executor is maintained steady even in error /// /// initially Alchemi created separate app domains for each Gthread it received. /// now, instead, we create 1 appdomain and run all gthreads on it /// the Bot Logic resides in this app domain. /// (this saves the overhead of initializing bot logic for every Gthread (or every query)) /// </summary> private void initialize_GridThreadExecutor() { if (GridThreadExecutor == null) { string appDir = GetApplicationDirectory(_CurTi.ApplicationId); AppDomainSetup info = new AppDomainSetup(); info.PrivateBinPath = appDir; GridThreadApplicationDomain = AppDomain.CreateDomain("Central_AppDomain", null, info); // *** // http://www.dotnetthis.com/Articles/DynamicSandboxing.htm PolicyLevel domainPolicy = PolicyLevel.CreateAppDomainLevel(); AllMembershipCondition allCodeMC = new AllMembershipCondition(); // TODO: 'FullTrust' in the following line needs to be replaced with something like 'AlchemiGridThread' // This permission set needs to be defined and set automatically as part of the installation. PermissionSet internetPermissionSet = domainPolicy.GetNamedPermissionSet("FullTrust"); PolicyStatement internetPolicyStatement = new PolicyStatement(internetPermissionSet); CodeGroup allCodeInternetCG = new UnionCodeGroup(allCodeMC, internetPolicyStatement); domainPolicy.RootCodeGroup = allCodeInternetCG; GridThreadApplicationDomain.SetAppDomainPolicy(domainPolicy); GridThreadExecutor = (AppDomainExecutor) GridThreadApplicationDomain.CreateInstanceFromAndUnwrap(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Alchemi.Executor.dll"), "Alchemi.Executor.AppDomainExecutor"); } if (!GridThreadExecutor.Initialized) { try { GridThreadExecutor.initialize(); } catch (Exception ex) { throw new Exception("Error during initialization of GridThreadExecutor"); } } }