private string ExecuteHandler(
IntPtr commandHandlerHandle, string json, string[] other, out string newSharedState)
{
_reverseCommandHandlerException = null;
_prelude.ScheduleTerminateExecution();
IntPtr resultJsonPtr;
IntPtr result2JsonPtr;
IntPtr memoryHandle;
bool success = Js1.ExecuteCommandHandler(
_script.GetHandle(), commandHandlerHandle, json, other, other != null ? other.Length : 0,
out resultJsonPtr, out result2JsonPtr, out memoryHandle);
var terminated = _prelude.CancelTerminateExecution();
if (!success)
{
CompiledScript.CheckResult(_script.GetHandle(), terminated, disposeScriptOnException: false);
}
string resultJson = Marshal.PtrToStringUni(resultJsonPtr);
string result2Json = Marshal.PtrToStringUni(result2JsonPtr);
Js1.FreeResult(memoryHandle);
if (_reverseCommandHandlerException != null)
{
throw new ApplicationException(
"An exception occurred while executing a reverse command handler. "
+ _reverseCommandHandlerException.Message, _reverseCommandHandlerException);
}
newSharedState = result2Json;
return(resultJson);
}
private CompiledScript CompileScript(string script, string fileName)
{
IntPtr prelude = Js1.CompilePrelude(script, fileName, _loadModuleDelegate, _logDelegate);
CompiledScript.CheckResult(prelude, disposeScriptOnException: true);
return(new CompiledScript(prelude, fileName));
}
private CompiledScript CompileScript(PreludeScript prelude, string script, string fileName)
{
IntPtr query = Js1.CompileQuery(
prelude.GetHandle(), script, fileName, _commandHandlerRegisteredCallback, _reverseCommandHandlerDelegate);
CompiledScript.CheckResult(query, disposeScriptOnException: true);
return(new CompiledScript(query, fileName));
}
private CompiledScript CompileScript(string script, string fileName)
{
ScheduleTerminateExecution();
IntPtr prelude = Js1.CompilePrelude(
script, fileName, _loadModuleDelegate, _enterCancellableRegion, _exitCancellableRegion, _logDelegate);
CancelTerminateExecution();
CompiledScript.CheckResult(prelude, false, disposeScriptOnException: true);
return(new CompiledScript(prelude, fileName));
}
private CompiledScript CompileScript(PreludeScript prelude, string script, string fileName)
{
prelude.ScheduleTerminateExecution();
IntPtr query = Js1.CompileQuery(
prelude.GetHandle(), script, fileName, _commandHandlerRegisteredCallback, _reverseCommandHandlerDelegate);
var terminated = prelude.CancelTerminateExecution();
CompiledScript.CheckResult(query, terminated, disposeScriptOnException: true);
return(new CompiledScript(query, fileName));
}
private void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
var scriptHandle = _script;
_script = IntPtr.Zero;
Js1.DisposeScript(scriptHandle);
_disposed = true;
}
private string ExecuteHandler(IntPtr commandHandlerHandle, string json, string[] other = null)
{
IntPtr resultJsonPtr;
IntPtr resultHandle = Js1.ExecuteCommandHandler(
_script.GetHandle(), commandHandlerHandle, json, other, other != null ? other.Length : 0,
out resultJsonPtr);
if (resultHandle == IntPtr.Zero)
{
CompiledScript.CheckResult(_script.GetHandle(), disposeScriptOnException: false);
}
string resultJson = Marshal.PtrToStringUni(resultJsonPtr);
Js1.FreeResult(resultHandle);
return(resultJson);
}
private IntPtr GetModule(string moduleName)
{
try
{
var moduleSourceAndFileName = GetModuleSourceAndFileName(moduleName);
var compiledModuleHandle = Js1.CompileModule(
GetHandle(), moduleSourceAndFileName.Item1, moduleSourceAndFileName.Item2);
CompiledScript.CheckResult(compiledModuleHandle, disposeScriptOnException: true);
var compiledModule = new CompiledScript(compiledModuleHandle, moduleSourceAndFileName.Item2);
_modules.Add(compiledModule);
return(compiledModuleHandle);
}
catch (Exception)
{
//TODO: this is not a good way to report missing module and other exceptions back to caller
return(IntPtr.Zero);
}
}
private CompiledScript CompileScript(string script, string fileName)
{
try
{
var attempts = 3;
var prelude = default(IntPtr);
do
{
attempts--;
try
{
ScheduleTerminateExecution();
prelude = Js1.CompilePrelude(
script, fileName, _loadModuleDelegate, _enterCancellableRegion, _exitCancellableRegion,
_logDelegate);
CancelTerminateExecution();
CompiledScript.CheckResult(prelude, false, disposeScriptOnException: true);
}
catch (Js1Exception ex)
{
if (attempts > 0 && (ex.ErrorCode == -1 || ex.ErrorCode == -2))
{
// timeouts
Thread.Sleep(2000);
}
else
{
throw;
}
}
} while (prelude == default(IntPtr));
return(new CompiledScript(prelude));
}
catch (DllNotFoundException ex)
{
Log.Info("{0}\n{1}\n{2}", ex.ToString(), ex.Message, ex.StackTrace);
throw new ApplicationException(
"The projection subsystem failed to load a libjs1.so/js1.dll/... or one of its dependencies. The original error message is: "
+ ex.Message, ex);
}
}
private IntPtr GetModule(IntPtr prelude, string moduleName)
{
try {
var moduleSourceAndFileName = GetModuleSourceAndFileName(moduleName);
// NOTE: no need to schedule termination; modules are loaded only in context
if (_cancelTokenOrStatus == NonScheduled)
{
throw new InvalidOperationException("Requires scheduled terminate execution");
}
var compiledModuleHandle = Js1.CompileModule(
prelude, moduleSourceAndFileName.Item1, moduleSourceAndFileName.Item2);
CompiledScript.CheckResult(compiledModuleHandle, terminated: false, disposeScriptOnException: true);
var compiledModule = new CompiledScript(compiledModuleHandle);
_modules.Add(compiledModule);
return(compiledModuleHandle);
} catch (Exception ex) {
Log.Error(ex, "Cannot load module '{module}'", moduleName);
//TODO: this is not a good way to report missing module and other exceptions back to caller
return(IntPtr.Zero);
}
}
public static void CheckResult(IntPtr scriptHandle, bool terminated, bool disposeScriptOnException)
{
if (terminated)
{
throw new Js1Exception(
-2, "Failed to compile script. Script execution terminated. Timeout expired. (1)");
}
if (scriptHandle == IntPtr.Zero)
{
throw new Js1Exception(
-1, "Failed to compile script. Script execution terminated. Timeout expired. (2)");
}
int? errorCode = null;
string errorMessage = null;
_reportErrorCallback =
// NOTE: this local delegate must go to a field to keep references while ReportErrors is being executed
(code, message) => {
//NOTE: do not throw exceptions directly in this handler
// let the CPP code clean up
errorCode = code;
errorMessage = message;
};
Js1.ReportErrors(scriptHandle, _reportErrorCallback);
if (errorCode != null)
{
if (disposeScriptOnException)
{
Js1.DisposeScript(scriptHandle);
}
if (errorCode == 2)
{
throw new Js1Exception(
errorCode.Value,
"Failed to compile script. Script execution terminated. Timeout expired. (3)");
}
throw new Js1Exception(errorCode.Value, errorMessage);
}
}
private string ExecuteHandler(IntPtr commandHandlerHandle, string json, string[] other = null)
{
_reverseCommandHandlerException = null;
IntPtr resultJsonPtr;
IntPtr resultHandle = Js1.ExecuteCommandHandler(
_script.GetHandle(), commandHandlerHandle, json, other, other != null ? other.Length : 0,
out resultJsonPtr);
if (resultHandle == IntPtr.Zero)
{
CompiledScript.CheckResult(_script.GetHandle(), disposeScriptOnException: false);
}
//TODO: do we need to free resulktJsonPtr in case of exception thrown a line above
string resultJson = Marshal.PtrToStringUni(resultJsonPtr);
Js1.FreeResult(resultHandle);
if (_reverseCommandHandlerException != null)
{
throw new ApplicationException(
"An exception occurred while executing a reverse command handler. " + _reverseCommandHandlerException.Message,
_reverseCommandHandlerException);
}
return(resultJson);
}
public static void CheckResult(IntPtr scriptHandle, bool disposeScriptOnException)
{
int? errorCode = null;
string errorMessage = null;
_reportErrorCallback =
// NOTE: this local delegate must go to a field to keep references while ReportErrors is being executed
(code, message) =>
{
//NOTE: do not throw exceptions directly in this handler
// let the CPP code clean up
errorCode = code;
errorMessage = message;
};
Js1.ReportErrors(scriptHandle, _reportErrorCallback);
if (errorCode != null)
{
if (disposeScriptOnException)
{
Js1.DisposeScript(scriptHandle);
}
throw new Js1Exception(errorCode.Value, errorMessage);
}
}
private void CancelExecution(IntPtr scriptHandle)
{
Js1.TerminateExecution(scriptHandle);
}
