/// <summary>
/// Creates a new JavaScript Runtime.
/// </summary>
/// <param name="attributes"></param>
/// <returns></returns>
public BaristaRuntime CreateRuntime(JavaScriptRuntimeAttributes attributes = JavaScriptRuntimeAttributes.None)
{
var contextService = m_serviceProvider.GetRequiredService <IBaristaContextFactory>();
var runtimeHandle = m_engine.JsCreateRuntime(attributes, null);
var result = m_runtimePool.GetOrAdd(runtimeHandle, () => {
var rt = new BaristaRuntime(m_engine, contextService, runtimeHandle);
//Do not wire up a runtime's BeforeCollect handler with the factory as this will
//remove and dispose of the runtime on ANY garbage collect, which will eventually
//crash the engine.
//After a runtime handle is disposed, remove the handle from the pool.
void afterDispose(object sender, EventArgs args)
{
rt.AfterDispose -= afterDispose;
m_runtimePool.RemoveHandle(runtimeHandle);
}
rt.AfterDispose += afterDispose;
return(rt);
});
if (result == null)
{
throw new InvalidOperationException("Unable to create or retrieve a new Barista Runtime.");
}
return(result);
}
public BaristaContext CreateContext(BaristaRuntime runtime)
{
if (runtime == null)
{
throw new ArgumentNullException(nameof(runtime));
}
if (runtime.IsDisposed)
{
throw new ObjectDisposedException(nameof(runtime));
}
var contextHandle = m_engine.JsCreateContext(runtime.Handle);
return(m_contextPool.GetOrAdd(contextHandle, () =>
{
var moduleRecordFactory = m_serviceProvider.GetRequiredService <IBaristaModuleRecordFactory>();
var valueFactoryBuilder = m_serviceProvider.GetRequiredService <IBaristaValueFactoryBuilder>();
var conversionStrategy = m_serviceProvider.GetRequiredService <IBaristaConversionStrategy>();
//For flexability, a promise task queue is not required.
var promiseTaskQueue = m_serviceProvider.GetService <IPromiseTaskQueue>();
//Set the handle that will be called prior to the engine collecting the context.
var context = new BaristaContext(m_engine, valueFactoryBuilder, conversionStrategy, moduleRecordFactory, promiseTaskQueue, contextHandle);
void beforeCollect(object sender, BaristaObjectBeforeCollectEventArgs args)
{
context.BeforeCollect -= beforeCollect;
m_contextPool.RemoveHandle(new JavaScriptContextSafeHandle(args.Handle));
}
context.BeforeCollect += beforeCollect;
return context;
}));
}
