/// <summary>
/// Factory for deserialization.
/// </summary>
internal static INodePacket FactoryForDeserialization(ITranslator translator)
{
TaskHostConfiguration configuration = new TaskHostConfiguration();
configuration.Translate(translator);
return(configuration);
}
/// <summary>
/// Instantiates a new MSBuild or MSBuildTaskHost process acting as a child node.
/// </summary>
internal bool CreateNode(HandshakeOptions hostContext, INodePacketFactory factory, INodePacketHandler handler, TaskHostConfiguration configuration)
{
ErrorUtilities.VerifyThrowArgumentNull(factory, "factory");
ErrorUtilities.VerifyThrow(!_nodeIdToPacketFactory.ContainsKey((int)hostContext), "We should not already have a factory for this context! Did we forget to call DisconnectFromHost somewhere?");
if (AvailableNodes == 0)
{
ErrorUtilities.ThrowInternalError("All allowable nodes already created ({0}).", _nodeContexts.Count);
return(false);
}
// Start the new process. We pass in a node mode with a node number of 2, to indicate that we
// want to start up an MSBuild task host node.
string commandLineArgs = $" /nologo /nodemode:2 /nodereuse:{ComponentHost.BuildParameters.EnableNodeReuse} ";
string msbuildLocation = GetMSBuildLocationFromHostContext(hostContext);
// we couldn't even figure out the location we're trying to launch ... just go ahead and fail.
if (msbuildLocation == null)
{
return(false);
}
CommunicationsUtilities.Trace("For a host context of {0}, spawning executable from {1}.", hostContext.ToString(), msbuildLocation ?? "MSBuild.exe");
// Make it here.
NodeContext context = GetNode
(
msbuildLocation,
commandLineArgs,
(int)hostContext,
this,
CommunicationsUtilities.GetHostHandshake(hostContext),
CommunicationsUtilities.GetClientHandshake(hostContext),
NodeContextTerminated
);
if (null != context)
{
_nodeContexts[hostContext] = context;
// Start the asynchronous read.
context.BeginAsyncPacketRead();
_activeNodes.Add((int)hostContext);
_noNodesActiveEvent.Reset();
return(true);
}
return(false);
}
/// <summary>
/// Make sure a node in the requested context exists.
/// </summary>
internal bool AcquireAndSetUpHost(HandshakeOptions hostContext, INodePacketFactory factory, INodePacketHandler handler, TaskHostConfiguration configuration)
{
NodeContext context = null;
bool nodeCreationSucceeded = false;
if (!(_nodeContexts.TryGetValue(hostContext, out context)))
{
nodeCreationSucceeded = CreateNode(hostContext, factory, handler, configuration);
}
else
{
// node already exists, so "creation" automatically succeeded
nodeCreationSucceeded = true;
}
if (nodeCreationSucceeded)
{
context = _nodeContexts[hostContext];
_nodeIdToPacketFactory[(int)hostContext] = factory;
_nodeIdToPacketHandler[(int)hostContext] = handler;
// Configure the node.
context.SendData(configuration);
return(true);
}
return(false);
}
/// <summary>
/// Executes the task.
/// </summary>
public bool Execute()
{
// log that we are about to spawn the task host
string runtime = _taskHostParameters[XMakeAttributes.runtime];
string architecture = _taskHostParameters[XMakeAttributes.architecture];
_taskLoggingContext.LogComment(MessageImportance.Low, "ExecutingTaskInTaskHost", _taskType.Type.Name, _taskType.Assembly.AssemblyLocation, runtime, architecture);
// set up the node
lock (_taskHostLock)
{
_taskHostProvider = (NodeProviderOutOfProcTaskHost)_buildComponentHost.GetComponent(BuildComponentType.OutOfProcTaskHostNodeProvider);
ErrorUtilities.VerifyThrowInternalNull(_taskHostProvider, "taskHostProvider");
}
TaskHostConfiguration hostConfiguration =
new TaskHostConfiguration
(
_buildComponentHost.BuildParameters.NodeId,
NativeMethodsShared.GetCurrentDirectory(),
CommunicationsUtilities.GetEnvironmentVariables(),
_buildComponentHost.BuildParameters.Culture,
_buildComponentHost.BuildParameters.UICulture,
#if FEATURE_APPDOMAIN
_appDomainSetup,
#endif
BuildEngine.LineNumberOfTaskNode,
BuildEngine.ColumnNumberOfTaskNode,
BuildEngine.ProjectFileOfTaskNode,
BuildEngine.ContinueOnError,
_taskType.Type.FullName,
AssemblyUtilities.GetAssemblyLocation(_taskType.Type.GetTypeInfo().Assembly),
_setParameters,
new Dictionary <string, string>(_buildComponentHost.BuildParameters.GlobalProperties)
);
try
{
lock (_taskHostLock)
{
_requiredContext = CommunicationsUtilities.GetHandshakeOptions(taskHost: true, taskHostParameters: _taskHostParameters);
_connectedToTaskHost = _taskHostProvider.AcquireAndSetUpHost(_requiredContext, this, this, hostConfiguration);
}
if (_connectedToTaskHost)
{
try
{
bool taskFinished = false;
while (!taskFinished)
{
_packetReceivedEvent.WaitOne();
INodePacket packet = null;
// Handle the packet that's coming in
while (_receivedPackets.TryDequeue(out packet))
{
if (packet != null)
{
HandlePacket(packet, out taskFinished);
}
}
}
}
finally
{
lock (_taskHostLock)
{
_taskHostProvider.DisconnectFromHost(_requiredContext);
_connectedToTaskHost = false;
}
}
}
else
{
LogErrorUnableToCreateTaskHost(_requiredContext, runtime, architecture, null);
}
}
catch (BuildAbortedException)
{
LogErrorUnableToCreateTaskHost(_requiredContext, runtime, architecture, null);
}
catch (NodeFailedToLaunchException e)
{
LogErrorUnableToCreateTaskHost(_requiredContext, runtime, architecture, e);
}
return(_taskExecutionSucceeded);
}