/// <summary>
/// Executes the custom runtime task component to process the input message and returns the result message.
/// </summary>
/// <param name="pContext">A reference to <see cref="Microsoft.BizTalk.Component.Interop.IPipelineContext"/> object that contains the current pipeline context.</param>
/// <param name="pInMsg">A reference to <see cref="Microsoft.BizTalk.Message.Interop.IBaseMessage"/> object that contains the message to process.</param>
/// <returns>A reference to the returned <see cref="Microsoft.BizTalk.Message.Interop.IBaseMessage"/> object which will contain the output message.</returns>
public IBaseMessage Execute(IPipelineContext pContext, IBaseMessage pInMsg)
{
Guard.ArgumentNotNull(pContext, "pContext");
Guard.ArgumentNotNull(pInMsg, "pInMsg");
var callToken = TraceManager.PipelineComponent.TraceIn();
// It is OK to load the entire message into XML DOM. The size of these requests is anticipated to be very small.
XDocument request = XDocument.Load(pInMsg.BodyPart.GetOriginalDataStream());
string transformName = (from childNode in request.Root.Descendants() where childNode.Name.LocalName == WellKnownContractMember.MessageParameters.TransformName select childNode.Value).FirstOrDefault <string>();
TraceManager.PipelineComponent.TraceInfo(TraceLogMessages.GetXslTransformRequest, transformName);
IBaseMessagePart responsePart = BizTalkUtility.CreateResponsePart(pContext.GetMessageFactory(), pInMsg);
XmlWriterSettings settings = new XmlWriterSettings();
MemoryStream dataStream = new MemoryStream();
pContext.ResourceTracker.AddResource(dataStream);
settings.CloseOutput = false;
settings.CheckCharacters = false;
settings.ConformanceLevel = ConformanceLevel.Fragment;
settings.NamespaceHandling = NamespaceHandling.OmitDuplicates;
using (XmlWriter responseWriter = XmlWriter.Create(dataStream, settings))
{
responseWriter.WriteResponseStartElement("r", WellKnownContractMember.MethodNames.GetXslTransformMetadata, WellKnownNamespace.ServiceContracts.General);
try
{
Type transformType = ResolveTransformType(transformName);
if (transformType != null)
{
// Get the actual map from the BizTalk metadata cache.
BtsTransformMetadata btsTransform = BtsTransformMetadata.For(transformType);
if (btsTransform != null)
{
// Map existence confirmed, now it's safe to instantiate the transform type.
TransformBase transform = Activator.CreateInstance(transformType) as TransformBase;
// Is this really a valid map that implements TransformBase?
if (transform != null)
{
XslTransformMetadata transformMetadata = new XslTransformMetadata(transform.XmlContent, transform.XsltArgumentListContent, transform.SourceSchemas, transform.TargetSchemas);
DataContractSerializer dcSerializer = new DataContractSerializer(typeof(XslTransformMetadata), String.Concat(WellKnownContractMember.MethodNames.GetXslTransformMetadata, WellKnownContractMember.ResultMethodSuffix), WellKnownNamespace.ServiceContracts.General);
dcSerializer.WriteObject(responseWriter, transformMetadata);
}
}
}
}
catch (Exception ex)
{
// Log but do not pass the exception to the caller.
TraceManager.PipelineComponent.TraceError(ex);
}
responseWriter.WriteEndElement();
responseWriter.Flush();
}
dataStream.Seek(0, SeekOrigin.Begin);
responsePart.Data = dataStream;
TraceManager.PipelineComponent.TraceOut(callToken);
return(pInMsg);
}
/// <summary>
/// Executes the custom runtime task component to process the input message and returns the result message.
/// </summary>
/// <param name="pContext">A reference to <see cref="Microsoft.BizTalk.Component.Interop.IPipelineContext"/> object that contains the current pipeline context.</param>
/// <param name="pInMsg">A reference to <see cref="Microsoft.BizTalk.Message.Interop.IBaseMessage"/> object that contains the message to process.</param>
/// <returns>A reference to the returned <see cref="Microsoft.BizTalk.Message.Interop.IBaseMessage"/> object which will contain the output message.</returns>
public IBaseMessage Execute(IPipelineContext pContext, IBaseMessage pInMsg)
{
Guard.ArgumentNotNull(pContext, "pContext");
Guard.ArgumentNotNull(pInMsg, "pInMsg");
var callToken = TraceManager.PipelineComponent.TraceIn();
// It is OK to load the entire message into XML DOM. The size of these requests is anticipated to be very small.
XDocument request = XDocument.Load(pInMsg.BodyPart.GetOriginalDataStream());
string sectionName = (from childNode in request.Root.Descendants() where childNode.Name.LocalName == WellKnownContractMember.MessageParameters.SectionName select childNode.Value).FirstOrDefault <string>();
string applicationName = (from childNode in request.Root.Descendants() where childNode.Name.LocalName == WellKnownContractMember.MessageParameters.ApplicationName select childNode.Value).FirstOrDefault <string>();
string machineName = (from childNode in request.Root.Descendants() where childNode.Name.LocalName == WellKnownContractMember.MessageParameters.MachineName select childNode.Value).FirstOrDefault <string>();
TraceManager.PipelineComponent.TraceInfo(TraceLogMessages.GetConfigSectionRequest, sectionName, applicationName, machineName);
IConfigurationSource configSource = ApplicationConfiguration.Current.Source;
IApplicationConfigurationSource appConfigSource = configSource as IApplicationConfigurationSource;
ConfigurationSection configSection = appConfigSource != null?appConfigSource.GetSection(sectionName, applicationName, machineName) : configSource.GetSection(sectionName);
if (configSection != null)
{
IBaseMessagePart responsePart = BizTalkUtility.CreateResponsePart(pContext.GetMessageFactory(), pInMsg);
XmlWriterSettings settings = new XmlWriterSettings();
MemoryStream dataStream = new MemoryStream();
pContext.ResourceTracker.AddResource(dataStream);
settings.CloseOutput = false;
settings.CheckCharacters = false;
settings.ConformanceLevel = ConformanceLevel.Fragment;
settings.NamespaceHandling = NamespaceHandling.OmitDuplicates;
using (XmlWriter configDataWriter = XmlWriter.Create(dataStream, settings))
{
configDataWriter.WriteResponseStartElement("r", WellKnownContractMember.MethodNames.GetConfigurationSection, WellKnownNamespace.ServiceContracts.General);
configDataWriter.WriteResultStartElement("r", WellKnownContractMember.MethodNames.GetConfigurationSection, WellKnownNamespace.ServiceContracts.General);
SerializableConfigurationSection serializableSection = configSection as SerializableConfigurationSection;
if (serializableSection != null)
{
serializableSection.WriteXml(configDataWriter);
}
else
{
MethodInfo info = configSection.GetType().GetMethod(WellKnownContractMember.MethodNames.SerializeSection, BindingFlags.NonPublic | BindingFlags.Instance);
string serialized = (string)info.Invoke(configSection, new object[] { configSection, sectionName, ConfigurationSaveMode.Full });
configDataWriter.WriteRaw(serialized);
}
configDataWriter.WriteEndElement();
configDataWriter.WriteEndElement();
configDataWriter.Flush();
}
dataStream.Seek(0, SeekOrigin.Begin);
responsePart.Data = dataStream;
}
else
{
throw new ApplicationException(String.Format(CultureInfo.InvariantCulture, ExceptionMessages.ConfigurationSectionNotFound, sectionName, ApplicationConfiguration.Current.Source.GetType().FullName));
}
TraceManager.PipelineComponent.TraceOut(callToken);
return(pInMsg);
}
/// <summary>
/// Synchronously executes the task using the specified <see cref="RuntimeTaskExecutionContext"/> execution context object.
/// </summary>
/// <param name="context">The execution context.</param>
public override void Run(RuntimeTaskExecutionContext context)
{
Guard.ArgumentNotNull(context, "context");
Guard.ArgumentNotNull(context.Message, "context.Message");
var callToken = TraceManager.PipelineComponent.TraceIn();
Stream messageDataStream = null;
IEnumerable <object> facts = null;
string policyName = PolicyName, ctxPropName = null, ctxPropNamespace = null;
Version policyVersion = PolicyVersion;
RulesEngineRequest request = null;
bool responseRequired = true;
try
{
XmlReaderSettings readerSettings = new XmlReaderSettings()
{
CloseInput = false, CheckCharacters = false, IgnoreComments = true, IgnoreProcessingInstructions = true, IgnoreWhitespace = true, ValidationType = ValidationType.None
};
if (context.Message.BodyPart != null)
{
messageDataStream = BizTalkUtility.EnsureSeekableStream(context.Message, context.PipelineContext);
if (messageDataStream != null)
{
using (XmlReader messageDataReader = XmlReader.Create(messageDataStream, readerSettings))
{
// Navigate through the XML reader until we find an element with the expected name and namespace.
while (!messageDataReader.EOF && messageDataReader.Name != WellKnownContractMember.MessageParameters.Request && messageDataReader.NamespaceURI != WellKnownNamespace.DataContracts.General)
{
messageDataReader.Read();
}
// Element was found, let's perform de-serialization from XML into a RulesEngineRequest object.
if (!messageDataReader.EOF)
{
DataContractSerializer serializer = new DataContractSerializer(typeof(RulesEngineRequest));
request = serializer.ReadObject(messageDataReader, false) as RulesEngineRequest;
if (request != null)
{
policyName = request.PolicyName;
policyVersion = request.PolicyVersion;
facts = request.Facts;
}
}
}
}
}
// Check if the policy name was supplied when this component was instantiated or retrieved from a request message.
if (!String.IsNullOrEmpty(policyName))
{
// If policy version is not specified, use the latest deployed version.
PolicyExecutionInfo policyExecInfo = policyVersion != null ? new PolicyExecutionInfo(policyName, policyVersion) : new PolicyExecutionInfo(policyName);
// Use all context properties as parameters when invoking a policy.
for (int i = 0; i < context.Message.Context.CountProperties; i++)
{
ctxPropName = null;
ctxPropNamespace = null;
object ctxPropValue = context.Message.Context.ReadAt(i, out ctxPropName, out ctxPropNamespace);
policyExecInfo.AddParameter(String.Format("{0}#{1}", ctxPropNamespace, ctxPropName), ctxPropValue);
}
// If we still haven't determined what facts should be passed to the policy, let's use the request message as a single fact.
if (null == facts)
{
if (messageDataStream != null)
{
// Unwind the data stream back to the beginning.
messageDataStream.Seek(0, SeekOrigin.Begin);
// Read the entire message into a BRE-compliant type XML document.
using (XmlReader messageDataReader = XmlReader.Create(messageDataStream, readerSettings))
{
facts = new object[] { new TypedXmlDocument(Resources.DefaultTypedXmlDocumentTypeName, messageDataReader) };
responseRequired = false;
}
}
}
// Execute a BRE policy.
PolicyExecutionResult policyExecResult = PolicyHelper.Execute(policyExecInfo, facts);
// CHeck if we need to return a response. We don't need to reply back if we are not handling ExecutePolicy request message.
if (responseRequired)
{
// Construct a response message.
RulesEngineResponse response = new RulesEngineResponse(policyExecResult.PolicyName, policyExecResult.PolicyVersion, policyExecResult.Success);
// Add all facts that were being used when invoking the policy.
response.AddFacts(facts);
// Create a response message.
IBaseMessagePart responsePart = BizTalkUtility.CreateResponsePart(context.PipelineContext.GetMessageFactory(), context.Message);
XmlWriterSettings settings = new XmlWriterSettings();
// Initialize a new stream that will hold the response message payload.
MemoryStream dataStream = new MemoryStream();
context.PipelineContext.ResourceTracker.AddResource(dataStream);
settings.CloseOutput = false;
settings.CheckCharacters = false;
settings.ConformanceLevel = ConformanceLevel.Fragment;
settings.NamespaceHandling = NamespaceHandling.OmitDuplicates;
using (XmlWriter responseWriter = XmlWriter.Create(dataStream, settings))
{
responseWriter.WriteResponseStartElement("r", WellKnownContractMember.MethodNames.ExecutePolicy, WellKnownNamespace.ServiceContracts.General);
DataContractSerializer dcSerializer = new DataContractSerializer(typeof(RulesEngineResponse), String.Concat(WellKnownContractMember.MethodNames.ExecutePolicy, WellKnownContractMember.ResultMethodSuffix), WellKnownNamespace.ServiceContracts.General);
dcSerializer.WriteObject(responseWriter, response);
responseWriter.WriteEndElement();
responseWriter.Flush();
}
dataStream.Seek(0, SeekOrigin.Begin);
responsePart.Data = dataStream;
}
else
{
if (facts != null)
{
TypedXmlDocument xmlDoc = facts.Where((item) => { return(item.GetType() == typeof(TypedXmlDocument)); }).FirstOrDefault() as TypedXmlDocument;
if (xmlDoc != null)
{
// Initialize a new stream that will hold the response message payload.
MemoryStream dataStream = new MemoryStream();
context.PipelineContext.ResourceTracker.AddResource(dataStream);
XmlWriterSettings settings = new XmlWriterSettings
{
CloseOutput = false,
CheckCharacters = false,
ConformanceLevel = ConformanceLevel.Fragment,
NamespaceHandling = NamespaceHandling.OmitDuplicates
};
using (XmlWriter dataWriter = XmlWriter.Create(dataStream, settings))
{
xmlDoc.Document.WriteContentTo(dataWriter);
dataWriter.Flush();
}
dataStream.Seek(0, SeekOrigin.Begin);
context.Message.BodyPart.Data = dataStream;
}
}
}
}
else
{
throw new ApplicationException(String.Format(CultureInfo.InvariantCulture, ExceptionMessages.PolicyNameNotSpecified));
}
}
finally
{
if (messageDataStream != null && messageDataStream.CanSeek && messageDataStream.Position > 0)
{
messageDataStream.Seek(0, SeekOrigin.Begin);
}
TraceManager.PipelineComponent.TraceOut(callToken);
}
}