/// <summary>
/// Executes a pipeline 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 override IBaseMessage Execute(IPipelineContext pContext, IBaseMessage pInMsg)
{
if (pContext != null && pInMsg != null)
{
PolicyExecutionInfo policyExecInfo = !String.IsNullOrEmpty(PolicyVersion) ? new PolicyExecutionInfo(PolicyName, System.Version.Parse(PolicyVersion)) : new PolicyExecutionInfo(PolicyName);
string ctxPropName, ctxPropNamespace;
for (int i = 0; i < pInMsg.Context.CountProperties; i++)
{
ctxPropName = null;
ctxPropNamespace = null;
object ctxPropValue = pInMsg.Context.ReadAt(i, out ctxPropName, out ctxPropNamespace);
policyExecInfo.AddParameter(String.Format("{0}{1}{2}", ctxPropNamespace, BizTalkUtility.ContextPropertyNameSeparator, ctxPropName), ctxPropValue);
#if DEBUG
TraceManager.PipelineComponent.TraceDetails("DETAIL: Context property added: {0}{1}{2} = {3}", ctxPropNamespace, BizTalkUtility.ContextPropertyNameSeparator, ctxPropName, ctxPropValue);
#endif
}
using (RuntimeTaskExecutionContext taskExecContext = new RuntimeTaskExecutionContext(pContext, pInMsg))
{
IList <IMessagingRuntimeExtenderTask> registeredTasks = RuntimeTaskFactory.GetRegisteredTasks(taskExecContext);
try
{
PolicyExecutionResult policyExecResult = PolicyHelper.Execute(policyExecInfo, registeredTasks);
if (policyExecResult.Success)
{
foreach (IMessagingRuntimeExtenderTask task in taskExecContext.Extensions.FindAll <IMessagingRuntimeExtenderTask>())
{
if (task.CanRun)
{
task.Run(taskExecContext);
}
}
return(taskExecContext.Message);
}
}
finally
{
policyExecInfo.ClearParameters();
registeredTasks.Clear();
registeredTasks = null;
}
}
}
return(pInMsg);
}
/// <summary>
/// Retrieves the specified <see cref="System.Configuration.ConfigurationSection"/> for a given application running of the specified machine.
/// </summary>
/// <param name="sectionName">The name of the section to be retrieved.</param>
/// <param name="applicationName">The name of the application for which a configuration section is being requested.</param>
/// <param name="machineName">The name of the machine on which the requesting application is running.</param>
/// <returns>The specified <see cref="System.Configuration.ConfigurationSection"/>, or a null reference if a section by that name is not found.</returns>
public ConfigurationSection GetSection(string sectionName, string applicationName, string machineName)
{
var callToken = TraceManager.RulesComponent.TraceIn(sectionName, this.configPolicy, this.configVersion);
try
{
PolicyExecutionInfo policyExecInfo = new PolicyExecutionInfo(PolicyName, PolicyVersion);
policyExecInfo.AddParameter(WellKnownContractMember.MessageParameters.SectionName, sectionName);
policyExecInfo.AddParameter(WellKnownContractMember.MessageParameters.ApplicationName, applicationName);
policyExecInfo.AddParameter(WellKnownContractMember.MessageParameters.MachineName, machineName);
ConfigurationSection configSection = ConfigurationSectionFactory.GetSection(sectionName);
if (configSection != null)
{
PolicyExecutionResult execResult = PolicyHelper.Execute(policyExecInfo, RulesEngineFactFactory.GetFacts(configSection));
if (execResult.Success)
{
// If policy invocation was successful, we need to update the policy version number of reflect the true version of the policy.
this.actualConfigVersion = new Version(execResult.PolicyVersion.Major, execResult.PolicyVersion.Minor);
if (SourceChanged != null)
{
SourceChanged(this, new ConfigurationSourceChangedEventArgs(this, new string[] { sectionName }));
}
return(configSection);
}
else
{
throw new ConfigurationErrorsException(String.Format(CultureInfo.CurrentCulture, ExceptionMessages.ConfigPolicyExecutionFailed, execResult.PolicyName), execResult.Errors.Count > 0 ? execResult.Errors[0] : null);
}
}
else
{
throw new ConfigurationErrorsException(String.Format(CultureInfo.CurrentCulture, ExceptionMessages.ConfigurationSectionNotSupported, sectionName, Resources.RulesEngineConfigurationSourceElementDisplayName));
}
}
finally
{
TraceManager.RulesComponent.TraceOut(callToken);
}
}
public void ValidateHandleGetConfigurationSectionRequestPolicy()
{
PolicyExecutionInfo policyExecInfo = new PolicyExecutionInfo("Contoso.Cloud.Integration.GenericCloudRequestHandling");
policyExecInfo.AddParameter("http://schemas.microsoft.com/BizTalk/2003/soap-properties#MethodName", "Contoso.Cloud.Integration.ServiceContracts/IOnPremiseConfigurationService/GetConfigurationSection");
IList <IMessagingRuntimeExtenderTask> registeredTasks = RuntimeTaskFactory.GetRegisteredTasks();
PolicyExecutionResult policyExecResult = PolicyHelper.Execute(policyExecInfo, registeredTasks);
IEnumerable <ExternalComponentInvokeTask> execTasks = registeredTasks.OfType <ExternalComponentInvokeTask>();
Assert.IsTrue(policyExecResult.Success, "Policy execution was not successful");
Assert.IsFalse(execTasks.Count() == 0, "No ExternalComponentInvokeTask was found in task collection");
ExternalComponentInvokeTask execTask = execTasks.ElementAt <ExternalComponentInvokeTask>(0);
Assert.IsNotNull(execTask, "execTask instance has not been found");
Assert.IsFalse(String.IsNullOrEmpty(execTask.AssemblyName), "AssemblyName is null or empty");
Assert.IsFalse(String.IsNullOrEmpty(execTask.TypeName), "TypeName is null or empty");
}
/// <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);
}
}
