Esempio n. 1
0
        /// <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);
        }
Esempio n. 2
0
        /// <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);
        }
Esempio n. 3
0
        /// <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);
            }
        }