Biztalk Pipeline框架核心类分析

Microsoft.BizTalk.Message.Interop.IBaseMessage
用途：Pipeline中的Message，管理IBaseMessagePart
属性：IBaseMessageContext类型的Context

Microsoft.BizTalk.Message.Interop.IBaseMessagePart
用途：Pipeline Message的每个部分
属性：Stream类型Data，表示内容；IBasePropertyBag类型PartProperties，表示与MessagePart关联的属性

Microsoft.BizTalk.Component.Interop.IPipelineContext
用途：Pipeline上下文
属性：PipelineID,PipelineName以及GetMessageFactory()方法

Microsoft.BizTalk.Component.Interop.IBaseMessageFactory
用途：用于创建IBaseMessage的工具类

Microsoft.BizTalk.Component.Utilities.Schema
属性：AssemblyName，DocSpecName，RootName，SchemaName，TargetNamespace
构造方法：通过DocSpecName构造，即Xsd的Namespace+TypeName

Microsoft.BizTalk.Component.Utilities.SchemaList
用途：表示Schema的集合
常用方法：Add(Schema schema)

Microsoft.BizTalk.Component.Interop.IDocumentSpec
属性：DocSpecName,DocSpecStrongName,DocType
用途：对应Schema的specification
构造方法：IPipelineContext.GetDocumentSpecByNameontext(string schemaName)

Microsoft.BizTalk.Component.Interop.IFFDocumentSpec
用途：IDocumentSpec的子类，用来表示Flat File Xsd对应的Specification
方法：Probe(IDataReader)，检测是否数据可被Flat File Xsd解析

System.Xml.Schema.XmlSchemaCollection
用途：表示Schema具体定义的集合
构造方法：XmlSchemaCollection schemas = new XmlSchemaCollection(new System.Xml.NameTable())
          IDocumentSpec.GetSchemaCollection()
Note:一个Schema Specification中可能包含引用或者包含了多个其它SchemaMicrosoft.BizTalk.Message.Interop

Microsoft.BizTalk.Streaming.MarkableForwardOnlyEventingReadStream
用途：为某种特殊Message Stream优化设计的Stream
构造方法：MarkableForwardOnlyEventingReadStream(Stream data)
相关用途：string Microsoft.BizTalk.Streaming.Utils.GetDocType(MarkableForwardOnlyEventingReadStream stm)
          IPipelineContext.GetDocumentSpecByType(string docType)

Microsoft.BizTalk.Streaming.Utils
用途：针对Message Stream的工具类
方法：GetDocType(MarkableForwardOnlyEventingReadStream stm)

Microsoft.BizTalk.Component.Interop.PipelineUtil
方法：IBaseMessageContext CloneMessageContext(IBaseMessageContext msgctx)
      CopyPropertyBag(IBasePropertyBag inPropBag, IBaseMessageFactory factory)

Microsoft.BizTalk.Component.Utilities.SchemaRetriever
用途：用于获取当前Project在设计时可访问到的Schema集合
方法：Schema[] GetSchemas(object objProjectSystem)，objProjectSystem一般有系统调用时提供

Microsoft.BizTalk.Component.FFDasmComp
用途：对Flat File Xsd Message进行Disassembler
方法：Probe(IPipelineContext,IBaseMessage)

Microsoft.XLANGs.Pipeline.XLANGPipelineManager.ExecuteReceivePipeline
用途：在Orchestration中执行Pipeline