Biztalk Server zip unzip pipeline component Development

 

Biztalk Server zip unzip pipeline component Development

最近有个B2B的项目涉及和其他合作伙伴(partner)作数据传输,我们这边使用的开发平台(platform)Biztalk Server 2006,数据传输管道(channel)采用window server 2003MSMQ,但是由于MSMQ本身存在单个消息有4M限制的问题,虽软Biztalk Server 2006自带的MSMQ Adapter已经对大消息(Large Data)的支持,提供了[Support segmentation] if true , message larger than 4095KB(approximately 4MB) will be segmented,说明当发送单个报文实例(Instance)超过4MB的时候可以在发送至MSMQ对列的时候进行分割成几个小的消息发送,这些被分割的消息之间通过Message. CorrelationId进行关联具体的做法可以参考《MSMQ消息大于4MB限制的解决办法》采用对消息进行分割的做法会对接收消息需要作特定的判断,相对于对报文压缩来得比较简单;

下面介绍一下如何通过对Biztalk Pipeline的二次开发实现对报文进行压缩/解压得实现;

功能描述:

1/Biztalk 流程(Orchestration)出来的消息在发送端口通过加载pipeline组件实现将消息以zip的方式进行压缩(zip可以对Xml,txt文档的压缩比达到101

2/将接收的zip文件(支持包含多个文件批处理(batch))进行压缩后进入Biztalk流程(Orchestration)处理;

                    

具体实现:

要实现对Biztalk Pipeline的开发对如下接口[Microsoft.BizTalk.Component.Interop.IComponent,IBaseComponent, IPersistPropertyBag, IComponentUI]做实现,好在现在网上提供pipeline component wizradhttp://www.gotdotnet.com/Workspaces/Workspace.aspx?id=1d4f7d6b-7d27-4f05-a8ee-48cfcd5abf4a 可以下载到pipeline开发向导

实现对文件进行压缩/解压需要的[ICSharpCode.SharpZipLib.dll]目前版本0.85相当稳定;下载地址:http://www.icsharpcode.net/OpenSource/SharpZipLib/ 具体方法请查看版本

通过安装pipeline component wizrad之后就可以在vs.net中创建你的pipeline component组件了。CategoryTypes表示该组件可以加载到pipline的什么位置CategoryTypes.CATID_Any表示任何位置都可以放;

    [ComponentCategory(CategoryTypes.CATID_PipelineComponent)]

    [System.Runtime.InteropServices.Guid("62656b9b-7d69-407d-b71f-d3c0415c82af")]

    [ComponentCategory(CategoryTypes.CATID_DisassemblingParser)]

    public class UnzipDisassemblerComponent : Microsoft.BizTalk.Component.Interop.IDisassemblerComponent, IBaseComponent, IPersistPropertyBag, IComponentUI

    {

 

        private System.Resources.ResourceManager resourceManager = new System.Resources.ResourceManager("Execution.BizTalk.Common.Pipelines.UnzipDisassemblerPipeline", Assembly.GetExecutingAssembly());

 

        #region IBaseComponent members

 

下面是对Biztalk消息进行解压/压缩的代码实现。

       

  1/// <summary>解压
  2
  3        /// called by the messaging engine when a new message arrives
  4
  5        /// </summary>
  6
  7        /// <param name="pc">the pipeline context</param>
  8
  9        /// <param name="inmsg">the actual message</param>

 10
 11        public void Disassemble(Microsoft.BizTalk.Component.Interop.IPipelineContext pc, Microsoft.BizTalk.Message.Interop.IBaseMessage inmsg)
 12
 13        {
 14
 15 
 16
 17            Stream strmZipFile;
 18
 19 
 20
 21            IBaseMessagePart msgPart;
 22
 23            msgPart = inmsg.BodyPart;
 24
 25            strmZipFile = msgPart.GetOriginalDataStream();
 26
 27 
 28
 29            ZipInputStream oZipStream = new ZipInputStream(strmZipFile);
 30
 31            if (!string.IsNullOrEmpty(mPassword))
 32
 33                oZipStream.Password = mPassword;
 34
 35 
 36
 37            try
 38
 39            {
 40
 41 
 42
 43                ZipEntry sEntry = oZipStream.GetNextEntry();
 44
 45                while (sEntry != null )
 46
 47                {
 48
 49                    if (sEntry.IsDirectory)
 50
 51                    {
 52
 53                        sEntry = oZipStream.GetNextEntry();
 54
 55                        continue;
 56
 57                    }

 58
 59 
 60
 61                    MemoryStream strmMem = new MemoryStream();
 62
 63                    byte[] buffer = new byte[4096];
 64
 65                    int count = 0;
 66
 67                    while ((count = oZipStream.Read(buffer, 0, buffer.Length)) != 0)
 68
 69                        strmMem.Write(buffer, 0, count);
 70
 71 
 72
 73                    strmMem.Seek(0, SeekOrigin.Begin);
 74
 75                    msgPart.Data = strmMem;
 76
 77 
 78
 79                    IBaseMessage outMsg;
 80
 81 
 82
 83                    outMsg = pc.GetMessageFactory().CreateMessage();
 84
 85                    outMsg.AddPart("Body", pc.GetMessageFactory().CreateMessagePart(), true);
 86
 87                    outMsg.BodyPart.Data = strmMem;
 88
 89 
 90
 91                    for (int iProp = 0; iProp < inmsg.Context.CountProperties; iProp++)
 92
 93                    {
 94
 95                        string strName;
 96
 97                        string strNSpace;
 98
 99 
100
101                        object val = inmsg.Context.ReadAt(iProp, out strName, out strNSpace);
102
103                        // If the property has been promoted, respect the settings
104
105                        if (inmsg.Context.IsPromoted(strName, strNSpace))
106
107                            outMsg.Context.Promote(strName, strNSpace, val);
108
109                        else
110
111                            outMsg.Context.Write(strName, strNSpace, val);
112
113                    }

114
115 
116
117                    if (this.Namespace != null && this.RootElementName != null)
118
119                    {
120
121                        string messageType = string.Format("{0}#{1}"this.Namespace, this.RootElementName);
122
123                        outMsg.Context.Promote("MessageType""http://schemas.microsoft.com/BizTalk/2003/system-properties", messageType);
124
125                    }

126
127                    _msgs.Enqueue(outMsg);
128
129                    sEntry = oZipStream.GetNextEntry();
130
131                }

132
133            }

134
135            catch (Exception ex)
136
137            {
138
139                Debug.Write(ex.Message + Environment.NewLine + ex.StackTrace);
140
141                throw;
142
143            }

144
145 
146
147        }

148
149 
150
151//压缩消息
152
153/// <summary>
154
155        /// Implements IComponent.Execute method.
156
157        /// </summary>
158
159        /// <param name="pc">Pipeline context</param>
160
161        /// <param name="inmsg">Input message</param>
162
163        /// <returns>Original input message</returns>
164
165        /// <remarks>
166
167        /// IComponent.Execute method is used to initiate
168
169        /// the processing of the message in this pipeline component.
170
171        /// </remarks>

172
173        public Microsoft.BizTalk.Message.Interop.IBaseMessage Execute(
174
175            Microsoft.BizTalk.Component.Interop.IPipelineContext pc, 
176
177            Microsoft.BizTalk.Message.Interop.IBaseMessage inmsg)
178
179        {
180
181            // 
182
183            // TODO: implement component logic
184
185            
186
187            //string[] filenames = Directory.GetFiles(args[0]);
188
189            byte[] buffer = new byte[4096];
190
191            string fileName = string.Empty;
192
193            Stream strmZipFile=new MemoryStream();
194
195            Stream strmOriginFile;
196
197            Stream strmZip; ;
198
199            IBaseMessagePart msgPart;
200
201            msgPart = inmsg.BodyPart;
202
203            strmOriginFile = msgPart.GetOriginalDataStream();
204
205            try
206
207            {
208
209 
210
211                using (ZipOutputStream s = new ZipOutputStream(strmZipFile))
212
213                {
214
215 
216
217 
218
219                    s.SetLevel(9); // 0 - store only to 9 - means best compression
220
221                    //fileName = Guid.NewGuid().ToString() + "." + this.extension;
222
223                    fileName = inmsg.Context.Read("ReceivedFileName""http://schemas.microsoft.com/BizTalk/2003/" + messageContext.InboundTransportType.ToLower() + "-properties").ToString();
224
225                    s.Password = this.password;
226
227                    ZipEntry entry = new ZipEntry(fileName);
228
229                    s.PutNextEntry(entry);
230
231                    StreamUtils.Copy(strmOriginFile, s, buffer);
232
233                    s.Finish();
234
235                    strmZip = new MemoryStream();
236
237                    strmZipFile.Seek(0, SeekOrigin.Begin);
238
239                    StreamUtils.Copy(strmZipFile, strmZip, buffer);
240
241                    strmZip.Seek(0, SeekOrigin.Begin);
242
243                    s.Close();
244
245 
246
247 
248
249                }

250
251 
252
253                msgPart.Data = strmZip;
254
255                pc.ResourceTracker.AddResource(strmZip);
256
257                // this way, it's a passthrough pipeline component
258
259 
260
261                return inmsg;
262
263            }

264
265            catch (Exception e)
266
267            {
268
269                Debug.WriteLine("[zipAssember] " + e.Message);
270
271                throw e;
272
273            }

274
275        }

276
posted @ 2007-03-13 11:38  阿新  阅读(934)  评论(7编辑  收藏  举报