使用OpenCMIS创建和更新文档，同时保持版本历史记录

Question

有人可以发布创建新文档所需的OpenCMIS代码，然后通过更新其内容流来更新该文档吗？我不想丢失原始文档 - 我想在新文档更新时保留版本历史记录。我正在使用Alfresco，但这应该适用于任何CMIS存储库。

Answer 1

在露天，创建一个新的版本，只是让被检出后，返回给你的私人工作副本，更新PWC的内容流，然后检查回。Alfresco的将管理的版本为您服务。这是一个例子。

Folder folder = (Folder) getSession().getObjectByPath("/cmis-demo"); 

String timeStamp = new Long(System.currentTimeMillis()).toString(); 
String filename = "cmis-demo-doc (" + timeStamp + ")"; 

// Create a doc 
Map <String, Object> properties = new HashMap<String, Object>(); 
properties.put(PropertyIds.OBJECT_TYPE_ID, "cmis:document"); 
properties.put(PropertyIds.NAME, filename); 
String docText = "This is a sample document"; 
byte[] content = docText.getBytes(); 
InputStream stream = new ByteArrayInputStream(content); 
ContentStream contentStream = getSession().getObjectFactory().createContentStream(filename, Long.valueOf(content.length), "text/plain", stream); 

Document doc = folder.createDocument(
      properties, 
      contentStream, 
      VersioningState.MAJOR); 

System.out.println("Created: " + doc.getId()); 
System.out.println("Content Length: " + doc.getContentStreamLength()); 
System.out.println("Version label:" + doc.getVersionLabel()); 

// Now update it with a new version 
if (doc.getAllowableActions().getAllowableActions().contains(org.apache.chemistry.opencmis.commons.enums.Action.CAN_CHECK_OUT)) { 
    doc.refresh(); 
    String testName = doc.getContentStream().getFileName(); 
    ObjectId idOfCheckedOutDocument = doc.checkOut(); 
    Document pwc = (Document) session.getObject(idOfCheckedOutDocument); 
    docText = "This is a sample document with an UPDATE"; 
    content = docText.getBytes(); 
    stream = new ByteArrayInputStream(content);   
    contentStream = getSession().getObjectFactory().createContentStream(filename, Long.valueOf(content.length), "text/plain", stream);   
    ObjectId objectId = pwc.checkIn(false, null, contentStream, "just a minor change"); 
    doc = (Document) session.getObject(objectId); 
    System.out.println("Version label is now:" + doc.getVersionLabel()); 
} 

运行时，它输出这样的：

Created: workspace://SpacesStore/d6f3fca2-bf9c-4a0e-8141-088d07d45359;1.0 
Content Length: 25 
Version label:1.0 
Version label is now:1.1 
Done