topic Connecting To Alfresco By Using CMIS API in Alfresco Archive

Connecting To Alfresco By Using CMIS API

narithota — Tue, 08 Jan 2013 04:47:07 GMT

Hi Team,Previously I have worked with alfresco web-services to upload and download documents to alfresco. But now our organization need to upload the documents with our organization specific metadata. So I searched in the forum but I did not get any info on how to upload the documents with custom me

Re: Connecting To Alfresco By Using CMIS API

mikeh — Tue, 08 Jan 2013 09:03:23 GMT

You need to read the following post, as it seems to apply to your situation: https://forums.alfresco.com/en/viewtopic.php?f=47&t=45940

Re: Connecting To Alfresco By Using CMIS API

narithota — Tue, 08 Jan 2013 09:47:28 GMT

Hi MikeH,

First of all thanks for the quick response.

So, In order to search the repository by using the CMIS API, we need to manually create the SSL certificates.

But our searching by using web-services is working fine and by using CMIS API we are able to connect to repository,get the repository information but getting error while getting the folder information. Is lack of SSL certificates causes these problems?

Re: Connecting To Alfresco By Using CMIS API

mikeh — Tue, 08 Jan 2013 10:15:30 GMT

You need to replace the SSL certificate that was shipped with 4.0.

Exception:   java.security.cert.CertificateExpiredException - NotAfter: Fri Aug 17 17:34:11 GMT+05:30 2012‍

Your other option is to upgrade to the latest Community Edition (4.2.c) which replaces the SOLR certificate with one that has an expiration date in the far future.

Thanks,
Mike

Re: Connecting To Alfresco By Using CMIS API

narithota — Tue, 08 Jan 2013 11:03:01 GMT

Hi Mike,

Sorry for inconvenience.

So do we need to upgrade the alfresco to perform the search by using CMIS.

But we can able to download the documents by searching in alfresco based on document id by using alfresco java web services api.

Is expiration of SOLR certificates restricts only CMIS API?

Is following error also caused by the expiration of SOLR certificates?

Exception in thread "main" java.lang.IllegalArgumentException: Unknown aspect property: null
   at org.alfresco.cmis.client.impl.AlfrescoObjectFactoryImpl.convertProperties(AlfrescoObjectFactoryImpl.java:236)
   at org.apache.chemistry.opencmis.client.runtime.AbstractCmisObject.initialize(AbstractCmisObject.java:108)
   at org.alfresco.cmis.client.impl.AlfrescoFolderImpl.initialize(AlfrescoFolderImpl.java:46)
   at org.apache.chemistry.opencmis.client.runtime.FolderImpl.<init>(FolderImpl.java:69)
   at org.alfresco.cmis.client.impl.AlfrescoFolderImpl.<init>(AlfrescoFolderImpl.java:39)
   at org.alfresco.cmis.client.impl.AlfrescoObjectFactoryImpl.convertObject(AlfrescoObjectFactoryImpl.java:297)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getObject(SessionImpl.java:397)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getObject(SessionImpl.java:367)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getRootFolder(SessionImpl.java:472)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getRootFolder(SessionImpl.java:466)
   at com.rcv.alfresco.dao.Demo2.main(Demo2.java:62)‍‍‍‍‍‍‍‍‍‍‍‍

Thanks
Naresh

Re: Connecting To Alfresco By Using CMIS API

mikeh — Tue, 08 Jan 2013 14:14:43 GMT

I'm not sure what's causing your unknown aspect issue - possibly a custom model you've not migrated across to a new version..? But it's best to tackle one problem at a time.

Thanks,
Mike

Re: Connecting To Alfresco By Using CMIS API

narithota — Thu, 10 Jan 2013 06:57:37 GMT

Hi Mike,

I installed Alfresco Enterprise - v4.1.2 (372) and configured it.

Now

http://<host>:8080/alfresco/service/cmis/s/workspacepacesStore/i/6cc685e0-9ac3-jnk34s-4d55-8af3-dd7b2bba78b7/children

url is working.

But when I tried to connect to alfresco by using CMIS API, it is giving same exception :

Exception in thread "main" java.lang.IllegalArgumentException: Unknown aspect property: null
   at org.alfresco.cmis.client.impl.AlfrescoObjectFactoryImpl.convertProperties(AlfrescoObjectFactoryImpl.java:236)
   at org.apache.chemistry.opencmis.client.runtime.AbstractCmisObject.initialize(AbstractCmisObject.java:108)
   at org.alfresco.cmis.client.impl.AlfrescoFolderImpl.initialize(AlfrescoFolderImpl.java:46)
   at org.apache.chemistry.opencmis.client.runtime.FolderImpl.<init>(FolderImpl.java:69)
   at org.alfresco.cmis.client.impl.AlfrescoFolderImpl.<init>(AlfrescoFolderImpl.java:39)
   at org.alfresco.cmis.client.impl.AlfrescoObjectFactoryImpl.convertObject(AlfrescoObjectFactoryImpl.java:297)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getObjectByPath(SessionImpl.java:444)
   at org.apache.chemistry.opencmis.client.runtime.SessionImpl.getObjectByPath(SessionImpl.java:418)
   at com.rcv.alfresco.dao.CMISExampleBase.getSession(CMISExampleBase.java:72)
   at com.rcv.alfresco.dao.CMISExampleBase.main(CMISExampleBase.java:89)
‍‍‍‍‍‍‍‍‍‍‍‍

Following piece of code from AlfrescoObjectFactoryImpl is throwing the exception


            for (CmisExtensionElement property : extension.getChildren())
            {
                String id = property.getAttributes().get("propertyDefinitionId");

                // find the aspect type
                ObjectType aspectType = AlfrescoAspectsUtils.findAspect(aspectTypes, id);
                if (aspectType == null)
                {
                    throw new IllegalArgumentException("Unknown aspect property: " + id);
                }‍‍‍‍‍‍‍‍‍‍‍

Following are Maven Dependencies of CMIS JARs

 <dependency>
   <groupId>org.alfresco.cmis.client</groupId>
   <artifactId>alfresco-opencmis-extension</artifactId>
   <version>0.3</version>
</dependency>

  <dependency>
   <groupId>org.apache.chemistry.opencmis</groupId>
   <artifactId>chemistry-opencmis-client-impl</artifactId>
   <version>0.8.0</version>
</dependency>‍‍‍‍‍‍‍‍‍‍‍

Re: Connecting To Alfresco By Using CMIS API

narithota — Thu, 10 Jan 2013 09:32:12 GMT

Its working!!!!!!!!

Actually I am using Chemistry API to connect but for OBJECT_FACTORY_CLASS I have used opencmis's objectfactory class. Thats caused the problem.

Thanks
Naresh

Re: Connecting To Alfresco By Using CMIS API

jonbarril — Thu, 10 Jan 2013 18:54:20 GMT

I'm having a similar problem. What exactly did you do to fix the problem? What values are you using for OBJECT_FACTORY_CLASS, etc?

Thanks
–jon

Its working!!!!!!!!

Actually I am using Chemistry API to connect but for OBJECT_FACTORY_CLASS I have used opencmis's objectfactory class. Thats caused the problem.

Thanks
Naresh

Re: Connecting To Alfresco By Using CMIS API

narithota — Fri, 11 Jan 2013 04:23:42 GMT

I am using following class for object factory

org.apache.chemistry.opencmis.client.runtime.repository.ObjectFactoryImpl which is apache chemistry's object factory impl class…

my code follows

 String serviceUrl = "http://<my host>:8080/alfresco/service/cmis"; // Uncomment for Atom Pub binding
 
     Session session = null;
    
   public Session getSession() throws Exception {
      if (session == null) {
         // default factory implementation
         SessionFactory factory = SessionFactoryImpl.newInstance();
         Map<String, String> parameter = new HashMap<String, String>();
   
         // user credentials
         parameter.put(SessionParameter.USER, "user");
         parameter.put(SessionParameter.PASSWORD, "my pass");
   
         // connection settings
         parameter.put(SessionParameter.ATOMPUB_URL, getServiceUrl()); // Uncomment for Atom Pub binding
               
         
         parameter.put(SessionParameter.BINDING_TYPE, BindingType.ATOMPUB.value()); // Uncomment for Atom Pub binding
            
         // Set the alfresco object factory
         // Used when using the CMIS extension for Alfresco for working with aspects
         parameter.put(SessionParameter.OBJECT_FACTORY_CLASS, "org.apache.chemistry.opencmis.client.runtime.repository.ObjectFactoryImpl");
         
         List<Repository> repositories = factory.getRepositories(parameter);         
         System.out.println("repository : "+repositories.get(0).getId());                                 
         session = repositories.get(0).createSession();                  
         Folder root=session.getRootFolder();‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍