cmis and apache chemistry (apachecon 2010)
DESCRIPTION
The CMIS standard provides an answer to most issues met by typical content-centric applications by offering a common model and a set of services for ECM interoperability. In this presentation we'll first provide an introduction to the CMIS services and bindings, then we'll offer a view of the landscape of the different ECM providers and clients implementing CMIS, and we'll finish with practical examples of the uses of OpenCMIS, the Apache Chemistry (Java) library, designed to help you easily write CMIS applications.Presented at ApacheCon 2010 (http://na.apachecon.com/c/acna2010/sessions/591)TRANSCRIPT
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Get your content under control with CMIS and
Apache Chemistry
Florent [email protected]/efge
ApacheCon NA, 2010-11-03
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Agenda• CMIS• Apache Chemistry• OpenCMIS Client coding• OpenCMIS Server coding
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Who am I?• Florent Guillaume
– [email protected]• Director of R&D at Nuxeo
– http://nuxeo.com– http://doc.nuxeo.com
• Nuxeo Architect• Apache Committer• Member of JSR 283, OASIS CMIS TC
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Glossary• CMIS
– Content Management Interop. Services• CMS, DMS, DAM, WCM, ECM, RM...
– content, document, asset, record...• Content Stream
– resource / file from a filesystem• Document
– self-contained, structured metadata– high-level operations
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What is CMIS?• Domain Model
– services– objects, types, properties– lowest greatest common denominator
• Transport Protocols– HTTP-based
• No Language API–⇒ Apache Chemistry
– (although WSDL is actually a language)5
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Interoperability• Application / Repository
– Client / Server
• Application ↔ Repository– e.g. photo management
• Repository ↔ Repository– e.g. archival, publishing
• Repository federation– central access to heterogenous systems
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CMIS Implementations• Product → Client / Repository• Repositories
– Alfresco, Nuxeo, Microsoft, IBM, SAP, eXo, Day, Jahia, KnowledgeTree, ...
• Clients– Adobe, IBM, Microsoft, eZ Publish,
Plone, Drupal, Joomla, ...
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SharePoint 2010 Connector
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SharePoint 2010
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IBM FileNet P8
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Nuxeo
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CMIS Workbench
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CMIS Spaces
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CMIS Explorer
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IBM Firefox Plugin
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Plone
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Drupal
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eZ Publish
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Joomla
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CMIS Benefits• Customer benefits
– interoperability between vendors– common model– “desilofication”– “commoditization”
• Vendor benefits– repository vendors get more apps– applications vendors get more repos
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CMIS Domain Model• Objects: Folders, Documents• Properties
– scalars, lists• string, boolean, decimal, integer, datetime, uri, id, html
– binary content stream• Types
– inheritance, constraints– standard properties
• id, name, creation, modification, version, ...
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Folders and Documents
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Folder(root)
Folderfoo
Folderbar
Folderblah
Folderstuff
Foldergee
Doc123
Doc456
Doc789
Doc001
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Document Properties• 5ba79978-a87f-4146-9dd4-5197c5ac0962
– cmis:objectId: 5ba79978-a87f-4146-9dd4-5197c5ac0962– cmis:objectTypeId: invoice– cmis:name: My Document– cmis:creationDate: 2010-01-25T10:15:07.155-08:00– cmis:createdBy: florent– cmis:lastModificationDate: 2010-01-25T10:20:53.286-08:00– cmis:lastModifiedBy: florent– cmis:contentStreamFileName: mydocument.pdf– cmis:contentStreamMimeType: application/pdf– cmis:isLatestVersion: true– cmis:versionLabel: v1.5– keywords: [example, sample, frobs]– importance: high
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Type Definition Properties• invoice
– cmis:objectId: ID– cmis:objectTypeId: ID– cmis:name: String– cmis:creationDate: DateTime (read-only)– cmis:createdBy: String (read-only)– cmis:lastModificationDate: DateTime– cmis:isLatestVersion: Boolean– keywords: String (multi-valued, not required)– importance: String (choices: low, medium, high)
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Type Definition• invoice
– id: invoice– localName: t-invoice– displayName: Invoice– baseId: cmis:document– parentId: record– fileable: true– queryable: true– fulltextIndexed: true– controllableACL: false
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CMIS Services• CRUD• Queries• Versioning• Renditions• Relationships• Multi-Filing, ACLs, Change Log,
Policies• Repositories, Types
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Retrieve• By ID• By Path
– ID ≠ name ≠ path segment ≠ file name• Parent(s) / Children / Tree• Properties• Content Stream• Allowable Actions• Renditions
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Retrieve Examples (I)• By ID
ObjectId id = session.createObjectId( "5ba79978-‐a87f-‐4146-‐9dd4-‐5197c5ac0962");CmisObject object = session.getObject(id);
• By PathFolder folder = (Folder) session.getObjectByPath( "/corporate/invoices/foo");
• Childrenfor (CmisObject child : folder.getChildren()) { ...}
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Retrieve Examples (II)• Properties
List<String> kw = doc.getPropertyValue("keywords");
• Content StreamContentStream cs = doc.getContentStream();String filename = cs.getFileName();InputStream stream = cs.getStream();
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Query• Retrieve by content• SQL-like Language
– Type → Table– Object → Row– Property → Column– Multi-Valued, Fulltext + Score, JOIN
• SELECT only– no UPDATE, DELETE
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Query Examples• Query
ItemIterable<QueryResult> list = session.query( "SELECT cmis:objectId FROM ...", true);for (QueryResult qr : list) { qr.getPropertyById("cmis:name");}
• CMISQLSELECT cmis:objectId, cmis:name, SCORE() AS sc FROM cmis:document WHERE importance = 'high' AND 'frobs' = ANY keywords AND IN_TREE('5ba79978-‐a87f') AND CONTAINS('barack OR obama') ORDER BY sc DESC
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Create, Update, Delete• Create
– may need content stream– may check in
• Update– may verify a change token– may change ID (auto-versioning)
• Delete– may delete all versions
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CRUD Examples• Create
Map<String, Serializable> props = new HashMap<String, Serializable>();props.put(PropertyIds.OBJECT_TYPE_ID, "Note");props.put(PropertyIds.NAME, "mynote");Document doc = folder.createDocument(props, contentStream, null);
• Updatedoc.updateProperties(props);
• Deletedoc.delete();
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Versioning• Version Series• Private Working Copy
• Check In, Check Out• Get All Versions
• (optional feature)
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Versioning Examples• Check Out
ObjectId pwcId = doc.checkOut();
• Check InObjectId verId = doc.checkIn(true, null, true, "foo");
• Get All VersionsList<Document> docs = doc.getAllVersions();
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Versioning Variants• No versioning (no type versionable)• Auto-versioning
– create new version on each edit• PWC not updatable
– explicit check in with new changes• Version-specific filing• Versions searchable or not
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Renditions• Retrieve Only• Additional Content Streams
– MIME type, kind, title, size• Various uses
– thumbnail / icon– transformations
• PDF, HTML• Multi-Page
• (optional feature)37
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Renditions Examples• Get Renditions
for (Rendition rendition : doc.getRenditions()) { String kind = rendition.getKind(); String title = rendition.getTitle(); String mimeType = rendition.getMimeType(); ContentStream cs = rendition.getContentStream(); ...}
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Relationships• Source, Target
• Unfiled, not versionable• May be queryable, controllable• May use referential integrity
• (optional feature)
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Relationships Examples• Create Relationship
Map<String, Serializable> props = new HashMap<String, Serializable>();props.put(PropertyIds.OBJECT_TYPE_ID, "Depends");props.put(PropertyIds.SOURCE_ID, source.getId());props.put(PropertyIds.TARGET_ID, target.getId());ObjectId relId = session.createRelationship(props);
• Get Relationshipsfor (Relationship rel : doc.getRelationships()) { ...}
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Multi-Filing, Unfiling• Only for documents, not folders• Zero, one or more parents• All parents are equivalent• Different paths
– (if paths are supported)
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Folders and Documents
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Folder(root)
Folderfoo
Folderbar
Folderblah
Folderstuff
Foldergee
Doc123
Doc456
Doc789
Doc001
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Multi-Filing, Unfiling
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Folder(root)
Folderfoo
Folderbar
Folderblah
Folderstuff
Foldergee
Doc123
Doc456
Doc789
Doc333
Doc001
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Multi-Filing Example• Multi-Filing
doc.addToFolder(folderId, false);
• Unfilingdoc.removeFromFolder(folderId);
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ACLs• Basic Read & Write permissions• Repository-specific permissions• Can be inherited along folder hierarchy• Can be updated• Mapping to Allowable Actions
– ACL: bob has Read / Write here– AA: bob canMoveObject here– canMoveObject (on Object + Source +
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Change Log• List of chronological changes to the
repository– create, update, delete– ID of object– optionally properties, ACLs, policies
• Since a given date (change log token)• May not be available since “forever”
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Change Log Examples• Get Content Changes
ChangeEvents events = session.getContentChanges( token, includeProperties, 1000);for (ChangeEvent ev : events.getChangeEvents()) { ObjectId id = ev.getObjectId(); Calendar time = ev.getChangeTime(); if (ev.getChangeType() == ChangeType.UPDATED) { props = ev.getProperties(); ... }}if (events.getHasMoreItems()) { token = events.getLatestChangeLogToken();}...
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Policies• Attach policies to controllable objects• Repository-specific
• Security policies• Aspects / Facets / Mixins• RM: Retention, Legal Hold
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Repositories• When connecting, list repositories• Find out repository capabilities
– implemented services, tree-based navigation, multi-filing, unfiling, query capabilities, ...
• Get repository-wide information– description, vendor, CMIS version, ...– root folder ID– latest change log token
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CMIS Bindings• AtomPub
– ReST base– URI templates
• SOAP– Common Web Services
• Browser Bindings– JSON-based (work in progress)
• ... more possible
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AtomPub
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GET http://cmisexample.oasis-‐open.org/rep1/5ba79978-‐a87f-‐4146-‐9dd4-‐5197c5ac0962 HTTP/1.0
HTTP/1.1 200 OkContent-‐Type: application/atom+xml;type=entry
<atom:entry> <atom:content src="..."/> <atom:id>urn:uuid:5ba79978-‐a87f-‐4146-‐9dd4-‐5197c5ac0962</atom:id> <atom:title type="text">CMIS Example Document</atom:title> <atom:updated>2010-‐01-‐25T10:20:53.286-‐08:00</atom:updated> <atom:link rel="self" href="..."/> <atom:link rel="edit" href="..."/> <atom:link type="application/atom+xml;type=entry" rel="describedby" href="..."/> <atom:link type="application/atom+xml;type=feed" rel="up" href="..."/> <atom:link type="application/atom+xml;type=feed" rel="version-‐history" href="..."/> <cmisra:object> <cmis:allowableActions>...</cmis:allowableActions> <cmis:properties> ... </cmis:properties> </cmisra:object></atom:entry>
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Non-ReST AtomPub• URI templates
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http://example.com/rep1/objectbyid/{id}?filter={filter}&includeAllowableActions={includeAllowableActions}&includePolicyIds={includePolicyIds}&includeRelationships={includeRelationships}&includeACL={includeACL}
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SOAP
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<S:Envelope> <S:Body> <cmism:getProperties> <cmism:repositoryId>rep1</cmism:repositoryId> <cmism:objectId> 5ba79978-‐a87f-‐4146-‐9dd4-‐5197c5ac0962 </cmism:objectId> </cmism:getProperties> </S:Body></S:Envelope>
<S:Envelope> <S:Body> <cmism:getPropertiesResponse> <cmism:properties> ... </cmism:properties> </cmism:getPropertiesResponse> </S:Body></S:Envelope>
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XML Payload
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<cmis:properties> <cmis:propertyId propertyDefinitionId="cmis:objectId"> <cmis:value>5ba79978-‐a87f-‐4146-‐9dd4-‐5197c5ac0962</cmis:value> </cmis:propertyId> <cmis:propertyId propertyDefinitionId="cmis:objectTypeId"> <cmis:value>invoice</cmis:value> </cmis:propertyId> <cmis:propertyString propertyDefinitionId="cmis:name"> <cmis:value>My Document</cmis:value> </cmis:propertyString> <cmis:propertyDateTime propertyDefinitionId="cmis:creationDate"> <cmis:value>2010-‐01-‐25T10:20:53.364-‐08:00</cmis:value> </cmis:propertyDateTime> <cmis:propertyString propertyDefinitionId="cmis:contentStreamFileName"> <cmis:value>mydocument.pdf</cmis:value> </cmis:propertyString> <cmis:propertyString propertyDefinitionId="cmis:contentStreamMimeType"> <cmis:value>application/pdf</cmis:value> </cmis:propertyString> <cmis:propertyString propertyDefinitionId="keywords"> <cmis:value>example</cmis:value> <cmis:value>sample</cmis:value> <cmis:value>frobs</cmis:value> </cmis:propertyString></cmis:properties>
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CMIS Miscellanea• Stateless• Transaction-less• Authentication left to repository
– HTTP Basic Auth, WS-Security + Username Token
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History of CMIS (I)• Founding members (from iECM) work
on a new standard– 2006– EMC, IBM, Microsoft
• Contributing members invited for review– Aug 2007– Alfresco, Open Text, Oracle, SAP
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History of CMIS (II)• Draft spec submitted to OASIS
– September 2008• OASIS committee formed
– November 2008• First public draft released
– October 2009• CMIS 1.0 standard approved
– May 2010
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History of CMIS (III)• OASIS TC members
– Adobe, Adullact, Alfresco, ASG Software Solutions, Booz Allen Hamilton, Citytech, Content Technologies, Day, dotCMS, Ektron, EMC, Entropysoft, Exalead, FatWire, Fidelity Investments, Flatirons Solutions, fme, Genus Technologies, Greenbytes, Harris Corp, IBM, Magnolia, Microsoft, Nuxeo, Open Text, Oracle, Pearson, Quark, SAP, Saperion, Structured Software Systems, Sun, Vamosa, Vignette, WeWebU
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Future of CMIS• CMIS 1.1
– late 2011– errata, clarifications– additional bindings– type mutability?
• CMIS 2.0– late 2012?– bigger features or non-backward compat
• Transactions, Hierarchical/complex properties, Mixin types, WebDAV binding, Batch, Multiple content streams, Internationalization, More explicit exceptions, Better exposure of renditions, RepositoryInfo Property types support, AtomPub expressibility and clean-up, Type management, Records Management, Pessimistic locking, Workflow, Content Tagging, Content Recommendations, Commenting, Social
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Other Standards• ODMA
– desktop-oriented• WebDAV, DeltaV
– filesystem-oriented• RSS, AtomPub
– limited domain model• JCR (JSR-170, JSR-283)
– Java-specific
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Apache Chemistry• Incubating project
– started in 2009– http://incubator.apache.org/chemistry/
• Implement whole CMIS spec• Client-side
– Java (OpenCMIS)– Python, PHP, JavaScript
• Server-side– Java (OpenCMIS)
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Chemistry / OpenCMIS History• Original Chemistry project
– Day, Nuxeo in 2009• OpenCMIS started privately
– Alfresco, Open Text, SAP– Proposed to Apache in December 2009
• Chemistry and OpenCMIS merge– 3 days of meetings in April 2010
• OpenCMIS 0.1.0 released Sept. 2010
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OpenCMIS Facts• 90k lines of Java
– OSGi bundles– 5 JARs needed for a client– Built with Maven
• Covers all aspects of the spec• Extensible• Lots of tests• Contributors
– Alfresco, Day, Nuxeo, Open Text, SAP...63
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OpenCMIS Components• Client API• Client implementation
– CMIS Workbench• Server SPI• Server implementations
– filesystem– in-memory
• Transport protocol bindings– AtomPub, SOAP, JSON
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CMIS Workbench
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CMIS Workbench
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CMIS Workbench Console
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Clients using OpenCMIS• Spring Surf CMIS Application Browser• Confluence CMIS Plugin• CMIS Explorer• CMIS connectivity for SAP
Applications (upcoming)• Struts2CmisExplorer• CMIS Workbench• Alfresco Web Quick Start
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Servers using OpenCMIS• Open Text Enterprise Library CMIS
Connector• OpenWGA CMIS Connectivity Plugin• Alfresco CMIS Preview• Nuxeo CMIS Connector
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OpenCMIS – Client coding
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• See above :)
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OpenCMIS – Server coding• Define model mapping
– types, property types– ids, path segments, names– files, filenames– versioning, locking, content log
• Implement the SPI– CmisService
• Bindings are taken care of for you!
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OpenCMIS – Server coding
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SPI
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Questions?• http://www.oasis-open.org/
committees/cmis/• http://docs.oasis-open.org/cmis/
CMIS/v1.0/cs01/cmis-spec-v1.0.html• http://incubator.apache.org/chemistry/• http://doc.nuxeo.com/
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