Content Enrichers

Pluggable Context

Sometimes it's useful to optimize the number of requests you send to the server. For this reason, we provide a mechanism for requesting more information on the response, simply by specifying the context you require in the request header.

For example, sometimes you need to get the children, parents or workflow tasks of a document while requesting that document. The Nuxeo Platform provides you with several content enrichers out of the box for the most common use cases, and you can contribute your own if needed.

Default Content Enrichers

Enricher	Included in Response:
`thumbnail`	Related attached file thumbnail of the current document
`preview`	Related attached file preview of the current document
`documentURL`	Document's URL
`breadcrumb`	Document breadcrumb (list of all parent documents)
`subtypes`	Array of document types that can be created under the current document
`children`	List of all children documents
`hasFolderishChild`	Boolean flag indicating whether or not current document has folderish child document
`favorites`	Boolean flag indicating whether or not current document belongs to user's Favorites
`collections`	The collections to which the current document belongs
`tags`	The tags on the current document
`runningWorkflows`	Workflow instances running on the current document
`runnableWorkflows`	Workflow models that can be launched on the current document
`pendingTasks`	Pending tasks on the current document
`acls`	All related ACLs of the current document
`permissions`	Current user's persmissions on the current document
`userVisiblePermissions`	List of permissions available on current document
`audit`	Latest log entries related to the current document
`subscribedNotifications`	Current user's subscribed notifications for the current document
`userprofile`	DOB, phone number and avatar of current user

How To Call a Content Enricher

Content enrichers can be called by sending the proper header(s) in your request. The header you need to call depends on the entity-type being affected by the enricher. Enrichers on documents can be called using the header:

enrichers.document: enricherName

If you want to call an enricher on a user, you would do it through a slightly different header:

enrichers.user: enricherName

Several enrichers can be called in a single request by specifying a comma separated list in the header, or by sending several headers:

enrichers.document: enricher1,enricher2,enricher3

is equivalent to sending:

enrichers.document: enricher1
enrichers.document: enricher2
enrichers.document: enricher3

The enrichers can be called the same way by passing GET parameters.

http://NUXEO_SERVER/nuxeo/api/v1/path/default-domain/workspaces?enrichers.document=enricher1,enricher2
http://NUXEO_SERVER/nuxeo/api/v1/path/default-domain/workspaces?enrichers.document=enricher1&enrichers.document=enricher2

Examples

Thumbnail

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: thumbnail
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "thumbnail": {
      "url": "http://NUXEO_SERVER/nuxeo/api/v1/4246ca87-c076-4bf4-b62b-0bab9dd21102/@rendition/thumbnail"
    }
  }
}

More details about the thumbnail enricher: http://community.nuxeo.com/api/nuxeo/8.10/javadoc/org/nuxeo/ecm/platform/thumbnail/io/ThumbnailJsonEnricher.html

ACLs

Call Example

Request URL: http://NUXEO_SERVER/nuxeo/api/v1/id/036f99ec-a500-4a1e-9d89-e8eb656a0ff7
Request Method: GET
Request Headers
...
Content-type: application/json+nxentity
enrichers.document: acls
properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "path": "/default-domain/workspaces/Marketing",
  "type": "Workspace",
  "state": "project",
  "parentRef": "02d7b1d5-791a-4939-ae6e-aaa75c05bd2c",
  "isCheckedOut": true,
  "changeToken": "1426695969000",
  "title": "Marketing",
  "lastModified": "2015-03-18T16:26:09.00Z",
  "properties": {
    "dc:description": “”,
    ...
  },
  "facets": [
    "Folderish",
    ...
  ],
  "contextParameters": {
    "acls": [{
      "name": "local",
      "aces": [{
        "username": "jsmith",
        "permission": "ReadWrite",
        "granted": true
      }]
    }, {
      "name": "inherited",
      "aces": [{
        "username": "jdoe",
        "permission": "Everything",
        "granted": true
      }, {
        "username": "Administrator",
        "permission": "Everything",
        "granted": true
      }, {
        "username": "members",
        "permission": "Read",
        "granted": true
      }]
    }]
  }
}

More details about the ACLs enricher: http://community.nuxeo.com/api/nuxeo/latest/javadoc/org/nuxeo/ecm/permissions/ACLJsonEnricher.html

Preview

Call Example

Request URL:
http://localhost:18090/api/v1/repo/test/path/folder_1/photo.jpg
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: preview
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": “photo.jpg ",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": “”,
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "preview": {
      "url": "http://NUXEO_SERVER/nuxeo/restAPI/preview/default/4246ca87-c076-4bf4-b62b-0bab9dd21102/default/"
    }
  }
}

More details about the preview enricher: http://community.nuxeo.com/api/nuxeo/latest/javadoc/org/nuxeo/ecm/platform/preview/io/PreviewJsonEnricher.html

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: breadcrumb
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/IMG_20141004_132816.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "IMG_20141004_132816.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "breadcrumb": {
      "entity-type": "documents",
      "entries": [{
          "entity-type": "document",
          "repository": "default",
          "uid": "42bbc2f6-13bd-4eb1-8c35-07342358f5f8",
          "path": "/default-domain",
          "type": "Domain",
          "state": "project",
          "parentRef": "22288b40-7879-4665-b01e-b9bacb132506",
          "isCheckedOut": true,
          "changeToken": "1426694633000",
          "title": "Default domain",
          "lastModified": "2015-03-18T16:03:53.00Z",
          "facets": [
            "Folderish",
            ...
          ]
        }, {
          "entity-type": "document",
          ...
        }, {
          "entity-type": "document",
          ...
        }, {
          "entity-type": "document",
          ...
        ]
      }
    ]
  }
}
}

More details about the breadcrumb enricher: http://community.nuxeo.com/api/nuxeo/latest/javadoc/org/nuxeo/ecm/core/io/marshallers/json/enrichers/BreadcrumbJsonEnricher.html

Favorites

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: favorites
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "favorites": {
      "isFavorite": true
    }
  }
}

Collections

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: collections
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "collections": [{
      "changeToken": "1464771452017",
      "entity-type": "document",
      "facets": [
        "Versionable",
        "Collection",
        "NotCollectionMember"
      ],
      "isCheckedOut": true,
      "lastModified": "2016-06-01T08:57:32.01Z",
      "parentRef": "8e62af0a-a74c-4bd1-96a4-66034834bf3b",
      "path": "/default-domain/UserWorkspaces/Administrator/Collections/Fox Icons",
      "repository": "default",
      "state": "project",
      "title": "Fox Icons",
      "type": "Collection",
      "uid": "50110ba5-b129-40b2-9880-3d9783710404"
    }]
  }
}

Running Workflows

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: runningWorkflows
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "runningWorkflows": [{
      "attachedDocumentIds": [{
        "id": "4246ca87-c076-4bf4-b62b-0bab9dd21102"
      }],
      "entity-type": "workflow",
      "graphResource": "http://NUXEO_SERVER/nuxeo/api/v1/workflow/75dfb9e0-65dd-4150-9d66-ade0597e27c2/graph",
      "id": "75dfb9e0-65dd-4150-9d66-ade0597e27c2",
      "initiator": "Administrator",
      "name": "ParallelDocumentReview.27323664461439033",
      "state": "running",
      "title": "wf.parallelDocumentReview.ParallelDocumentReview",
      "variables": {
        "end_date": "2016-05-27T22:00:00.00Z",
        "initiatorComment": null,
        "participants": [],
        "review_result": "",
        "review_result_file": {
          "data": "http://NUXEO_SERVER/nuxeo/nxfile/default/75dfb9e0-65dd-4150-9d66-ade0597e27c2/var_ParallelDocumentReview:review_result_file/output.ftl",
          "digest": "f5bd3d4fc1431be93631ecc3862a4ddc",
          "digestAlgorithm": "MD5",
          "encoding": null,
          "length": "68",
          "mime-type": "text/xml",
          "name": "output.ftl"
        },
        "validationOrReview": null
      },
      "workflowModelName": "ParallelDocumentReview"
    }]
  }
}

Runnable Workflows

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: runnableWorkflows
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "runnableWorkflows": [{
      "attachedDocumentIds": [],
      "entity-type": "workflow",
      "graphResource": "http://NUXEO_SERVER/nuxeo/api/v1/workflowModel/SerialDocumentReview/graph",
      "id": "0b0a21b7-284c-4f69-99e6-c334f2c69077",
      "initiator": null,
      "name": "SerialDocumentReview",
      "state": "validated",
      "title": "wf.serialDocumentReview.SerialDocumentReview",
      "variables": {
        "index": 0,
        "initiatorComment": null,
        "participants": [],
        "validationOrReview": "validation"
      },
      "workflowModelName": "SerialDocumentReview"
    }]
  }
}

Pending Tasks

Call Example

Request URL:
http://NUXEO_SERVER/nuxeo/api/v1/id/4246ca87-c076-4bf4-b62b-0bab9dd21102
 Request Method: GET
 Request Headers
 ...
 Content-type: application/json+nxentity
 enrichers.document: pendingTasks
 properties: dublincore

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "pendingTasks": [{
      "actors": [{
        "id": "Administrator"
      }],
      "comments": [],
      "created": "2016-05-28T22:00:00.12Z",
      "directive": "wf.parallelDocumentReview.consolidate.directive",
      "dueDate": "2016-06-02T22:00:00.12Z",
      "entity-type": "task",
      "id": "18b6767a-990e-4d7d-870c-ba20494fe3b6",
      "name": "wf.parallelDocumentReview.consolidate.title",
      "nodeName": "Task2169",
      "state": "opened",
      "targetDocumentIds": [{
        "id": "d6b4be3e-e1e9-454b-812d-c156d1c2e96a"
      }],
      "taskInfo": {
        ...
      },
      "variables": {
        "assignees": [],
        "comment": null,
        "review_result": ""
      },
      "workflowInstanceId": "75dfb9e0-65dd-4150-9d66-ade0597e27c2",
      "workflowModelName": "ParallelDocumentReview"
    }]
  }
}

Contributing Your Own Content Enricher

You can add your own content enricher by providing a Java class and a XML contribution. You can enrich a Nuxeo Document Model or any kind of specific object returned.

Document Model Content Enricher

Here is a sample to get you started. It provides a document's parent ID, title and description.

<?xml version="1.0" encoding="UTF-8"?>
    <component name="org.nuxeo.sample.enrichers.parentDocEnricher">
        <!-- Start copying here if you declare the enricher in Nuxeo Studio -->
        <extension target="org.nuxeo.ecm.core.io.MarshallerRegistry" point="marshallers">
            <register class="org.nuxeo.university.enrichers.ParentDocEnricher" enable="true" />
        </extension>
        <!-- Stop copying here if you declare the enricher in Nuxeo Studio -->
    </component>

package org.nuxeo.sample.enrichers;

import static org.nuxeo.ecm.core.io.registry.reflect.Instantiations.SINGLETON;
import static org.nuxeo.ecm.core.io.registry.reflect.Priorities.REFERENCE;

import java.io.IOException;

import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
import org.nuxeo.ecm.core.api.CoreSession;
import org.nuxeo.ecm.core.api.DocumentModel;

// The class is instantiated as a singleton
// Priority defines which marshaller is used in case of conflict. Priority is an integer.
// The higher the number, the higher the priority: 10 > 1 for instance.

@Setup(mode = SINGLETON, priority = REFERENCE)
public class ParentDocEnricher extends AbstractJsonEnricher<DocumentModel> {

// The enricher is called using enrichers.document: parentDoc
    public static final String NAME = "parentDoc";

    public ParentDocEnricher() {
        super(NAME);
    }

// Method that is called when the enricher is called
    @Override
    public void write(JsonGenerator jg, DocumentModel doc) throws IOException {
      ObjectNode parentDocJsonObject = addParentDocAsJson(doc);
      jg.writeFieldName(NAME);
      jg.writeObject(parentDocJsonObject);
    }

    private ObjectNode addParentDocAsJson(DocumentModel doc) {
      ObjectMapper o = new ObjectMapper();

      // First create the parent document's JSON object content
      CoreSession session = doc.getCoreSession();
      DocumentModel parentDoc = session.getDocument(doc.getParentRef());

      ObjectNode parentObject = o.createObjectNode();
      parentObject.put("id", parentDoc.getRef().toString());
      parentObject.put("title", parentDoc.getTitle());
      parentObject.put("description", parentDoc.getPropertyValue("dc:description").toString());

      return parentObject;
    }
}

Specific Object Content Enricher

An example with a content enricher for the object org.nuxeo.ecm.platform.audit.api.LogEntry:

<?xml version="1.0" encoding="UTF-8"?>
    <component name="org.nuxeo.sample.enrichers.logEntryEnricher">
        <!-- Start copying here if you declare the enricher in Nuxeo Studio -->
        <extension target="org.nuxeo.ecm.core.io.MarshallerRegistry"
           point="marshallers">
           <register class="org.nuxeo.sample.enrichers.LogEntryEnricher" enable="true" />
        </extension>
        <!-- Stop copying here if you declare the enricher in Nuxeo Studio -->
    </component>

package org.nuxeo.sample.enrichers;
import static org.nuxeo.ecm.core.io.registry.reflect.Instantiations.SINGLETON;
import static org.nuxeo.ecm.core.io.registry.reflect.Priorities.REFERENCE;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;

import org.codehaus.jackson.JsonGenerator;
import org.nuxeo.ecm.core.api.CoreInstance;
import org.nuxeo.ecm.core.api.CoreSession;
import org.nuxeo.ecm.core.api.DocumentModel;
import org.nuxeo.ecm.core.api.IdRef;
import org.nuxeo.ecm.core.api.NuxeoPrincipal;
import org.nuxeo.ecm.core.io.marshallers.json.enrichers.AbstractJsonEnricher;
import org.nuxeo.ecm.core.io.registry.reflect.Setup;
import org.nuxeo.ecm.platform.audit.api.LogEntry;
import org.nuxeo.ecm.platform.usermanager.UserManager;
import org.nuxeo.runtime.api.Framework;

import com.google.common.base.Strings;

@Setup(mode = SINGLETON, priority = REFERENCE)
public class LogEntryEnricher extends AbstractJsonEnricher<LogEntry> {

    public static final String NAME = "sfLogEntry";

    public LogEntryEnricher() {
        super(NAME);
    }

    @Override
    public void write(JsonGenerator jsonGenerator, LogEntry logEntry) throws IOException {
        CoreSession session = CoreInstance.openCoreSession(logEntry.getRepositoryId());
        DocumentModel targetDocument = session.getDocument(new IdRef(logEntry.getDocUUID()));
        Date creationDate = ((GregorianCalendar) targetDocument.getPropertyValue("dc:created")).getTime();
        Date modificationDate = ((GregorianCalendar) targetDocument.getPropertyValue("dc:modified")).getTime();

        jsonGenerator.writeObjectFieldStart(NAME);
        jsonGenerator.writeObjectField("contact", getPrincipalName(logEntry));
        jsonGenerator.writeObjectField("creation", new SimpleDateFormat("yyyy-MM-dd").format(creationDate));
        jsonGenerator.writeObjectField("modification", new SimpleDateFormat("yyyy-MM-dd").format(modificationDate));
        jsonGenerator.writeEndObject();
    }

    protected String getPrincipalName(LogEntry logEntry) {
        UserManager userManager = Framework.getLocalService(UserManager.class);
        NuxeoPrincipal principal = userManager.getPrincipal(logEntry.getPrincipalName());
        String firstName = principal.getFirstName();
        String lastName = principal.getLastName();
        if (Strings.isNullOrEmpty(firstName) && Strings.isNullOrEmpty(lastName)) {
            return principal.getName();
        } else {
            return firstName + " " + lastName;
        }
    }
}

REST Request Header

Don't forget to set the proper header to use this enricher:

enrichers.logEntry = sfLogEntry

JSON Response Example

{
  "entity-type": "document",
  "repository": "default",
  "uid": "4246ca87-c076-4bf4-b62b-0bab9dd21102",
  "path": "/default-domain/workspaces/Marketing/photo.jpg",
  "type": "Picture",
  "state": "project",
  "parentRef": "036f99ec-a500-4a1e-9d89-e8eb656a0ff7",
  "isCheckedOut": true,
  "changeToken": "1426696491000",
  "title": "photo.jpg",
  "lastModified": "2015-03-18T16:34:51.00Z",
  "properties": {
    "dc:description": "",
    ...
  },
  "facets": [
    "Versionable",
    ...
  ],
  "contextParameters": {
    "favorites": {
      "isFavorite": true
    }
  }
}

Learn More

Watch the video Using Content Enrichers as part of the REST API course at Hyland University.
Use Nuxeo CLI to bootstrap your Content Enricher.
Test these content enrichers on your local instance with Nuxeo API Playground (see documentation to configure your local instance).
Checkout the Nuxeo REST API explorer of your instance at http://NUXEO_SERVER/nuxeo/api/v1/doc.

Content Enrichers

Pluggable Context

Default Content Enrichers

How To Call a Content Enricher

Examples

Thumbnail

ACLs

Preview

Breadcrumb

Favorites

Collections

Tags

Running Workflows

Runnable Workflows

Pending Tasks

Contributing Your Own Content Enricher

Document Model Content Enricher

Specific Object Content Enricher

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