Fedora generates event messages when a resource is created, updated or deleted.
The messages are composed for headers and body.
Message Headers
| Header | Description | Values | Sample Value |
|---|---|---|---|
org.fcrepo.jms.user | The Fedora user who made the change. | bypassAdmin | |
org.fcrepo.jms.eventID | A UUID associated with the event | urn:uuid:d0f9d030-8fac-474c-882c-0858a7f948ef | |
org.fcrepo.jms.identifier | The identifier portion of the URI of the changed resource | /test1234 | |
org.fcrepo.jms.timestamp | Timestamp in epoch time (milliseconds since January 1st, 1970) | 1519419333657 | |
org.fcrepo.jms.baseURL | The base portion of the identifiers URI. | http://localhost:8080/rest | |
org.fcrepo.jms.resourceType | A comma separated list of URIs identifying the types that describe the resource that changed. | http://www.w3.org/ns/ldp#Container,http://fedora.info/definitions/v4/repository#Resource, http://fedora.info/definitions/v4/repository#Container,http://www.w3.org/ns/ldp#RDFSource | |
org.fcrepo.jms.eventType | A comma separated list of URIs identifying the event types that describe the resource that changed. | http://fedora.info/definitions/v4/event#ResourceCreation http://fedora.info/definitions/v4/event#ResourceModification http://fedora.info/definitions/v4/event#ResourceDeletion | http://fedora.info/definitions/v4/event#ResourceCreation, http://fedora.info/definitions/v4/event#ResourceModification |
org.fcrepo.jms.userAgent | The type of client user agent that was used to effect the change to the resource. | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 |
Message Body
The format of the body is JSON-LD.
Below is an example of a message emitted on resource creation.
{"id":"http://localhost:8080/rest/test1234",
"type": [
"http://www.w3.org/ns/ldp#Container",
"http://fedora.info/definitions/v4/repository#Resource",
"http://fedora.info/definitions/v4/repository#Container",
"http://www.w3.org/ns/ldp#RDFSource",
"http://www.w3.org/ns/prov#Entity"],
"isPartOf":"http://localhost:8080/rest",
"wasGeneratedBy":{"type":["http://fedora.info/definitions/v4/event#ResourceCreation",
"http://fedora.info/definitions/v4/event#ResourceModification",
"http://www.w3.org/ns/prov#Activity"],
"identifier":"urn:uuid:d0f9d030-8fac-474c-882c-0858a7f948ef",
"atTime":"2018-02-23T20:55:33.657Z"},
"wasAttributedTo":[{"type":"http://www.w3.org/ns/prov#Person","name":"bypassAdmin"},
{"type":"http://www.w3.org/ns/prov#SoftwareAgent","name":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}],
"@context":{"prov":"http://www.w3.org/ns/prov#",
"foaf":"http://xmlns.com/foaf/0.1/",
"dcterms":"http://purl.org/dc/terms/",
"xsd":"http://www.w3.org/2001/XMLSchema#",
"type":"@type",
"id":"@id",
"name":{"@id":"foaf:name","@type":"xsd:string"},
"identifier":{"@id":"dcterms:identifier","@type":"@id"},
"isPartOf":{"@id":"dcterms:isPartOf","@type":"@id"},
"atTime":{"@id":"prov:atTime","@type":"xsd:dateTime"},
"wasAttributedTo":{"@id":"prov:wasAttributedTo","@type":"@id"},
"wasGeneratedBy":{"@id":"prov:wasGeneratedBy","@type":"@id"}
}
}
Below is an example of a message emitted on resource update.
{ ...
"wasGeneratedBy":{"type":["http://fedora.info/definitions/v4/event#ResourceModification","http://www.w3.org/ns/prov#Activity"],
"identifier":"urn:uuid:d0f9d030-8fac-474c-882c-0858a7f948ef",
"atTime":"2018-02-23T20:55:33.657Z"},
...
}
Below is an example of a message emitted on resource deletion.
{ ...
"wasGeneratedBy":{"type":["http://fedora.info/definitions/v4/event#ResourceDeletion","http://www.w3.org/ns/prov#Activity"],
"identifier":"urn:uuid:d0f9d030-8fac-474c-882c-0858a7f948ef",
"atTime":"2018-02-23T20:55:33.657Z"},
...
}
See :
