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Camel makes use of "components" to integrate various services using a terse, domain specific language that can be expressed in JAVA, XML, Scala or Groovy. There exists one such component designed to work specifically with a Fedora4 repository. This makes it possible to model Solr indexing in only a few lines of code like so:
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from("activemq:topic:fedora") .to("fcrepo:localhost:8080/fedora/rest") .filter() .xpathXPathBuilder xpath = new XPathBuilder("/rdf:RDF/rdf:Description/rdf:type[@rdf:resource='http://fedora.info/definitions/v4/rest-api#indexable']", namespaces) xpath.namespace("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#") from("activemq:topic:fedora") .to("fcrepo:localhost:8080/fedora/rest") .filter(xpath) .to("fcrepo:localhost:8080/fedora/rest?accept=application/json&transform=default") .to("http4:localhost:8080/solr/core/update"); |
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