001/*
002 * Copyright 2016 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.fcrepo.camel.fixity;
017
018import static org.slf4j.LoggerFactory.getLogger;
019
020import org.apache.camel.LoggingLevel;
021import org.apache.camel.builder.RouteBuilder;
022import org.apache.camel.builder.xml.Namespaces;
023import org.fcrepo.camel.RdfNamespaces;
024import org.slf4j.Logger;
025
026/**
027 * A content router for checking fixity of Binary resources.
028 *
029 * @author Aaron Coburn
030 * @since 2015-06-18
031 */
032public class FixityRouter extends RouteBuilder {
033
034    private static final Logger LOGGER = getLogger(FixityRouter.class);
035
036    /**
037     * Configure the message route workflow.
038     */
039    public void configure() throws Exception {
040
041        final Namespaces ns = new Namespaces("rdf", RdfNamespaces.RDF);
042        ns.add("premis", "http://www.loc.gov/premis/rdf/v1#");
043
044        /**
045         * A generic error handler (specific to this RouteBuilder)
046         */
047        onException(Exception.class)
048            .maximumRedeliveries("{{error.maxRedeliveries}}")
049            .log("Index Routing Error: ${routeId}");
050
051        /**
052         * Handle fixity events
053         */
054        from("{{fixity.stream}}")
055            .routeId("FcrepoFixity")
056            .to("fcrepo:{{fcrepo.baseUrl}}?preferInclude=ServerManged&accept=application/rdf+xml")
057            .filter().xpath(
058                    "/rdf:RDF/rdf:Description/rdf:type" +
059                    "[@rdf:resource='" + RdfNamespaces.REPOSITORY + "Binary']", ns)
060            .log(LoggingLevel.INFO, LOGGER,
061                    "Checking Fixity for ${headers[CamelFcrepoIdentifier]}")
062            .delay(simple("{{fixity.delay}}"))
063            .to("fcrepo:{{fcrepo.baseUrl}}?fixity=true&accept=application/rdf+xml")
064            .choice()
065                .when().xpath(
066                        "/rdf:RDF/rdf:Description/premis:hasEventOutcome" +
067                        "[text()='SUCCESS']", ns)
068                    .to("{{fixity.success}}")
069                .otherwise()
070                    .log(LoggingLevel.WARN, LOGGER,
071                        "Fixity error on ${headers[CamelFcrepoIdentifier]}")
072                    .to("{{fixity.failure}}");
073    }
074}