1 package org.collectionspace.services.listener;
3 import java.util.ArrayList;
4 import java.util.IllegalFormatException;
6 import org.apache.commons.logging.Log;
7 import org.apache.commons.logging.LogFactory;
8 import org.collectionspace.services.client.workflow.WorkflowClient;
9 import org.nuxeo.ecm.core.api.ClientException;
10 import org.nuxeo.ecm.core.api.CoreSession;
11 import org.nuxeo.ecm.core.api.DocumentModel;
12 import org.nuxeo.ecm.core.api.DocumentModelList;
13 import org.nuxeo.ecm.core.api.impl.LifeCycleFilter;
14 import org.nuxeo.ecm.core.event.Event;
15 import org.nuxeo.ecm.core.event.EventContext;
16 import org.nuxeo.ecm.core.event.EventListener;
17 import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
19 public class UpdateRelationsOnDelete implements EventListener {
21 // FIXME: Get these constant values from external sources rather than redeclaring here
22 final static String RELATIONS_COMMON_SUBJECT_CSID_FIELD = "relations_common:subjectCsid";
23 final static String RELATIONS_COMMON_OBJECT_CSID_FIELD = "relations_common:objectCsid";
25 // FIXME: We might experiment here with using log4j instead of Apache Commons Logging;
26 // am using the latter to follow Ray's pattern for now
27 final Log logger = LogFactory.getLog(UpdateRelationsOnDelete.class);
30 public void handleEvent(Event event) throws ClientException {
31 logger.trace("In handleEvent in UpdateRelationsOnDelete ...");
33 EventContext eventContext = event.getContext();
35 if (isDocumentSoftDeletedEvent(eventContext)) {
37 logger.trace("A soft deletion event was received by UpdateRelationsOnDelete ...");
39 DocumentEventContext docContext = (DocumentEventContext) eventContext;
40 DocumentModel docModel = docContext.getSourceDocument();
42 // Retrieve a list of relation records, where the soft deleted
43 // document provided in the context of the current event is
44 // either the subject or object of any relation
46 // Build a query string
47 String csid = docModel.getName();
52 String.format("SELECT * FROM Relation WHERE ecm:isProxy = 0 AND (%1$s='%3$s' OR %2$s='%3$s')",
53 RELATIONS_COMMON_SUBJECT_CSID_FIELD, RELATIONS_COMMON_OBJECT_CSID_FIELD, csid);
54 logger.trace("Query string=" + queryString);
55 } catch (IllegalFormatException ife) {
56 logger.warn("Construction of formatted query string failed: ", ife);
57 logger.warn("Actions in this event listener will NOT be performed, as a result of a previous Exception.");
61 // Create a filter to exclude from the list results any records
62 // that have already been soft deleted or are locked
63 List<String> workflowStatesToFilter = new ArrayList<String>();
64 workflowStatesToFilter.add(WorkflowClient.WORKFLOWSTATE_DELETED);
65 workflowStatesToFilter.add(WorkflowClient.WORKFLOWSTATE_LOCKED);
66 LifeCycleFilter workflowStateFilter = new LifeCycleFilter(null, workflowStatesToFilter);
68 // Perform the filtered query
69 CoreSession session = docModel.getCoreSession();
70 DocumentModelList matchingDocuments;
72 matchingDocuments = session.query(queryString.toString(), workflowStateFilter);
73 } catch (ClientException ce) {
74 logger.warn("Error attempting to retrieve relation records where "
75 + "record of type '" + docModel.getType() + "' with CSID " + csid
76 + " is the subject or object of any relation: " + ce.getMessage());
80 // Cycle through the list results, soft deleting each matching relation record
81 logger.info("Attempting to soft delete " + matchingDocuments.size() + " relation records pertaining to a soft deleted record.");
82 for (DocumentModel doc : matchingDocuments) {
83 doc.followTransition(WorkflowClient.WORKFLOWTRANSITION_DELETE);
90 // FIXME: Generic methods like the following might be split off
91 // into an event utilities class. - ADR 2012-12-05
94 * Identifies whether a supplied event concerns a document that has
95 * been transitioned to the 'deleted' workflow state.
97 * @param eventContext an event context
99 * @return true if this event concerns a document that has
100 * been transitioned to the 'deleted' workflow state.
102 private boolean isDocumentSoftDeletedEvent(EventContext eventContext) {
103 boolean isSoftDeletedEvent = false;
104 if (eventContext instanceof DocumentEventContext) {
105 if (eventContext.getProperties().containsKey(WorkflowClient.WORKFLOWTRANSITION_TO)
106 && eventContext.getProperties().get(WorkflowClient.WORKFLOWTRANSITION_TO).equals(WorkflowClient.WORKFLOWSTATE_DELETED)) {
107 isSoftDeletedEvent = true;
110 return isSoftDeletedEvent;