Add event allowing to index additional information (#6117)

core/src/main/java/org/fao/geonet/kernel/datamanager/base/BaseMetadataIndexer.java

@@ -37,6 +37,7 @@
 import org.fao.geonet.domain.userfeedback.RatingsSetting;
 import org.fao.geonet.events.history.RecordDeletedEvent;
 import org.fao.geonet.events.md.MetadataIndexCompleted;
+import org.fao.geonet.events.md.MetadataIndexStarted;
 import org.fao.geonet.kernel.*;
 import org.fao.geonet.kernel.datamanager.IMetadataIndexer;
 import org.fao.geonet.kernel.datamanager.IMetadataManager;
@@ -526,6 +527,10 @@ public void indexMetadata(final String metadataId, final boolean forceRefreshRea
 
                 fields.putAll(addExtraFields(fullMd));
 
+                if (fullMd != null) {
+                    this.publisher.publishEvent(new MetadataIndexStarted(fullMd, fields));
+                }
+
                 searchManager.index(schemaManager.getSchemaDir(schema), md, indexKey, fields, metadataType, forceRefreshReaders);
             }
         } catch (Exception x) {

events/src/main/java/org/fao/geonet/events/md/MetadataIndexStarted.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2001-2022 Food and Agriculture Organization of the
+ * United Nations (FAO-UN), United Nations World Food Programme (WFP)
+ * and United Nations Environment Programme (UNEP)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
+ * Rome - Italy. email: geonetwork@osgeo.org
+ */
+
+package org.fao.geonet.events.md;
+
+import com.google.common.collect.Multimap;
+import org.fao.geonet.domain.AbstractMetadata;
+import org.fao.geonet.domain.Metadata;
+
+/**
+ * Event launched when the indexation of a metadata record started, but not yet committed,
+ * allowing to update the fields for indexing.
+ *
+ */
+public class MetadataIndexStarted extends MetadataEvent {
+
+    private static final long serialVersionUID = 5119421930299384126L;
+
+    private Multimap<String, Object> indexFields;
+
+    public MetadataIndexStarted(AbstractMetadata metadata, Multimap<String, Object> indexFields) {
+        super(metadata);
+        this.indexFields = indexFields;
+    }
+
+    public Multimap<String, Object> getIndexFields() {
+        return indexFields;
+    }
+}