Changeset 31912 for main/trunk/greenstone3/src/java/org/greenstone/gsdl3/service/OAIPMH.java

Timestamp:

2017-08-21T18:03:37+12:00 (7 years ago)

Author:

ak19

Message:

Now GS3 tries to obtain the _earliesttimestamp entry of the oai-inf.db for each collection to, work out the earliest among them to be the earliest timestamp of the repository. For each collection, if there is no such entry or the oai-inf db doesn't exist or can't be accessed, the collection falls back to using the value in the build config file as before. Also as before, if that doesn't exist either, it uses the lastmod date of the collection (I think also taken from build config) as the next fallback value.

File:

• main/trunk/greenstone3/src/java/org/greenstone/gsdl3/service/OAIPMH.java (modified) (1 diff)

main/trunk/greenstone3/src/java/org/greenstone/gsdl3/service/OAIPMH.java

@@ -233 +233 @@
   }
 
+    /**
+     * @return the associated OAICollection's OAI_EARLIEST_TIMESTAMP_OID record's 
+     * OAI_INF_TIMESTAMP field from the collection's oai-inf.db IN MILLISECONDS
+     */
+    public long getEarliestTimestamp() {
+    long timestamp = -1;
+    
+    DBInfo oai_info = null;
+    if(oaiinf_db != null) {
+        // get internal record containing the earliest timestamp of the collection
+        oai_info = this.oaiinf_db.getInfo(OAIXML.OAI_EARLIEST_TIMESTAMP_OID);
+        if (oai_info == null) {
+        logger.warn("Can't get collection " + this.cluster_name + "'s earliest timestamp from oai-inf db. No entry for 'OID' " + OAIXML.OAI_EARLIEST_TIMESTAMP_OID + " in the db.");        
+        } else {
+        timestamp = Long.parseLong(oai_info.getInfo(OAIXML.OAI_INF_TIMESTAMP)) * 1000; // stored in seconds, so x1000 to  convert to milliseconds
+        //logger.info("@@@ found earliest OAI timestamp for collection " + this.coll_name + ": " + timestamp + " (ms)");
+        }
+    }
+    return timestamp;
+    }
+    
   protected Element findNamedMetadataFormat(Element list_meta_formats, String prefix) {
     NodeList formats = list_meta_formats.getElementsByTagName(OAIXML.METADATA_FORMAT);