Changeset 31912

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.

Location:

main/trunk/greenstone3/src/java/org/greenstone/gsdl3

Files:

• collection/OAICollection.java (modified) (1 diff)
• core/OAIReceptionist.java (modified) (1 diff)
• service/OAIPMH.java (modified) (1 diff)
• util/OAIResumptionToken.java (modified) (7 diffs)

main/trunk/greenstone3/src/java/org/greenstone/gsdl3/collection/OAICollection.java

@@ -150 +150 @@
       // pass the xml node to the service for configuration
       if (this.oai_service_rack.configure(oai_service_xml, extra_info)) {
+
+          // once we've configured the OAIPMH service, we can use the OAIPMH service to
+          // retrieve the earliest timestamp of the collection from the oai-inf db and
+          // overwrite Collection.earliestDatestamp with it.
+          long earliestTimestamp = this.oai_service_rack.getEarliestTimestamp();
+          if(earliestTimestamp == -1) {
+          //this.earliestDatestamp = -1;
+          logger.warn("No OAI timestamp for collection " + this.cluster_name
+                  + ". Falling back to using its earliestDatestamp from build config: " + this.earliestDatestamp);
+          } else {
+          this.earliestDatestamp = earliestTimestamp; // milliseconds
+          }
+          
         
         // find out the supported service types for this service module

main/trunk/greenstone3/src/java/org/greenstone/gsdl3/core/OAIReceptionist.java

@@ -239 +239 @@
     // send to MR
     msg_node = mr.process(message);
-    logger.info("*** " + XMLConverter.getPrettyString(msg_node));
+    //logger.info("*** " + XMLConverter.getPrettyString(msg_node));
     NodeList response_list =  ((Element)msg_node).getElementsByTagName(GSXML.RESPONSE_ELEM);
     for (int c=0; c<response_list.getLength(); c++) {

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);

main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/OAIResumptionToken.java

@@ -161 +161 @@
     if (token.indexOf(":") != -1) {
       token = token.substring(0, token.indexOf(":"));
-      logger.error("looking up "+token);
+      logger.info("looking up "+token);
     }
     if (stored_tokens.containsKey(token)) {
@@ -174 +174 @@
     if (token.indexOf(":") != -1) {
       base_name = token.substring(0, token.indexOf(":"));
-      logger.error("getting data for "+base_name);
+      logger.info("getting data for "+base_name);
     }
     HashMap<String, String> data = new HashMap<String, String>(stored_tokens.get(base_name));
     if (data == null) { 
-      logger.error("data was null!!");
+      logger.warn("data was null!!");
       return null;
     }
@@ -211 +211 @@
     Iterator<Map.Entry<String,Long>> i = token_set.iterator();
     int size = expiration_data.size();
-    logger.error("start tokens "+size);
+    logger.info("start tokens "+size);
     Long time_now = System.currentTimeMillis();
     while (i.hasNext()==true) {
@@ -218 +218 @@
       Long exp = entry.getValue();
       if (exp < time_now) {
-    logger.error("token "+key+" is expired, "+ OAIXML.getTime(exp));
+    logger.info("token "+key+" is expired, "+ OAIXML.getTime(exp));
     i.remove();
     // also remove the token from the stored tokens
@@ -225 +225 @@
     }
     size = expiration_data.size();
-    logger.error("end tokens "+size);
+    logger.info("end tokens "+size);
   }
 
@@ -242 +242 @@
       }
     } catch (Exception e) {
-      logger.error("couldn't find or ResumptionToken.xml "+e.getMessage());
+      logger.error("couldn't find or work with ResumptionToken.xml "+e.getMessage());
     }
     // if we have got here, have't managed to load file via class loader -
@@ -287 +287 @@
     clearExpiredTokens();
     if (resumption_token_file == null) {
-      logger.error("no available resumption token file, not storing tokens");
+      logger.warn("no available resumption token file, not storing tokens");
       return false;
     }