Changeset 25909 for gs3-extensions/solr

Timestamp:

2012-07-06T18:01:29+12:00 (12 years ago)

Author:

ak19

Message:

Making SolrSearch uptodate with the changes to GS2SolrSearch. SolrSearch remains untested.

File:

• gs3-extensions/solr/trunk/src/src/java/org/greenstone/gsdl3/service/SolrSearch.java (modified) (8 diffs)

gs3-extensions/solr/trunk/src/src/java/org/greenstone/gsdl3/service/SolrSearch.java

@@ -15 +15 @@
 import java.util.HashMap;
 import java.util.ArrayList;
+import java.util.Iterator;
 
 
@@ -29 +30 @@
 import org.apache.solr.servlet.SolrRequestParsers;
 import org.apache.solr.core.CoreContainer;
+import org.apache.solr.core.SolrCore;
 
 import java.io.File;
@@ -56 +58 @@
         
         String solr_home_str = GSFile.extHome(gsdl3_home,solr_ext_name);
-        File solr_home = new File(solr_home_str);
-        File solr_xml = new File( solr_home,"solr.xml" );
-
-        solr_cores = new CoreContainer(solr_home_str,solr_xml);             
+
+        solr_cores = new CoreContainer(solr_home_str);
         }
         catch (Exception e) {
@@ -66 +66 @@
     }
     }
+    
 
     // Overriding the cleanUp() method here, so as to parallel the structure of GS2SolrSearch 
@@ -71 +72 @@
     // However, this class has not yet been tested, so it's not certain that this method is 
     // required here.
+    // Adjusted  to bring it up to speed with changes in GS2SolrSearch (for activate.pl) - not yet tested
     public void cleanUp() {
     super.cleanUp();
-    solr_cores.shutdown();
-    }
-
+    
+        // 1. clear the map keeping track of the solrcores' EmbeddedSolrServers in this collection
+        solr_server.clear();
+
+        // 2. Remove all SolrCores in the CoreContainer (solr_cores) that are specific to this collection
+        String collection_core_name_prefix = getCollectionCoreNamePrefix();
+
+        Collection<String> coreNames = solr_cores.getCoreNames();
+        if(!coreNames.isEmpty()) {
+            Iterator<String> coreIterator = coreNames.iterator();
+            while(coreIterator.hasNext()) {
+
+            String solrCoreName = coreIterator.next();      
+            if(solrCoreName.startsWith(collection_core_name_prefix)) {
+
+                logger.error("**** Removing collection-specific core: " + solrCoreName + " from CoreContainer");
+
+                // CoreContainer.remove(String name): removes and returns registered core w/o decrementing it's reference count
+                // http://lucene.apache.org/solr/api/index.html?org/apache/solr/core/CoreContainer.html
+                SolrCore solr_core = solr_cores.remove(solrCoreName);
+                while(!solr_core.isClosed()) {
+                logger.error("@@@@@@ " + solrCoreName + " was not closed. Closing....");
+                solr_core.close(); // http://lucene.apache.org/solr/api/org/apache/solr/core/SolrCore.html
+                } 
+                if(solr_core.isClosed()) {
+                logger.error("@@@@@@ " + solrCoreName + " is closed.");
+                }
+                solr_core = null;
+            }
+            }
+        }
+
+        // 3. if there are no more solr cores in Greenstone, then solr_cores will be empty, null the CoreContainer
+        // All going well, this will happen when we're ant stopping the Greenstone server and the last Solr collection
+        // is being deactivated
+        Collection<String> coreNamesRemaining = solr_cores.getCoreNames();
+        if(coreNamesRemaining.isEmpty()) {
+            logger.error("**** CoreContainer contains 0 solrCores. Shutting down...");
+
+            solr_cores.shutdown(); // wouldn't do anything anyway for 0 cores I think
+            solr_cores = null;
+        } 
+        else { // else part is just for debugging
+            Iterator coreIterator = coreNamesRemaining.iterator();
+            while(coreIterator.hasNext()) {
+            logger.error("**** Core: " + coreIterator.next() + " still exists in CoreContainer");
+            }
+        }
+    
+    }
+
+    
+    // adjusted configure to bring it up to speed with changes in GS2SolrSearch (for activate.pl) - not yet tested
     public boolean configure(Element info, Element extra_info) {
-    if (!super.configure(info, extra_info)){
-        return false;
-    }
+        boolean success = super.configure(info, extra_info);
+    
+        // 1. Make the CoreContainer reload solr.xml
+        // This is particularly needed for when activate.pl is executed during
+        // a running GS3 server. At that point, the solr collection is reactivated and 
+        // we need to tell Greenstone that the solr index has changed. This requires
+        // the CoreContainer to reload the solr.xml file, and it all works again.
+
+        solr_server.clear(); // clear the map of solr cores for this collection added to the map upon querying
+        
+        // Reload the updated solr.xml into the CoreContainer
+        // (Doing a solr_cores.shutdown() first doesn't seem to be required)
+        try {   
+            String solr_home_str = solr_cores.getSolrHome();
+            File solr_home = new File(solr_home_str);
+            File solr_xml = new File( solr_home,"solr.xml" );
+            
+            solr_cores.load(solr_home_str,solr_xml);            
+        } catch (Exception e) {
+            logger.error("Exception in SolrSearch.configure(): " + e.getMessage());
+            e.printStackTrace();
+            return false;
+        }
 
     // initialize required number of SolrCores based on values
     // in 'index_ids' that are set by LuceneSearch::configure()
 
-    String site_name = this.router.getSiteName();
-    String coll_name = this.cluster_name;
+    String core_name_prefix = getCollectionCoreNamePrefix();
 
     for (int i=0; i<index_ids.size(); i++) {
 
         String idx_name = (String)index_ids.get(i);
-        String core_name = site_name + "-" + coll_name + "-" + idx_name;
+        String core_name = core_name_prefix + "-" + idx_name;
 
         EmbeddedSolrServer solr_core
@@ -98 +169 @@
     }
 
-    return true;
+    return success;
     }
     
@@ -139 +210 @@
         //solrParams.set("rows", nbDocuments);
 
-        String site_name = this.router.getSiteName();
-        String coll_name = this.cluster_name;
-
-        String core_name = site_name + "-" + coll_name + "-" + index;
+        String core_name = getCollectionCoreNamePrefix() + "-" + index;
 
         EmbeddedSolrServer solr_core = (EmbeddedSolrServer)solr_server.get(core_name);
@@ -176 +244 @@
     }
 
+    protected String getCollectionCoreNamePrefix() {
+        String site_name = this.router.getSiteName();
+        String coll_name = this.cluster_name;
+        String collection_core_name_prefix = site_name + "-" + coll_name;
+        return collection_core_name_prefix;
+    }
     
 }