SOLR-14307: User defined "<cache/>" entries in solrconfig.xml now support enabled="true|false" just like core searcher caches.

solr/CHANGES.txt

@@ -74,6 +74,9 @@ Improvements
 
 * SOLR-14329: Add support to choose collapse group to expand in ExpandComponent based on cost (Munendra S N)
 
+* SOLR-14307: User defined "<cache/>" entries in solrconfig.xml now support enabled="true|false" just like
+  core searcher caches. (hossman)
+
 Optimizations
 ---------------------
 * SOLR-8306: Do not collect expand documents when expand.rows=0 (Marshall Sanders, Amelia Henderson)

solr/core/src/java/org/apache/solr/search/CacheConfig.java

@@ -80,8 +80,12 @@ public class CacheConfig implements MapSerializable{
     if (nodes == null || nodes.getLength() == 0) return new LinkedHashMap<>();
     Map<String, CacheConfig> result = new HashMap<>(nodes.getLength());
     for (int i = 0; i < nodes.getLength(); i++) {
-      CacheConfig config = getConfig(solrConfig, nodes.item(i).getNodeName(), DOMUtil.toMap(nodes.item(i).getAttributes()), configPath);
-      result.put(config.args.get(NAME), config);
+      Node node = nodes.item(i);
+      if ("true".equals(DOMUtil.getAttrOrDefault(node, "enabled", "true"))) {
+        CacheConfig config = getConfig(solrConfig, node.getNodeName(),
+                                       DOMUtil.toMap(node.getAttributes()), configPath);
+        result.put(config.args.get(NAME), config);
+      }
     }
     return result;
   }

solr/core/src/test-files/solr/collection1/conf/solrconfig-cache-enable-disable.xml

@@ -53,7 +53,17 @@
       initialSize="512"
       autowarmCount="0"/>
 
+    <cache
+      name="user_definied_cache_XXX"
+      enabled="${user_definied_cache_XXX.enabled:false}"  
+      />
+    <cache
+      name="user_definied_cache_ZZZ"
+      enabled="${user_definied_cache_ZZZ.enabled:false}"  
+      />
 
+
+    
     <!-- If true, stored fields that are not requested will be loaded lazily.
     -->
     <enableLazyFieldLoading>true</enableLazyFieldLoading>

solr/core/src/test/org/apache/solr/core/TestConfig.java

@@ -20,6 +20,7 @@ import javax.xml.xpath.XPathConstants;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.LinkedHashMap;
+import java.util.Collections;
 
 import org.apache.lucene.index.ConcurrentMergeScheduler;
 import org.apache.lucene.index.IndexWriterConfig;
@@ -29,6 +30,7 @@ import org.apache.solr.SolrTestCaseJ4;
 import org.apache.solr.handler.admin.ShowFileRequestHandler;
 import org.apache.solr.schema.IndexSchema;
 import org.apache.solr.schema.IndexSchemaFactory;
+import org.apache.solr.search.CacheConfig;
 import org.apache.solr.update.SolrIndexConfig;
 import org.junit.Assert;
 import org.junit.BeforeClass;
@@ -114,25 +116,45 @@ public class TestConfig extends SolrTestCaseJ4 {
    assertNull(sc.filterCacheConfig);
    assertNull(sc.queryResultCacheConfig);
    assertNull(sc.documentCacheConfig);
+   //
+   assertNotNull(sc.userCacheConfigs);
+   assertEquals(Collections.<String, CacheConfig>emptyMap(), sc.userCacheConfigs);
    
-   // enable all the caches via system properties and verify 
+   // enable all the core caches (and one user cache) via system properties and verify 
    System.setProperty("filterCache.enabled", "true");
    System.setProperty("queryResultCache.enabled", "true");
    System.setProperty("documentCache.enabled", "true");
+   System.setProperty("user_definied_cache_XXX.enabled","true");
+   // user_definied_cache_ZZZ.enabled defaults to false in config
+   
    sc = new SolrConfig(TEST_PATH().resolve("collection1"), "solrconfig-cache-enable-disable.xml");
    assertNotNull(sc.filterCacheConfig);
    assertNotNull(sc.queryResultCacheConfig);
    assertNotNull(sc.documentCacheConfig);
+   //
+   assertNotNull(sc.userCacheConfigs);
+   assertEquals(1, sc.userCacheConfigs.size());
+   assertNotNull(sc.userCacheConfigs.get("user_definied_cache_XXX"));
    
-   // disable all the caches via system properties and verify
+   // disable all the core caches (and enable both user caches) via system properties and verify
    System.setProperty("filterCache.enabled", "false");
    System.setProperty("queryResultCache.enabled", "false");
    System.setProperty("documentCache.enabled", "false");
+   System.setProperty("user_definied_cache_XXX.enabled","true");
+   System.setProperty("user_definied_cache_ZZZ.enabled","true");
+
    sc = new SolrConfig(TEST_PATH().resolve("collection1"), "solrconfig-cache-enable-disable.xml");
    assertNull(sc.filterCacheConfig);
    assertNull(sc.queryResultCacheConfig);
    assertNull(sc.documentCacheConfig);
+   //
+   assertNotNull(sc.userCacheConfigs);
+   assertEquals(2, sc.userCacheConfigs.size());
+   assertNotNull(sc.userCacheConfigs.get("user_definied_cache_XXX"));
+   assertNotNull(sc.userCacheConfigs.get("user_definied_cache_ZZZ"));
    
+   System.clearProperty("user_definied_cache_XXX.enabled");
+   System.clearProperty("user_definied_cache_ZZZ.enabled");
    System.clearProperty("filterCache.enabled");
    System.clearProperty("queryResultCache.enabled");
    System.clearProperty("documentCache.enabled");