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dsmiley pushed a commit to branch branch_9x
in repository https://gitbox.apache.org/repos/asf/solr.git

commit 364c0afb5bc98460713e6ede071d375058e8de9c
Author: David Smiley <dsmi...@apache.org>
AuthorDate: Tue Dec 10 10:52:18 2024 -0500

    SOLR-14680: Deprecating org.apache.solr.cluster.api, includes NamedList 
methods (#2856)
    
    NamedList: deprecated methods: forEachEntry, forEachKey, 
abortableForEachKey, abortableForEach,
     asMap (no-arg only), get(key, default) -- all come from the SimpleMap 
interface.  Added getOrDefault.
    Deprecated the SimpleMap interface as well as the entirety of the SolrJ 
package org.apache.solr.cluster.api, which wasn't used except for SimpleMap.
    
    Includes some trivial refactorings to not call those deprecated methods.
    Includes internal changes to ConfigNode and friends so as to not use 
SimpleMap.
    
    (cherry picked from commit c80d41597c83c8c73634144ab8c55f8002dd101d)
---
 solr/CHANGES.txt                                   |   4 +
 .../core/src/java/org/apache/solr/cli/ApiTool.java |   2 +-
 .../src/java/org/apache/solr/cli/CreateTool.java   |  10 +-
 .../src/java/org/apache/solr/cli/DeleteTool.java   |   2 +-
 .../src/java/org/apache/solr/cli/StatusTool.java   |   5 +-
 .../org/apache/solr/core/OverlaidConfigNode.java   |   4 +-
 .../src/java/org/apache/solr/core/PluginInfo.java  |   2 +-
 .../java/org/apache/solr/core/SolrXmlConfig.java   |   7 +-
 .../java/org/apache/solr/schema/IndexSchema.java   |   2 +-
 .../java/org/apache/solr/search/CacheConfig.java   |   4 +-
 .../src/java/org/apache/solr/update/UpdateLog.java |   3 +-
 .../java/org/apache/solr/util/DOMConfigNode.java   |  11 +-
 .../java/org/apache/solr/util/DataConfigNode.java  | 116 +++++++++++++++------
 .../org/apache/solr/core/TestCodecSupport.java     |   3 +-
 .../solr/handler/RequestHandlerMetricsTest.java    |   7 +-
 .../handler/admin/CoreAdminHandlerActionTest.java  |   5 +-
 .../search/facet/SpatialHeatmapFacetsTest.java     |   8 +-
 .../org/apache/solr/common/LazySolrCluster.java    |   1 +
 .../java/org/apache/solr/common/SimpleZkMap.java   |   1 +
 .../solr/common/cloud/PerReplicaStatesOps.java     |   2 +-
 .../java/org/apache/solr/cluster/api/ApiType.java  |   1 +
 .../apache/solr/cluster/api/CollectionConfig.java  |   1 +
 .../org/apache/solr/cluster/api/HashRange.java     |   1 +
 .../java/org/apache/solr/cluster/api/Resource.java |   1 +
 .../java/org/apache/solr/cluster/api/Router.java   |   1 +
 .../java/org/apache/solr/cluster/api/Shard.java    |   1 +
 .../org/apache/solr/cluster/api/ShardReplica.java  |   1 +
 .../org/apache/solr/cluster/api/SimpleMap.java     |   8 ++
 .../org/apache/solr/cluster/api/SolrCluster.java   |   1 +
 .../apache/solr/cluster/api/SolrCollection.java    |   1 +
 .../java/org/apache/solr/cluster/api/SolrNode.java |   1 +
 .../org/apache/solr/cluster/api/package-info.java  |   1 +
 .../java/org/apache/solr/common/ConfigNode.java    |  11 +-
 .../org/apache/solr/common/cloud/DocRouter.java    |   6 +-
 .../apache/solr/common/cloud/PerReplicaStates.java |  26 ++---
 .../java/org/apache/solr/common/util/DOMUtil.java  |   2 +-
 .../org/apache/solr/common/util/NamedList.java     |   8 +-
 .../apache/solr/common/util/WrappedSimpleMap.java  |   1 +
 .../cloud/PerReplicaStatesIntegrationTest.java     |   6 +-
 39 files changed, 174 insertions(+), 104 deletions(-)

diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index f08bd159fe2..7b9a36db61c 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -173,6 +173,10 @@ led to the suppression of exceptions. (Andrey Bozhko)
 
 * SOLR-16781: "<lib/>" tags in solrconfig.xml are now quietly ignored by 
default unless explicitly enabled with the `SOLR_CONFIG_LIB_ENABLED=true` 
enviroment variable (or corresponding sysprop).  These tags are now considered 
deprecated and will be removed in Solr 10.
 
+* SOLR-14680: NamedList: deprecating methods: forEachEntry, forEachKey, 
abortableForEachKey, abortableForEach,
+ asMap (no-arg only), get(key, default).  Added getOrDefault.  Deprecated the 
SimpleMap interface as well as the
+ entirety of the SolrJ package org.apache.solr.cluster.api, which wasn't used 
except for SimpleMap.  (David Smiley)
+
 ==================  9.7.1 ==================
 Bug Fixes
 ---------------------
diff --git a/solr/core/src/java/org/apache/solr/cli/ApiTool.java 
b/solr/core/src/java/org/apache/solr/cli/ApiTool.java
index 1c412062ec8..f4fd3724032 100644
--- a/solr/core/src/java/org/apache/solr/cli/ApiTool.java
+++ b/solr/core/src/java/org/apache/solr/cli/ApiTool.java
@@ -108,7 +108,7 @@ public class ApiTool extends ToolBase {
       NamedList<Object> response = solrClient.request(req);
       // pretty-print the response to stdout
       CharArr arr = new CharArr();
-      new JSONWriter(arr, 2).write(response.asMap());
+      new JSONWriter(arr, 2).write(response.asMap(10));
       return arr.toString();
     }
   }
diff --git a/solr/core/src/java/org/apache/solr/cli/CreateTool.java 
b/solr/core/src/java/org/apache/solr/cli/CreateTool.java
index b2e7e063baa..f4d04fa45c9 100644
--- a/solr/core/src/java/org/apache/solr/cli/CreateTool.java
+++ b/solr/core/src/java/org/apache/solr/cli/CreateTool.java
@@ -23,7 +23,6 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
 import java.util.Locale;
-import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import org.apache.commons.cli.CommandLine;
@@ -219,10 +218,9 @@ public class CreateTool extends ToolBase {
 
     String coreRootDirectory; // usually same as solr home, but not always
 
-    Map<String, Object> systemInfo =
-        solrClient
-            .request(new GenericSolrRequest(SolrRequest.METHOD.GET, 
CommonParams.SYSTEM_INFO_PATH))
-            .asMap();
+    NamedList<?> systemInfo =
+        solrClient.request(
+            new GenericSolrRequest(SolrRequest.METHOD.GET, 
CommonParams.SYSTEM_INFO_PATH));
 
     // convert raw JSON into user-friendly output
     coreRootDirectory = (String) systemInfo.get("core_root");
@@ -375,7 +373,7 @@ public class CreateTool extends ToolBase {
     if (verbose) {
       // pretty-print the response to stdout
       CharArr arr = new CharArr();
-      new JSONWriter(arr, 2).write(response.asMap());
+      new JSONWriter(arr, 2).write(response.asMap(10));
       echo(arr.toString());
     }
     String endMessage =
diff --git a/solr/core/src/java/org/apache/solr/cli/DeleteTool.java 
b/solr/core/src/java/org/apache/solr/cli/DeleteTool.java
index 535b87ce1ff..fa44fe14b04 100644
--- a/solr/core/src/java/org/apache/solr/cli/DeleteTool.java
+++ b/solr/core/src/java/org/apache/solr/cli/DeleteTool.java
@@ -296,7 +296,7 @@ public class DeleteTool extends ToolBase {
     if (response != null) {
       // pretty-print the response to stdout
       CharArr arr = new CharArr();
-      new JSONWriter(arr, 2).write(response.asMap());
+      new JSONWriter(arr, 2).write(response.asMap(10));
       echo(arr.toString());
       echo("\n");
     }
diff --git a/solr/core/src/java/org/apache/solr/cli/StatusTool.java 
b/solr/core/src/java/org/apache/solr/cli/StatusTool.java
index 4a8322b1c54..3e2368a8d6a 100644
--- a/solr/core/src/java/org/apache/solr/cli/StatusTool.java
+++ b/solr/core/src/java/org/apache/solr/cli/StatusTool.java
@@ -365,13 +365,14 @@ public class StatusTool extends ToolBase {
     Map<String, String> cloudStatus = new LinkedHashMap<>();
     cloudStatus.put("ZooKeeper", (zkHost != null) ? zkHost : "?");
 
+    // TODO add booleans to request just what we want; not everything
     NamedList<Object> json = solrClient.request(new 
CollectionAdminRequest.ClusterStatus());
 
     List<String> liveNodes = (List<String>) json.findRecursive("cluster", 
"live_nodes");
     cloudStatus.put("liveNodes", String.valueOf(liveNodes.size()));
 
-    Map<String, Object> collections =
-        ((NamedList<Object>) json.findRecursive("cluster", 
"collections")).asMap();
+    // TODO get this as a metric from the metrics API instead, or something 
else.
+    var collections = (NamedList<Object>) json.findRecursive("cluster", 
"collections");
     cloudStatus.put("collections", String.valueOf(collections.size()));
 
     return cloudStatus;
diff --git a/solr/core/src/java/org/apache/solr/core/OverlaidConfigNode.java 
b/solr/core/src/java/org/apache/solr/core/OverlaidConfigNode.java
index 30561311dfc..c6fab13fef7 100644
--- a/solr/core/src/java/org/apache/solr/core/OverlaidConfigNode.java
+++ b/solr/core/src/java/org/apache/solr/core/OverlaidConfigNode.java
@@ -19,9 +19,9 @@ package org.apache.solr.core;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.function.Function;
 import java.util.function.Predicate;
-import org.apache.solr.cluster.api.SimpleMap;
 import org.apache.solr.common.ConfigNode;
 
 /** A config node impl which has an overlay */
@@ -80,7 +80,7 @@ class OverlaidConfigNode implements ConfigNode {
   }
 
   @Override
-  public SimpleMap<String> attributes() {
+  public Map<String, String> attributes() {
     return delegate.attributes();
   }
 
diff --git a/solr/core/src/java/org/apache/solr/core/PluginInfo.java 
b/solr/core/src/java/org/apache/solr/core/PluginInfo.java
index 5c24ee9a8f4..b55907f1e2f 100644
--- a/solr/core/src/java/org/apache/solr/core/PluginInfo.java
+++ b/solr/core/src/java/org/apache/solr/core/PluginInfo.java
@@ -118,7 +118,7 @@ public class PluginInfo implements MapSerializable {
     className = cName.className;
     pkgName = cName.pkg;
     initArgs = DOMUtil.childNodesToNamedList(node);
-    attributes = node.attributes().asMap();
+    attributes = node.attributes();
     children = loadSubPlugins(node);
     isFromSolrConfig = true;
   }
diff --git a/solr/core/src/java/org/apache/solr/core/SolrXmlConfig.java 
b/solr/core/src/java/org/apache/solr/core/SolrXmlConfig.java
index cb326e734ea..270ae18d32a 100644
--- a/solr/core/src/java/org/apache/solr/core/SolrXmlConfig.java
+++ b/solr/core/src/java/org/apache/solr/core/SolrXmlConfig.java
@@ -31,6 +31,7 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import java.util.Properties;
 import java.util.Set;
 import java.util.function.Consumer;
@@ -141,10 +142,10 @@ public class SolrXmlConfig {
     // since it is arranged as a separate section it is placed here
     Map<String, String> coreAdminHandlerActions =
         readNodeListAsNamedList(root.get("coreAdminHandlerActions"), 
"<coreAdminHandlerActions>")
-            .asMap()
+            .asShallowMap()
             .entrySet()
             .stream()
-            .collect(Collectors.toMap(item -> item.getKey(), item -> 
item.getValue().toString()));
+            .collect(Collectors.toMap(Entry::getKey, item -> 
item.getValue().toString()));
 
     UpdateShardHandlerConfig updateConfig;
     if (deprecatedUpdateConfig == null) {
@@ -752,7 +753,7 @@ public class SolrXmlConfig {
     ConfigNode caching = metrics.get("solr/metrics/caching");
     if (caching != null) {
       Object threadsCachingIntervalSeconds =
-          DOMUtil.childNodesToNamedList(caching).get("threadsIntervalSeconds", 
null);
+          DOMUtil.childNodesToNamedList(caching).get("threadsIntervalSeconds");
       builder.setCacheConfig(
           new MetricsConfig.CacheConfig(
               threadsCachingIntervalSeconds == null
diff --git a/solr/core/src/java/org/apache/solr/schema/IndexSchema.java 
b/solr/core/src/java/org/apache/solr/schema/IndexSchema.java
index 06dad3175dc..b3f59eab4e7 100644
--- a/solr/core/src/java/org/apache/solr/schema/IndexSchema.java
+++ b/solr/core/src/java/org/apache/solr/schema/IndexSchema.java
@@ -526,7 +526,7 @@ public class IndexSchema {
         log.info("{}", sb);
       }
 
-      version = Float.parseFloat(rootNode.attributes().get("version", "1.0f"));
+      version = Float.parseFloat(rootNode.attributes().getOrDefault("version", 
"1.0f"));
 
       // load the Field Types
       final FieldTypePluginLoader typeLoader =
diff --git a/solr/core/src/java/org/apache/solr/search/CacheConfig.java 
b/solr/core/src/java/org/apache/solr/search/CacheConfig.java
index 83ce72af836..da05152a86d 100644
--- a/solr/core/src/java/org/apache/solr/search/CacheConfig.java
+++ b/solr/core/src/java/org/apache/solr/search/CacheConfig.java
@@ -87,7 +87,7 @@ public class CacheConfig implements MapSerializable {
     for (ConfigNode node : nodes) {
       if (node.boolAttr("enabled", true)) {
         CacheConfig config =
-            getConfig(loader, solrConfig, node.name(), 
node.attributes().asMap(), configPath);
+            getConfig(loader, solrConfig, node.name(), node.attributes(), 
configPath);
         result.put(config.args.get(NAME), config);
       }
     }
@@ -98,7 +98,7 @@ public class CacheConfig implements MapSerializable {
     if (!node.boolAttr("enabled", true) || !node.exists()) {
       return null;
     }
-    return getConfig(solrConfig, node.name(), node.attributes().asMap(), 
xpath);
+    return getConfig(solrConfig, node.name(), node.attributes(), xpath);
   }
 
   public static CacheConfig getConfig(
diff --git a/solr/core/src/java/org/apache/solr/update/UpdateLog.java 
b/solr/core/src/java/org/apache/solr/update/UpdateLog.java
index d1c430bceee..4d148ed0af4 100644
--- a/solr/core/src/java/org/apache/solr/update/UpdateLog.java
+++ b/solr/core/src/java/org/apache/solr/update/UpdateLog.java
@@ -391,7 +391,8 @@ public class UpdateLog implements PluginInfoInitialized, 
SolrMetricProducer {
     }
     int timeoutMs =
         objToInt(
-            info.initArgs.get("docLockTimeoutMs", 
info.initArgs.get("versionBucketLockTimeoutMs")),
+            info.initArgs.getOrDefault(
+                "docLockTimeoutMs", 
info.initArgs.get("versionBucketLockTimeoutMs")),
             EnvUtils.getPropertyAsLong("solr.update.docLockTimeoutMs", 
0L).intValue());
     updateLocks = new UpdateLocks(timeoutMs);
 
diff --git a/solr/core/src/java/org/apache/solr/util/DOMConfigNode.java 
b/solr/core/src/java/org/apache/solr/util/DOMConfigNode.java
index f7a47b5cc93..d35cd4bccc5 100644
--- a/solr/core/src/java/org/apache/solr/util/DOMConfigNode.java
+++ b/solr/core/src/java/org/apache/solr/util/DOMConfigNode.java
@@ -18,14 +18,11 @@
 package org.apache.solr.util;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Function;
-import org.apache.solr.cluster.api.SimpleMap;
 import org.apache.solr.common.ConfigNode;
 import org.apache.solr.common.util.DOMUtil;
-import org.apache.solr.common.util.WrappedSimpleMap;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 
@@ -33,7 +30,7 @@ import org.w3c.dom.NodeList;
 public class DOMConfigNode implements ConfigNode {
 
   private final Node node;
-  SimpleMap<String> attrs;
+  Map<String, String> attrs;
 
   @Override
   public String name() {
@@ -50,10 +47,10 @@ public class DOMConfigNode implements ConfigNode {
   }
 
   @Override
-  public SimpleMap<String> attributes() {
+  public Map<String, String> attributes() {
     if (attrs != null) return attrs;
     Map<String, String> attrs = DOMUtil.toMap(node.getAttributes());
-    return this.attrs = attrs.size() == 0 ? EMPTY : new 
WrappedSimpleMap<>(attrs);
+    return this.attrs = attrs.isEmpty() ? Map.of() : attrs;
   }
 
   @Override
@@ -85,6 +82,4 @@ public class DOMConfigNode implements ConfigNode {
       if (Boolean.FALSE.equals(toContinue)) break;
     }
   }
-
-  private static final SimpleMap<String> EMPTY = new 
WrappedSimpleMap<>(Collections.emptyMap());
 }
diff --git a/solr/core/src/java/org/apache/solr/util/DataConfigNode.java 
b/solr/core/src/java/org/apache/solr/util/DataConfigNode.java
index e8a00075031..4711e644cb4 100644
--- a/solr/core/src/java/org/apache/solr/util/DataConfigNode.java
+++ b/solr/core/src/java/org/apache/solr/util/DataConfigNode.java
@@ -17,8 +17,10 @@
 
 package org.apache.solr.util;
 
+import java.util.AbstractMap;
+import java.util.AbstractSet;
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -26,22 +28,20 @@ import java.util.Set;
 import java.util.function.BiConsumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
-import org.apache.solr.cluster.api.SimpleMap;
 import org.apache.solr.common.ConfigNode;
 import org.apache.solr.common.util.PropertiesUtil;
-import org.apache.solr.common.util.WrappedSimpleMap;
 
 /** ConfigNode impl that copies and maintains data internally from DOM */
 public class DataConfigNode implements ConfigNode {
   public final String name;
-  public final SimpleMap<String> attributes;
-  public final SimpleMap<List<ConfigNode>> kids;
+  public final Map<String, String> attributes;
+  public final Map<String, List<ConfigNode>> kids;
   public final String textData;
 
   public DataConfigNode(ConfigNode root) {
     Map<String, List<ConfigNode>> kids = new LinkedHashMap<>();
     name = root.name();
-    attributes = wrap(root.attributes());
+    attributes = wrapSubstituting(root.attributes());
     textData = root.txt();
     root.forEachChild(
         it -> {
@@ -54,31 +54,17 @@ public class DataConfigNode implements ConfigNode {
         e.setValue(List.copyOf(e.getValue()));
       }
     }
-    this.kids = kids.isEmpty() ? EMPTY : new 
WrappedSimpleMap<>(Map.copyOf(kids));
+    this.kids = Map.copyOf(kids);
   }
 
-  public String subtituteVal(String s) {
+  private static String substituteVal(String s) {
     return PropertiesUtil.substitute(s, SUBSTITUTES.get());
   }
 
-  private SimpleMap<String> wrap(SimpleMap<String> delegate) {
+  /** provides a substitute view, and read-only */
+  private static Map<String, String> wrapSubstituting(Map<String, String> 
delegate) {
     if (delegate.size() == 0) return delegate; // avoid unnecessary object 
creation
-    return new SimpleMap<>() {
-      @Override
-      public String get(String key) {
-        return subtituteVal(delegate.get(key));
-      }
-
-      @Override
-      public void forEachEntry(BiConsumer<String, ? super String> fun) {
-        delegate.forEachEntry((k, v) -> fun.accept(k, subtituteVal(v)));
-      }
-
-      @Override
-      public int size() {
-        return delegate.size();
-      }
-    };
+    return new SubstitutingMap(delegate);
   }
 
   @Override
@@ -88,11 +74,11 @@ public class DataConfigNode implements ConfigNode {
 
   @Override
   public String txt() {
-    return subtituteVal(textData);
+    return substituteVal(textData);
   }
 
   @Override
-  public SimpleMap<String> attributes() {
+  public Map<String, String> attributes() {
     return attributes;
   }
 
@@ -104,7 +90,7 @@ public class DataConfigNode implements ConfigNode {
 
   @Override
   public List<ConfigNode> getAll(String name) {
-    return kids.get(name, Collections.emptyList());
+    return kids.getOrDefault(name, List.of());
   }
 
   @Override
@@ -126,7 +112,7 @@ public class DataConfigNode implements ConfigNode {
 
   @Override
   public void forEachChild(Function<ConfigNode, Boolean> fun) {
-    kids.forEachEntry(
+    kids.forEach(
         (s, configNodes) -> {
           if (configNodes != null) {
             configNodes.forEach(fun::apply);
@@ -134,6 +120,74 @@ public class DataConfigNode implements ConfigNode {
         });
   }
 
-  public static final SimpleMap<List<ConfigNode>> EMPTY =
-      new WrappedSimpleMap<>(Collections.emptyMap());
+  private static class SubstitutingMap extends AbstractMap<String, String> {
+
+    private final Map<String, String> delegate;
+
+    SubstitutingMap(Map<String, String> delegate) {
+      this.delegate = delegate;
+    }
+
+    @Override
+    public String get(Object key) {
+      return substituteVal(delegate.get(key));
+    }
+
+    @Override
+    public int size() {
+      return delegate.size();
+    }
+
+    @Override
+    public Set<String> keySet() {
+      return delegate.keySet();
+    }
+
+    @Override
+    public void forEach(BiConsumer<? super String, ? super String> action) {
+      delegate.forEach((k, v) -> action.accept(k, substituteVal(v)));
+    }
+
+    @Override
+    public Set<Entry<String, String>> entrySet() {
+      return new AbstractSet<>() {
+        @Override
+        public Iterator<Entry<String, String>> iterator() {
+          // using delegate, return an iterator using Streams
+          return delegate.entrySet().stream()
+              .map(entry -> (Entry<String, String>) new 
SubstitutingEntry(entry))
+              .iterator();
+        }
+
+        @Override
+        public int size() {
+          return delegate.size();
+        }
+      };
+    }
+
+    private static class SubstitutingEntry implements Entry<String, String> {
+
+      private final Entry<String, String> delegateEntry;
+
+      SubstitutingEntry(Entry<String, String> delegateEntry) {
+        this.delegateEntry = delegateEntry;
+      }
+
+      @Override
+      public String getKey() {
+        return delegateEntry.getKey();
+      }
+
+      @Override
+      public String getValue() {
+        return substituteVal(delegateEntry.getValue());
+      }
+
+      @Override
+      public String setValue(String value) {
+        throw new UnsupportedOperationException();
+      }
+    }
+  }
 }
diff --git a/solr/core/src/test/org/apache/solr/core/TestCodecSupport.java 
b/solr/core/src/test/org/apache/solr/core/TestCodecSupport.java
index 8fd60619122..54f7406635d 100644
--- a/solr/core/src/test/org/apache/solr/core/TestCodecSupport.java
+++ b/solr/core/src/test/org/apache/solr/core/TestCodecSupport.java
@@ -20,6 +20,7 @@ import static 
org.apache.lucene.codecs.lucene90.Lucene90StoredFieldsFormat.MODE_
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Set;
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.codecs.lucene99.Lucene99Codec.Mode;
 import org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat;
@@ -238,7 +239,7 @@ public class TestCodecSupport extends SolrTestCaseJ4 {
         config.get("codecFactory").attr("class"));
     assertTrue(
         "Unexpected configuration of codec factory for this test. Expecting 
empty element",
-        config.get("codecFactory").getAll(null, (String) null).isEmpty());
+        config.get("codecFactory").getAll(null, Set.of()).isEmpty());
     IndexSchema schema = 
IndexSchemaFactory.buildIndexSchema("schema_codec.xml", config);
 
     CoreContainer coreContainer = h.getCoreContainer();
diff --git 
a/solr/core/src/test/org/apache/solr/handler/RequestHandlerMetricsTest.java 
b/solr/core/src/test/org/apache/solr/handler/RequestHandlerMetricsTest.java
index e3eecfc8cb3..b5b73de2597 100644
--- a/solr/core/src/test/org/apache/solr/handler/RequestHandlerMetricsTest.java
+++ b/solr/core/src/test/org/apache/solr/handler/RequestHandlerMetricsTest.java
@@ -90,11 +90,10 @@ public class RequestHandlerMetricsTest extends 
SolrCloudTestCase {
     final double[] minUpdateTime = {Double.MAX_VALUE};
     final double[] maxUpdateTime = {-1.0};
     Set<NamedList<Object>> coreMetrics = new HashSet<>();
-    metrics.forEachKey(
-        (key) -> {
+    metrics.forEach(
+        (key, coreMetric) -> {
           if (key.startsWith("solr.core.testRequestHandlerMetrics")) {
-            NamedList<Object> coreMetric = (NamedList<Object>) 
metrics.get(key);
-            coreMetrics.add(coreMetric);
+            coreMetrics.add((NamedList<Object>) coreMetric);
           }
         });
     assertEquals(2, coreMetrics.size());
diff --git 
a/solr/core/src/test/org/apache/solr/handler/admin/CoreAdminHandlerActionTest.java
 
b/solr/core/src/test/org/apache/solr/handler/admin/CoreAdminHandlerActionTest.java
index 235db7af21e..6b5daa5642d 100644
--- 
a/solr/core/src/test/org/apache/solr/handler/admin/CoreAdminHandlerActionTest.java
+++ 
b/solr/core/src/test/org/apache/solr/handler/admin/CoreAdminHandlerActionTest.java
@@ -17,7 +17,6 @@
 package org.apache.solr.handler.admin;
 
 import java.util.Locale;
-import java.util.Map;
 import org.apache.solr.SolrTestCaseJ4;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.common.params.CoreAdminParams;
@@ -82,11 +81,11 @@ public class CoreAdminHandlerActionTest extends 
SolrTestCaseJ4 {
 
     admin.handleRequestBody(req(CoreAdminParams.ACTION, action), response);
 
-    Map<String, Object> actionResponse = ((NamedList<Object>) 
response.getResponse()).asMap();
+    var actionResponse = (NamedList<Object>) response.getResponse();
 
     assertTrue(
         String.format(Locale.ROOT, "Action response should contain %s 
property", propertyName),
-        actionResponse.containsKey(propertyName));
+        actionResponse.get(propertyName) != null);
     assertEquals(
         String.format(
             Locale.ROOT,
diff --git 
a/solr/core/src/test/org/apache/solr/search/facet/SpatialHeatmapFacetsTest.java 
b/solr/core/src/test/org/apache/solr/search/facet/SpatialHeatmapFacetsTest.java
index 185e9693860..a385eeeb498 100644
--- 
a/solr/core/src/test/org/apache/solr/search/facet/SpatialHeatmapFacetsTest.java
+++ 
b/solr/core/src/test/org/apache/solr/search/facet/SpatialHeatmapFacetsTest.java
@@ -155,9 +155,11 @@ public class SpatialHeatmapFacetsTest extends 
BaseDistributedSearchTestCase {
               .findRecursive("facet_counts", "facet_heatmaps", "course", 
"gridLevel"));
       assertTrue(
           ((NamedList<Object>)
-                  response.getResponse().findRecursive("facet_counts", 
"facet_heatmaps", "course"))
-              .asMap(0)
-              .containsKey("counts_" + courseFormat));
+                      response
+                          .getResponse()
+                          .findRecursive("facet_counts", "facet_heatmaps", 
"course"))
+                  .indexOf("counts_" + courseFormat, 0)
+              >= 0);
     }
 
     // ------ Index data
diff --git 
a/solr/solrj-zookeeper/src/java/org/apache/solr/common/LazySolrCluster.java 
b/solr/solrj-zookeeper/src/java/org/apache/solr/common/LazySolrCluster.java
index 9b09d063ab2..6dc597ad646 100644
--- a/solr/solrj-zookeeper/src/java/org/apache/solr/common/LazySolrCluster.java
+++ b/solr/solrj-zookeeper/src/java/org/apache/solr/common/LazySolrCluster.java
@@ -53,6 +53,7 @@ import org.apache.zookeeper.KeeperException;
  * the value of anything can change any moment Creating an instance is a low 
cost operation. It does
  * not result in a network call or large object creation
  */
+@Deprecated
 public class LazySolrCluster implements SolrCluster {
   final ZkStateReader zkStateReader;
 
diff --git 
a/solr/solrj-zookeeper/src/java/org/apache/solr/common/SimpleZkMap.java 
b/solr/solrj-zookeeper/src/java/org/apache/solr/common/SimpleZkMap.java
index 39051da857c..f72d487256d 100644
--- a/solr/solrj-zookeeper/src/java/org/apache/solr/common/SimpleZkMap.java
+++ b/solr/solrj-zookeeper/src/java/org/apache/solr/common/SimpleZkMap.java
@@ -35,6 +35,7 @@ import org.apache.zookeeper.KeeperException;
  * #abortableForEach(BiFunction)} to traverse DO not use the {@link #size()} 
method. It always
  * return 0 because it is very expensive to compute that
  */
+@Deprecated
 public class SimpleZkMap implements SimpleMap<Resource> {
   private final ZkStateReader zkStateReader;
   private final String basePath;
diff --git 
a/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/PerReplicaStatesOps.java
 
b/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/PerReplicaStatesOps.java
index dd0b14fd3e1..06903a65a0e 100644
--- 
a/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/PerReplicaStatesOps.java
+++ 
b/solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/PerReplicaStatesOps.java
@@ -214,7 +214,7 @@ public class PerReplicaStatesOps {
         new PerReplicaStatesOps(
             prs -> {
               List<PerReplicaStates.Operation> result = new ArrayList<>();
-              prs.states.forEachEntry(
+              prs.states.forEach(
                   (s, state) ->
                       result.add(
                           new PerReplicaStates.Operation(
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/ApiType.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/ApiType.java
index 1d4502cd3ce..1945a2039a1 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/ApiType.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/ApiType.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** Types of API calls */
+@Deprecated
 public enum ApiType {
   V1("solr"),
   V2("api");
diff --git 
a/solr/solrj/src/java/org/apache/solr/cluster/api/CollectionConfig.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/CollectionConfig.java
index 020c57fc055..c3043ab50dc 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/CollectionConfig.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/CollectionConfig.java
@@ -17,6 +17,7 @@
 
 package org.apache.solr.cluster.api;
 
+@Deprecated
 public interface CollectionConfig {
 
   String name();
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/HashRange.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/HashRange.java
index 23d8fab1325..3bfa66eaab6 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/HashRange.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/HashRange.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** A range of hash that is stored in a shard */
+@Deprecated
 public interface HashRange {
 
   /** minimum value (inclusive) */
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/Resource.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/Resource.java
index 13548f6a822..faa5207838b 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/Resource.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/Resource.java
@@ -22,6 +22,7 @@ import java.io.InputStream;
 import org.apache.solr.common.SolrException;
 
 /** A binary resource. The impl is agnostic of the content type */
+@Deprecated
 public interface Resource {
   /** This is a full path. e.g schema.xml, solrconfig.xml, lang/stopwords.txt 
etc */
   String name();
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/Router.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/Router.java
index ae6f6336ba4..ecea98572f2 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/Router.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/Router.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** identify shards for a given routing key or document id */
+@Deprecated
 public interface Router {
 
   /** shard name for a given routing key */
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/Shard.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/Shard.java
index 0b3cfc15abd..896cf8dd6b4 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/Shard.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/Shard.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** A shard of a collection */
+@Deprecated
 public interface Shard {
 
   /** name of the shard */
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/ShardReplica.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/ShardReplica.java
index 57b133a0ad6..0e85e51cea7 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/ShardReplica.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/ShardReplica.java
@@ -20,6 +20,7 @@ package org.apache.solr.cluster.api;
 import org.apache.solr.common.cloud.Replica;
 
 /** replica of a shard */
+@Deprecated
 public interface ShardReplica {
   /** Name of this replica */
   String name();
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/SimpleMap.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/SimpleMap.java
index 4398d12742f..3684a2862df 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/SimpleMap.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/SimpleMap.java
@@ -32,23 +32,27 @@ import org.apache.solr.common.MapWriter;
  * efficient to implement and consume. The keys are always {@link 
CharSequence} objects, The values
  * can be of any type
  */
+@Deprecated
 public interface SimpleMap<T> extends MapWriter {
 
   /** get a value by key. If not present , null is returned */
   T get(String key);
 
+  @Deprecated
   default T get(String key, T def) {
     T val = get(key);
     return val == null ? def : val;
   }
 
   /** Navigate through all keys and values */
+  @Deprecated
   void forEachEntry(BiConsumer<String, ? super T> fun);
 
   /**
    * iterate through all keys The default impl is suboptimal. Proper 
implementations must do it more
    * efficiently
    */
+  @Deprecated
   default void forEachKey(Consumer<String> fun) {
     forEachEntry((k, t) -> fun.accept(k));
   }
@@ -62,6 +66,7 @@ public interface SimpleMap<T> extends MapWriter {
    * @param fun Consume each key and return a boolean to signal whether to 
proceed or not. If true,
    *     continue. If false stop
    */
+  @Deprecated
   default void abortableForEachKey(Function<String, Boolean> fun) {
     abortableForEach((key, t) -> fun.apply(key));
   }
@@ -73,6 +78,7 @@ public interface SimpleMap<T> extends MapWriter {
    * @param fun Consume each entry and return a boolean to signal whether to 
proceed or not. If
    *     true, continue, if false stop
    */
+  @Deprecated
   default void abortableForEach(BiFunction<String, ? super T, Boolean> fun) {
     forEachEntry(
         new BiConsumer<>() {
@@ -91,11 +97,13 @@ public interface SimpleMap<T> extends MapWriter {
     forEachEntry(ew::putNoEx);
   }
 
+  @Deprecated
   default Map<String, T> asMap(Map<String, T> sink) {
     forEachEntry(sink::put);
     return sink;
   }
 
+  @Deprecated
   default Map<String, T> asMap() {
     return asMap(new LinkedHashMap<>());
   }
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCluster.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCluster.java
index 301cd57655b..1fa77d24c8d 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCluster.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCluster.java
@@ -20,6 +20,7 @@ package org.apache.solr.cluster.api;
 import org.apache.solr.common.SolrException;
 
 /** Represents a Solr cluster */
+@Deprecated
 public interface SolrCluster {
 
   /** collections in the cluster */
diff --git 
a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCollection.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCollection.java
index df9007e3b7f..c0dd86d047a 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCollection.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrCollection.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** Represents a collection in Solr */
+@Deprecated
 public interface SolrCollection {
 
   String name();
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrNode.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrNode.java
index 13115643c12..e6db68a1470 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/SolrNode.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/SolrNode.java
@@ -18,6 +18,7 @@
 package org.apache.solr.cluster.api;
 
 /** A read only view of a Solr node */
+@Deprecated
 public interface SolrNode {
 
   /** The node name */
diff --git a/solr/solrj/src/java/org/apache/solr/cluster/api/package-info.java 
b/solr/solrj/src/java/org/apache/solr/cluster/api/package-info.java
index 9c4183d49da..84e7f43b356 100644
--- a/solr/solrj/src/java/org/apache/solr/cluster/api/package-info.java
+++ b/solr/solrj/src/java/org/apache/solr/cluster/api/package-info.java
@@ -16,4 +16,5 @@
  */
 
 /** API interfaces for core SolrCloud classes */
+@Deprecated
 package org.apache.solr.cluster.api;
diff --git a/solr/solrj/src/java/org/apache/solr/common/ConfigNode.java 
b/solr/solrj/src/java/org/apache/solr/common/ConfigNode.java
index be86c1e5c7b..18022605f69 100644
--- a/solr/solrj/src/java/org/apache/solr/common/ConfigNode.java
+++ b/solr/solrj/src/java/org/apache/solr/common/ConfigNode.java
@@ -26,12 +26,11 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
-import org.apache.solr.cluster.api.SimpleMap;
-import org.apache.solr.common.util.WrappedSimpleMap;
 
 /**
  * A generic interface that represents a config file, mostly XML Please note 
that this is an
@@ -44,7 +43,7 @@ public interface ConfigNode {
   String name();
 
   /** Attributes */
-  SimpleMap<String> attributes();
+  Map<String, String> attributes();
 
   /** Child by name */
   default ConfigNode child(String name) {
@@ -195,8 +194,8 @@ public interface ConfigNode {
         }
 
         @Override
-        public SimpleMap<String> attributes() {
-          return empty_attrs;
+        public Map<String, String> attributes() {
+          return Map.of();
         }
 
         @Override
@@ -233,8 +232,6 @@ public interface ConfigNode {
         public void forEachChild(Function<ConfigNode, Boolean> fun) {}
       };
 
-  SimpleMap<String> empty_attrs = new 
WrappedSimpleMap<>(Collections.emptyMap());
-
   class Helpers {
     static boolean _bool(Object v, boolean def) {
       return v == null ? def : Boolean.parseBoolean(v.toString());
diff --git a/solr/solrj/src/java/org/apache/solr/common/cloud/DocRouter.java 
b/solr/solrj/src/java/org/apache/solr/common/cloud/DocRouter.java
index 3c8ff93b816..82265675224 100644
--- a/solr/solrj/src/java/org/apache/solr/common/cloud/DocRouter.java
+++ b/solr/solrj/src/java/org/apache/solr/common/cloud/DocRouter.java
@@ -24,7 +24,6 @@ import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import org.apache.solr.cluster.api.HashRange;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.common.SolrInputDocument;
 import org.apache.solr.common.cloud.DocCollection.CollectionStateProps;
@@ -89,7 +88,7 @@ public abstract class DocRouter {
   // Hash ranges can't currently "wrap" - i.e. max must be greater or equal to 
min.
   // TODO: ranges may not be all contiguous in the future (either that or we 
will
   // need an extra class to model a collection of ranges)
-  public static class Range implements JSONWriter.Writable, Comparable<Range>, 
HashRange {
+  public static class Range implements JSONWriter.Writable, Comparable<Range> {
     public int min; // inclusive
     public int max; // inclusive
 
@@ -99,17 +98,14 @@ public abstract class DocRouter {
       this.max = max;
     }
 
-    @Override
     public int min() {
       return min;
     }
 
-    @Override
     public int max() {
       return max;
     }
 
-    @Override
     public boolean includes(int hash) {
       return hash >= min && hash <= max;
     }
diff --git 
a/solr/solrj/src/java/org/apache/solr/common/cloud/PerReplicaStates.java 
b/solr/solrj/src/java/org/apache/solr/common/cloud/PerReplicaStates.java
index 60616d8fd70..961f3efc50d 100644
--- a/solr/solrj/src/java/org/apache/solr/common/cloud/PerReplicaStates.java
+++ b/solr/solrj/src/java/org/apache/solr/common/cloud/PerReplicaStates.java
@@ -31,14 +31,12 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 import java.util.function.BiConsumer;
-import org.apache.solr.cluster.api.SimpleMap;
 import org.apache.solr.common.IteratorWriter;
 import org.apache.solr.common.MapWriter;
 import org.apache.solr.common.annotation.JsonProperty;
 import org.apache.solr.common.cloud.Replica.ReplicaStateProps;
 import org.apache.solr.common.util.ReflectMapWriter;
 import org.apache.solr.common.util.StrUtils;
-import org.apache.solr.common.util.WrappedSimpleMap;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -59,7 +57,7 @@ public class PerReplicaStates implements ReflectMapWriter {
   @JsonProperty public final int cversion;
 
   // states of individual replicas
-  @JsonProperty public final SimpleMap<State> states;
+  @JsonProperty public final Map<String, State> states;
 
   private volatile Boolean allActive;
 
@@ -85,7 +83,7 @@ public class PerReplicaStates implements ReflectMapWriter {
         tmp.put(rs.replica, rs.insert(existing));
       }
     }
-    this.states = new WrappedSimpleMap<>(tmp);
+    this.states = tmp;
   }
 
   public static PerReplicaStates empty(String collectionName) {
@@ -95,27 +93,23 @@ public class PerReplicaStates implements ReflectMapWriter {
   /** Check and return if all replicas are ACTIVE */
   public boolean allActive() {
     if (this.allActive != null) return allActive;
-    boolean[] result = new boolean[] {true};
-    states.forEachEntry(
-        (r, s) -> {
-          if (s.state != Replica.State.ACTIVE) result[0] = false;
-        });
-    return this.allActive = result[0];
+    this.allActive = states.values().stream().allMatch(s -> s.state == 
Replica.State.ACTIVE);
+    return allActive;
   }
 
   /** Get the changed replicas */
   public static Set<String> findModifiedReplicas(PerReplicaStates old, 
PerReplicaStates fresh) {
     Set<String> result = new HashSet<>();
     if (fresh == null) {
-      old.states.forEachKey(result::add);
+      result.addAll(old.states.keySet());
       return result;
     }
-    old.states.forEachEntry(
+    old.states.forEach(
         (s, state) -> {
           // the state is modified or missing
           if (!Objects.equals(fresh.get(s), state)) result.add(s);
         });
-    fresh.states.forEachEntry(
+    fresh.states.forEach(
         (s, state) -> {
           if (old.get(s) == null) result.add(s);
         });
@@ -165,8 +159,8 @@ public class PerReplicaStates implements ReflectMapWriter {
   }
 
   private StringBuilder appendStates(StringBuilder sb) {
-    states.forEachEntry(
-        new BiConsumer<String, State>() {
+    states.forEach(
+        new BiConsumer<>() {
           int count = 0;
 
           @Override
@@ -318,7 +312,7 @@ public class PerReplicaStates implements ReflectMapWriter {
               ew.put(
                   "states",
                   (IteratorWriter)
-                      iw -> states.forEachEntry((s, state) -> 
iw.addNoEx(state.toString())));
+                      iw -> states.forEach((s, state) -> 
iw.addNoEx(state.toString())));
             } else {
               ew.put(k, v);
             }
diff --git a/solr/solrj/src/java/org/apache/solr/common/util/DOMUtil.java 
b/solr/solrj/src/java/org/apache/solr/common/util/DOMUtil.java
index 840c64b5d87..0ef6bfbe538 100644
--- a/solr/solrj/src/java/org/apache/solr/common/util/DOMUtil.java
+++ b/solr/solrj/src/java/org/apache/solr/common/util/DOMUtil.java
@@ -50,7 +50,7 @@ public class DOMUtil {
   public static Map<String, String> toMapExcept(ConfigNode node, String... 
exclusions) {
     Map<String, String> args = new HashMap<>();
     node.attributes()
-        .forEachEntry(
+        .forEach(
             (k, v) -> {
               for (String ex : exclusions) if (ex.equals(k)) return;
               args.put(k, v);
diff --git a/solr/solrj/src/java/org/apache/solr/common/util/NamedList.java 
b/solr/solrj/src/java/org/apache/solr/common/util/NamedList.java
index aef0edaa4cf..6a34479fe16 100644
--- a/solr/solrj/src/java/org/apache/solr/common/util/NamedList.java
+++ b/solr/solrj/src/java/org/apache/solr/common/util/NamedList.java
@@ -253,6 +253,12 @@ public class NamedList<T>
     return get(name, 0);
   }
 
+  /** Like {@link #get(String)} but returns a default value if it would be 
null. */
+  public T getOrDefault(String name, T def) {
+    T val = get(name);
+    return val == null ? def : val;
+  }
+
   /**
    * Gets the value for the first instance of the specified name found 
starting at the specified
    * index.
@@ -486,7 +492,7 @@ public class NamedList<T>
 
       @Override
       public void forEach(BiConsumer action) {
-        NamedList.this.forEachEntry(action);
+        NamedList.this.forEach(action);
       }
     };
   }
diff --git 
a/solr/solrj/src/java/org/apache/solr/common/util/WrappedSimpleMap.java 
b/solr/solrj/src/java/org/apache/solr/common/util/WrappedSimpleMap.java
index 417e8d3c968..768fef788b9 100644
--- a/solr/solrj/src/java/org/apache/solr/common/util/WrappedSimpleMap.java
+++ b/solr/solrj/src/java/org/apache/solr/common/util/WrappedSimpleMap.java
@@ -22,6 +22,7 @@ import java.util.Map;
 import java.util.function.BiConsumer;
 import org.apache.solr.cluster.api.SimpleMap;
 
+@Deprecated
 public class WrappedSimpleMap<T> implements SimpleMap<T> {
   private final Map<String, T> delegate;
 
diff --git 
a/solr/solrj/src/test/org/apache/solr/common/cloud/PerReplicaStatesIntegrationTest.java
 
b/solr/solrj/src/test/org/apache/solr/common/cloud/PerReplicaStatesIntegrationTest.java
index 3512e74c6f3..feeab8ab198 100644
--- 
a/solr/solrj/src/test/org/apache/solr/common/cloud/PerReplicaStatesIntegrationTest.java
+++ 
b/solr/solrj/src/test/org/apache/solr/common/cloud/PerReplicaStatesIntegrationTest.java
@@ -159,7 +159,7 @@ public class PerReplicaStatesIntegrationTest extends 
SolrCloudTestCase {
           PerReplicaStatesOps.fetch(collectionPath, 
SolrCloudTestCase.cluster.getZkClient(), null);
       assertEquals(2, prs.states.size());
       c = cluster.getZkStateReader().getCollection(testCollection);
-      prs.states.forEachEntry((s, state) -> assertEquals(Replica.State.ACTIVE, 
state.state));
+      prs.states.forEach((s, state) -> assertEquals(Replica.State.ACTIVE, 
state.state));
 
       String replicaName = null;
       for (Replica r : c.getSlice("shard1").getReplicas()) {
@@ -215,7 +215,7 @@ public class PerReplicaStatesIntegrationTest extends 
SolrCloudTestCase {
         prs =
             PerReplicaStatesOps.fetch(
                 collectionPath, SolrCloudTestCase.cluster.getZkClient(), null);
-        prs.states.forEachEntry((s, state) -> 
assertEquals(Replica.State.ACTIVE, state.state));
+        prs.states.forEach((s, state) -> assertEquals(Replica.State.ACTIVE, 
state.state));
       }
 
     } finally {
@@ -275,7 +275,7 @@ public class PerReplicaStatesIntegrationTest extends 
SolrCloudTestCase {
                 PerReplicaStates prs2 =
                     PerReplicaStatesOps.fetch(
                         DocCollection.getCollectionPath(COLL), 
cluster.getZkClient(), null);
-                prs2.states.forEachEntry(
+                prs2.states.forEach(
                     (r, newState) -> {
                       if (newState.getDuplicate() != null) anyFail.set(true);
                     });


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