Create separate transport action for render search template action

CHANGELOG.md

@@ -120,6 +120,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Allow changing number of replicas of searchable snapshot index ([#11317](https://github.com/opensearch-project/OpenSearch/pull/11317))
 - Adding slf4j license header to LoggerMessageFormat.java ([#11069](https://github.com/opensearch-project/OpenSearch/pull/11069))
 - [BWC and API enforcement] Introduce checks for enforcing the API restrictions ([#11175](https://github.com/opensearch-project/OpenSearch/pull/11175))
+- Create separate transport action for render search template action ([#11170](https://github.com/opensearch-project/OpenSearch/pull/11170))
 
 ### Dependencies
 - Bump Lucene from 9.7.0 to 9.8.0 ([10276](https://github.com/opensearch-project/OpenSearch/pull/10276))

modules/lang-mustache/src/main/java/org/opensearch/script/mustache/MustacheModulePlugin.java

@@ -65,6 +65,7 @@ public ScriptEngine getScriptEngine(Settings settings, Collection<ScriptContext<
     public List<ActionHandler<? extends ActionRequest, ? extends ActionResponse>> getActions() {
         return Arrays.asList(
             new ActionHandler<>(SearchTemplateAction.INSTANCE, TransportSearchTemplateAction.class),
+            new ActionHandler<>(RenderSearchTemplateAction.INSTANCE, TransportRenderSearchTemplateAction.class),
             new ActionHandler<>(MultiSearchTemplateAction.INSTANCE, TransportMultiSearchTemplateAction.class)
         );
     }

modules/lang-mustache/src/main/java/org/opensearch/script/mustache/RenderSearchTemplateAction.java

@@ -0,0 +1,21 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.script.mustache;
+
+import org.opensearch.action.ActionType;
+
+public class RenderSearchTemplateAction extends ActionType<SearchTemplateResponse> {
+
+    public static final RenderSearchTemplateAction INSTANCE = new RenderSearchTemplateAction();
+    public static final String NAME = "indices:data/read/search/template/render";
+
+    private RenderSearchTemplateAction() {
+        super(NAME, SearchTemplateResponse::new);
+    }
+}

modules/lang-mustache/src/main/java/org/opensearch/script/mustache/RestRenderSearchTemplateAction.java

@@ -81,6 +81,6 @@
             renderRequest.setScript(id);
         }
 
-        return channel -> client.execute(SearchTemplateAction.INSTANCE, renderRequest, new RestToXContentListener<>(channel));
+        return channel -> client.execute(RenderSearchTemplateAction.INSTANCE, renderRequest, new RestToXContentListener<>(channel));
     }
 }

modules/lang-mustache/src/main/java/org/opensearch/script/mustache/TransportRenderSearchTemplateAction.java

@@ -0,0 +1,30 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.script.mustache;
+
+import org.opensearch.action.support.ActionFilters;
+import org.opensearch.client.node.NodeClient;
+import org.opensearch.common.inject.Inject;
+import org.opensearch.core.xcontent.NamedXContentRegistry;
+import org.opensearch.script.ScriptService;
+import org.opensearch.transport.TransportService;
+
+public class TransportRenderSearchTemplateAction extends TransportSearchTemplateAction {
+
+    @Inject
+    public TransportRenderSearchTemplateAction(
+        TransportService transportService,
+        ActionFilters actionFilters,
+        ScriptService scriptService,
+        NamedXContentRegistry xContentRegistry,
+        NodeClient client
+    ) {
+        super(RenderSearchTemplateAction.NAME, transportService, actionFilters, scriptService, xContentRegistry, client);
+    }
+}

modules/lang-mustache/src/main/java/org/opensearch/script/mustache/TransportSearchTemplateAction.java

@@ -61,9 +61,9 @@
 
     private static final String TEMPLATE_LANG = MustacheScriptEngine.NAME;
 
-    private final ScriptService scriptService;
-    private final NamedXContentRegistry xContentRegistry;
-    private final NodeClient client;
+    protected final ScriptService scriptService;
+    protected final NamedXContentRegistry xContentRegistry;
+    protected final NodeClient client;
 
     @Inject
     public TransportSearchTemplateAction(
@@ -79,6 +79,20 @@
         this.client = client;
     }
 
+    public TransportSearchTemplateAction(
+        String actionName,
+        TransportService transportService,
+        ActionFilters actionFilters,
+        ScriptService scriptService,
+        NamedXContentRegistry xContentRegistry,
+        NodeClient client
+    ) {
+        super(actionName, transportService, actionFilters, SearchTemplateRequest::new);
+        this.scriptService = scriptService;
+        this.xContentRegistry = xContentRegistry;
+        this.client = client;
+    }
+
     @Override
     protected void doExecute(Task task, SearchTemplateRequest request, ActionListener<SearchTemplateResponse> listener) {
         final SearchTemplateResponse response = new SearchTemplateResponse();