Explicit index resolution API

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add pluggable gRPC interceptors with explicit ordering([#19005](https://github.com/opensearch-project/OpenSearch/pull/19005))
 - Add metrics for the merged segment warmer feature ([#18929](https://github.com/opensearch-project/OpenSearch/pull/18929))
 - Add pointer based lag metric in pull-based ingestion ([#19635](https://github.com/opensearch-project/OpenSearch/pull/19635))
+- Introduced internal API for retrieving metadata about requested indices from transport actions  ([#18523](https://github.com/opensearch-project/OpenSearch/pull/18523))
 
 ### Changed
 - Faster `terms` query creation for `keyword` field with index and docValues enabled ([#19350](https://github.com/opensearch-project/OpenSearch/pull/19350))

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

@@ -8,6 +8,7 @@
 
 package org.opensearch.script.mustache;
 
+import org.opensearch.action.search.TransportSearchAction;
 import org.opensearch.action.support.ActionFilters;
 import org.opensearch.common.inject.Inject;
 import org.opensearch.core.xcontent.NamedXContentRegistry;
@@ -23,8 +24,17 @@ public TransportRenderSearchTemplateAction(
         ActionFilters actionFilters,
         ScriptService scriptService,
         NamedXContentRegistry xContentRegistry,
-        NodeClient client
+        NodeClient client,
+        TransportSearchAction transportSearchAction
     ) {
-        super(RenderSearchTemplateAction.NAME, transportService, actionFilters, scriptService, xContentRegistry, client);
+        super(
+            RenderSearchTemplateAction.NAME,
+            transportService,
+            actionFilters,
+            scriptService,
+            xContentRegistry,
+            client,
+            transportSearchAction
+        );
     }
 }

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

@@ -34,8 +34,12 @@
 
 import org.opensearch.action.search.SearchRequest;
 import org.opensearch.action.search.SearchResponse;
+import org.opensearch.action.search.TransportSearchAction;
 import org.opensearch.action.support.ActionFilters;
 import org.opensearch.action.support.HandledTransportAction;
+import org.opensearch.action.support.TransportIndicesResolvingAction;
+import org.opensearch.cluster.metadata.OptionallyResolvedIndices;
+import org.opensearch.cluster.metadata.ResolvedIndices;
 import org.opensearch.common.inject.Inject;
 import org.opensearch.common.xcontent.LoggingDeprecationHandler;
 import org.opensearch.core.action.ActionListener;
@@ -57,26 +61,30 @@
 import java.io.IOException;
 import java.util.Collections;
 
-public class TransportSearchTemplateAction extends HandledTransportAction<SearchTemplateRequest, SearchTemplateResponse> {
-
+public class TransportSearchTemplateAction extends HandledTransportAction<SearchTemplateRequest, SearchTemplateResponse>
+    implements
+        TransportIndicesResolvingAction<SearchTemplateRequest> {
     private static final String TEMPLATE_LANG = MustacheScriptEngine.NAME;
 
     protected final ScriptService scriptService;
     protected final NamedXContentRegistry xContentRegistry;
     protected final NodeClient client;
+    private final TransportSearchAction transportSearchAction;
 
     @Inject
     public TransportSearchTemplateAction(
         TransportService transportService,
         ActionFilters actionFilters,
         ScriptService scriptService,
         NamedXContentRegistry xContentRegistry,
-        NodeClient client
+        NodeClient client,
+        TransportSearchAction transportSearchAction
     ) {
         super(SearchTemplateAction.NAME, transportService, actionFilters, SearchTemplateRequest::new);
         this.scriptService = scriptService;
         this.xContentRegistry = xContentRegistry;
         this.client = client;
+        this.transportSearchAction = transportSearchAction;
     }
 
     public TransportSearchTemplateAction(
@@ -85,12 +93,14 @@ public TransportSearchTemplateAction(
         ActionFilters actionFilters,
         ScriptService scriptService,
         NamedXContentRegistry xContentRegistry,
-        NodeClient client
+        NodeClient client,
+        TransportSearchAction transportSearchAction
     ) {
         super(actionName, transportService, actionFilters, SearchTemplateRequest::new);
         this.scriptService = scriptService;
         this.xContentRegistry = xContentRegistry;
         this.client = client;
+        this.transportSearchAction = transportSearchAction;
     }
 
     @Override
@@ -180,4 +190,14 @@ private static void checkRestTotalHitsAsInt(SearchRequest searchRequest, SearchS
                 }
         }
     }
+
+    @Override
+    public OptionallyResolvedIndices resolveIndices(SearchTemplateRequest request) {
+        if (request.getRequest() != null) {
+            return transportSearchAction.resolveIndices(request.getRequest());
+        } else {
+            // For the RenderSearchTemplateAction, request.getRequest() will be null.
+            return ResolvedIndices.unknown();
+        }
+    }
 }

modules/reindex/src/main/java/org/opensearch/index/reindex/TransportDeleteByQueryAction.java

@@ -32,8 +32,11 @@
 
 package org.opensearch.index.reindex;
 
+import org.opensearch.action.search.TransportSearchAction;
 import org.opensearch.action.support.ActionFilters;
 import org.opensearch.action.support.HandledTransportAction;
+import org.opensearch.action.support.TransportIndicesResolvingAction;
+import org.opensearch.cluster.metadata.ResolvedIndices;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.inject.Inject;
 import org.opensearch.core.action.ActionListener;
@@ -45,12 +48,15 @@
 import org.opensearch.transport.client.Client;
 import org.opensearch.transport.client.ParentTaskAssigningClient;
 
-public class TransportDeleteByQueryAction extends HandledTransportAction<DeleteByQueryRequest, BulkByScrollResponse> {
+public class TransportDeleteByQueryAction extends HandledTransportAction<DeleteByQueryRequest, BulkByScrollResponse>
+    implements
+        TransportIndicesResolvingAction<DeleteByQueryRequest> {
 
     private final ThreadPool threadPool;
     private final Client client;
     private final ScriptService scriptService;
     private final ClusterService clusterService;
+    private final TransportSearchAction transportSearchAction;
 
     @Inject
     public TransportDeleteByQueryAction(
@@ -59,7 +65,8 @@ public TransportDeleteByQueryAction(
         Client client,
         TransportService transportService,
         ScriptService scriptService,
-        ClusterService clusterService
+        ClusterService clusterService,
+        TransportSearchAction transportSearchAction
     ) {
         super(
             DeleteByQueryAction.NAME,
@@ -71,6 +78,7 @@ public TransportDeleteByQueryAction(
         this.client = client;
         this.scriptService = scriptService;
         this.clusterService = clusterService;
+        this.transportSearchAction = transportSearchAction;
     }
 
     @Override
@@ -95,4 +103,9 @@ public void doExecute(Task task, DeleteByQueryRequest request, ActionListener<Bu
             }
         );
     }
+
+    @Override
+    public ResolvedIndices resolveIndices(DeleteByQueryRequest request) {
+        return transportSearchAction.resolveIndices(request.getSearchRequest());
+    }
 }

modules/reindex/src/main/java/org/opensearch/index/reindex/TransportReindexAction.java

@@ -32,10 +32,14 @@
 
 package org.opensearch.index.reindex;
 
+import org.opensearch.action.index.IndexAction;
+import org.opensearch.action.search.TransportSearchAction;
 import org.opensearch.action.support.ActionFilters;
 import org.opensearch.action.support.AutoCreateIndex;
 import org.opensearch.action.support.HandledTransportAction;
+import org.opensearch.action.support.TransportIndicesResolvingAction;
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
+import org.opensearch.cluster.metadata.ResolvedIndices;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.inject.Inject;
 import org.opensearch.common.settings.Setting;
@@ -56,7 +60,9 @@
 
 import static java.util.Collections.emptyList;
 
-public class TransportReindexAction extends HandledTransportAction<ReindexRequest, BulkByScrollResponse> {
+public class TransportReindexAction extends HandledTransportAction<ReindexRequest, BulkByScrollResponse>
+    implements
+        TransportIndicesResolvingAction<ReindexRequest> {
     public static final Setting<List<String>> REMOTE_CLUSTER_ALLOWLIST = Setting.listSetting(
         "reindex.remote.allowlist",
         emptyList(),
@@ -88,6 +94,8 @@ public class TransportReindexAction extends HandledTransportAction<ReindexReques
     private final Reindexer reindexer;
 
     private final ClusterService clusterService;
+    private final TransportSearchAction transportSearchAction;
+    private final IndexNameExpressionResolver indexNameExpressionResolver;
 
     @Inject
     public TransportReindexAction(
@@ -100,12 +108,15 @@ public TransportReindexAction(
         AutoCreateIndex autoCreateIndex,
         Client client,
         TransportService transportService,
-        ReindexSslConfig sslConfig
+        ReindexSslConfig sslConfig,
+        TransportSearchAction transportSearchAction
     ) {
         super(ReindexAction.NAME, transportService, actionFilters, ReindexRequest::new);
         this.reindexValidator = new ReindexValidator(settings, clusterService, indexNameExpressionResolver, autoCreateIndex);
         this.reindexer = new Reindexer(clusterService, client, threadPool, scriptService, sslConfig, remoteExtension);
         this.clusterService = clusterService;
+        this.transportSearchAction = transportSearchAction;
+        this.indexNameExpressionResolver = indexNameExpressionResolver;
     }
 
     @Override
@@ -129,4 +140,13 @@ public void onFailure(Exception e) {
             }
         });
     }
+
+    @Override
+    public ResolvedIndices resolveIndices(ReindexRequest request) {
+        return transportSearchAction.resolveIndices(request.getSearchRequest())
+            .withLocalSubActions(
+                IndexAction.INSTANCE,
+                ResolvedIndices.Local.of(indexNameExpressionResolver.resolveDateMathExpression(request.getDestination().index()))
+            );
+    }
 }

modules/reindex/src/main/java/org/opensearch/index/reindex/TransportUpdateByQueryAction.java

@@ -34,9 +34,12 @@
 
 import org.apache.logging.log4j.Logger;
 import org.opensearch.action.index.IndexRequest;
+import org.opensearch.action.search.TransportSearchAction;
 import org.opensearch.action.support.ActionFilters;
 import org.opensearch.action.support.HandledTransportAction;
+import org.opensearch.action.support.TransportIndicesResolvingAction;
 import org.opensearch.cluster.ClusterState;
+import org.opensearch.cluster.metadata.ResolvedIndices;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.inject.Inject;
 import org.opensearch.core.action.ActionListener;
@@ -55,12 +58,15 @@
 import java.util.Map;
 import java.util.function.BiFunction;
 
-public class TransportUpdateByQueryAction extends HandledTransportAction<UpdateByQueryRequest, BulkByScrollResponse> {
+public class TransportUpdateByQueryAction extends HandledTransportAction<UpdateByQueryRequest, BulkByScrollResponse>
+    implements
+        TransportIndicesResolvingAction<UpdateByQueryRequest> {
 
     private final ThreadPool threadPool;
     private final Client client;
     private final ScriptService scriptService;
     private final ClusterService clusterService;
+    private final TransportSearchAction transportSearchAction;
 
     @Inject
     public TransportUpdateByQueryAction(
@@ -69,7 +75,8 @@ public TransportUpdateByQueryAction(
         Client client,
         TransportService transportService,
         ScriptService scriptService,
-        ClusterService clusterService
+        ClusterService clusterService,
+        TransportSearchAction transportSearchAction
     ) {
         super(
             UpdateByQueryAction.NAME,
@@ -81,6 +88,7 @@ public TransportUpdateByQueryAction(
         this.client = client;
         this.scriptService = scriptService;
         this.clusterService = clusterService;
+        this.transportSearchAction = transportSearchAction;
     }
 
     @Override
@@ -107,6 +115,11 @@ protected void doExecute(Task task, UpdateByQueryRequest request, ActionListener
         );
     }
 
+    @Override
+    public ResolvedIndices resolveIndices(UpdateByQueryRequest request) {
+        return transportSearchAction.resolveIndices(request.getSearchRequest());
+    }
+
     /**
      * Simple implementation of update-by-query using scrolling and bulk.
      */

modules/reindex/src/test/java/org/opensearch/index/reindex/ReindexFromRemoteWithAuthTests.java

@@ -39,6 +39,7 @@
 import org.opensearch.action.search.SearchAction;
 import org.opensearch.action.support.ActionFilter;
 import org.opensearch.action.support.ActionFilterChain;
+import org.opensearch.action.support.ActionRequestMetadata;
 import org.opensearch.action.support.WriteRequest.RefreshPolicy;
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
 import org.opensearch.cluster.service.ClusterService;
@@ -233,6 +234,7 @@ public <Request extends ActionRequest, Response extends ActionResponse> void app
             Task task,
             String action,
             Request request,
+            ActionRequestMetadata<Request, Response> actionRequestMetadata,
             ActionListener<Response> listener,
             ActionFilterChain<Request, Response> chain
         ) {

modules/reindex/src/test/java/org/opensearch/index/reindex/TransportReindexActionTests.java

@@ -0,0 +1,64 @@
+/*
+ * 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.index.reindex;
+
+import org.opensearch.action.index.IndexAction;
+import org.opensearch.action.index.IndexRequest;
+import org.opensearch.action.search.SearchRequest;
+import org.opensearch.action.search.TransportSearchAction;
+import org.opensearch.action.support.ActionFilters;
+import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
+import org.opensearch.cluster.metadata.ResolvedIndices;
+import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.settings.Settings;
+import org.opensearch.common.util.concurrent.ThreadContext;
+import org.opensearch.script.ScriptService;
+import org.opensearch.test.OpenSearchTestCase;
+import org.opensearch.threadpool.ThreadPool;
+import org.opensearch.transport.TransportService;
+import org.opensearch.transport.client.Client;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class TransportReindexActionTests extends OpenSearchTestCase {
+    public void testResolveIndices() {
+        ThreadContext threadContext = new ThreadContext(Settings.EMPTY);
+        ThreadPool threadPool = mock(ThreadPool.class);
+        when(threadPool.getThreadContext()).thenReturn(threadContext);
+        TransportSearchAction transportSearchAction = mock(TransportSearchAction.class);
+        when(transportSearchAction.resolveIndices(any())).thenAnswer(i -> ResolvedIndices.of(((SearchRequest) i.getArgument(0)).indices()));
+        IndexNameExpressionResolver indexNameExpressionResolver = new IndexNameExpressionResolver(threadContext);
+
+        TransportReindexAction action = new TransportReindexAction(
+            Settings.EMPTY,
+            threadPool,
+            mock(ActionFilters.class),
+            indexNameExpressionResolver,
+            mock(ClusterService.class),
+            mock(ScriptService.class),
+            null,
+            mock(Client.class),
+            mock(TransportService.class),
+            mock(ReindexSslConfig.class),
+            transportSearchAction
+        );
+
+        {
+            ResolvedIndices resolvedIndices = action.resolveIndices(
+                new ReindexRequest(new SearchRequest("searched-index"), new IndexRequest("target-index"))
+            );
+            assertEquals(
+                ResolvedIndices.of("searched-index").withLocalSubActions(IndexAction.INSTANCE, ResolvedIndices.Local.of("target-index")),
+                resolvedIndices
+            );
+        }
+    }
+}

modules/reindex/src/test/java/org/opensearch/index/reindex/UpdateByQueryWithScriptTests.java

@@ -79,6 +79,7 @@ protected TransportUpdateByQueryAction.AsyncIndexBySearchAction action(ScriptSer
             null,
             transportService,
             scriptService,
+            null,
             null
         );
         return new TransportUpdateByQueryAction.AsyncIndexBySearchAction(