Core: Remove ThreadPool from base TransportAction (#31492)

Most transport actions don't need the node ThreadPool. This commit
removes the ThreadPool as a super constructor parameter for
TransportAction. The actions that do need the thread pool then have a
member added to keep it from their own constructor.

Author: rjernst

client/client-benchmark-noop-api-plugin/src/main/java/org/elasticsearch/plugin/noop/action/bulk/TransportNoopBulkAction.java

@@ -19,8 +19,8 @@
 package org.elasticsearch.plugin.noop.action.bulk;
 
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.DocWriteResponse;
 import org.elasticsearch.action.DocWriteRequest;
+import org.elasticsearch.action.DocWriteResponse;
 import org.elasticsearch.action.bulk.BulkItemResponse;
 import org.elasticsearch.action.bulk.BulkRequest;
 import org.elasticsearch.action.bulk.BulkResponse;
@@ -30,17 +30,15 @@
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.shard.ShardId;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 public class TransportNoopBulkAction extends HandledTransportAction<BulkRequest, BulkResponse> {
     private static final BulkItemResponse ITEM_RESPONSE = new BulkItemResponse(1, DocWriteRequest.OpType.UPDATE,
         new UpdateResponse(new ShardId("mock", "", 1), "mock_type", "1", 1L, DocWriteResponse.Result.CREATED));
 
     @Inject
-    public TransportNoopBulkAction(Settings settings, ThreadPool threadPool, TransportService transportService,
-                                      ActionFilters actionFilters) {
-        super(settings, NoopBulkAction.NAME, threadPool, transportService, actionFilters, BulkRequest::new);
+    public TransportNoopBulkAction(Settings settings, TransportService transportService, ActionFilters actionFilters) {
+        super(settings, NoopBulkAction.NAME, transportService, actionFilters, BulkRequest::new);
     }
 
     @Override

client/client-benchmark-noop-api-plugin/src/main/java/org/elasticsearch/plugin/noop/action/search/TransportNoopSearchAction.java

@@ -27,23 +27,20 @@
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.search.aggregations.InternalAggregations;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.SearchHits;
+import org.elasticsearch.search.aggregations.InternalAggregations;
 import org.elasticsearch.search.internal.InternalSearchResponse;
 import org.elasticsearch.search.profile.SearchProfileShardResults;
 import org.elasticsearch.search.suggest.Suggest;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.util.Collections;
 
 public class TransportNoopSearchAction extends HandledTransportAction<SearchRequest, SearchResponse> {
     @Inject
-    public TransportNoopSearchAction(Settings settings, ThreadPool threadPool, TransportService transportService,
-                                     ActionFilters actionFilters) {
-        super(settings, NoopSearchAction.NAME, threadPool, transportService, actionFilters,
-              (Writeable.Reader<SearchRequest>) SearchRequest::new);
+    public TransportNoopSearchAction(Settings settings, TransportService transportService, ActionFilters actionFilters) {
+        super(settings, NoopSearchAction.NAME, transportService, actionFilters, (Writeable.Reader<SearchRequest>) SearchRequest::new);
     }
 
     @Override

modules/ingest-common/src/main/java/org/elasticsearch/ingest/common/GrokProcessorGetAction.java

@@ -41,7 +41,6 @@
 import org.elasticsearch.rest.RestRequest;
 import org.elasticsearch.rest.RestResponse;
 import org.elasticsearch.rest.action.RestBuilderListener;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.io.IOException;
@@ -114,9 +113,8 @@ public void writeTo(StreamOutput out) throws IOException {
     public static class TransportAction extends HandledTransportAction<Request, Response> {
 
         @Inject
-        public TransportAction(Settings settings, ThreadPool threadPool, TransportService transportService,
-                               ActionFilters actionFilters) {
-            super(settings, NAME, threadPool, transportService, actionFilters, Request::new);
+        public TransportAction(Settings settings, TransportService transportService, ActionFilters actionFilters) {
+            super(settings, NAME, transportService, actionFilters, Request::new);
         }
 
         @Override

modules/lang-mustache/src/main/java/org/elasticsearch/script/mustache/TransportMultiSearchTemplateAction.java

@@ -30,7 +30,6 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.script.ScriptService;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.util.ArrayList;
@@ -45,10 +44,10 @@ public class TransportMultiSearchTemplateAction extends HandledTransportAction<M
     private final NodeClient client;
 
     @Inject
-    public TransportMultiSearchTemplateAction(Settings settings, ThreadPool threadPool, TransportService transportService,
+    public TransportMultiSearchTemplateAction(Settings settings, TransportService transportService,
                                               ActionFilters actionFilters, ScriptService scriptService,
                                               NamedXContentRegistry xContentRegistry, NodeClient client) {
-        super(settings, MultiSearchTemplateAction.NAME, threadPool, transportService, actionFilters, MultiSearchTemplateRequest::new);
+        super(settings, MultiSearchTemplateAction.NAME, transportService, actionFilters, MultiSearchTemplateRequest::new);
         this.scriptService = scriptService;
         this.xContentRegistry = xContentRegistry;
         this.client = client;

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

@@ -38,7 +38,6 @@
 import org.elasticsearch.script.ScriptType;
 import org.elasticsearch.script.TemplateScript;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.io.IOException;
@@ -54,11 +53,10 @@ public class TransportSearchTemplateAction extends HandledTransportAction<Search
     private final NodeClient client;
 
     @Inject
-    public TransportSearchTemplateAction(Settings settings, ThreadPool threadPool, TransportService transportService,
-                                         ActionFilters actionFilters, ScriptService scriptService, NamedXContentRegistry xContentRegistry,
-                                         NodeClient client) {
-        super(settings, SearchTemplateAction.NAME, threadPool, transportService, actionFilters,
-              (Supplier<SearchTemplateRequest>) SearchTemplateRequest::new);
+    public TransportSearchTemplateAction(Settings settings, TransportService transportService, ActionFilters actionFilters,
+                                         ScriptService scriptService, NamedXContentRegistry xContentRegistry, NodeClient client) {
+        super(settings, SearchTemplateAction.NAME, transportService, actionFilters,
+            (Supplier<SearchTemplateRequest>) SearchTemplateRequest::new);
         this.scriptService = scriptService;
         this.xContentRegistry = xContentRegistry;
         this.client = client;

modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessExecuteAction.java

@@ -48,7 +48,6 @@
 import org.elasticsearch.script.ScriptContext;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.ScriptType;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.io.IOException;
@@ -280,9 +279,9 @@ public static class TransportAction extends HandledTransportAction<Request, Resp
         private final ScriptService scriptService;
 
         @Inject
-        public TransportAction(Settings settings, ThreadPool threadPool, TransportService transportService,
+        public TransportAction(Settings settings, TransportService transportService,
                                ActionFilters actionFilters, ScriptService scriptService) {
-            super(settings, NAME, threadPool, transportService, actionFilters, Request::new);
+            super(settings, NAME, transportService, actionFilters, Request::new);
             this.scriptService = scriptService;
         }
         @Override

modules/rank-eval/src/main/java/org/elasticsearch/index/rankeval/TransportRankEvalAction.java

@@ -40,7 +40,6 @@
 import org.elasticsearch.script.TemplateScript;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
-import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.io.IOException;
@@ -73,10 +72,10 @@ public class TransportRankEvalAction extends HandledTransportAction<RankEvalRequ
     private final NamedXContentRegistry namedXContentRegistry;
 
     @Inject
-    public TransportRankEvalAction(Settings settings, ThreadPool threadPool, ActionFilters actionFilters, Client client,
+    public TransportRankEvalAction(Settings settings, ActionFilters actionFilters, Client client,
                                    TransportService transportService, ScriptService scriptService,
                                    NamedXContentRegistry namedXContentRegistry) {
-        super(settings, RankEvalAction.NAME, threadPool, transportService, actionFilters,
+        super(settings, RankEvalAction.NAME, transportService, actionFilters,
               (Writeable.Reader<RankEvalRequest>) RankEvalRequest::new);
         this.scriptService = scriptService;
         this.namedXContentRegistry = namedXContentRegistry;

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

@@ -19,8 +19,6 @@
 
 package org.elasticsearch.index.reindex;
 
-import java.util.function.Supplier;
-
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
@@ -35,16 +33,21 @@
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
+import java.util.function.Supplier;
+
 public class TransportDeleteByQueryAction extends HandledTransportAction<DeleteByQueryRequest, BulkByScrollResponse> {
+
+    private final ThreadPool threadPool;
     private final Client client;
     private final ScriptService scriptService;
     private final ClusterService clusterService;
 
     @Inject
     public TransportDeleteByQueryAction(Settings settings, ThreadPool threadPool, ActionFilters actionFilters, Client client,
                                         TransportService transportService, ScriptService scriptService, ClusterService clusterService) {
-        super(settings, DeleteByQueryAction.NAME, threadPool, transportService, actionFilters,
+        super(settings, DeleteByQueryAction.NAME, transportService, actionFilters,
             (Supplier<DeleteByQueryRequest>) DeleteByQueryRequest::new);
+        this.threadPool = threadPool;
         this.client = client;
         this.scriptService = scriptService;
         this.clusterService = clusterService;

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

@@ -92,6 +92,7 @@ public class TransportReindexAction extends HandledTransportAction<ReindexReques
     public static final Setting<List<String>> REMOTE_CLUSTER_WHITELIST =
             Setting.listSetting("reindex.remote.whitelist", emptyList(), Function.identity(), Property.NodeScope);
 
+    private final ThreadPool threadPool;
     private final ClusterService clusterService;
     private final ScriptService scriptService;
     private final AutoCreateIndex autoCreateIndex;
@@ -103,8 +104,8 @@ public class TransportReindexAction extends HandledTransportAction<ReindexReques
     public TransportReindexAction(Settings settings, ThreadPool threadPool, ActionFilters actionFilters,
             IndexNameExpressionResolver indexNameExpressionResolver, ClusterService clusterService, ScriptService scriptService,
             AutoCreateIndex autoCreateIndex, Client client, TransportService transportService) {
-        super(settings, ReindexAction.NAME, threadPool, transportService, actionFilters,
-            ReindexRequest::new);
+        super(settings, ReindexAction.NAME, transportService, actionFilters, ReindexRequest::new);
+        this.threadPool = threadPool;
         this.clusterService = clusterService;
         this.scriptService = scriptService;
         this.autoCreateIndex = autoCreateIndex;

modules/reindex/src/main/java/org/elasticsearch/index/reindex/TransportRethrottleAction.java

@@ -43,9 +43,9 @@ public class TransportRethrottleAction extends TransportTasksAction<BulkByScroll
     private final Client client;
 
     @Inject
-    public TransportRethrottleAction(Settings settings, ThreadPool threadPool, ClusterService clusterService,
+    public TransportRethrottleAction(Settings settings, ClusterService clusterService,
             TransportService transportService, ActionFilters actionFilters, Client client) {
-        super(settings, RethrottleAction.NAME, threadPool, clusterService, transportService, actionFilters,
+        super(settings, RethrottleAction.NAME, clusterService, transportService, actionFilters,
             RethrottleRequest::new, ListTasksResponse::new, ThreadPool.Names.MANAGEMENT);
         this.client = client;
     }