Add temporary LegacyActionRequest (elastic#128107)

In order to remove ActionType, ActionRequest will become strongly typed,
referring to the ActionResponse type. As a precursor to that, this
commit adds a LegacyActionRequest which all existing ActionRequest
implementations now inherit from. This will allow adding the
ActionResponse type to ActionRequest in a future commit without
modifying every implementation at once.

Author: rjernst

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

@@ -10,10 +10,10 @@
 
 import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
 import org.elasticsearch.client.internal.node.NodeClient;
@@ -43,11 +43,11 @@
 
 public class GrokProcessorGetAction {
 
-    static final ActionType<GrokProcessorGetAction.Response> INSTANCE = new ActionType<>("cluster:admin/ingest/processor/grok/get");
+    static final ActionType<Response> INSTANCE = new ActionType<>("cluster:admin/ingest/processor/grok/get");
 
     private GrokProcessorGetAction() {/* no instances */}
 
-    public static class Request extends ActionRequest {
+    public static class Request extends LegacyActionRequest {
 
         private final boolean sorted;
         private final String ecsCompatibility;

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

@@ -9,9 +9,9 @@
 
 package org.elasticsearch.script.mustache;
 
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.CompositeIndicesRequest;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.search.MultiSearchRequest;
 import org.elasticsearch.action.search.SearchRequest;
 import org.elasticsearch.action.support.IndicesOptions;
@@ -30,7 +30,7 @@
 
 import static org.elasticsearch.action.ValidateActions.addValidationError;
 
-public class MultiSearchTemplateRequest extends ActionRequest implements CompositeIndicesRequest {
+public class MultiSearchTemplateRequest extends LegacyActionRequest implements CompositeIndicesRequest {
 
     private int maxConcurrentSearchRequests = 0;
     private List<SearchTemplateRequest> requests = new ArrayList<>();

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

@@ -9,9 +9,9 @@
 
 package org.elasticsearch.script.mustache;
 
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.CompositeIndicesRequest;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.search.SearchRequest;
 import org.elasticsearch.common.ParsingException;
 import org.elasticsearch.common.Strings;
@@ -34,7 +34,7 @@
 /**
  * A request to execute a search based on a search template.
  */
-public class SearchTemplateRequest extends ActionRequest implements CompositeIndicesRequest, ToXContentObject {
+public class SearchTemplateRequest extends LegacyActionRequest implements CompositeIndicesRequest, ToXContentObject {
 
     private SearchRequest request;
     private boolean simulate = false;
@@ -171,6 +171,7 @@ public ActionRequestValidationException validate() {
     private static final ParseField PROFILE_FIELD = new ParseField("profile");
 
     private static final ObjectParser<SearchTemplateRequest, Void> PARSER;
+
     static {
         PARSER = new ObjectParser<>("search_template");
         PARSER.declareField((parser, request, s) -> request.setScriptParams(parser.map()), PARAMS_FIELD, ObjectParser.ValueType.OBJECT);

modules/lang-painless/src/main/java/org/elasticsearch/painless/action/PainlessContextAction.java

@@ -10,10 +10,10 @@
 package org.elasticsearch.painless.action;
 
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
 import org.elasticsearch.client.internal.node.NodeClient;
@@ -61,7 +61,7 @@ public class PainlessContextAction {
 
     private PainlessContextAction() {/* no instances */}
 
-    public static class Request extends ActionRequest {
+    public static class Request extends LegacyActionRequest {
 
         private String scriptContextName;
 

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

@@ -10,9 +10,9 @@
 package org.elasticsearch.index.rankeval;
 
 import org.elasticsearch.TransportVersions;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.IndicesRequest;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.search.SearchRequest;
 import org.elasticsearch.action.search.SearchType;
 import org.elasticsearch.action.support.IndicesOptions;
@@ -27,7 +27,7 @@
 /**
  * Request to perform a search ranking evaluation.
  */
-public final class RankEvalRequest extends ActionRequest implements IndicesRequest.Replaceable {
+public final class RankEvalRequest extends LegacyActionRequest implements IndicesRequest.Replaceable {
 
     private RankEvalSpec rankingEvaluationSpec;
 

modules/rest-root/src/main/java/org/elasticsearch/rest/root/MainRequest.java

@@ -9,14 +9,14 @@
 
 package org.elasticsearch.rest.root;
 
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.common.io.stream.StreamOutput;
 
 import java.io.IOException;
 
-public class MainRequest extends ActionRequest {
+public class MainRequest extends LegacyActionRequest {
     @Override
     public ActionRequestValidationException validate() {
         return null;

modules/transport-netty4/src/internalClusterTest/java/org/elasticsearch/http/netty4/Netty4ChunkedContinuationsIT.java

@@ -15,11 +15,11 @@
 import org.elasticsearch.ESNetty4IntegTestCase;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionRunnable;
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.CountDownActionListener;
 import org.elasticsearch.action.support.SubscribableListener;
@@ -337,14 +337,14 @@ public static class YieldsContinuationsPlugin extends Plugin implements ActionPl
         static final String ROUTE = "/_test/yields_continuations";
         static final String FAIL_INDEX_PARAM = "fail_index";
 
-        private static final ActionType<YieldsContinuationsPlugin.Response> TYPE = new ActionType<>("test:yields_continuations");
+        private static final ActionType<Response> TYPE = new ActionType<>("test:yields_continuations");
 
         @Override
         public Collection<ActionHandler<? extends ActionRequest, ? extends ActionResponse>> getActions() {
             return List.of(new ActionHandler<>(TYPE, TransportYieldsContinuationsAction.class));
         }
 
-        public static class Request extends ActionRequest {
+        public static class Request extends LegacyActionRequest {
             final int failIndex;
 
             public Request(int failIndex) {
@@ -525,7 +525,7 @@ public static class InfiniteContinuationsPlugin extends Plugin implements Action
             return List.of(new ActionHandler<>(TYPE, TransportInfiniteContinuationsAction.class));
         }
 
-        public static class Request extends ActionRequest {
+        public static class Request extends LegacyActionRequest {
             @Override
             public ActionRequestValidationException validate() {
                 return null;

server/src/internalClusterTest/java/org/elasticsearch/action/admin/cluster/node/tasks/CancellableTasksIT.java

@@ -14,11 +14,11 @@
 import org.elasticsearch.action.ActionFuture;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.ActionListenerResponseHandler;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionType;
 import org.elasticsearch.action.LatchedActionListener;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.GroupedActionListener;
@@ -118,6 +118,7 @@ static void randomDescendants(TestRequest request, Set<TestRequest> result) {
 
     /**
      * Allow some parts of the request to be completed
+     *
      * @return a pending child requests
      */
     static Set<TestRequest> allowPartialRequest(TestRequest request) throws Exception {
@@ -418,7 +419,7 @@ static void waitForRootTask(ActionFuture<TestResponse> rootTask, boolean expectT
         }
     }
 
-    static class TestRequest extends ActionRequest {
+    static class TestRequest extends LegacyActionRequest {
         final int id;
         final DiscoveryNode node;
         final List<TestRequest> subRequests;

server/src/internalClusterTest/java/org/elasticsearch/action/admin/cluster/tasks/ListTasksIT.java

@@ -10,11 +10,11 @@
 package org.elasticsearch.action.admin.cluster.tasks;
 
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionRunnable;
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
 import org.elasticsearch.action.support.PlainActionFuture;
@@ -142,7 +142,7 @@ public static class TestPlugin extends Plugin implements ActionPlugin {
         }
     }
 
-    public static class TestRequest extends ActionRequest {
+    public static class TestRequest extends LegacyActionRequest {
         @Override
         public ActionRequestValidationException validate() {
             return null;

server/src/internalClusterTest/java/org/elasticsearch/search/rank/MockedRequestActionBasedRerankerIT.java

@@ -16,10 +16,10 @@
 import org.elasticsearch.TransportVersion;
 import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.LegacyActionRequest;
 import org.elasticsearch.action.search.SearchPhaseController;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.HandledTransportAction;
@@ -142,7 +142,7 @@ public static class TestRerankingActionType extends ActionType<TestRerankingActi
         }
     }
 
-    public static class TestRerankingActionRequest extends ActionRequest {
+    public static class TestRerankingActionRequest extends LegacyActionRequest {
 
         private final List<String> docFeatures;