TransportNodesAction impls are local-only

There are no remote invocations of any actions derived from
`TransportNodesAction` so there is no need to register the top-level
action with the `TransportService`, and that means that all the code
related to de/serialization of the top-level request and response is
unused and can be removed.

Relates #100111
Relates #100878

modules/ingest-geoip/src/main/java/org/elasticsearch/ingest/geoip/stats/GeoIpDownloaderStatsAction.java

@@ -11,6 +11,7 @@
 import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionType;
 import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodeResponse;
 import org.elasticsearch.action.support.nodes.BaseNodesRequest;
 import org.elasticsearch.action.support.nodes.BaseNodesResponse;
@@ -44,10 +45,6 @@ public Request() {
             super((String[]) null);
         }
 
-        public Request(StreamInput in) throws IOException {
-            super(in);
-        }
-
         @Override
         public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
             builder.startObject();
@@ -71,16 +68,19 @@ public boolean equals(Object obj) {
             }
             return true;
         }
+
+        @Override
+        public void writeTo(StreamOutput out) {
+            TransportAction.localOnly();
+        }
     }
 
     public static class NodeRequest extends TransportRequest {
         public NodeRequest(StreamInput in) throws IOException {
             super(in);
         }
 
-        public NodeRequest(Request request) {
-
-        }
+        public NodeRequest() {}
     }
 
     public static class Response extends BaseNodesResponse<NodeResponse> implements Writeable, ToXContentObject {

modules/ingest-geoip/src/main/java/org/elasticsearch/ingest/geoip/stats/GeoIpDownloaderStatsTransportAction.java

@@ -46,11 +46,9 @@ public GeoIpDownloaderStatsTransportAction(
     ) {
         super(
             GeoIpDownloaderStatsAction.NAME,
-            threadPool,
             clusterService,
             transportService,
             actionFilters,
-            Request::new,
             NodeRequest::new,
             threadPool.executor(ThreadPool.Names.MANAGEMENT)
         );
@@ -66,7 +64,7 @@ protected Response newResponse(Request request, List<NodeResponse> nodeResponses
 
     @Override
     protected NodeRequest newNodeRequest(Request request) {
-        return new NodeRequest(request);
+        return new NodeRequest();
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/cluster/node/hotthreads/NodesHotThreadsAction.java

@@ -9,13 +9,14 @@
 package org.elasticsearch.action.admin.cluster.node.hotthreads;
 
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.common.io.stream.Writeable;
 
 public class NodesHotThreadsAction extends ActionType<NodesHotThreadsResponse> {
 
     public static final NodesHotThreadsAction INSTANCE = new NodesHotThreadsAction();
     public static final String NAME = "cluster:monitor/nodes/hot_threads";
 
     private NodesHotThreadsAction() {
-        super(NAME, NodesHotThreadsResponse::new);
+        super(NAME, Writeable.Reader.localOnly());
     }
 }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/hotthreads/NodesHotThreadsResponse.java

@@ -9,6 +9,7 @@
 package org.elasticsearch.action.admin.cluster.node.hotthreads;
 
 import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodesResponse;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.common.collect.Iterators;
@@ -26,10 +27,6 @@
 
 public class NodesHotThreadsResponse extends BaseNodesResponse<NodeHotThreads> {
 
-    public NodesHotThreadsResponse(StreamInput in) throws IOException {
-        super(in);
-    }
-
     public NodesHotThreadsResponse(ClusterName clusterName, List<NodeHotThreads> nodes, List<FailedNodeException> failures) {
         super(clusterName, nodes, failures);
     }
@@ -52,7 +49,7 @@ protected List<NodeHotThreads> readNodesFrom(StreamInput in) throws IOException
 
     @Override
     protected void writeNodesTo(StreamOutput out, List<NodeHotThreads> nodes) throws IOException {
-        out.writeCollection(nodes);
+        TransportAction.localOnly();
     }
 
     private static class LinesIterator implements Iterator<String> {

server/src/main/java/org/elasticsearch/action/admin/cluster/node/hotthreads/TransportNodesHotThreadsAction.java

@@ -41,11 +41,9 @@ public TransportNodesHotThreadsAction(
     ) {
         super(
             NodesHotThreadsAction.NAME,
-            threadPool,
             clusterService,
             transportService,
             actionFilters,
-            NodesHotThreadsRequest::new,
             NodeRequest::new,
             threadPool.executor(ThreadPool.Names.GENERIC)
         );
@@ -87,6 +85,7 @@ protected NodeHotThreads nodeOperation(NodeRequest request, Task task) {
 
     public static class NodeRequest extends TransportRequest {
 
+        // TODO don't wrap the whole top-level request, it contains heavy and irrelevant DiscoveryNode things; see #100878
         NodesHotThreadsRequest request;
 
         public NodeRequest(StreamInput in) throws IOException {

server/src/main/java/org/elasticsearch/action/admin/cluster/node/info/NodesInfoAction.java

@@ -9,13 +9,14 @@
 package org.elasticsearch.action.admin.cluster.node.info;
 
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.common.io.stream.Writeable;
 
 public class NodesInfoAction extends ActionType<NodesInfoResponse> {
 
     public static final NodesInfoAction INSTANCE = new NodesInfoAction();
     public static final String NAME = "cluster:monitor/nodes/info";
 
     private NodesInfoAction() {
-        super(NAME, NodesInfoResponse::new);
+        super(NAME, Writeable.Reader.localOnly());
     }
 }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/info/NodesInfoRequest.java

@@ -22,7 +22,7 @@
  */
 public class NodesInfoRequest extends BaseNodesRequest<NodesInfoRequest> {
 
-    private NodesInfoMetrics nodesInfoMetrics;
+    private final NodesInfoMetrics nodesInfoMetrics;
 
     /**
      * Create a new NodeInfoRequest from a {@link StreamInput} object.
@@ -118,20 +118,6 @@ public void writeTo(StreamOutput out) throws IOException {
         nodesInfoMetrics.writeTo(out);
     }
 
-    /**
-     * Helper method for creating NodesInfoRequests with desired metrics
-     * @param metrics the metrics to include in the request
-     * @return
-     */
-    public static NodesInfoRequest requestWithMetrics(NodesInfoMetrics.Metric... metrics) {
-        NodesInfoRequest nodesInfoRequest = new NodesInfoRequest();
-        nodesInfoRequest.clear();
-        for (var metric : metrics) {
-            nodesInfoRequest.addMetric(metric.metricName());
-        }
-        return nodesInfoRequest;
-    }
-
     public NodesInfoMetrics getNodesInfoMetrics() {
         return nodesInfoMetrics;
     }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/info/NodesInfoResponse.java

@@ -9,6 +9,7 @@
 package org.elasticsearch.action.admin.cluster.node.info;
 
 import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodesResponse;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.cluster.node.DiscoveryNodeRole;
@@ -34,22 +35,18 @@
 
 public class NodesInfoResponse extends BaseNodesResponse<NodeInfo> implements ToXContentFragment {
 
-    public NodesInfoResponse(StreamInput in) throws IOException {
-        super(in);
-    }
-
     public NodesInfoResponse(ClusterName clusterName, List<NodeInfo> nodes, List<FailedNodeException> failures) {
         super(clusterName, nodes, failures);
     }
 
     @Override
     protected List<NodeInfo> readNodesFrom(StreamInput in) throws IOException {
-        return in.readCollectionAsList(NodeInfo::new);
+        return TransportAction.localOnly();
     }
 
     @Override
     protected void writeNodesTo(StreamOutput out, List<NodeInfo> nodes) throws IOException {
-        out.writeCollection(nodes);
+        TransportAction.localOnly();
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/cluster/node/info/TransportNodesInfoAction.java

@@ -46,11 +46,9 @@ public TransportNodesInfoAction(
     ) {
         super(
             NodesInfoAction.NAME,
-            threadPool,
             clusterService,
             transportService,
             actionFilters,
-            NodesInfoRequest::new,
             NodeInfoRequest::new,
             threadPool.executor(ThreadPool.Names.MANAGEMENT)
         );
@@ -97,7 +95,7 @@ protected NodeInfo nodeOperation(NodeInfoRequest nodeRequest, Task task) {
 
     public static class NodeInfoRequest extends TransportRequest {
 
-        private NodesInfoMetrics nodesInfoMetrics;
+        private final NodesInfoMetrics nodesInfoMetrics;
 
         public NodeInfoRequest(StreamInput in) throws IOException {
             super(in);

server/src/main/java/org/elasticsearch/action/admin/cluster/node/reload/NodesReloadSecureSettingsAction.java

@@ -9,13 +9,14 @@
 package org.elasticsearch.action.admin.cluster.node.reload;
 
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.common.io.stream.Writeable;
 
 public class NodesReloadSecureSettingsAction extends ActionType<NodesReloadSecureSettingsResponse> {
 
     public static final NodesReloadSecureSettingsAction INSTANCE = new NodesReloadSecureSettingsAction();
     public static final String NAME = "cluster:admin/nodes/reload_secure_settings";
 
     private NodesReloadSecureSettingsAction() {
-        super(NAME, NodesReloadSecureSettingsResponse::new);
+        super(NAME, Writeable.Reader.localOnly());
     }
 }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/reload/NodesReloadSecureSettingsRequest.java

@@ -115,6 +115,8 @@ public void close() {
     }
 
     public static class NodeRequest extends TransportRequest implements Releasable {
+
+        // TODO don't wrap the whole top-level request, it contains heavy and irrelevant DiscoveryNode things; see #100878
         NodesReloadSecureSettingsRequest request;
 
         NodeRequest(StreamInput in) throws IOException {

server/src/main/java/org/elasticsearch/action/admin/cluster/node/reload/NodesReloadSecureSettingsResponse.java

@@ -10,6 +10,7 @@
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodeResponse;
 import org.elasticsearch.action.support.nodes.BaseNodesResponse;
 import org.elasticsearch.cluster.ClusterName;
@@ -30,22 +31,18 @@ public class NodesReloadSecureSettingsResponse extends BaseNodesResponse<NodesRe
     implements
         ToXContentFragment {
 
-    public NodesReloadSecureSettingsResponse(StreamInput in) throws IOException {
-        super(in);
-    }
-
     public NodesReloadSecureSettingsResponse(ClusterName clusterName, List<NodeResponse> nodes, List<FailedNodeException> failures) {
         super(clusterName, nodes, failures);
     }
 
     @Override
     protected List<NodesReloadSecureSettingsResponse.NodeResponse> readNodesFrom(StreamInput in) throws IOException {
-        return in.readCollectionAsList(NodeResponse::new);
+        return TransportAction.localOnly();
     }
 
     @Override
     protected void writeNodesTo(StreamOutput out, List<NodesReloadSecureSettingsResponse.NodeResponse> nodes) throws IOException {
-        out.writeCollection(nodes);
+        TransportAction.localOnly();
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/cluster/node/reload/TransportNodesReloadSecureSettingsAction.java

@@ -55,11 +55,9 @@ public TransportNodesReloadSecureSettingsAction(
     ) {
         super(
             NodesReloadSecureSettingsAction.NAME,
-            threadPool,
             clusterService,
             transportService,
             actionFilters,
-            NodesReloadSecureSettingsRequest::new,
             NodesReloadSecureSettingsRequest.NodeRequest::new,
             threadPool.executor(ThreadPool.Names.GENERIC)
         );

server/src/main/java/org/elasticsearch/action/admin/cluster/node/shutdown/PrevalidateShardPathRequest.java

@@ -8,8 +8,8 @@
 
 package org.elasticsearch.action.admin.cluster.node.shutdown;
 
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodesRequest;
-import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.index.shard.ShardId;
 
@@ -27,15 +27,10 @@ public PrevalidateShardPathRequest(Set<ShardId> shardIds, String... nodeIds) {
         this.shardIds = Set.copyOf(Objects.requireNonNull(shardIds));
     }
 
-    public PrevalidateShardPathRequest(StreamInput in) throws IOException {
-        super(in);
-        this.shardIds = in.readCollectionAsImmutableSet(ShardId::new);
-    }
-
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
-        out.writeCollection(shardIds);
+        TransportAction.localOnly();
     }
 
     public Set<ShardId> getShardIds() {

server/src/main/java/org/elasticsearch/action/admin/cluster/node/shutdown/PrevalidateShardPathResponse.java

@@ -9,6 +9,7 @@
 package org.elasticsearch.action.admin.cluster.node.shutdown;
 
 import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.support.TransportAction;
 import org.elasticsearch.action.support.nodes.BaseNodesResponse;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -27,17 +28,13 @@ public PrevalidateShardPathResponse(
         super(clusterName, nodes, failures);
     }
 
-    public PrevalidateShardPathResponse(StreamInput in) throws IOException {
-        super(in);
-    }
-
     @Override
     protected List<NodePrevalidateShardPathResponse> readNodesFrom(StreamInput in) throws IOException {
-        return in.readCollectionAsList(NodePrevalidateShardPathResponse::new);
+        return TransportAction.localOnly();
     }
 
     @Override
     protected void writeNodesTo(StreamOutput out, List<NodePrevalidateShardPathResponse> nodes) throws IOException {
-        out.writeCollection(nodes);
+        TransportAction.localOnly();
     }
 }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/shutdown/TransportPrevalidateShardPathAction.java

@@ -18,6 +18,7 @@
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.index.IndexSettings;
@@ -46,7 +47,7 @@ public class TransportPrevalidateShardPathAction extends TransportNodesAction<
     NodePrevalidateShardPathResponse> {
 
     public static final String ACTION_NAME = "internal:admin/indices/prevalidate_shard_path";
-    public static final ActionType<PrevalidateShardPathResponse> TYPE = new ActionType<>(ACTION_NAME, PrevalidateShardPathResponse::new);
+    public static final ActionType<PrevalidateShardPathResponse> TYPE = new ActionType<>(ACTION_NAME, Writeable.Reader.localOnly());
     private static final Logger logger = LogManager.getLogger(TransportPrevalidateShardPathAction.class);
 
     private final TransportService transportService;
@@ -64,11 +65,9 @@ public TransportPrevalidateShardPathAction(
     ) {
         super(
             ACTION_NAME,
-            threadPool,
             clusterService,
             transportService,
             actionFilters,
-            PrevalidateShardPathRequest::new,
             NodePrevalidateShardPathRequest::new,
             threadPool.executor(ThreadPool.Names.MANAGEMENT)
         );

server/src/main/java/org/elasticsearch/action/admin/cluster/node/stats/NodesStatsAction.java

@@ -9,13 +9,14 @@
 package org.elasticsearch.action.admin.cluster.node.stats;
 
 import org.elasticsearch.action.ActionType;
+import org.elasticsearch.common.io.stream.Writeable;
 
 public class NodesStatsAction extends ActionType<NodesStatsResponse> {
 
     public static final NodesStatsAction INSTANCE = new NodesStatsAction();
     public static final String NAME = "cluster:monitor/nodes/stats";
 
     private NodesStatsAction() {
-        super(NAME, NodesStatsResponse::new);
+        super(NAME, Writeable.Reader.localOnly());
     }
 }