Use Writeable for TransportReplAction derivatives (#40905)

Relates #34389, backport of #40894.

Author: DaveCTurner

server/src/main/java/org/elasticsearch/action/DocWriteRequest.java

@@ -222,13 +222,9 @@ static DocWriteRequest<?> readDocumentRequest(StreamInput in) throws IOException
         byte type = in.readByte();
         DocWriteRequest<?> docWriteRequest;
         if (type == 0) {
-            IndexRequest indexRequest = new IndexRequest();
-            indexRequest.readFrom(in);
-            docWriteRequest = indexRequest;
+            docWriteRequest = new IndexRequest(in);
         } else if (type == 1) {
-            DeleteRequest deleteRequest = new DeleteRequest();
-            deleteRequest.readFrom(in);
-            docWriteRequest = deleteRequest;
+            docWriteRequest = new DeleteRequest(in);
         } else if (type == 2) {
             UpdateRequest updateRequest = new UpdateRequest();
             updateRequest.readFrom(in);

server/src/main/java/org/elasticsearch/action/admin/indices/close/TransportVerifyShardBeforeCloseAction.java

@@ -136,9 +136,11 @@ public void markShardCopyAsStaleIfNeeded(final ShardId shardId, final String all
 
     public static class ShardRequest extends ReplicationRequest<ShardRequest> {
 
-        private ClusterBlock clusterBlock;
+        private final ClusterBlock clusterBlock;
 
-        ShardRequest(){
+        ShardRequest(StreamInput in) throws IOException {
+            super(in);
+            clusterBlock = new ClusterBlock(in);
         }
 
         public ShardRequest(final ShardId shardId, final ClusterBlock clusterBlock, final TaskId parentTaskId) {
@@ -153,9 +155,8 @@ public String toString() {
         }
 
         @Override
-        public void readFrom(final StreamInput in) throws IOException {
-            super.readFrom(in);
-            clusterBlock = new ClusterBlock(in);
+        public void readFrom(final StreamInput in) {
+            throw new UnsupportedOperationException("usage of Streamable is to be replaced by Writeable");
         }
 
         @Override

server/src/main/java/org/elasticsearch/action/admin/indices/flush/FlushRequest.java

@@ -52,6 +52,12 @@ public FlushRequest(String... indices) {
         super(indices);
     }
 
+    public FlushRequest(StreamInput in) throws IOException {
+        super(in);
+        force = in.readBoolean();
+        waitIfOngoing = in.readBoolean();
+    }
+
     /**
      * Returns {@code true} iff a flush should block
      * if a another flush operation is already running. Otherwise {@code false}
@@ -103,9 +109,7 @@ public void writeTo(StreamOutput out) throws IOException {
 
     @Override
     public void readFrom(StreamInput in) throws IOException {
-        super.readFrom(in);
-        force = in.readBoolean();
-        waitIfOngoing = in.readBoolean();
+        throw new UnsupportedOperationException("usage of Streamable is to be replaced by Writeable");
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/indices/flush/ShardFlushRequest.java

@@ -29,15 +29,17 @@
 
 public class ShardFlushRequest extends ReplicationRequest<ShardFlushRequest> {
 
-    private FlushRequest request = new FlushRequest();
+    private final FlushRequest request;
 
     public ShardFlushRequest(FlushRequest request, ShardId shardId) {
         super(shardId);
         this.request = request;
         this.waitForActiveShards = ActiveShardCount.NONE; // don't wait for any active shards before proceeding, by default
     }
 
-    public ShardFlushRequest() {
+    public ShardFlushRequest(StreamInput in) throws IOException {
+        super(in);
+        request = new FlushRequest(in);
     }
 
     FlushRequest getRequest() {
@@ -46,8 +48,7 @@ FlushRequest getRequest() {
 
     @Override
     public void readFrom(StreamInput in) throws IOException {
-        super.readFrom(in);
-        request.readFrom(in);
+        throw new UnsupportedOperationException("usage of Streamable is to be replaced by Writeable");
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/indices/flush/TransportShardFlushAction.java

@@ -55,7 +55,7 @@ protected PrimaryResult<ShardFlushRequest, ReplicationResponse> shardOperationOn
             IndexShard primary) {
         primary.flush(shardRequest.getRequest());
         logger.trace("{} flush request executed on primary", primary.shardId());
-        return new PrimaryResult<ShardFlushRequest, ReplicationResponse>(shardRequest, new ReplicationResponse());
+        return new PrimaryResult<>(shardRequest, new ReplicationResponse());
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/admin/indices/refresh/RefreshRequest.java

@@ -20,6 +20,9 @@
 package org.elasticsearch.action.admin.indices.refresh;
 
 import org.elasticsearch.action.support.broadcast.BroadcastRequest;
+import org.elasticsearch.common.io.stream.StreamInput;
+
+import java.io.IOException;
 
 /**
  * A refresh request making all operations performed since the last refresh available for search. The (near) real-time
@@ -35,4 +38,8 @@ public class RefreshRequest extends BroadcastRequest<RefreshRequest> {
     public RefreshRequest(String... indices) {
         super(indices);
     }
+
+    public RefreshRequest(StreamInput in) throws IOException {
+        super(in);
+    }
 }

server/src/main/java/org/elasticsearch/action/bulk/BulkShardRequest.java

@@ -33,7 +33,14 @@ public class BulkShardRequest extends ReplicatedWriteRequest<BulkShardRequest> {
 
     private BulkItemRequest[] items;
 
-    public BulkShardRequest() {
+    public BulkShardRequest(StreamInput in) throws IOException {
+        super(in);
+        items = new BulkItemRequest[in.readVInt()];
+        for (int i = 0; i < items.length; i++) {
+            if (in.readBoolean()) {
+                items[i] = BulkItemRequest.readBulkItem(in);
+            }
+        }
     }
 
     public BulkShardRequest(ShardId shardId, RefreshPolicy refreshPolicy, BulkItemRequest[] items) {
@@ -60,7 +67,7 @@ public String[] indices() {
                 indices.add(item.index());
             }
         }
-        return indices.toArray(new String[indices.size()]);
+        return indices.toArray(new String[0]);
     }
 
     @Override
@@ -78,14 +85,8 @@ public void writeTo(StreamOutput out) throws IOException {
     }
 
     @Override
-    public void readFrom(StreamInput in) throws IOException {
-        super.readFrom(in);
-        items = new BulkItemRequest[in.readVInt()];
-        for (int i = 0; i < items.length; i++) {
-            if (in.readBoolean()) {
-                items[i] = BulkItemRequest.readBulkItem(in);
-            }
-        }
+    public void readFrom(StreamInput in) {
+        throw new UnsupportedOperationException("usage of Streamable is to be replaced by Writeable");
     }
 
     @Override

server/src/main/java/org/elasticsearch/action/bulk/TransportSingleItemBulkWriteAction.java

@@ -28,11 +28,10 @@
 import org.elasticsearch.action.support.WriteResponse;
 import org.elasticsearch.action.support.replication.ReplicatedWriteRequest;
 import org.elasticsearch.action.support.replication.ReplicationResponse;
+import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.transport.TransportService;
 
-import java.util.function.Supplier;
-
 /** use transport bulk action directly */
 @Deprecated
 public abstract class TransportSingleItemBulkWriteAction<
@@ -43,8 +42,8 @@ public abstract class TransportSingleItemBulkWriteAction<
     private final TransportBulkAction bulkAction;
 
     protected TransportSingleItemBulkWriteAction(String actionName, TransportService transportService, ActionFilters actionFilters,
-                                                 Supplier<Request> request, TransportBulkAction bulkAction) {
-        super(actionName, transportService, actionFilters, request);
+                                                 Writeable.Reader<Request> requestReader, TransportBulkAction bulkAction) {
+        super(actionName, transportService, actionFilters, requestReader);
         this.bulkAction = bulkAction;
     }
 

server/src/main/java/org/elasticsearch/action/delete/DeleteRequest.java

@@ -53,6 +53,8 @@
 public class DeleteRequest extends ReplicatedWriteRequest<DeleteRequest>
         implements DocWriteRequest<DeleteRequest>, CompositeIndicesRequest {
 
+    private static final ShardId NO_SHARD_ID = null;
+
     // Set to null initially so we can know to override in bulk requests that have a default type.
     private String type;
     private String id;
@@ -63,14 +65,35 @@ public class DeleteRequest extends ReplicatedWriteRequest<DeleteRequest>
     private long ifSeqNo = UNASSIGNED_SEQ_NO;
     private long ifPrimaryTerm = UNASSIGNED_PRIMARY_TERM;
 
+    public DeleteRequest(StreamInput in) throws IOException {
+        super(in);
+        type = in.readString();
+        id = in.readString();
+        routing = in.readOptionalString();
+        if (in.getVersion().before(Version.V_7_0_0)) {
+            in.readOptionalString(); // _parent
+        }
+        version = in.readLong();
+        versionType = VersionType.fromValue(in.readByte());
+        if (in.getVersion().onOrAfter(Version.V_6_6_0)) {
+            ifSeqNo = in.readZLong();
+            ifPrimaryTerm = in.readVLong();
+        } else {
+            ifSeqNo = UNASSIGNED_SEQ_NO;
+            ifPrimaryTerm = UNASSIGNED_PRIMARY_TERM;
+        }
+    }
+
     public DeleteRequest() {
+        super(NO_SHARD_ID);
     }
 
     /**
      * Constructs a new delete request against the specified index. The {@link #type(String)} and {@link #id(String)}
      * must be set.
      */
     public DeleteRequest(String index) {
+        super(NO_SHARD_ID);
         this.index = index;
     }
 
@@ -85,6 +108,7 @@ public DeleteRequest(String index) {
      */
     @Deprecated
     public DeleteRequest(String index, String type, String id) {
+        super(NO_SHARD_ID);
         this.index = index;
         this.type = type;
         this.id = id;
@@ -97,6 +121,7 @@ public DeleteRequest(String index, String type, String id) {
      * @param id    The id of the document
      */
     public DeleteRequest(String index, String id) {
+        super(NO_SHARD_ID);
         this.index = index;
         this.id = id;
     }
@@ -274,23 +299,8 @@ public OpType opType() {
     }
 
     @Override
-    public void readFrom(StreamInput in) throws IOException {
-        super.readFrom(in);
-        type = in.readString();
-        id = in.readString();
-        routing = in.readOptionalString();
-        if (in.getVersion().before(Version.V_7_0_0)) {
-            in.readOptionalString(); // _parent
-        }
-        version = in.readLong();
-        versionType = VersionType.fromValue(in.readByte());
-        if (in.getVersion().onOrAfter(Version.V_6_6_0)) {
-            ifSeqNo = in.readZLong();
-            ifPrimaryTerm = in.readVLong();
-        } else {
-            ifSeqNo = UNASSIGNED_SEQ_NO;
-            ifPrimaryTerm = UNASSIGNED_PRIMARY_TERM;
-        }
+    public void readFrom(StreamInput in) {
+        throw new UnsupportedOperationException("usage of Streamable is to be replaced by Writeable");
     }
 
     @Override
@@ -321,14 +331,4 @@ public void writeTo(StreamOutput out) throws IOException {
     public String toString() {
         return "delete {[" + index + "][" + type() + "][" + id + "]}";
     }
-
-    /**
-     * Override this method from ReplicationAction, this is where we are storing our state in the request object (which we really shouldn't
-     * do). Once the transport client goes away we can move away from making this available, but in the meantime this is dangerous to set or
-     * use because the DeleteRequest object will always be wrapped in a bulk request envelope, which is where this *should* be set.
-     */
-    @Override
-    public DeleteRequest setShardId(ShardId shardId) {
-        throw new UnsupportedOperationException("shard id should never be set on DeleteRequest");
-    }
 }