Fix compiler warnings in :server - part 1 (#75708)

Part of #40366. Fix a number of javac issues when linting is enforced in `server/`.
elastic · Jul 27, 2021 · 84346d9 · 84346d9
1 parent 348bd92
commit 84346d9
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Showing 86 changed files with 295 additions and 163 deletions.
diff --git a/server/src/main/java/org/elasticsearch/action/DocWriteRequest.java b/server/src/main/java/org/elasticsearch/action/DocWriteRequest.java
@@ -271,7 +271,7 @@ static void writeDocumentRequestThin(StreamOutput out, DocWriteRequest<?> reques
     }
 
     static ActionRequestValidationException validateSeqNoBasedCASParams(
-        DocWriteRequest request, ActionRequestValidationException validationException) {
+        DocWriteRequest<?> request, ActionRequestValidationException validationException) {
         final long version = request.version();
         final VersionType versionType = request.versionType();
         if (versionType.validateVersionForWrites(version) == false) {

diff --git a/...ain/java/org/elasticsearch/action/admin/indices/mapping/put/PutMappingRequestBuilder.java b/...ain/java/org/elasticsearch/action/admin/indices/mapping/put/PutMappingRequestBuilder.java
@@ -67,7 +67,7 @@ public PutMappingRequestBuilder setSource(XContentBuilder mappingBuilder) {
     /**
      * The mapping source definition.
      */
-    public PutMappingRequestBuilder setSource(Map mappingSource) {
+    public PutMappingRequestBuilder setSource(Map<String, ?> mappingSource) {
         request.source(mappingSource);
         return this;
     }

diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/RolloverRequest.java b/server/src/main/java/org/elasticsearch/action/admin/indices/rollover/RolloverRequest.java
@@ -72,7 +72,9 @@ public class RolloverRequest extends AcknowledgedRequest<RolloverRequest> implem
         PARSER.declareField((parser, request, includeTypeName) -> {
             if (includeTypeName) {
                 for (Map.Entry<String, Object> mappingsEntry : parser.map().entrySet()) {
-                    request.createIndexRequest.mapping(mappingsEntry.getKey(), (Map<String, Object>) mappingsEntry.getValue());
+                    @SuppressWarnings("unchecked")
+                    final Map<String, Object> value = (Map<String, Object>) mappingsEntry.getValue();
+                    request.createIndexRequest.mapping(mappingsEntry.getKey(), value);
                 }
             } else {
                 // a type is not included, add a dummy _doc type

diff --git a/server/src/main/java/org/elasticsearch/action/bulk/BulkItemResponse.java b/server/src/main/java/org/elasticsearch/action/bulk/BulkItemResponse.java
@@ -466,6 +466,7 @@ public long getVersion() {
      * The actual response ({@link IndexResponse} or {@link DeleteResponse}). {@code null} in
      * case of failure.
      */
+    @SuppressWarnings("unchecked")
     public <T extends DocWriteResponse> T getResponse() {
         return (T) response;
     }

diff --git a/server/src/main/java/org/elasticsearch/action/get/GetRequest.java b/server/src/main/java/org/elasticsearch/action/get/GetRequest.java
@@ -37,6 +37,8 @@
  * @see org.elasticsearch.client.Requests#getRequest(String)
  * @see org.elasticsearch.client.Client#get(GetRequest)
  */
+// It's not possible to suppress teh warning at #realtime(boolean) at a method-level.
+@SuppressWarnings("unchecked")
 public class GetRequest extends SingleShardRequest<GetRequest> implements RealtimeRequest {
 
     private String type;

diff --git a/server/src/main/java/org/elasticsearch/action/get/MultiGetRequest.java b/server/src/main/java/org/elasticsearch/action/get/MultiGetRequest.java
@@ -40,6 +40,8 @@
 import java.util.List;
 import java.util.Locale;
 
+// It's not possible to suppress teh warning at #realtime(boolean) at a method-level.
+@SuppressWarnings("unchecked")
 public class MultiGetRequest extends ActionRequest
         implements Iterable<MultiGetRequest.Item>, CompositeIndicesRequest, RealtimeRequest, ToXContentObject {
 

diff --git a/server/src/main/java/org/elasticsearch/action/ingest/SimulatePipelineRequest.java b/server/src/main/java/org/elasticsearch/action/ingest/SimulatePipelineRequest.java
@@ -168,6 +168,7 @@ private static List<IngestDocument> parseDocs(Map<String, Object> config) {
             if ((object instanceof Map) ==  false) {
                 throw new IllegalArgumentException("malformed [docs] section, should include an inner object");
             }
+            @SuppressWarnings("unchecked")
             Map<String, Object> dataMap = (Map<String, Object>) object;
             Map<String, Object> document = ConfigurationUtils.readMap(null, null,
                 dataMap, Fields.SOURCE);

diff --git a/server/src/main/java/org/elasticsearch/action/resync/TransportResyncReplicationAction.java b/server/src/main/java/org/elasticsearch/action/resync/TransportResyncReplicationAction.java
@@ -66,7 +66,7 @@ protected ResyncReplicationResponse newResponseInstance(StreamInput in) throws I
     }
 
     @Override
-    protected ReplicationOperation.Replicas newReplicasProxy() {
+    protected ReplicationOperation.Replicas<ResyncReplicationRequest> newReplicasProxy() {
         return new ResyncActionReplicasProxy();
     }
 

diff --git a/server/src/main/java/org/elasticsearch/action/search/MultiSearchResponse.java b/server/src/main/java/org/elasticsearch/action/search/MultiSearchResponse.java
@@ -39,6 +39,7 @@ public class MultiSearchResponse extends ActionResponse implements Iterable<Mult
 
     private static final ParseField RESPONSES = new ParseField(Fields.RESPONSES);
     private static final ParseField TOOK_IN_MILLIS = new ParseField("took");
+    @SuppressWarnings("unchecked")
     private static final ConstructingObjectParser<MultiSearchResponse, Void> PARSER = new ConstructingObjectParser<>("multi_search",
             true, a -> new MultiSearchResponse(((List<Item>)a[0]).toArray(new Item[0]), (long) a[1]));
     static {

diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchExecutionStatsCollector.java b/server/src/main/java/org/elasticsearch/action/search/SearchExecutionStatsCollector.java
@@ -37,8 +37,15 @@ public final class SearchExecutionStatsCollector extends ActionListener.Delegati
         this.nodeId = nodeId;
     }
 
-    public static BiFunction<Transport.Connection, SearchActionListener, ActionListener> makeWrapper(ResponseCollectorService service) {
-        return (connection, originalListener) -> new SearchExecutionStatsCollector(originalListener, service, connection.getNode().getId());
+    @SuppressWarnings("unchecked")
+    public static
+        BiFunction<Transport.Connection, SearchActionListener<? super SearchPhaseResult>, ActionListener<? super SearchPhaseResult>>
+        makeWrapper(ResponseCollectorService service) {
+        return (connection, originalListener) -> new SearchExecutionStatsCollector(
+            (ActionListener<SearchPhaseResult>) originalListener,
+            service,
+            connection.getNode().getId()
+        );
     }
 
     @Override

diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java b/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java
@@ -422,7 +422,7 @@ ReducedQueryPhase reducedQueryPhase(Collection<? extends SearchPhaseResult> quer
         final boolean hasProfileResults =  queryResults.stream().anyMatch(res -> res.queryResult().hasProfileResults());
 
         // count the total (we use the query result provider here, since we might not get any hits (we scrolled past them))
-        final Map<String, List<Suggestion>> groupedSuggestions = hasSuggest ? new HashMap<>() : Collections.emptyMap();
+        final Map<String, List<Suggestion<?>>> groupedSuggestions = hasSuggest ? new HashMap<>() : Collections.emptyMap();
         final Map<String, ProfileShardResult> profileResults = hasProfileResults ? new HashMap<>(queryResults.size())
             : Collections.emptyMap();
         int from = 0;
@@ -440,7 +440,7 @@ ReducedQueryPhase reducedQueryPhase(Collection<? extends SearchPhaseResult> quer
             if (hasSuggest) {
                 assert result.suggest() != null;
                 for (Suggestion<? extends Suggestion.Entry<? extends Suggestion.Entry.Option>> suggestion : result.suggest()) {
-                    List<Suggestion> suggestionList = groupedSuggestions.computeIfAbsent(suggestion.getName(), s -> new ArrayList<>());
+                    List<Suggestion<?>> suggestionList = groupedSuggestions.computeIfAbsent(suggestion.getName(), s -> new ArrayList<>());
                     suggestionList.add(suggestion);
                     if (suggestion instanceof CompletionSuggestion) {
                         CompletionSuggestion completionSuggestion = (CompletionSuggestion) suggestion;

diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchRequestBuilder.java b/server/src/main/java/org/elasticsearch/action/search/SearchRequestBuilder.java
@@ -465,7 +465,7 @@ public SearchRequestBuilder setRescorer(RescorerBuilder<?> rescorer) {
      * @param window   rescore window
      * @return this for chaining
      */
-    public SearchRequestBuilder setRescorer(RescorerBuilder rescorer, int window) {
+    public SearchRequestBuilder setRescorer(RescorerBuilder<?> rescorer, int window) {
         sourceBuilder().clearRescorers();
         return addRescorer(rescorer.windowSize(window));
     }

diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchResponseMerger.java b/server/src/main/java/org/elasticsearch/action/search/SearchResponseMerger.java
@@ -115,7 +115,7 @@ SearchResponse getMergedResponse(Clusters clusters) {
         List<InternalAggregations> aggs = new ArrayList<>();
         Map<ShardIdAndClusterAlias, Integer> shards = new TreeMap<>();
         List<TopDocs> topDocsList = new ArrayList<>(searchResponses.size());
-        Map<String, List<Suggest.Suggestion>> groupedSuggestions = new HashMap<>();
+        Map<String, List<Suggest.Suggestion<?>>> groupedSuggestions = new HashMap<>();
         Boolean trackTotalHits = null;
 
         TopDocsStats topDocsStats = new TopDocsStats(trackTotalHitsUpTo);
@@ -138,7 +138,8 @@ SearchResponse getMergedResponse(Clusters clusters) {
             Suggest suggest = searchResponse.getSuggest();
             if (suggest != null) {
                 for (Suggest.Suggestion<? extends Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option>> entries : suggest) {
-                    List<Suggest.Suggestion> suggestionList = groupedSuggestions.computeIfAbsent(entries.getName(), s -> new ArrayList<>());
+                    List<Suggest.Suggestion<?>> suggestionList =
+                        groupedSuggestions.computeIfAbsent(entries.getName(), s -> new ArrayList<>());
                     suggestionList.add(entries);
                 }
                 List<CompletionSuggestion> completionSuggestions = suggest.filter(CompletionSuggestion.class);
@@ -297,10 +298,10 @@ private static void setTopDocsShardIndex(Map<ShardIdAndClusterAlias, Integer> sh
     }
 
     private static void setSuggestShardIndex(Map<ShardIdAndClusterAlias, Integer> shards,
-                                             Map<String, List<Suggest.Suggestion>> groupedSuggestions) {
+                                             Map<String, List<Suggest.Suggestion<?>>> groupedSuggestions) {
         assignShardIndex(shards);
-        for (List<Suggest.Suggestion> suggestions : groupedSuggestions.values()) {
-            for (Suggest.Suggestion suggestion : suggestions) {
+        for (List<Suggest.Suggestion<?>> suggestions : groupedSuggestions.values()) {
+            for (Suggest.Suggestion<?> suggestion : suggestions) {
                 if (suggestion instanceof CompletionSuggestion) {
                     CompletionSuggestion completionSuggestion = (CompletionSuggestion) suggestion;
                     for (CompletionSuggestion.Entry options : completionSuggestion) {

diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchTransportService.java b/server/src/main/java/org/elasticsearch/action/search/SearchTransportService.java
@@ -76,11 +76,20 @@ public class SearchTransportService {
 
     private final TransportService transportService;
     private final NodeClient client;
-    private final BiFunction<Transport.Connection, SearchActionListener, ActionListener> responseWrapper;
+    private final BiFunction<
+        Transport.Connection,
+        SearchActionListener<? super SearchPhaseResult>,
+        ActionListener<? super SearchPhaseResult>> responseWrapper;
     private final Map<String, Long> clientConnections = ConcurrentCollections.newConcurrentMapWithAggressiveConcurrency();
 
-    public SearchTransportService(TransportService transportService, NodeClient client,
-                                  BiFunction<Transport.Connection, SearchActionListener, ActionListener> responseWrapper) {
+    public SearchTransportService(
+        TransportService transportService,
+        NodeClient client,
+        BiFunction<
+            Transport.Connection,
+            SearchActionListener<? super SearchPhaseResult>,
+            ActionListener<? super SearchPhaseResult>> responseWrapper
+    ) {
         this.transportService = transportService;
         this.client = client;
         this.responseWrapper = responseWrapper;
@@ -125,13 +134,13 @@ public void sendExecuteDfs(Transport.Connection connection, final ShardSearchReq
     }
 
     public void sendExecuteQuery(Transport.Connection connection, final ShardSearchRequest request, SearchTask task,
-                                 final SearchActionListener<SearchPhaseResult> listener) {
+                                 final SearchActionListener<? super SearchPhaseResult> listener) {
         // we optimize this and expect a QueryFetchSearchResult if we only have a single shard in the search request
         // this used to be the QUERY_AND_FETCH which doesn't exist anymore.
         final boolean fetchDocuments = request.numberOfShards() == 1;
         Writeable.Reader<SearchPhaseResult> reader = fetchDocuments ? QueryFetchSearchResult::new : QuerySearchResult::new;
 
-        final ActionListener handler = responseWrapper.apply(connection, listener);
+        final ActionListener<? super SearchPhaseResult> handler = responseWrapper.apply(connection, listener);
         transportService.sendChildRequest(connection, QUERY_ACTION_NAME, request, task,
                 new ConnectionCountingHandler<>(handler, reader, clientConnections, connection.getNode().getId()));
     }

diff --git a/server/src/main/java/org/elasticsearch/action/support/ListenableActionFuture.java b/server/src/main/java/org/elasticsearch/action/support/ListenableActionFuture.java
@@ -26,7 +26,7 @@ public class ListenableActionFuture<T> extends AdapterActionFuture<T, T> {
      * Registers an {@link ActionListener} to be notified when this future is completed. If the future is already completed then the
      * listener is notified immediately, on the calling thread. If not, the listener is notified on the thread that completes the listener.
      */
-    @SuppressWarnings("unchecked,rawtypes")
+    @SuppressWarnings({"unchecked", "rawtypes"})
     public void addListener(final ActionListener<T> listener) {
         final boolean executeImmediate;
         synchronized (this) {
@@ -56,7 +56,7 @@ public void addListener(final ActionListener<T> listener) {
     }
 
     @Override
-    @SuppressWarnings("unchecked,rawtypes")
+    @SuppressWarnings({"unchecked", "rawtypes"})
     protected void done(boolean success) {
         super.done(success);
         final Object listenersToExecute;

diff --git a/...er/src/main/java/org/elasticsearch/action/support/nodes/NodesOperationRequestBuilder.java b/...er/src/main/java/org/elasticsearch/action/support/nodes/NodesOperationRequestBuilder.java
@@ -13,7 +13,7 @@
 import org.elasticsearch.client.ElasticsearchClient;
 import org.elasticsearch.core.TimeValue;
 
-public abstract class NodesOperationRequestBuilder<Request extends BaseNodesRequest<Request>, Response extends BaseNodesResponse,
+public abstract class NodesOperationRequestBuilder<Request extends BaseNodesRequest<Request>, Response extends BaseNodesResponse<?>,
         RequestBuilder extends NodesOperationRequestBuilder<Request, Response, RequestBuilder>>
         extends ActionRequestBuilder<Request, Response> {
 

diff --git a/server/src/main/java/org/elasticsearch/action/support/nodes/TransportNodesAction.java b/server/src/main/java/org/elasticsearch/action/support/nodes/TransportNodesAction.java
@@ -38,7 +38,7 @@
 import java.util.concurrent.atomic.AtomicReferenceArray;
 
 public abstract class TransportNodesAction<NodesRequest extends BaseNodesRequest<NodesRequest>,
-                                           NodesResponse extends BaseNodesResponse,
+                                           NodesResponse extends BaseNodesResponse<?>,
                                            NodeRequest extends BaseNodeRequest,
                                            NodeResponse extends BaseNodeResponse>
     extends HandledTransportAction<NodesRequest, NodesResponse> {

diff --git a/server/src/main/java/org/elasticsearch/action/termvectors/MultiTermVectorsRequest.java b/server/src/main/java/org/elasticsearch/action/termvectors/MultiTermVectorsRequest.java
@@ -28,6 +28,8 @@
 import java.util.List;
 import java.util.Set;
 
+// It's not possible to suppress teh warning at #realtime(boolean) at a method-level.
+@SuppressWarnings("unchecked")
 public class MultiTermVectorsRequest extends ActionRequest
         implements Iterable<TermVectorsRequest>, CompositeIndicesRequest, RealtimeRequest {
 

diff --git a/server/src/main/java/org/elasticsearch/action/termvectors/TermVectorsRequest.java b/server/src/main/java/org/elasticsearch/action/termvectors/TermVectorsRequest.java
@@ -51,6 +51,8 @@
  * Note, the {@link #index()}, {@link #type(String)} and {@link #id(String)} are
  * required.
  */
+// It's not possible to suppress teh warning at #realtime(boolean) at a method-level.
+@SuppressWarnings("unchecked")
 public class TermVectorsRequest extends SingleShardRequest<TermVectorsRequest> implements RealtimeRequest {
     private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(TermVectorsRequest.class);
 

diff --git a/server/src/main/java/org/elasticsearch/bootstrap/ESPolicy.java b/server/src/main/java/org/elasticsearch/bootstrap/ESPolicy.java
@@ -104,6 +104,7 @@ public boolean implies(ProtectionDomain domain, Permission permission) {
      * Classy puzzler to rethrow any checked exception as an unchecked one.
      */
     private static class Rethrower<T extends Throwable> {
+        @SuppressWarnings("unchecked")
         private void rethrow(Throwable t) throws T {
             throw (T) t;
         }

diff --git a/server/src/main/java/org/elasticsearch/bootstrap/SystemCallFilter.java b/server/src/main/java/org/elasticsearch/bootstrap/SystemCallFilter.java
@@ -105,7 +105,7 @@ interface LinuxLibrary extends Library {
         LinuxLibrary lib = null;
         if (Constants.LINUX) {
             try {
-                lib = (LinuxLibrary) Native.loadLibrary("c", LinuxLibrary.class);
+                lib = Native.loadLibrary("c", LinuxLibrary.class);
             } catch (UnsatisfiedLinkError e) {
                 logger.warn("unable to link C library. native methods (seccomp) will be disabled.", e);
             }
@@ -424,7 +424,7 @@ interface MacLibrary extends Library {
         MacLibrary lib = null;
         if (Constants.MAC_OS_X) {
             try {
-                lib = (MacLibrary) Native.loadLibrary("c", MacLibrary.class);
+                lib = Native.loadLibrary("c", MacLibrary.class);
             } catch (UnsatisfiedLinkError e) {
                 logger.warn("unable to link C library. native methods (seatbelt) will be disabled.", e);
             }
@@ -493,7 +493,7 @@ interface SolarisLibrary extends Library {
         SolarisLibrary lib = null;
         if (Constants.SUN_OS) {
             try {
-                lib = (SolarisLibrary) Native.loadLibrary("c", SolarisLibrary.class);
+                lib = Native.loadLibrary("c", SolarisLibrary.class);
             } catch (UnsatisfiedLinkError e) {
                 logger.warn("unable to link C library. native methods (priv_set) will be disabled.", e);
             }

diff --git a/server/src/main/java/org/elasticsearch/client/node/NodeClient.java b/server/src/main/java/org/elasticsearch/client/node/NodeClient.java
@@ -32,7 +32,7 @@
  */
 public class NodeClient extends AbstractClient {
 
-    private Map<ActionType, TransportAction> actions;
+    private Map<ActionType<? extends ActionResponse>, TransportAction<? extends ActionRequest, ? extends ActionResponse>> actions;
     /**
      * The id of the local {@link DiscoveryNode}. Useful for generating task ids from tasks returned by
      * {@link #executeLocally(ActionType, ActionRequest, TaskListener)}.
@@ -45,8 +45,12 @@ public NodeClient(Settings settings, ThreadPool threadPool) {
         super(settings, threadPool);
     }
 
-    public void initialize(Map<ActionType, TransportAction> actions, Supplier<String> localNodeId,
-                           RemoteClusterService remoteClusterService, NamedWriteableRegistry namedWriteableRegistry) {
+    public void initialize(
+        Map<ActionType<? extends ActionResponse>, TransportAction<? extends ActionRequest, ? extends ActionResponse>> actions,
+        Supplier<String> localNodeId,
+        RemoteClusterService remoteClusterService,
+        NamedWriteableRegistry namedWriteableRegistry
+    ) {
         this.actions = actions;
         this.localNodeId = localNodeId;
         this.remoteClusterService = remoteClusterService;
@@ -109,14 +113,14 @@ public String getLocalNodeId() {
     /**
      * Get the {@link TransportAction} for an {@link ActionType}, throwing exceptions if the action isn't available.
      */
-    @SuppressWarnings("unchecked")
     private <    Request extends ActionRequest,
                 Response extends ActionResponse
             > TransportAction<Request, Response> transportAction(ActionType<Response> action) {
         if (actions == null) {
             throw new IllegalStateException("NodeClient has not been initialized");
         }
-        TransportAction<Request, Response> transportAction = actions.get(action);
+        @SuppressWarnings("unchecked")
+        TransportAction<Request, Response> transportAction = (TransportAction<Request, Response>) actions.get(action);
         if (transportAction == null) {
             throw new IllegalStateException("failed to find action [" + action + "] to execute");
         }