[Rest Api Compatibility] Typed indexing stats

the per type indexing stats is simplified and when _types is requested
it will return total stats for the index repeated under types/_doc/

the removal elastic#47203

relates main meta issue elastic#51816
relates types removal issue elastic#54160

Author: pgomulka

rest-api-spec/build.gradle

@@ -65,6 +65,10 @@ def v7compatiblityNotSupportedTests = {
           'mget/16_basic_with_types/Basic multi-get',
           // asserting about type not found won't work as we ignore the type information
           'explain/40_mix_typeless_typeful/Explain with typeless API on an index that has types',
+          // translog settings removal is not supported under compatible api
+          'indices.stats/20_translog/Translog retention settings are deprecated',
+          'indices.stats/20_translog/Translog retention without soft_deletes',
+          'indices.stats/20_translog/Translog stats on closed indices without soft-deletes'
   ]
 }
 tasks.named("yamlRestCompatTest").configure {
@@ -86,16 +90,6 @@ tasks.named("yamlRestCompatTest").configure {
     'indices.put_template/11_basic_with_types/Put template with empty mappings',
     'indices.shrink/30_copy_settings/Copy settings during shrink index',
     'indices.split/30_copy_settings/Copy settings during split index',
-    'indices.stats/15_types/Types - _all metric',
-    'indices.stats/15_types/Types - indexing metric',
-    'indices.stats/15_types/Types - multi',
-    'indices.stats/15_types/Types - multi metric',
-    'indices.stats/15_types/Types - one',
-    'indices.stats/15_types/Types - pattern',
-    'indices.stats/15_types/Types - star',
-    'indices.stats/20_translog/Translog retention settings are deprecated',
-    'indices.stats/20_translog/Translog retention without soft_deletes',
-    'indices.stats/20_translog/Translog stats on closed indices without soft-deletes',
     'indices.upgrade/10_basic/Basic test for upgrade indices',
     'indices.upgrade/10_basic/Upgrade indices allow no indices',
     'indices.upgrade/10_basic/Upgrade indices disallow no indices',
@@ -236,6 +230,17 @@ tasks.named("transformV7RestTests").configure({ task ->
   task.replaceValueInMatch("docs.0._type", "_doc", "IDs")
   task.replaceValueInMatch("docs.1._type", "_doc", "IDs")
   task.replaceValueInMatch("docs.2._type", "_doc", "Routing")
+
+  //overrides for indices.stats
+  //TODO fix to remove the below match
+  task.replaceKeyInMatch("_all.primaries.indexing.types.baz.index_total",
+    "_all.primaries.indexing.types._doc.index_total"
+  )
+  task.replaceKeyInMatch("_all.primaries.indexing.types.bar.index_total",
+    "_all.primaries.indexing.types._doc.index_total"
+  )
+  task.replaceValueInMatch("_all.primaries.indexing.types._doc.index_total", 2)
+
 })
 
 tasks.register('enforceYamlTestConvention').configure {

server/src/main/java/org/elasticsearch/index/shard/IndexingStats.java

@@ -12,6 +12,7 @@
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Writeable;
+import org.elasticsearch.core.RestApiVersion;
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.ToXContentFragment;
@@ -214,12 +215,20 @@ public Stats getTotal() {
     public XContentBuilder toXContent(XContentBuilder builder, ToXContent.Params params) throws IOException {
         builder.startObject(Fields.INDEXING);
         totalStats.toXContent(builder, params);
+        if(builder.getRestApiVersion() == RestApiVersion.V_7 && params.param("types") != null){
+            builder.startObject(Fields.TYPES);
+            builder.startObject(MapperService.SINGLE_MAPPING_NAME);
+            totalStats.toXContent(builder, params);
+            builder.endObject();
+            builder.endObject();
+        }
         builder.endObject();
         return builder;
     }
 
     static final class Fields {
         static final String INDEXING = "indexing";
+        static final String TYPES = "types";
         static final String INDEX_TOTAL = "index_total";
         static final String INDEX_TIME = "index_time";
         static final String INDEX_TIME_IN_MILLIS = "index_time_in_millis";

server/src/main/java/org/elasticsearch/rest/action/admin/cluster/RestNodesStatsAction.java

@@ -13,6 +13,8 @@
 import org.elasticsearch.action.admin.indices.stats.CommonStatsFlags.Flag;
 import org.elasticsearch.client.node.NodeClient;
 import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.logging.DeprecationLogger;
+import org.elasticsearch.core.RestApiVersion;
 import org.elasticsearch.rest.BaseRestHandler;
 import org.elasticsearch.rest.RestRequest;
 import org.elasticsearch.rest.action.RestActions.NodesResponseRestListener;
@@ -31,6 +33,9 @@
 import static org.elasticsearch.rest.RestRequest.Method.GET;
 
 public class RestNodesStatsAction extends BaseRestHandler {
+    private DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(RestNodesStatsAction.class);
+    private static final String TYPES_DEPRECATION_MESSAGE =
+        "[types removal] " + "Specifying types in nodes stats requests is deprecated.";
 
     @Override
     public List<Route> routes() {
@@ -71,6 +76,11 @@ public String getName() {
 
     @Override
     public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
+        if(request.getRestApiVersion() == RestApiVersion.V_7 && request.hasParam("types")){
+            deprecationLogger.compatibleApiWarning("nodes_stats_types", TYPES_DEPRECATION_MESSAGE);
+            request.param("types");
+        }
+
         String[] nodesIds = Strings.splitStringByCommaToArray(request.param("nodeId"));
         Set<String> metrics = Strings.tokenizeByCommaToSet(request.param("metric", "_all"));
 

server/src/main/java/org/elasticsearch/rest/action/admin/indices/RestIndicesStatsAction.java

@@ -14,10 +14,13 @@
 import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.client.node.NodeClient;
 import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.logging.DeprecationLogger;
+import org.elasticsearch.core.RestApiVersion;
 import org.elasticsearch.rest.BaseRestHandler;
 import org.elasticsearch.rest.RestRequest;
 import org.elasticsearch.rest.action.RestCancellableNodeClient;
 import org.elasticsearch.rest.action.RestToXContentListener;
+import org.elasticsearch.rest.action.document.RestMultiTermVectorsAction;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -32,6 +35,9 @@
 import static org.elasticsearch.rest.RestRequest.Method.GET;
 
 public class RestIndicesStatsAction extends BaseRestHandler {
+    private DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(RestMultiTermVectorsAction.class);
+    private static final String TYPES_DEPRECATION_MESSAGE =
+        "[types removal] " + "Specifying types in indices stats requests is deprecated.";
 
     @Override
     public List<Route> routes() {
@@ -64,6 +70,11 @@ public boolean allowSystemIndexAccessByDefault() {
 
     @Override
     public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
+        if(request.getRestApiVersion() == RestApiVersion.V_7 && request.hasParam("types")){
+            deprecationLogger.compatibleApiWarning("indices_stats_types", TYPES_DEPRECATION_MESSAGE);
+            request.param("types");
+        }
+
         IndicesStatsRequest indicesStatsRequest = new IndicesStatsRequest();
         boolean forbidClosedIndices = request.paramAsBoolean("forbid_closed_indices", true);
         IndicesOptions defaultIndicesOption = forbidClosedIndices ? indicesStatsRequest.indicesOptions()

server/src/main/java/org/elasticsearch/rest/action/document/RestMultiTermVectorsAction.java

@@ -26,7 +26,7 @@
 import static org.elasticsearch.rest.RestRequest.Method.POST;
 
 public class RestMultiTermVectorsAction extends BaseRestHandler {
-    DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(RestMultiTermVectorsAction.class);
+    private DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(RestMultiTermVectorsAction.class);
     static final String TYPES_DEPRECATION_MESSAGE = "[types removal] " + "Specifying types in multi term vector requests is deprecated.";
 
     @Override