Make counted terms agg visible to profiling (elastic#105049)

The counted-terms aggregation is defined in its own plugin. When other
plugins (such as the profiling plugin) want to use this aggregation,
this leads to class loader issues, such as that the aggregation class is
not recognized. By moving just the aggregation code itself to the server
module but keeping everything else (including registration) in the
`mapper-counted-keyword` module, we can use the counted-terms
aggregation also from other plugins.

server/src/main/java/module-info.java

@@ -325,6 +325,7 @@
     exports org.elasticsearch.search.aggregations;
     exports org.elasticsearch.search.aggregations.bucket;
     exports org.elasticsearch.search.aggregations.bucket.composite;
+    exports org.elasticsearch.search.aggregations.bucket.countedterms;
     exports org.elasticsearch.search.aggregations.bucket.filter;
     exports org.elasticsearch.search.aggregations.bucket.geogrid;
     exports org.elasticsearch.search.aggregations.bucket.global;

x-pack/plugin/mapper-counted-keyword/src/main/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregationBuilder.java → server/src/main/java/org/elasticsearch/search/aggregations/bucket/countedterms/CountedTermsAggregationBuilder.java

@@ -1,11 +1,12 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
-package org.elasticsearch.xpack.countedkeyword;
+package org.elasticsearch.search.aggregations.bucket.countedterms;
 
 import org.elasticsearch.TransportVersion;
 import org.elasticsearch.TransportVersions;
@@ -56,15 +57,15 @@ public CountedTermsAggregationBuilder(String name) {
         super(name);
     }
 
-    protected CountedTermsAggregationBuilder(
+    public CountedTermsAggregationBuilder(
         ValuesSourceAggregationBuilder<CountedTermsAggregationBuilder> clone,
         AggregatorFactories.Builder factoriesBuilder,
         Map<String, Object> metadata
     ) {
         super(clone, factoriesBuilder, metadata);
     }
 
-    protected CountedTermsAggregationBuilder(StreamInput in) throws IOException {
+    public CountedTermsAggregationBuilder(StreamInput in) throws IOException {
         super(in);
         bucketCountThresholds = new TermsAggregator.BucketCountThresholds(in);
     }

x-pack/plugin/mapper-counted-keyword/src/main/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregator.java → server/src/main/java/org/elasticsearch/search/aggregations/bucket/countedterms/CountedTermsAggregator.java

@@ -1,11 +1,12 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
-package org.elasticsearch.xpack.countedkeyword;
+package org.elasticsearch.search.aggregations.bucket.countedterms;
 
 import org.apache.lucene.index.SortedSetDocValues;
 import org.apache.lucene.util.BytesRef;

x-pack/plugin/mapper-counted-keyword/src/main/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregatorFactory.java → server/src/main/java/org/elasticsearch/search/aggregations/bucket/countedterms/CountedTermsAggregatorFactory.java

@@ -1,11 +1,12 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
-package org.elasticsearch.xpack.countedkeyword;
+package org.elasticsearch.search.aggregations.bucket.countedterms;
 
 import org.elasticsearch.ElasticsearchStatusException;
 import org.elasticsearch.rest.RestStatus;

x-pack/plugin/mapper-counted-keyword/src/main/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregatorSupplier.java → server/src/main/java/org/elasticsearch/search/aggregations/bucket/countedterms/CountedTermsAggregatorSupplier.java

@@ -1,11 +1,12 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
-package org.elasticsearch.xpack.countedkeyword;
+package org.elasticsearch.search.aggregations.bucket.countedterms;
 
 import org.elasticsearch.search.aggregations.Aggregator;
 import org.elasticsearch.search.aggregations.AggregatorFactories;

x-pack/plugin/mapper-counted-keyword/src/main/java/org/elasticsearch/xpack/countedkeyword/CountedKeywordMapperPlugin.java

@@ -11,6 +11,7 @@
 import org.elasticsearch.plugins.MapperPlugin;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.plugins.SearchPlugin;
+import org.elasticsearch.search.aggregations.bucket.countedterms.CountedTermsAggregationBuilder;
 
 import java.util.ArrayList;
 import java.util.Collections;

x-pack/plugin/mapper-counted-keyword/src/test/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregationBuilderTests.java

@@ -9,6 +9,7 @@
 
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.search.aggregations.BaseAggregationTestCase;
+import org.elasticsearch.search.aggregations.bucket.countedterms.CountedTermsAggregationBuilder;
 
 import java.util.Collection;
 import java.util.Collections;

x-pack/plugin/mapper-counted-keyword/src/test/java/org/elasticsearch/xpack/countedkeyword/CountedTermsAggregatorTests.java

@@ -18,6 +18,7 @@
 import org.elasticsearch.index.mapper.TestDocumentParserContext;
 import org.elasticsearch.plugins.SearchPlugin;
 import org.elasticsearch.search.aggregations.AggregatorTestCase;
+import org.elasticsearch.search.aggregations.bucket.countedterms.CountedTermsAggregationBuilder;
 import org.elasticsearch.search.aggregations.bucket.terms.InternalTerms;
 import org.elasticsearch.search.aggregations.support.AggregationInspectionHelper;
 import org.elasticsearch.xcontent.XContentParser;

x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/TransportGetStackTracesAction.java

@@ -31,6 +31,7 @@
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.search.SearchHit;
+import org.elasticsearch.search.aggregations.bucket.countedterms.CountedTermsAggregationBuilder;
 import org.elasticsearch.search.aggregations.bucket.terms.StringTerms;
 import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
 import org.elasticsearch.search.aggregations.metrics.InternalNumericMetricsAggregation;
@@ -47,7 +48,6 @@
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 import org.elasticsearch.xcontent.ObjectPath;
-import org.elasticsearch.xpack.countedkeyword.CountedTermsAggregationBuilder;
 
 import java.time.Duration;
 import java.time.Instant;