[Stable plugin api] Extensible annotation (#89903)

This commits adds an Extensible annotation aimed to mark things that can be loaded by a component loader.
It also marks Analyzer api components (AnalyzerFactory, CharFilterFactory, TokenFilterFactory and TokenizerFactory) with this annotation.

relates #88980

libs/logging/build.gradle

@@ -1,7 +1,3 @@
-import org.elasticsearch.gradle.transform.UnzipTransform
-
-import java.util.stream.Collectors
-
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License

libs/plugin-analysis-api/src/main/java/org/elasticsearch/plugin/analysis/api/AnalyzerFactory.java

@@ -9,11 +9,13 @@
 package org.elasticsearch.plugin.analysis.api;
 
 import org.apache.lucene.analysis.Analyzer;
+import org.elasticsearch.plugin.api.Extensible;
 import org.elasticsearch.plugin.api.Nameable;
 
 /**
  * An analysis component used to create Analyzers.
  */
+@Extensible
 public interface AnalyzerFactory extends Nameable {
     /**
      * Returns a lucene org.apache.lucene.analysis.Analyzer instance.

libs/plugin-analysis-api/src/main/java/org/elasticsearch/plugin/analysis/api/CharFilterFactory.java

@@ -8,6 +8,7 @@
 
 package org.elasticsearch.plugin.analysis.api;
 
+import org.elasticsearch.plugin.api.Extensible;
 import org.elasticsearch.plugin.api.Nameable;
 
 import java.io.Reader;
@@ -16,6 +17,7 @@ import java.io.Reader;
  * An analysis component used to create char filters.
  *
  */
+@Extensible
 public interface CharFilterFactory extends Nameable {
     /**
      * Wraps the given Reader with a CharFilter.

libs/plugin-analysis-api/src/main/java/org/elasticsearch/plugin/analysis/api/TokenFilterFactory.java

@@ -9,11 +9,13 @@
 package org.elasticsearch.plugin.analysis.api;
 
 import org.apache.lucene.analysis.TokenStream;
+import org.elasticsearch.plugin.api.Extensible;
 import org.elasticsearch.plugin.api.Nameable;
 
 /**
  * An analysis component used to create token filters.
  */
+@Extensible
 public interface TokenFilterFactory extends Nameable {
 
     /**

libs/plugin-analysis-api/src/main/java/org/elasticsearch/plugin/analysis/api/TokenizerFactory.java

@@ -9,11 +9,13 @@
 package org.elasticsearch.plugin.analysis.api;
 
 import org.apache.lucene.analysis.Tokenizer;
+import org.elasticsearch.plugin.api.Extensible;
 import org.elasticsearch.plugin.api.Nameable;
 
 /**
  * An analysis component used to create tokenizers.
  */
+@Extensible
 public interface TokenizerFactory extends Nameable {
 
     /**

libs/plugin-api/src/main/java/org/elasticsearch/plugin/api/Extensible.java

@@ -0,0 +1,24 @@
+/*
+ * 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 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.plugin.api;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.TYPE;
+
+/**
+ * Marker for things that can be loaded by component loader.
+ *
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(value = { TYPE })
+public @interface Extensible {
+}