docs: Add documentation module

Add module to generate config documentation

docs/build.gradle

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2024 Aiven Oy
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+plugins {
+    id 'java-library'
+}
+
+dependencies {
+    implementation "org.apache.kafka:kafka-clients:$kafkaVersion"
+    implementation project(":core")
+}
+
+tasks.register('genConfigDocs', JavaExec) {
+    classpath = sourceSets.main.runtimeClasspath
+    mainClass = 'io.aiven.kafka.tieredstorage.misc.ConfigDocs'
+    standardOutput = new File("config.rst").newOutputStream()
+}

docs/src/main/java/io/aiven/kafka/tieredstorage/misc/ConfigDocs.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2024 Aiven Oy
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.aiven.kafka.tieredstorage.misc;
+
+import org.apache.kafka.common.config.ConfigDef;
+
+import io.aiven.kafka.tieredstorage.config.ChunkCacheConfig;
+import io.aiven.kafka.tieredstorage.config.ChunkManagerFactoryConfig;
+import io.aiven.kafka.tieredstorage.config.DiskChunkCacheConfig;
+import io.aiven.kafka.tieredstorage.config.RemoteStorageManagerConfig;
+import io.aiven.kafka.tieredstorage.fetch.index.MemorySegmentIndexesCache;
+import io.aiven.kafka.tieredstorage.fetch.manifest.MemorySegmentManifestCache;
+
+public class ConfigDocs {
+    public static void main(final String[] args) {
+        System.out.println("=================\n"
+            + "RemoteStorageManagerConfig\n"
+            + "=================");
+        final var rsmConfigDef = RemoteStorageManagerConfig.configDef();
+        System.out.println(rsmConfigDef.toEnrichedRst());
+
+        System.out.println("=================\n"
+            + "SegmentManifestCacheConfig\n"
+            + "=================");
+        System.out.println("Under ``" + RemoteStorageManagerConfig.SEGMENT_MANIFEST_CACHE_PREFIX + "``\n");
+        final var segmentManifestCacheDef = MemorySegmentManifestCache.configDef();
+        System.out.println(segmentManifestCacheDef.toEnrichedRst());
+
+        System.out.println("=================\n"
+            + "SegmentIndexesCacheConfig\n"
+            + "=================");
+        System.out.println("Under ``" + RemoteStorageManagerConfig.FETCH_INDEXES_CACHE_PREFIX + "``\n");
+        final var segmentIndexesCacheDef = MemorySegmentIndexesCache.configDef();
+        System.out.println(segmentIndexesCacheDef.toEnrichedRst());
+
+        System.out.println("=================\n"
+            + "ChunkManagerFactoryConfig\n"
+            + "=================");
+        final var chunkCacheFactoryDef = ChunkManagerFactoryConfig.configDef();
+        System.out.println(chunkCacheFactoryDef.toEnrichedRst());
+
+        System.out.println("=================\n"
+            + "MemoryChunkCacheConfig\n"
+            + "=================");
+        System.out.println("Under ``" + ChunkManagerFactoryConfig.FETCH_CHUNK_CACHE_PREFIX + "``\n");
+        final var memChunkCacheDef = ChunkCacheConfig.configDef(new ConfigDef());
+        System.out.println(memChunkCacheDef.toEnrichedRst());
+
+        System.out.println("=================\n"
+            + "DiskChunkCacheConfig\n"
+            + "=================");
+        System.out.println("Under ``" + ChunkManagerFactoryConfig.FETCH_CHUNK_CACHE_PREFIX + "``\n");
+        final var diskChunkCacheDef = DiskChunkCacheConfig.configDef();
+        System.out.println(diskChunkCacheDef.toEnrichedRst());
+    }
+}

settings.gradle

@@ -24,3 +24,5 @@ include 'storage:gcs'
 include 'storage:s3'
 include 'e2e'
 include 'commons'
+include 'docs'
+