[feature](compaction) Add a http action for visibility of compaction …

…score on each tablet

be/src/http/action/compaction_score_action.cpp

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+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+#include "http/action/compaction_score_action.h"
+
+#include <gen_cpp/Types_types.h>
+#include <rapidjson/document.h>
+#include <rapidjson/prettywriter.h>
+#include <rapidjson/stringbuffer.h>
+
+#include <cstdlib>
+#include <string>
+
+#include "http/http_channel.h"
+#include "http/http_headers.h"
+#include "http/http_request.h"
+#include "http/http_status.h"
+#include "olap/olap_common.h"
+#include "olap/tablet_fwd.h"
+#include "olap/tablet_manager.h"
+
+namespace doris {
+
+constexpr std::string TABLET_ID = "tablet_id";
+constexpr std::string BASE_COMPACTION_SCORE = "base_compaction_score";
+constexpr std::string CUMULATIVE_COMPACTION_SCORE = "cumu_compaction_score";
+
+static rapidjson::Document jsonfy_tablet_compaction_score(
+        const TabletSharedPtr& tablet, rapidjson::MemoryPoolAllocator<>& allocator) {
+    rapidjson::Document node;
+    node.SetObject();
+
+    rapidjson::Value tablet_id_key;
+    tablet_id_key.SetString(TABLET_ID.c_str(), TABLET_ID.length(), allocator);
+    rapidjson::Value tablet_id_val;
+    auto tablet_id_str = std::to_string(tablet->tablet_id());
+    tablet_id_val.SetString(tablet_id_str.c_str(), tablet_id_str.length(), allocator);
+
+    rapidjson::Value base_score_key;
+    base_score_key.SetString(BASE_COMPACTION_SCORE.c_str(), BASE_COMPACTION_SCORE.length(),
+                             allocator);
+    rapidjson::Value base_score_val;
+    tablet->calc_compaction_score(CompactionType::BASE_COMPACTION,
+                                  tablet->get_cumulative_compaction_policy());
+
+    rapidjson::Value cumu_score_key;
+    cumu_score_key.SetString(CUMULATIVE_COMPACTION_SCORE.c_str(),
+                             CUMULATIVE_COMPACTION_SCORE.length(), allocator);
+    rapidjson::Value cumu_score_val;
+    tablet->calc_compaction_score(CompactionType::CUMULATIVE_COMPACTION,
+                                  tablet->get_cumulative_compaction_policy());
+
+    node.AddMember(tablet_id_key, tablet_id_val, allocator);
+    node.AddMember(base_score_key, base_score_val, allocator);
+    node.AddMember(cumu_score_key, cumu_score_val, allocator);
+    return node;
+}
+
+void CompactionScoreAction::handle(HttpRequest* req) {
+    req->add_output_header(HttpHeaders::CONTENT_TYPE, HttpHeaders::JsonType.data());
+    auto tablet_id = req->param(TABLET_ID);
+    auto* tablet_mgr = _storage_engine->tablet_manager();
+    rapidjson::Document root;
+    if (tablet_id.empty()) {
+        // fetch comapction scores from all tablets
+        // [{tablet_id: xxx, base_compaction_score: xxx, cumu_compaction_score: xxx}, ...]
+        auto tablets = tablet_mgr->get_all_tablet();
+        root.SetArray();
+        auto& allocator = root.GetAllocator();
+        for (const auto& tablet : tablets) {
+            root.PushBack(jsonfy_tablet_compaction_score(tablet, allocator), allocator);
+        }
+    } else {
+        // {tablet_id: xxx, base_compaction_score: xxx, cumu_compaction_score: xxx}
+        auto tablet = tablet_mgr->get_tablet(std::atoll(tablet_id.c_str()));
+        root.SetObject();
+        root = jsonfy_tablet_compaction_score(tablet, root.GetAllocator());
+    }
+    rapidjson::StringBuffer str_buf;
+    rapidjson::PrettyWriter<rapidjson::StringBuffer> writer(str_buf);
+    root.Accept(writer);
+    HttpChannel::send_reply(req, HttpStatus::OK, str_buf.GetString());
+}
+
+} // namespace doris

be/src/http/action/compaction_score_action.h

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+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+#include "olap/storage_engine.h"
+#pragma once
+
+#include "http/http_handler_with_auth.h"
+namespace doris {
+
+class CompactionScoreAction : HttpHandlerWithAuth {
+public:
+    void handle(HttpRequest* req) override;
+
+private:
+    StorageEngine* _storage_engine;
+};
+
+} // namespace doris