// 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.

#pragma once

#include "jni.h"

#include "util/jni-util.h"

#include "util/metrics.h"

namespace doris {

class JvmMetrics;

class JvmStats {

private:

    jclass _managementFactoryClass = nullptr;

    jmethodID _getMemoryMXBeanMethod = nullptr;

    jclass _memoryUsageClass = nullptr;

    jclass _memoryMXBeanClass = nullptr;

    jmethodID _getHeapMemoryUsageMethod = nullptr;

    jmethodID _getNonHeapMemoryUsageMethod = nullptr;

    jmethodID _getMemoryUsageUsedMethod = nullptr;

    jmethodID _getMemoryUsageCommittedMethod = nullptr;

    jmethodID _getMemoryUsageMaxMethod = nullptr;

    jmethodID _getMemoryPoolMXBeansMethod = nullptr;

    jclass _listClass = nullptr;

    jmethodID _getListSizeMethod = nullptr;

    jmethodID _getListUseIndexMethod = nullptr;

    jclass _memoryPoolMXBeanClass = nullptr;

    jmethodID _getMemoryPoolMXBeanUsageMethod = nullptr;

    jmethodID _getMemoryPollMXBeanPeakMethod = nullptr;

    jmethodID _getMemoryPollMXBeanNameMethod = nullptr;

    enum memoryPoolNameEnum { YOUNG, SURVIVOR, OLD };

    const std::map<std::string, memoryPoolNameEnum> _memoryPoolName = {

            {"Eden Space", YOUNG},

            {"PS Eden Space", YOUNG},

            {"Par Eden Space", YOUNG},

            {"G1 Eden Space", YOUNG},

            {"Survivor Space", SURVIVOR},

            {"PS Survivor Space", SURVIVOR},

            {"Par Survivor Space", SURVIVOR},

            {"G1 Survivor Space", SURVIVOR},

            {"Tenured Gen", OLD},

            {"PS Old Gen", OLD},

            {"CMS Old Gen", OLD},

            {"G1 Old Gen", OLD},

    };

    jmethodID _getThreadMXBeanMethod = nullptr;

    jclass _threadMXBeanClass = nullptr;

    jmethodID _getAllThreadIdsMethod = nullptr;

    jmethodID _getThreadInfoMethod = nullptr;

    jclass _threadInfoClass = nullptr;

    jmethodID _getPeakThreadCountMethod = nullptr;

    jmethodID _getThreadStateMethod = nullptr;

    jclass _threadStateClass = nullptr;

    jobject _newThreadStateObj = nullptr;

    jobject _runnableThreadStateObj = nullptr;

    jobject _blockedThreadStateObj = nullptr;

    jobject _waitingThreadStateObj = nullptr;

    jobject _timedWaitingThreadStateObj = nullptr;

    jobject _terminatedThreadStateObj = nullptr;

    jclass _garbageCollectorMXBeanClass = nullptr;

    jmethodID _getGCNameMethod = nullptr;

    jmethodID _getGarbageCollectorMXBeansMethod = nullptr;

    jmethodID _getGCCollectionCountMethod = nullptr;

    jmethodID _getGCCollectionTimeMethod = nullptr;

    bool _init_complete = false;

public:

    Status init(JNIEnv* env);

    bool init_complete() const { return _init_complete; }

    void set_complete(bool val) { _init_complete = val; }

    Status refresh(JvmMetrics* jvm_metrics) const;

    ~JvmStats();

};

class JvmMetrics {

public:

    JvmMetrics(MetricRegistry* registry, JNIEnv* env);

    ~JvmMetrics() = default;

    void update();

    IntGauge* jvm_heap_size_bytes_max = nullptr;

    IntGauge* jvm_heap_size_bytes_committed = nullptr;

    IntGauge* jvm_heap_size_bytes_used = nullptr;

    IntGauge* jvm_non_heap_size_bytes_used = nullptr;

    IntGauge* jvm_non_heap_size_bytes_committed = nullptr;

    IntGauge* jvm_young_size_bytes_used = nullptr;

    IntGauge* jvm_young_size_bytes_peak_used = nullptr;

    IntGauge* jvm_young_size_bytes_max = nullptr;

    IntGauge* jvm_old_size_bytes_used = nullptr;

    IntGauge* jvm_old_size_bytes_peak_used = nullptr;

    IntGauge* jvm_old_size_bytes_max = nullptr;

    IntGauge* jvm_thread_count = nullptr;

    IntGauge* jvm_thread_peak_count = nullptr;

    IntGauge* jvm_thread_new_count = nullptr;

    IntGauge* jvm_thread_runnable_count = nullptr;

    IntGauge* jvm_thread_blocked_count = nullptr;

    IntGauge* jvm_thread_waiting_count = nullptr;

    IntGauge* jvm_thread_timed_waiting_count = nullptr;

    IntGauge* jvm_thread_terminated_count = nullptr;

    IntGauge* jvm_gc_g1_young_generation_count = nullptr;

    IntGauge* jvm_gc_g1_young_generation_time_ms = nullptr;

    IntGauge* jvm_gc_g1_old_generation_count = nullptr;

    IntGauge* jvm_gc_g1_old_generation_time_ms = nullptr;

private:

    JvmStats _jvm_stats;

    std::shared_ptr<MetricEntity> _server_entity;

    static const char* _s_hook_name;

    MetricRegistry* _registry = nullptr;

};

} // namespace doris