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/*
 * Copyright (c) 2020-2030, Shuigedeng ([email protected] & https://blog.taotaocloud.top/).
 *
 * 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
 *
 *      https://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 com.taotao.boot.monitor.collect.task;

import ch.qos.logback.core.util.Duration;
import com.taotao.boot.common.utils.context.ContextUtils;
import com.taotao.boot.common.utils.log.LogUtils;
import com.taotao.boot.common.utils.reflect.ClassUtils;
import com.taotao.boot.common.utils.reflect.ReflectionUtils;
import com.taotao.boot.monitor.annotation.FieldReport;
import com.taotao.boot.monitor.collect.AbstractCollectTask;
import com.taotao.boot.monitor.collect.CollectInfo;
import com.taotao.boot.monitor.properties.CollectTaskProperties;
import net.logstash.logback.appender.LogstashTcpSocketAppender;
import net.logstash.logback.appender.destination.PreferPrimaryDestinationConnectionStrategy;

import java.util.Objects;

/**
 * ELK性能采集
 *
 * @author shuigedeng
 * @version 2021.9
 * @since 2021-09-10 17:38:09
 */
public class ElkCollectTask extends AbstractCollectTask {

    private static final String TASK_NAME = "ttc.monitor.collect.elk";

    private final CollectTaskProperties properties;
    private final boolean classExist;

    public ElkCollectTask(CollectTaskProperties properties) {
        this.properties = properties;
        this.classExist = ClassUtils.isExist("net.logstash.logback.appender.LogstashTcpSocketAppender");
    }

    @Override
    public int getTimeSpan() {
        return properties.getElkTimeSpan();
    }

    @Override
    public boolean getEnabled() {
        return properties.isElkEnabled() && classExist;
    }

    @Override
    public String getDesc() {
        return this.getClass().getName();
    }

    @Override
    public String getName() {
        return TASK_NAME;
    }

    @Override
    protected CollectInfo getData() {
        try {
            ElkInfo info = new ElkInfo();
            LogstashTcpSocketAppender appender = ContextUtils.getBean(LogstashTcpSocketAppender.class, true);
            if (Objects.nonNull(appender)) {
                info.ringBufferSize = appender.getRingBufferSize();
                info.consecutiveDropped = ReflectionUtils.tryGetValue(appender, "consecutiveDroppedCount.get");
                info.droppedWarnFrequency = appender.getDroppedWarnFrequency();

				try {
					info.keepAliveDuration = appender.getKeepAliveDuration().getMilliseconds();
					info.producerType = appender.getProducerType().name();
					info.reconnectionDelay = appender.getReconnectionDelay().getMilliseconds();
				} catch (Exception e) {
				}

				Duration duration =
                        appender.getConnectionStrategy() instanceof PreferPrimaryDestinationConnectionStrategy
                                ? ((PreferPrimaryDestinationConnectionStrategy) appender.getConnectionStrategy())
                                        .getSecondaryConnectionTTL()
                                : null;
                if (Objects.nonNull(duration)) {
                    info.secondaryConnectionTtl = duration.getMilliseconds();
                }

                info.writeTimeout = appender.getWriteTimeout().getMilliseconds();
                info.writeBufferSize = appender.getWriteBufferSize();
                return info;
            }
        } catch (Exception e) {
            if (LogUtils.isErrorEnabled()) {
                LogUtils.error(e);
            }
        }
        return null;
    }

    private static class ElkInfo implements CollectInfo {

        @FieldReport(name = TASK_NAME + ".ring.buffer.size", desc = "ELK消息队列大小")
        private Integer ringBufferSize = 0;

        @FieldReport(name = TASK_NAME + ".consecutive.dropped.count", desc = "ELK消息连续丢弃数量")
        private Long consecutiveDropped = 0L;

        @FieldReport(name = TASK_NAME + ".dropped.warn.frequency", desc = "ELK下降警告频率")
        private Integer droppedWarnFrequency = 0;

        @FieldReport(name = TASK_NAME + ".keep.alive.duration", desc = "ELK保持活动持续时间")
        private Long keepAliveDuration = 0L;

        @FieldReport(name = TASK_NAME + ".producer.type", desc = "ELK生产者类型")
        private String producerType = "";

        @FieldReport(name = TASK_NAME + ".reconnection.delay", desc = "ELK在与目标的连接失败后，在尝试重新连接到该目标之前等待的时间段")
        private Long reconnectionDelay = 0L;

        @FieldReport(name = TASK_NAME + ".secondary.connection.ttl", desc = "ELK辅助连接 TTL大小")
        private Long secondaryConnectionTtl = 0L;

        @FieldReport(name = TASK_NAME + ".write.timeout", desc = "ELK在超时之前等待写入完成的时间段.并尝试重新连接到该目的地。")
        private Long writeTimeout = 0L;

        @FieldReport(name = TASK_NAME + ".write.buffer.size", desc = "ELK消写入缓冲区中可用的字节数")
        private Integer writeBufferSize = 0;
    }
}