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package com.feingto.cloud.domain.api;

import com.feingto.cloud.constants.HystrixConstants;
import com.feingto.cloud.kit.json.JSON;
import com.netflix.hystrix.HystrixCommandProperties;
import lombok.Data;
import lombok.experimental.Accessors;
import org.hibernate.annotations.ColumnDefault;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.Message;

import javax.persistence.*;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 * 熔断配置
 *
 * @author longfei
 */
@Data
@Accessors(chain = true)
@MappedSuperclass
public class BaseHystrix implements Serializable {
    private static final long serialVersionUID = 609217708661782567L;

    @Transient
    protected String id;

    /**
     * 失败率达到多少百分比后熔断
     */
    @Column
    protected Integer circuitBreakerErrorThresholdPercentage = HystrixConstants.circuitBreakerErrorThresholdPercentage;

    /**
     * 熔断触发的最小个数/10s
     */
    @Column
    protected Integer circuitBreakerRequestVolumeThreshold = HystrixConstants.circuitBreakerRequestVolumeThreshold;

    /**
     * 熔断多少秒后去尝试请求
     */
    @Column
    protected Integer circuitBreakerSleepWindowInMilliseconds = HystrixConstants.circuitBreakerSleepWindowInMilliseconds;

    /**
     * 使用命令调用隔离方式, 默认: 采用线程隔离
     */
    @Enumerated(EnumType.STRING)
    @Column(length = 16)
    protected HystrixCommandProperties.ExecutionIsolationStrategy executionIsolationStrategy = HystrixCommandProperties.ExecutionIsolationStrategy.THREAD;

    /**
     * 线程池基本大小
     */
    @Column
    protected Integer threadCoreSize = HystrixConstants.coreSize;

    /**
     * 线程池最大线程数
     */
    @Column
    protected Integer threadMaximumSize = HystrixConstants.maximumSize;

    /**
     * 使用信号量隔离时命令调用最大的并发数
     */
    @Column
    protected Integer executionIsolationSemaphoreMaxConcurrentRequests = HystrixConstants.executionIsolationSemaphoreMaxConcurrentRequests;

    /**
     * 是否开启fallback降级策略
     */
    @Column
    @ColumnDefault("false")
    protected boolean fallbackEnabled = HystrixConstants.fallbackEnabled;

    /**
     * 命令fallback(降级)调用最大的并发数
     */
    @Column
    protected Integer fallbackIsolationSemaphoreMaxConcurrentRequests = HystrixConstants.fallbackIsolationSemaphoreMaxConcurrentRequests;

    /**
     * 调用超时时间
     */
    @Column
    protected Integer executionTimeoutInMilliseconds = HystrixConstants.executionTimeoutInMilliseconds;

    @Transient
    protected List baseApis = new ArrayList<>();

    public Message toMessage() {
        return MessageBuilder.withPayload(JSON.obj2json(this)).build();
    }
}