package com.vci.ubcs.job.executor.jobhandler;

import com.xxl.job.core.biz.model.ReturnT;
import com.xxl.job.core.handler.IJobHandler;
import com.xxl.job.core.handler.annotation.XxlJob;
import com.xxl.job.core.log.XxlJobLogger;
import com.xxl.job.core.util.ShardingUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.TimeUnit;

/**
 * XxlJob开发示例（Bean模式）
 * <p>
 * 开发步骤：
 * 1、在Spring Bean实例中，开发Job方法，方式格式要求为 "public ReturnT<String> execute(String param)"
 * 2、为Job方法添加注解 "@XxlJob(value="自定义jobhandler名称", init = "JobHandler初始化方法", destroy = "JobHandler销毁方法")"，注解value值对应的是调度中心新建任务的JobHandler属性的值。
 * 3、执行日志：需要通过 "XxlJobLogger.log" 打印执行日志；
 *
 * @author xuxueli
 */
@Component
public class SampleXxlJob {
	private static final Logger logger = LoggerFactory.getLogger(SampleXxlJob.class);


	/**
	 * 1、简单任务示例（Bean模式）
	 */
	@XxlJob("demoJobHandler")
	public ReturnT<String> demoJobHandler(String param) throws Exception {
		XxlJobLogger.log("XXL-JOB, Hello World.");

		for (int i = 0; i < 5; i++) {
			XxlJobLogger.log("beat at:" + i);
			TimeUnit.SECONDS.sleep(2);
		}
		return ReturnT.SUCCESS;
	}


	/**
	 * 2、分片广播任务
	 */
	@XxlJob("shardingJobHandler")
	public ReturnT<String> shardingJobHandler(String param) throws Exception {

		// 分片参数
		ShardingUtil.ShardingVO shardingVO = ShardingUtil.getShardingVo();
		XxlJobLogger.log("分片参数：当前分片序号 = {}, 总分片数 = {}", shardingVO.getIndex(), shardingVO.getTotal());

		// 业务逻辑
		for (int i = 0; i < shardingVO.getTotal(); i++) {
			if (i == shardingVO.getIndex()) {
				XxlJobLogger.log("第 {} 片, 命中分片开始处理", i);
			} else {
				XxlJobLogger.log("第 {} 片, 忽略", i);
			}
		}

		return ReturnT.SUCCESS;
	}


	/**
	 * 3、命令行任务
	 */
	@XxlJob("commandJobHandler")
	public ReturnT<String> commandJobHandler(String param) throws Exception {
		String command = param;
		int exitValue = -1;

		BufferedReader bufferedReader = null;
		try {
			// command process
			Process process = Runtime.getRuntime().exec(command);
			BufferedInputStream bufferedInputStream = new BufferedInputStream(process.getInputStream());
			bufferedReader = new BufferedReader(new InputStreamReader(bufferedInputStream));

			// command log
			String line;
			while ((line = bufferedReader.readLine()) != null) {
				XxlJobLogger.log(line);
			}

			// command exit
			process.waitFor();
			exitValue = process.exitValue();
		} catch (Exception e) {
			XxlJobLogger.log(e);
		} finally {
			if (bufferedReader != null) {
				bufferedReader.close();
			}
		}

		if (exitValue == 0) {
			return IJobHandler.SUCCESS;
		} else {
			return new ReturnT<String>(IJobHandler.FAIL.getCode(), "command exit value(" + exitValue + ") is failed");
		}
	}


	/**
	 * 4、跨平台Http任务
	 */
	@XxlJob("httpJobHandler")
	public ReturnT<String> httpJobHandler(String param) throws Exception {

		// request
		HttpURLConnection connection = null;
		BufferedReader bufferedReader = null;
		try {
			// connection
			URL realUrl = new URL(param);
			connection = (HttpURLConnection) realUrl.openConnection();

			// connection setting
			connection.setRequestMethod("GET");
			connection.setDoOutput(true);
			connection.setDoInput(true);
			connection.setUseCaches(false);
			connection.setReadTimeout(5 * 1000);
			connection.setConnectTimeout(3 * 1000);
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
			connection.setRequestProperty("Accept-Charset", "application/json;charset=UTF-8");

			// do connection
			connection.connect();

			//Map<String, List<String>> map = connection.getHeaderFields();

			// valid StatusCode
			int statusCode = connection.getResponseCode();
			if (statusCode != 200) {
				throw new RuntimeException("Http Request StatusCode(" + statusCode + ") Invalid.");
			}

			// result
			bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
			StringBuilder result = new StringBuilder();
			String line;
			while ((line = bufferedReader.readLine()) != null) {
				result.append(line);
			}
			String responseMsg = result.toString();

			XxlJobLogger.log(responseMsg);
			return ReturnT.SUCCESS;
		} catch (Exception e) {
			XxlJobLogger.log(e);
			return ReturnT.FAIL;
		} finally {
			try {
				if (bufferedReader != null) {
					bufferedReader.close();
				}
				if (connection != null) {
					connection.disconnect();
				}
			} catch (Exception e2) {
				XxlJobLogger.log(e2);
			}
		}

	}

	/**
	 * 5、生命周期任务示例：任务初始化与销毁时，支持自定义相关逻辑；
	 */
	@XxlJob(value = "demoJobHandler2", init = "init", destroy = "destroy")
	public ReturnT<String> demoJobHandler2(String param) throws Exception {
		XxlJobLogger.log("XXL-JOB, Hello World.");
		return ReturnT.SUCCESS;
	}

	public void init() {
		logger.info("init");
	}

	public void destroy() {
		logger.info("destory");
	}


}