SpringBoot定時任務實現數據同步的方法
本文實例為大傢分享瞭SpringBoot定時任務實現數據同步的具體代碼,供大傢參考,具體內容如下
前言
業務的需求是,通過中臺調用api接口獲得,設備數據,要求現實設備數據的同步。
方案一:通過輪詢接口的方式執行 pullData() 方法實現數據同步
該方式的原理是先清空之前的所有數據,然後重新插入通過api調用獲取的最新數據。該方法的優點,邏輯簡單。缺點是,頻繁刪除、插入數據。再調用查詢數據時候,某一時刻,數據全部刪除,還沒及時插入的時候。數據可能有異常。
方案二:通過輪詢接口的方式執行 pullDataNew() 方法實現數據同步
該方式的原理是先查詢數據庫,已有數據,然後和通過api調用獲取的最新數據進行比對,找出數據中增量、減量和變量,進行同步更新。該方法的優點,減少對數據庫的頻繁操作,提升性能。缺點:無發現明顯缺點。
package com.hxtx.spacedata.task; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import com.baomidou.mybatisplus.core.toolkit.CollectionUtils; import com.google.api.client.util.Lists; import com.hxtx.spacedata.common.domain.ResponseDTO; import com.hxtx.spacedata.config.SpringContextUtil; import com.hxtx.spacedata.controller.file.FilesMinioController; import com.hxtx.spacedata.domain.entity.entityconfig.EntityPointEntity; import com.hxtx.spacedata.service.entityconfig.EntityPointService; import com.hxtx.spacedata.util.HttpProxyUtil; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; import org.springframework.transaction.annotation.Transactional; import java.util.List; import java.util.Map; import java.util.Objects; import java.util.stream.Collectors; /** * 中臺設備數據 定時任務執行 * * @author Tarzan Liu * @version 1.0.0 * @description * @date 2020/12/07 */ @Component @Slf4j public class EntityPointTask { @Autowired private EntityPointService entityPointService; @Value("${middleGround.server.host}") private String host; @Value("${middleGround.server.port}") private String port; private static FilesMinioController filesMinioController = SpringContextUtil.getBean(FilesMinioController.class); /** * 設備定義點數據拉取 * * @author tarzan Liu * @date 2020/12/2 */ @Scheduled(cron = "0/30 * * * * ?") // 30秒校驗一次 public void pullDataTaskByCorn() { String result = HttpProxyUtil.sendGet("http://" + host + ":" + port + "/interface/system/list"); JSONObject jsonObject = JSON.parseObject(result); if (Objects.nonNull(jsonObject)) { JSONArray array = jsonObject.getJSONArray("data"); if (array != null && array.size() != 0) { for (int i = 0; i < array.size(); i++) { JSONObject obj = array.getJSONObject(i); String systemId = obj.getString("id"); pullDataNew(systemId); } } } } @Transactional(rollbackFor = Throwable.class) public ResponseDTO<String> pullData(String code) { List<EntityPointEntity> list = Lists.newArrayList(); String result = HttpProxyUtil.sendGet("http://" + host + ":" + port + "/interface/defintionView/listBySystemId/" + code); JSONObject jsonObject = JSON.parseObject(result); if (Objects.nonNull(jsonObject)) { JSONArray array = jsonObject.getJSONArray("data"); if (array != null && array.size() != 0) { for (int i = 0; i < array.size(); i++) { JSONObject obj = array.getJSONObject(i); String pointId = obj.getString("pointId"); String name = obj.getString("name"); list.add(EntityPointEntity.builder().pointId(pointId).name(name).code(code).build()); } List<EntityPointEntity> existList = entityPointService.list(new LambdaQueryWrapper<EntityPointEntity>().eq(EntityPointEntity::getCode, code).isNotNull(EntityPointEntity::getValue)); if (CollectionUtils.isNotEmpty(existList)) { Map<String, String> existMap = existList.stream().collect(Collectors.toMap(EntityPointEntity::getPointId, EntityPointEntity::getValue)); list.forEach(e -> { String value = existMap.get(e.getPointId()); if (value != null) { e.setValue(value); } }); } entityPointService.remove(new LambdaQueryWrapper<EntityPointEntity>().eq(EntityPointEntity::getCode, code)); entityPointService.saveBatch(list); } } return ResponseDTO.succ(); } @Transactional(rollbackFor = Throwable.class) public ResponseDTO<String> pullDataNew(String code) { String result = HttpProxyUtil.sendGet("http://" + host + ":" + port + "/interface/defintionView/listBySystemId/" + code); JSONObject jsonObject = JSON.parseObject(result); if (Objects.nonNull(jsonObject)) { JSONArray data = jsonObject.getJSONArray("data"); List<EntityPointEntity> list = data.toJavaList(EntityPointEntity.class); if (CollectionUtils.isNotEmpty(list)) { list.forEach(e -> e.setCode(code)); List<EntityPointEntity> existList = entityPointService.list(new LambdaQueryWrapper<EntityPointEntity>().eq(EntityPointEntity::getCode, code)); if (CollectionUtils.isNotEmpty(existList)) { //存在map Map<String, String> existMap = existList.stream().collect(Collectors.toMap(EntityPointEntity::getPointId, EntityPointEntity::getName)); //傳輸map Map<String, String> dataMap = list.stream().collect(Collectors.toMap(EntityPointEntity::getPointId, EntityPointEntity::getName)); //增量 List<EntityPointEntity> increment = list.stream().filter(e -> existMap.get(e.getPointId()) == null).collect(Collectors.toList()); if (CollectionUtils.isNotEmpty(increment)) { entityPointService.saveBatch(increment); } //減量 List<EntityPointEntity> decrement = existList.stream().filter(e -> dataMap.get(e.getPointId()) == null).collect(Collectors.toList()); if (CollectionUtils.isNotEmpty(decrement)) { entityPointService.removeByIds(decrement.stream().map(EntityPointEntity::getId).collect(Collectors.toList())); } //變量 List<EntityPointEntity> variable = existList.stream().filter(e -> dataMap.get(e.getPointId()) != null && !dataMap.get(e.getPointId()).equals(e.getName())).collect(Collectors.toList()); if (CollectionUtils.isNotEmpty(variable)) { variable.forEach(e -> { e.setName(dataMap.get(e.getPointId())); }); entityPointService.updateBatchById(variable); } } else { entityPointService.saveBatch(list); } } } return ResponseDTO.succ(); } }
數據庫對應實體類
import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import lombok.AllArgsConstructor; import lombok.Builder; import lombok.Data; import lombok.NoArgsConstructor; import java.io.Serializable; import java.util.Date; @Builder @NoArgsConstructor @AllArgsConstructor @Data @TableName(value = "t_entity_point") public class EntityPointEntity implements Serializable { private static final long serialVersionUID = 2181036545424452651L; /** * 定義點id */ @TableId(value = "id", type = IdType.ASSIGN_ID) private Long id; /** * 定義點id */ private String pointId; /** * 名稱 */ private String name; /** * 繪制數據 */ private String value; /** * 編碼 */ private String code; /** * 創建時間 */ private Date createTime; }
HTTP請求代理工具類
import lombok.extern.slf4j.Slf4j; import org.apache.http.Consts; import org.apache.http.HttpEntity; import org.apache.http.HttpStatus; import org.apache.http.NameValuePair; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.conn.ssl.TrustStrategy; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.ssl.SSLContextBuilder; import org.apache.http.util.EntityUtils; import javax.net.ssl.SSLContext; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * HTTP請求代理類 * * @author tarzan Liu * @description 發送Get Post請求 */ @Slf4j public class HttpProxyUtil { /** * 使用URLConnection進行GET請求 * * @param api_url * @return */ public static String sendGet(String api_url) { return sendGet(api_url, "", "utf-8"); } /** * 使用URLConnection進行GET請求 * * @param api_url * @param param * @return */ public static String sendGet(String api_url, String param) { return sendGet(api_url, param, "utf-8"); } /** * 使用URLConnection進行GET請求 * * @param api_url 請求路徑 * @param param 請求格式有name1=value1&name2=value2、json、xml、map或其他形式,具體要看接收方的取值, 可以為空 * @param charset 字符集 * @return */ public static String sendGet(String api_url, String param, String charset) { StringBuffer buffer = new StringBuffer(); try { // 判斷有無參數,若是拼接好的url,就不必再拼接瞭 if (param != null && !"".equals(param)) { api_url = api_url + "?" + param; } log.info("請求的路徑是:" + api_url); URL realUrl = new URL(api_url); // 打開聯接 URLConnection conn = realUrl.openConnection(); // 設置通用的請求屬性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible; MSIE 6.0; Windows NT 5.1; SV1)"); conn.setConnectTimeout(12000); //設置連接主機超時(單位:毫秒) conn.setReadTimeout(12000); // 設置從主機讀取數據超時(單位:毫秒) conn.connect(); // 建立實際的聯接 // 定義 BufferedReader輸入流來讀取URL的相應 try (BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset))) { String line; while ((line = in.readLine()) != null) { // buffer.append("\n"+line); buffer.append(line); } } } catch (Exception e) { log.error("發送GET請求出現異常! " + e.getMessage()); return null; } // log.info("響應返回數據:" + buffer.toString()); return buffer.toString(); } /** * 使用URLConnection進行POST請求 * * @param api_url 請求路徑 * @param param 請求格式有name1=value1&name2=value2、json、xml、map或其他形式,具體要看接收方的取值,最好不為空 * @return */ public static String sendPost(String api_url, String param) { return sendPost(api_url, param, "utf-8"); } /** * 使用URLConnection進行POST請求 * * @param api_url 請求路徑 * @param param 請求格式有name1=value1&name2=value2、json、xml、map或其他形式,具體要看接收方的取值,最好不為空 * @param charset 字符集 * @return */ public static String sendPost(String api_url, String param, String charset) { StringBuffer buffer = new StringBuffer(); try { log.info("請求的路徑是:" + api_url + ",參數是:" + param); URL realUrl = new URL(api_url); // 打開聯接 URLConnection conn = realUrl.openConnection(); // 設置通用的請求屬性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible; MSIE 6.0; Windows NT 5.1; SV1)"); conn.setConnectTimeout(12000); //設置連接主機超時(單位:毫秒) conn.setReadTimeout(12000); // 設置從主機讀取數據超時(單位:毫秒) // 發送POST請求必須設置如下兩行 conn.setDoOutput(true); conn.setDoInput(true); // 獲取URLConnection對象對應的輸出流 try (PrintWriter out = new PrintWriter(conn.getOutputStream())) { out.print(param); // 發送請求參數 out.flush();// flush輸出流的緩沖 } // 定義 BufferedReader輸入流來讀取URL的相應,得指明使用UTF-8編碼,否則到API服務器XML的中文不能被成功識別 try (BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset))) { String line; while ((line = in.readLine()) != null) { // buffer.append("\n"+line); buffer.append(line); } } } catch (Exception e) { log.error("發送POST請求出現異常! " + e.getMessage()); e.printStackTrace(); } log.info("響應返回數據:" + buffer.toString()); return buffer.toString(); } public static CloseableHttpClient createSSLClientDefault() throws Exception { SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new AllTrustStrategy()).build(); SSLConnectionSocketFactory sslSf = new SSLConnectionSocketFactory(sslContext); return HttpClients.custom().setSSLSocketFactory(sslSf).build(); } // 加載證書 private static class AllTrustStrategy implements TrustStrategy { public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException { return true; } } /** * 支持https請求 * * @param url * @param param * @return * @throws Exception */ public static String sendHttpClientPost(String url, Map<String, String> param) throws Exception { CloseableHttpClient httpClient = createSSLClientDefault(); HttpPost httpPost = null; CloseableHttpResponse response = null; String result = ""; try { // 發起HTTP的POST請求 httpPost = new HttpPost(url); List<NameValuePair> paramList = new ArrayList<NameValuePair>(); for (String key : param.keySet()) { paramList.add(new BasicNameValuePair(key, param.get(key))); } log.info("http請求地址:" + url + ",參數:" + paramList.toString()); // UTF8+URL編碼 httpPost.setEntity(new UrlEncodedFormEntity(paramList, Consts.UTF_8)); httpPost.setConfig(RequestConfig.custom().setConnectTimeout(30000).setSocketTimeout(30000).build()); response = httpClient.execute(httpPost); HttpEntity entity = response.getEntity(); int statusCode = response.getStatusLine().getStatusCode(); if (HttpStatus.SC_OK == statusCode) { // 如果響應碼是200 } result = EntityUtils.toString(entity); log.info("狀態碼:" + statusCode + ",響應信息:" + result); } finally { if (response != null) { response.close(); } if (httpPost != null) { httpPost.releaseConnection(); } httpClient.close(); } return result; } }
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。
推薦閱讀:
- Java中Https發送POST請求[親測可用]
- Java發起http請求的完整步驟記錄
- java 百度手寫文字識別接口配置代碼
- 三種Java自定義DNS解析器方法與實踐
- springboot框架的全局異常處理方案詳解