建网站要几个域名,上海装修公司排名49,微盟商户助手,wordpress xml地图文章目录 1 摘要2 背景2.1 问题一#xff1a;针对Influx V2.0工具2.2 问题二#xff1a;针对Influx查询语言 3 需求分析4 快速入门4.1 客户端驱动版本选择4.2 连接influx4.2.1 influx配置信息4.2.2 influx连接配置4.2.3 测试连通情况 5 Influx工具类5.1 InfluxQL工具类5.1.1 … 文章目录 1 摘要2 背景2.1 问题一针对Influx V2.0工具2.2 问题二针对Influx查询语言 3 需求分析4 快速入门4.1 客户端驱动版本选择4.2 连接influx4.2.1 influx配置信息4.2.2 influx连接配置4.2.3 测试连通情况 5 Influx工具类5.1 InfluxQL工具类5.1.1 出现背景5.1.2 InfluxQL工具类 5.2 插入数据工具类 1 摘要
摘要InfluxQLInfluxQL工具类influxdb.java客户端
2 背景
2.1 问题一针对Influx V2.0工具 针对新版Influx V2.0 版本数据库 其一influx支持两种查询语言flux和InfluxQL然后InfluxQL在高版本中已没有得到较好维护因而在后续开发中笔者采用Influx V1.x 版本来进行开发。 2.2 问题二针对Influx查询语言 针对使用新版Influx数据库目前在其上做操做有两种方法 其一使用官方的UI工具缺点由于是可视化拼购操作对操作有所限制。其二使用flux语言flux是一种查询语言其语法格式类似于R语言具有管道符这些的形式其也是官方所推荐的然而由于没太使用过此处不做展开如有兴趣自己查询。最后也就是笔者所推荐的InfluxQL其语法格式高度切合于SQL语言因而作为influx快速使用所推荐。 3 需求分析 正如上述所描述问题此处选择环境: 版本influx v1.x查询实现语言InfluxQL 4 快速入门
4.1 客户端驱动版本选择 !--influxDB--dependencygroupIdorg.influxdb/groupIdartifactIdinfluxdb-java/artifactIdversion2.19/version/dependency4.2 连接influx
4.2.1 influx配置信息
示例如下可以优化
spring:influxdb:url: yourURLdatabaseApply: databaseName1databaseTemp: databaseName24.2.2 influx连接配置
/*** influx配置读取*/
Data
Component
ConfigurationProperties(prefix spring.influxdb)
public class InfluxProperties {private String url; //influx访问URL
// private String user; //用户名
// private String password; //密码private String databaseApply; //应用数据库private String databaseTemp; //备份用数据库public InfluxDB getConnectionDatabaseApply() {return InfluxDBFactory.connect(url).setDatabase(databaseApply);}public InfluxDB getConnectionDatabaseTemp() {return InfluxDBFactory.connect(url).setDatabase(databaseTemp);}
}4.2.3 测试连通情况 Testpublic void testInfluxQLWithMoreTerm() {InfluxDB influxDB influxProperties.getConnectionDatabaseTemp();System.out.println(influxDB.ping() influxDB.ping());}
}
5 Influx工具类
5.1 InfluxQL工具类
5.1.1 出现背景 目前针对InfluxQL暂无诸如mybatis样的持久层框架因而此处提供一种工具类的解决方案。 核心思想InfluxQL高度类似于SQL因而我们把诸如select、group等着关键字封装成工具类方法以实现链式InfluxQL便于后续开发于维护。 5.1.2 InfluxQL工具类
/*** InfluxQL构造器** author jx* date 2023/7/23 21:24*/public class InfluxQLQuery {private final StringBuilder queryBuilder;private String database;private InfluxQLQuery(String query) {this.queryBuilder new StringBuilder(query);}public static InfluxQLQuery select(String... fields) {StringJoiner joiner new StringJoiner(, );for (String field : fields) {if (!field.isEmpty()) {joiner.add(field);}}return new InfluxQLQuery(SELECT joiner);}// SELECT max(A_Cond_Temp), min(A_Feed_Pump_Power_Cons_Rate) FROM JJjTEStljx GROUP BY A_Cond_Temp, A_Feed_Pump_Power_Cons_Ratepublic InfluxQLQuery select(ListAggregationType aggregationTypes, String... fields) {//得到类型ListString list new ArrayList();for (AggregationType aggregationType : aggregationTypes) {list.add(aggregationType (\ fields \);}return new InfluxQLQuery(SELECT list);}public InfluxQLQuery from(String measurement) {queryBuilder.append( FROM ).append(measurement);return this;}public InfluxQLQuery where(String condition) {queryBuilder.append( WHERE ).append(condition);return this;}public InfluxQLQuery groupBy(String grouping) {queryBuilder.append( GROUP BY ).append(grouping);return this;}/*** 设置查询时时间戳为上海时间** return 上海时区*/public InfluxQLQuery setShanghaiTimeZone() {queryBuilder.append( tz(Asia/Shanghai) );return this;}public QueryResult execute(InfluxDB influxDB, String database) {Query queryObject new Query(queryBuilder.toString(), database);return influxDB.query(queryObject);}public InfluxQLQuery selectMean(String field) {queryBuilder.append(MEAN().append(field).append());return this;}public InfluxQLQuery selectMin(String field) {queryBuilder.append(min().append(field).append());return this;}public InfluxQLQuery selectMax(String field) {queryBuilder.append(max().append(field).append());return this;}public InfluxQLQuery selectSum(String field) {queryBuilder.append( sum().append(field).append());return this;}public InfluxQLQuery selectCount(String field) {queryBuilder.append( count().append(field).append());return this;}/*** 查询结果的最大数量** param limit* return*/public InfluxQLQuery limit(int limit) {queryBuilder.append( LIMIT ).append(limit);return this;}/*** 设置当前操作的值。** param interval* return*/public InfluxQLQuery interval(String interval) {queryBuilder.append( INTERVAL ).append(interval);return this;}/*** 设置查询条件中的标签。** param tags* return*/public InfluxQLQuery whereTags(MapString, String tags) {StringBuilder tagsBuilder new StringBuilder();for (Map.EntryString, String entry : tags.entrySet()) {String tagKey entry.getKey();String tagValue entry.getValue();tagsBuilder.append( \).append(tagKey).append(\).append(tagValue).append( AND);}// 删除最后的 ANDif (tagsBuilder.length() 0) {tagsBuilder.setLength(tagsBuilder.length() - 4);}queryBuilder.append( WHERE).append(tagsBuilder);return this;}/*** 设置填充策略。** param value* return*/public InfluxQLQuery fill(String value) {queryBuilder.append( fill().append(value).append());return this;}/*** 查询结果的排序方式。** param field* param direction* return*/public InfluxQLQuery orderBy(String field, String direction) {queryBuilder.append( ORDER BY ).append(field).append( ).append(direction);return this;}/*** 设置结果集的返回数量上限。** param limit* return*/public InfluxQLQuery sLimit(int limit) {queryBuilder.append( SLIMIT ).append(limit);return this;}/*** 设置结果集的偏移量。** param offset* return*/public InfluxQLQuery sOffset(int offset) {queryBuilder.append( SOFFSET ).append(offset);return this;}/*** 指定写入的目标measurement** param targetMeasurement* return*/public InfluxQLQuery into(String targetMeasurement) {queryBuilder.append( INTO ).append(targetMeasurement);return this;}/*** 指定写入数据时的标签** param tagKey* param tagValue* return*/public InfluxQLQuery withTag(String tagKey, String tagValue) {queryBuilder.append( WITH ).append(tagKey).append().append(tagValue);return this;}/*** 创建数据保留策略** param policyName* param duration* param replication* param isDefault* return*/public InfluxQLQuery createRetentionPolicy(String policyName, String duration, String replication,boolean isDefault) {queryBuilder.append( CREATE RETENTION POLICY ).append(\).append(policyName).append(\).append( ON ).append(database).append( DURATION ).append(duration).append( REPLICATION ).append(replication);if (isDefault) {queryBuilder.append( DEFAULT);}return this;}/*** 展示当前数据库的所有保留策略。** return*/public InfluxQLQuery showRetentionPolicies() {queryBuilder.append( SHOW RETENTION POLICIES).append( ON ).append(database);return this;}/*** 删除指定的数据保留策略。** param policyName* return*/public InfluxQLQuery dropRetentionPolicy(String policyName) {queryBuilder.append( DROP RETENTION POLICY ).append(\).append(policyName).append(\).append( ON ).append(database);return this;}/*** 创建用户** param username* param password* return*/public InfluxQLQuery createUser(String username, String password) {queryBuilder.append( CREATE USER ).append(\).append(username).append(\).append( WITH PASSWORD ).append().append(password).append();return this;}/*** 设置用户密码** param username* param password* return*/public InfluxQLQuery setUserPassword(String username, String password) {queryBuilder.append( SET PASSWORD FOR ).append(\).append(username).append(\).append( ).append().append(password).append();return this;}/*** 设置当前操作的数据库。** param database* return*/public InfluxQLQuery setDatabase(String database) {this.database database;return this;}/*** 设置当前操作的measurement。** param measurement* return*/public InfluxQLQuery setMeasurement(String measurement) {queryBuilder.append( ).append(measurement);return this;}/*** 设置当前操作的字段。** param field* return*/public InfluxQLQuery setField(String field) {queryBuilder.append( ).append(field);return this;}/*** 设置当前操作的值。** param value* return*/public InfluxQLQuery setValue(String value) {queryBuilder.append( ).append(value);return this;}public InfluxQLQuery aggFunction(InfluxQLQuery influxQLQuery, TimeType timeType, String field) {if (influxQLQuery null || timeType null || field null) {return null;}switch (timeType) {case MAX:influxQLQuery.selectMax(field);break;case AVG:influxQLQuery.selectMean(field);break;case MIN:influxQLQuery.selectMin(field);break;case SUM:influxQLQuery.selectSum(field);break;default:return null;}return influxQLQuery;}public static InfluxQLQuery groupBy(String... fields) {StringJoiner joiner new StringJoiner(, );for (String field : fields) {if (!field.isEmpty()) {joiner.add(field);}}return new InfluxQLQuery(SELECT joiner);}
}5.2 插入数据工具类 注意此处相关逻辑需要依据入库实际需求而适应 Resourceprivate InfluxProperties influxProperties;/*** 插入influx应用数据库** param assetId 表名* param pointId 测点名* param pointValue 测点值* param time 消息时间戳*/public void intoInfluxApply(String assetId, String pointId, Double pointValue, Long time) {InfluxDB influxDBApply influxProperties.getConnectionDatabaseApply();//创建要写入的数据点MapString, Object fields new HashMap();fields.put(pointId, pointValue); //测单标识符值// 写入数据Point point Point.measurement(assetId)//表名.time(time, TimeUnit.MILLISECONDS)//时间戳.fields(fields)//添加一个字段的多个属性值.build();influxDBApply.write(influxProperties.getDatabaseApply(), autogen, point);}/*** 插入influx备份数据库** param assetId 表名* param pointId 测点名* param pointValue 测点值* param time 消息时间戳*/public void intoInfluxTemp(String assetId, String pointId, Double pointValue, Long time) {InfluxDB influxDBApply influxProperties.getConnectionDatabaseTemp();//创建要写入的数据点MapString, Object fields new HashMap();fields.put(pointId, pointValue); //测单标识符值// 写入数据Point point Point.measurement(assetId)//表名.time(time, TimeUnit.MILLISECONDS)//时间戳.fields(fields)//添加一个字段的多个属性值.build();try {influxDBApply.write(influxProperties.getDatabaseTemp(), autogen, point);} catch (Exception e) {log.info({}, 写入influx临时数据库出现错误 e.getMessage());}}
