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| 时序数据库：Time Series Database (TSDB) | ||
| https://github.com/influxdata/influxdb | ||
| https://docs.influxdata.com/influxdb/v1.7/introduction/getting-started/ | ||
| https://docs.influxdata.com/influxdb/v1.7/administration/config | ||
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| Java客户端 | ||
| https://github.com/influxdata/influxdb-java | ||
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quickstart-influxdb/src/test/java/org/quickstart/influxdb/example/InfluxDBTest.java
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| package org.quickstart.influxdb.example; | ||
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| import java.util.concurrent.TimeUnit; | ||
| import org.influxdb.BatchOptions; | ||
| import org.influxdb.InfluxDB; | ||
| import org.influxdb.InfluxDBFactory; | ||
| import org.influxdb.dto.Point; | ||
| import org.influxdb.dto.Query; | ||
| import org.influxdb.dto.QueryResult; | ||
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| /** | ||
| * @author [email protected] | ||
| * @description TODO | ||
| * @createTime 2020/6/11 22:48 | ||
| */ | ||
| public class InfluxDBTest { | ||
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| public static void main(String[] args) throws InterruptedException { | ||
| // Create an object to handle the communication with InfluxDB. | ||
| // (best practice tip: reuse the 'influxDB' instance when possible) | ||
| final String serverURL = "http://127.0.0.1:8086", username = "root", password = "root"; | ||
| final InfluxDB influxDB = InfluxDBFactory.connect(serverURL, username, password); | ||
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| // Create a database... | ||
| // https://docs.influxdata.com/influxdb/v1.7/query_language/database_management/ | ||
| String databaseName = "NOAA_water_database"; | ||
| influxDB.query(new Query("CREATE DATABASE " + databaseName)); | ||
| influxDB.setDatabase(databaseName); | ||
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| // ... and a retention policy, if necessary. | ||
| // https://docs.influxdata.com/influxdb/v1.7/query_language/database_management/ | ||
| String retentionPolicyName = "one_day_only"; | ||
| influxDB.query(new Query("CREATE RETENTION POLICY " + retentionPolicyName | ||
| + " ON " + databaseName + " DURATION 1d REPLICATION 1 DEFAULT")); | ||
| influxDB.setRetentionPolicy(retentionPolicyName); | ||
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| // Enable batch writes to get better performance. | ||
| influxDB.enableBatch(BatchOptions.DEFAULTS); | ||
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| // Write points to InfluxDB. | ||
| influxDB.write(Point.measurement("h2o_feet") | ||
| .time(System.currentTimeMillis(), TimeUnit.MILLISECONDS) | ||
| .tag("location", "santa_monica") | ||
| .addField("level description", "below 3 feet") | ||
| .addField("water_level", 2.064d) | ||
| .build()); | ||
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| influxDB.write(Point.measurement("h2o_feet") | ||
| .time(System.currentTimeMillis(), TimeUnit.MILLISECONDS) | ||
| .tag("location", "coyote_creek") | ||
| .addField("level description", "between 6 and 9 feet") | ||
| .addField("water_level", 8.12d) | ||
| .build()); | ||
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| // Wait a few seconds in order to let the InfluxDB client | ||
| // write your points asynchronously (note: you can adjust the | ||
| // internal time interval if you need via 'enableBatch' call). | ||
| Thread.sleep(5_000L); | ||
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| // Query your data using InfluxQL. | ||
| // https://docs.influxdata.com/influxdb/v1.7/query_language/data_exploration/#the-basic-select-statement | ||
| QueryResult queryResult = influxDB.query(new Query("SELECT * FROM h2o_feet")); | ||
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| System.out.println(queryResult); | ||
| // It will print something like: | ||
| // QueryResult [results=[Result [series=[Series [name=h2o_feet, tags=null, | ||
| // columns=[time, level description, location, water_level], | ||
| // values=[ | ||
| // [2020-03-22T20:50:12.929Z, below 3 feet, santa_monica, 2.064], | ||
| // [2020-03-22T20:50:12.929Z, between 6 and 9 feet, coyote_creek, 8.12] | ||
| // ]]], error=null]], error=null] | ||
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| // Close it if your application is terminating or you are not using it anymore. | ||
| influxDB.close(); | ||
| } | ||
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| } |
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