JarCastinginfluxdb-client-java
This repository contains the reference JVM clients for the InfluxDB 2.0. Currently, Java, Reactive, Kotlin and Scala clients are implemented.
Note: Use this client library with InfluxDB 2.x and InfluxDB 1.8+ (see details). For connecting to InfluxDB 1.7 or earlier instances, use the influxdb-java client library.
Features
- InfluxDB 2.0 client
- Querying data using the Flux language
- Writing data using
- Line Protocol
- Data Point
- POJO
- InfluxDB 2.0 Management API client for managing
- sources, buckets
- tasks
- authorizations
- health check
- ...
- Supports querying using the Flux language over the InfluxDB 1.7+ REST API (
/api/v2/query endpoint)
Documentation
The Java, Reactive, OSGi, Kotlin and Scala clients are implemented for the InfluxDB 2.0:
| Client | Description | Documentation | Compatibility |
|---|---|---|---|
| java | The reference Java client that allows query, write and InfluxDB 2.0 management. | javadoc, readme | 2.0 |
| reactive | The reference RxJava client for the InfluxDB 2.0 that allows query and write in a reactive way. | javadoc, readme | 2.0 |
| kotlin | The reference Kotlin client that allows query and write for the InfluxDB 2.0 by Kotlin Channel and Flow coroutines. | KDoc, readme | 2.0 |
| scala | The reference Scala client that allows query and write for the InfluxDB 2.0 by Akka Streams. | Scaladoc, readme | 2.0 |
| osgi | The reference OSGi (R6) client embedding Java and reactive clients and providing standard features (declarative services, configuration, event processing) for the InfluxDB 2.0. | javadoc, readme | 2.0 |
| karaf | The Apache Karaf feature definition for the InfluxDB 2.0. | readme | 2.0 |
There is also possibility to use the Flux language over the InfluxDB 1.7+ provided by:
| Client | Description | Documentation | Compatibility |
|---|---|---|---|
| flux | The reference Java client that allows you to perform Flux queries against InfluxDB 1.7+. | javadoc, readme | 1.7+ |
The last useful part is flux-dsl that helps construct Flux query by Query builder pattern:
Flux flux = Flux
.from("telegraf")
.window(15L, ChronoUnit.MINUTES, 20L, ChronoUnit.SECONDS)
.sum();
| Module | Description | Documentation | Compatibility |
|---|---|---|---|
| flux-dsl | A Java query builder for the Flux language | javadoc, readme | 1.7+, 2.0 |
How To Use
This clients are hosted in Maven central Repository.
If you want to use it with the Maven, you have to add only the dependency on the artifact.
Writes and Queries in InfluxDB 2.0
The following example demonstrates how to write data to InfluxDB 2.0 and read them back using the Flux language.
Installation
Download the latest version:
Maven dependency:
<dependency>
<groupId>com.influxdb</groupId>
<artifactId>influxdb-client-java</artifactId>
<version>2.2.0</version>
</dependency>
Or when using Gradle:
dependencies {
compile "com.influxdb:influxdb-client-java:2.2.0"
}
package example;
import java.time.Instant;
import java.util.List;
import com.influxdb.annotations.Column;
import com.influxdb.annotations.Measurement;
import com.influxdb.client.InfluxDBClient;
import com.influxdb.client.InfluxDBClientFactory;
import com.influxdb.client.QueryApi;
import com.influxdb.client.WriteApi;
import com.influxdb.client.domain.WritePrecision;
import com.influxdb.client.write.Point;
import com.influxdb.query.FluxRecord;
import com.influxdb.query.FluxTable;
public class InfluxDB2Example {
private static char[] token = "my-token".toCharArray();
private static String org = "my-org";
private static String bucket = "my-bucket";
public static void main(final String[] args) {
InfluxDBClient influxDBClient = InfluxDBClientFactory.create("http://localhost:8086", token, org, bucket);
//
// Write data
//
try (WriteApi writeApi = influxDBClient.getWriteApi()) {
//
// Write by Data Point
//
Point point = Point.measurement("temperature")
.addTag("location", "west")
.addField("value", 55D)
.time(Instant.now().toEpochMilli(), WritePrecision.MS);
writeApi.writePoint(point);
//
// Write by LineProtocol
//
writeApi.writeRecord(WritePrecision.MS, "temperature,location=north value=60.0");
//
// Write by POJO
//
Temperature temperature = new Temperature();
temperature.location = "south";
temperature.value = 62D;
temperature.time = Instant.now();
writeApi.writeMeasurement(WritePrecision.MS, temperature);
}
//
// Query data
//
String flux = "from(bucket:\"my-bucket\") |> range(start: 0)";
QueryApi queryApi = influxDBClient.getQueryApi();
List<FluxTable> tables = queryApi.query(flux);
for (FluxTable fluxTable : tables) {
List<FluxRecord> records = fluxTable.getRecords();
for (FluxRecord fluxRecord : records) {
System.out.println(fluxRecord.getTime() + ": " + fluxRecord.getValueByKey("_value"));
}
}
influxDBClient.close();
}
@Measurement(name = "temperature")
private static class Temperature {
@Column(tag = true)
String location;
@Column
Double value;
@Column(timestamp = true)
Instant time;
}
}
Use Management API to create a new Bucket in InfluxDB 2.0
The following example demonstrates how to use a InfluxDB 2.0 Management API. For further information see client documentation.
Installation
Download the latest version:
Maven dependency:
<dependency>
<groupId>com.influxdb</groupId>
<artifactId>influxdb-client-java</artifactId>
<version>2.2.0</version>
</dependency>
Or when using Gradle:
dependencies {
compile "com.influxdb:influxdb-client-java:2.2.0"
}
package example;
import java.util.Arrays;
import com.influxdb.client.InfluxDBClient;
import com.influxdb.client.InfluxDBClientFactory;
import com.influxdb.client.domain.Authorization;
import com.influxdb.client.domain.Bucket;
import com.influxdb.client.domain.Permission;
import com.influxdb.client.domain.PermissionResource;
import com.influxdb.client.domain.BucketRetentionRules;
public class InfluxDB2ManagementExample {
private static char[] token = "my-token".toCharArray();
public static void main(final String[] args) {
InfluxDBClient influxDBClient = InfluxDBClientFactory.create("http://localhost:8086", token);
//
// Create bucket "iot_bucket" with data retention set to 3,600 seconds
//
BucketRetentionRules retention = new BucketRetentionRules();
retention.setEverySeconds(3600);
Bucket bucket = influxDBClient.getBucketsApi().createBucket("iot-bucket", retention, "12bdc4164c2e8141");
//
// Create access token to "iot_bucket"
//
PermissionResource resource = new PermissionResource();
resource.setId(bucket.getId());
resource.setOrgID("12bdc4164c2e8141");
resource.setType(PermissionResource.TypeEnum.BUCKETS);
// Read permission
Permission read = new Permission();
read.setResource(resource);
read.setAction(Permission.ActionEnum.READ);
// Write permission
Permission write = new Permission();
write.setResource(resource);
write.setAction(Permission.ActionEnum.WRITE);
Authorization authorization = influxDBClient.getAuthorizationsApi()
.createAuthorization("12bdc4164c2e8141", Arrays.asList(read, write));
//
// Created token that can be use for writes to "iot_bucket"
//
String token = authorization.getToken();
System.out.println("Token: " + token);
influxDBClient.close();
}
}
InfluxDB 1.8 API compatibility
InfluxDB 1.8.0 introduced forward compatibility APIs for InfluxDB 2.0. This allow you to easily move from InfluxDB 1.x to InfluxDB 2.0 Cloud or open source.
The following forward compatible APIs are available:
| API | Endpoint | Description |
|---|---|---|
| QueryApi.java | /api/v2/query | Query data in InfluxDB 1.8.0+ using the InfluxDB 2.0 API and Flux (endpoint should be enabled by flux-enabled option) |
| WriteApi.java | /api/v2/write | Write data to InfluxDB 1.8.0+ using the InfluxDB 2.0 API |
| health() | /health | Check the health of your InfluxDB instance |
For detail info see InfluxDB 1.8 example.
Flux queries in InfluxDB 1.7+
The following example demonstrates querying using the Flux language.
Installation
Download the latest version:
Maven dependency:
<dependency>
<groupId>com.influxdb</groupId>
<artifactId>influxdb-client-flux</artifactId>
<version>2.2.0</version>
</dependency>
Or when using Gradle:
dependencies {
compile "com.influxdb:influxdb-client-flux:2.2.0"
}
package example;
import java.util.List;
import com.influxdb.client.flux.FluxClient;
import com.influxdb.client.flux.FluxClientFactory;
import com.influxdb.query.FluxRecord;
import com.influxdb.query.FluxTable;
public class FluxExample {
public static void main(String[] args) {
FluxClient fluxClient = FluxClientFactory.create("http://localhost:8086/");
//
// Flux
//
String flux = "from(bucket: \"telegraf\")\n" +
" |> range(start: -1d)" +
" |> filter(fn: (r) => (r[\"_measurement\"] == \"cpu\" and r[\"_field\"] == \"usage_system\"))" +
" |> sample(n: 5, pos: 1)";
//
// Synchronous query
//
List<FluxTable> tables = fluxClient.query(flux);
for (FluxTable fluxTable : tables) {
List<FluxRecord> records = fluxTable.getRecords();
for (FluxRecord fluxRecord : records) {
System.out.println(fluxRecord.getTime() + ": " + fluxRecord.getValueByKey("_value"));
}
}
//
// Asynchronous query
//
fluxClient.query(flux, (cancellable, record) -> {
// process the flux query result record
System.out.println(record.getTime() + ": " + record.getValue());
}, error -> {
// error handling while processing result
System.out.println("Error occurred: "+ error.getMessage());
}, () -> {
// on complete
System.out.println("Query completed");
});
fluxClient.close();
}
}
Build Requirements
- Java 1.8+ (tested with jdk8)
- Maven 3.0+ (tested with maven 3.5.0)
- Docker daemon running
- The latest InfluxDB 2.0 and InfluxDB 1.X docker instances, which can be started using the
./scripts/influxdb-restart.shscript
Once these are in place you can build influxdb-client-java with all tests with:
$ mvn clean install
If you don't have Docker running locally, you can skip tests with the -DskipTests flag set to true:
$ mvn clean install -DskipTests=true
If you have Docker running, but it is not available over localhost (e.g. you are on a Mac and using docker-machine) you can set optional environment variables to point to the correct IP addresses and ports:
INFLUXDB_IPINFLUXDB_PORT_APIINFLUXDB_2_IPINFLUXDB_2_PORT_API
$ export INFLUXDB_IP=192.168.99.100
$ mvn test
Contributing
If you would like to contribute code you can do through GitHub by forking the repository and sending a pull request into the master branch.
License
The InfluxDB 2.0 JVM Based Clients are released under the MIT License.
