120 lines
3.8 KiB
Java
120 lines
3.8 KiB
Java
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/*
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* Copyright 2020 Mark Nellemann <mark.nellemann@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package biz.nellemann.svci;
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import biz.nellemann.svci.dto.toml.InfluxConfiguration;
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import org.influxdb.BatchOptions;
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import org.influxdb.InfluxDB;
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import org.influxdb.InfluxDBFactory;
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import org.influxdb.dto.Point;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.TimeUnit;
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import static java.lang.Thread.sleep;
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public final class InfluxClient {
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private final static Logger log = LoggerFactory.getLogger(InfluxClient.class);
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final private String url;
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final private String username;
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final private String password;
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final private String database;
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private InfluxDB influxDB;
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InfluxClient(InfluxConfiguration config) {
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this.url = config.url;
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this.username = config.username;
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this.password = config.password;
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this.database = config.database;
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}
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synchronized void login() throws RuntimeException, InterruptedException {
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if(influxDB != null) {
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return;
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}
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boolean connected = false;
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int loginErrors = 0;
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do {
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try {
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log.debug("Connecting to InfluxDB - {}", url);
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influxDB = InfluxDBFactory.connect(url, username, password).setDatabase(database);
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influxDB.version(); // This ensures that we actually try to connect to the db
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influxDB.enableBatch(
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BatchOptions.DEFAULTS
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.threadFactory(runnable -> {
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Thread thread = new Thread(runnable);
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thread.setDaemon(true);
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return thread;
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})
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);
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Runtime.getRuntime().addShutdownHook(new Thread(influxDB::close));
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connected = true;
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} catch(Exception e) {
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sleep(15 * 1000);
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if(loginErrors++ > 3) {
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log.error("login() - error, giving up: {}", e.getMessage());
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throw new RuntimeException(e);
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} else {
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log.warn("login() - error, retrying: {}", e.getMessage());
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}
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}
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} while(!connected);
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}
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synchronized void logoff() {
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if(influxDB != null) {
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influxDB.close();
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}
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influxDB = null;
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}
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public void write(List<Measurement> measurements, Instant timestamp, String measurement) {
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log.debug("write() - measurement: {} {}", measurement, measurements.size());
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processMeasurementMap(measurements, timestamp, measurement).forEach( (point) -> { influxDB.write(point); });
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}
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private List<Point> processMeasurementMap(List<Measurement> measurements, Instant timestamp, String measurement) {
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List<Point> listOfPoints = new ArrayList<>();
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measurements.forEach( (m) -> {
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Point.Builder builder = Point.measurement(measurement)
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.time(timestamp.toEpochMilli(), TimeUnit.MILLISECONDS)
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.tag(m.tags)
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.fields(m.fields);
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listOfPoints.add(builder.build());
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});
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return listOfPoints;
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}
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}
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