server: use latest InfluxDB (2.15), add support to Batch Mode (#3289)

The InfluxDB Java client supports Batch Mode at versions 2.9+ [1]. Thus, this PR updated to the latest InfluxDB (2.15), adding support to Batch Mode

[1] https://github.com/influxdata/influxdb-java

Author: Gabriel Beims Bräscher

pom.xml

@@ -130,6 +130,7 @@
         <cs.guava.version>23.6-jre</cs.guava.version>
         <cs.httpclient.version>4.5.4</cs.httpclient.version>
         <cs.httpcore.version>4.4.8</cs.httpcore.version>
+        <cs.influxdb-java.version>2.15</cs.influxdb-java.version>
         <cs.jackson.version>2.9.2</cs.jackson.version>
         <cs.jasypt.version>1.9.2</cs.jasypt.version>
         <cs.java-ipv6.version>0.16</cs.java-ipv6.version>
@@ -524,6 +525,11 @@
                 <artifactId>groovy-all</artifactId>
                 <version>${cs.groovy.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.influxdb</groupId>
+                <artifactId>influxdb-java</artifactId>
+                <version>${cs.influxdb-java.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.eclipse.jetty</groupId>
                 <artifactId>jetty-jmx</artifactId>

server/pom.xml

@@ -160,7 +160,6 @@
         <dependency>
             <groupId>org.influxdb</groupId>
             <artifactId>influxdb-java</artifactId>
-            <version>2.8</version>
         </dependency>
     </dependencies>
     <build>

server/src/main/java/com/cloud/server/StatsCollector.java

@@ -51,6 +51,7 @@
 import org.apache.commons.collections.MapUtils;
 import org.apache.commons.lang.StringUtils;
 import org.apache.log4j.Logger;
+import org.influxdb.BatchOptions;
 import org.influxdb.InfluxDB;
 import org.influxdb.InfluxDBFactory;
 import org.influxdb.dto.BatchPoints;
@@ -1502,6 +1503,7 @@ protected InfluxDB createInfluxDbConnection() {
      */
     protected void writeBatches(InfluxDB influxDbConnection, String dbName, List<Point> points) {
         BatchPoints batchPoints = BatchPoints.database(dbName).build();
+        influxDbConnection.enableBatch(BatchOptions.DEFAULTS);
 
         for (Point point : points) {
             batchPoints.point(point);