Retry login to InfluxDB.

Bumped version.

README.md

@@ -51,7 +51,16 @@ Below are screenshots of the provided Grafana dashboards (found in the **doc/**
 
 ## Notes
 
-### InfluxDB
+### Start InfluxDB and Grafana at boot on RedHat 7+
+
+    systemctl enable influxdb
+    systemctl start influxdb
+
+    systemctl enable grafana-server
+    systemctl start grafana-server
+
+
+### InfluxDB Retention Policy
 
 Per default the *hmci* influx database has no retention policy, so data will be kept forever. It is recommended to set a retention policy, which is shown below.
 

gradle.properties

@@ -1,3 +1,3 @@
 id            = hmci
 group         = biz.nellemann.hmci
-version       = 0.2.7
+version       = 0.2.8

src/main/java/biz/nellemann/hmci/InfluxClient.java

@@ -30,6 +30,8 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
+import static java.lang.Thread.sleep;
+
 class InfluxClient {
 
     private final static Logger log = LoggerFactory.getLogger(InfluxClient.class);
@@ -57,6 +59,10 @@ class InfluxClient {
             return;
         }
 
+        boolean connected = false;
+        int errors = 0;
+
+        do {
             try {
                 log.debug("Connecting to InfluxDB - " + url);
                 influxDB = InfluxDBFactory.connect(url, username, password);
@@ -67,11 +73,20 @@ class InfluxClient {
                 influxDB.enableBatch(options);
                 batchPoints = BatchPoints.database(database).precision(TimeUnit.SECONDS).build();
 
+                connected = true;
+
             } catch(Exception e) {
-            log.error("login() error - " + e.getMessage());
+                sleep(15*1000);
+                if(errors++ > 3) {
+                    log.error("login() error, giving up - " + e.getMessage());
                     throw new Exception(e);
+                } else {
+                    log.warn("login() error, retrying - " + e.getMessage());
                 }
             }
+        } while(!connected);
+
+    }
 
 
     synchronized void logoff() {

src/main/java/biz/nellemann/hmci/Insights.java

@@ -17,7 +17,6 @@ package biz.nellemann.hmci;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -38,7 +37,6 @@ class Insights {
 
     Insights(Configuration configuration) {
         this.configuration = configuration;
-
         try {
             influxClient = new InfluxClient(configuration.influx);
             influxClient.login();