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);
@@ -57,20 +59,33 @@ class InfluxClient {
             return;
         }
 
-        try {
-            log.debug("Connecting to InfluxDB - " + url);
-            influxDB = InfluxDBFactory.connect(url, username, password);
-            createDatabase();
+        boolean connected = false;
+        int errors = 0;
 
-            // Enable batch writes to get better performance.
-            BatchOptions options = BatchOptions.DEFAULTS.actions(1000).flushDuration(5000).precision(TimeUnit.SECONDS);
-            influxDB.enableBatch(options);
-            batchPoints = BatchPoints.database(database).precision(TimeUnit.SECONDS).build();
+        do {
+            try {
+                log.debug("Connecting to InfluxDB - " + url);
+                influxDB = InfluxDBFactory.connect(url, username, password);
+                createDatabase();
+
+                // Enable batch writes to get better performance.
+                BatchOptions options = BatchOptions.DEFAULTS.actions(1000).flushDuration(5000).precision(TimeUnit.SECONDS);
+                influxDB.enableBatch(options);
+                batchPoints = BatchPoints.database(database).precision(TimeUnit.SECONDS).build();
+
+                connected = true;
+
+            } catch(Exception e) {
+                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);
 
-        } catch(Exception e) {
-            log.error("login() error - " + e.getMessage());
-            throw new Exception(e);
-        }
     }
 
 

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;
@@ -38,11 +37,10 @@ class Insights {
 
     Insights(Configuration configuration) {
         this.configuration = configuration;
-
         try {
             influxClient = new InfluxClient(configuration.influx);
             influxClient.login();
-        } catch(Exception e) {
+        } catch (Exception e) {
             System.exit(1);
         }