Add configuration for monitoring service. (#86)

Author: vjkoskela

src/main/java/com/arpnetworking/clusteraggregator/GuiceModule.java

@@ -152,7 +152,7 @@ private MetricsFactory provideMetricsFactory() {
 
         return new TsdMetricsFactory.Builder()
                 .setClusterName(_configuration.getMonitoringCluster())
-                .setServiceName("cluster_aggregator")
+                .setServiceName(_configuration.getMonitoringService())
                 .setSinks(Collections.singletonList(sink))
                 .build();
     }

src/main/java/com/arpnetworking/clusteraggregator/configuration/ClusterAggregatorConfiguration.java

@@ -49,6 +49,10 @@ public String getMonitoringCluster() {
         return _monitoringCluster;
     }
 
+    public String getMonitoringService() {
+        return _monitoringService;
+    }
+
     public int getHttpPort() {
         return _httpPort;
     }
@@ -130,6 +134,7 @@ public String toString() {
         return MoreObjects.toStringHelper(this)
                 .add("id", Integer.toHexString(System.identityHashCode(this)))
                 .add("MonitoringCluster", _monitoringCluster)
+                .add("MonitoringService", _monitoringService)
                 .add("HttpHost", _httpHost)
                 .add("HttpPort", _httpPort)
                 .add("HttpHealthCheckPath", _httpHealthCheckPath)
@@ -153,6 +158,7 @@ public String toString() {
 
     private ClusterAggregatorConfiguration(final Builder builder) {
         _monitoringCluster = builder._monitoringCluster;
+        _monitoringService = builder._monitoringService;
         _httpHost = builder._httpHost;
         _httpPort = builder._httpPort;
         _httpHealthCheckPath = builder._httpHealthCheckPath;
@@ -175,6 +181,7 @@ private ClusterAggregatorConfiguration(final Builder builder) {
     }
 
     private final String _monitoringCluster;
+    private final String _monitoringService;
     private final File _logDirectory;
     private final String _httpHost;
     private final int _httpPort;
@@ -219,6 +226,18 @@ public Builder setMonitoringCluster(final String value) {
             return this;
         }
 
+        /**
+         * The monitoring service. Optional. Cannot be null or empty. Default
+         * is cluster_aggregator.
+         *
+         * @param value The monitoring service.
+         * @return This instance of <code>Builder</code>.
+         */
+        public Builder setMonitoringService(final String value) {
+            _monitoringService = value;
+            return this;
+        }
+
         /**
          * The http host address to bind to. Cannot be null or empty.
          *
@@ -446,6 +465,9 @@ public Builder setCalculateClusterAggregations(final Boolean value) {
         private String _monitoringCluster;
         @NotNull
         @NotEmpty
+        private String _monitoringService = "cluster_aggregator";
+        @NotNull
+        @NotEmpty
         private String _httpHost = "0.0.0.0";
         @NotNull
         @Range(min = 1, max = 65535)