修改2.0.x 版本metrics节点null指针问题

Author: homeant

moss-client/moss-client-2.x/src/main/java/org/xujin/moss/client/endpoint/MossMetricsEndpoint.java

@@ -53,19 +53,18 @@ public HaloMetricResponse HaloMetric() {
         haloMetricResponse.setJvmMemoryUsedHeap(String.valueOf(jvmNemoryUsedHeap.getMeasurements().get(0).getValue()));
         MetricResponse jvmNemoryUsedNonHeap=metric("jvm.memory.used", Arrays.asList("area:nonheap") );
         haloMetricResponse.setJvmMemoryUsedNonHeap(String.valueOf(jvmNemoryUsedNonHeap.getMeasurements().get(0).getValue()));
-
+        // 2.0 actuator/metrics 中没有这个key
         MetricResponse systemLoadAverage=metric("system.load.average.1m", null );
-        haloMetricResponse.setSystemloadAverage(String.valueOf(systemLoadAverage.getMeasurements().get(0).getValue()));
-
+        if(systemLoadAverage!=null){
+            haloMetricResponse.setSystemloadAverage(String.valueOf(systemLoadAverage.getMeasurements().get(0).getValue()));
+        }
         MetricResponse heapCommitted=metric("jvm.memory.committed", Arrays.asList("area:heap") );
         haloMetricResponse.setHeapCommitted(String.valueOf(heapCommitted.getMeasurements().get(0).getValue()));
         MetricResponse nonheapCommitted=metric("jvm.memory.committed", Arrays.asList("area:nonheap") );
         haloMetricResponse.setNonheapCommitted(String.valueOf(nonheapCommitted.getMeasurements().get(0).getValue()));
 
         MetricResponse heapMax=metric("jvm.memory.max", Arrays.asList("area:heap") );
         haloMetricResponse.setHeapMax(String.valueOf(heapMax.getMeasurements().get(0).getValue()));
-
-
         getGcinfo(haloMetricResponse);
         MemoryUsage memoryUsage = ManagementFactory.getMemoryMXBean()
                 .getHeapMemoryUsage();