dashboard: Filter internal virtual resources in MetricFetcher

- also fix pom.xml to suppress warnings

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-dashboard/pom.xml

@@ -139,6 +139,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring.boot.version}</version>
                 <configuration>
                     <fork>true</fork>
                     <mainClass>com.alibaba.csp.sentinel.dashboard.DashboardApplication</mainClass>

sentinel-dashboard/src/main/java/com/alibaba/csp/sentinel/dashboard/metric/MetricFetcher.java

@@ -19,6 +19,7 @@ import java.net.ConnectException;
 import java.net.SocketTimeoutException;
 import java.nio.charset.Charset;
 import java.util.Date;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -34,6 +35,7 @@ import java.util.concurrent.ThreadPoolExecutor.DiscardPolicy;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 
+import com.alibaba.csp.sentinel.Constants;
 import com.alibaba.csp.sentinel.concurrent.NamedThreadFactory;
 import com.alibaba.csp.sentinel.config.SentinelConfig;
 import com.alibaba.csp.sentinel.dashboard.datasource.entity.MetricEntity;
@@ -322,7 +324,10 @@ public class MetricFetcher {
         for (String line : lines) {
             try {
                 MetricNode node = MetricNode.fromThinString(line);
-                /**
+                if (shouldFilterOut(node.getResource())) {
+                    continue;
+                }
+                /*
                  * aggregation metrics by app_resource_timeSecond, ignore ip and port.
                  */
                 String key = buildMetricKey(machine.getApp(), node.getResource(), node.getTimestamp());
@@ -355,6 +360,16 @@ public class MetricFetcher {
         return app + "__" + resource + "__" + (timestamp / 1000);
     }
 
+    private boolean shouldFilterOut(String resource) {
+        return RES_EXCLUSION_SET.contains(resource);
+    }
+
+    private static final Set<String> RES_EXCLUSION_SET = new HashSet<String>() {{
+       add(Constants.TOTAL_IN_RESOURCE_NAME);
+       add(Constants.SYSTEM_LOAD_RESOURCE_NAME);
+       add(Constants.CPU_USAGE_RESOURCE_NAME);
+    }};
+
 }