metrics: fix hostsmetricsresponse for zero cpu, locale (#5329)

* server: Fixed hosts not displaying with incompatible locale (#4900)

Fixes: #4733

* added unit test

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

* eof newline

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Co-authored-by: Spaceman1984 <49917670+Spaceman1984@users.noreply.github.com>

plugins/metrics/src/main/java/org/apache/cloudstack/response/HostMetricsResponse.java

@@ -17,10 +17,14 @@
 
 package org.apache.cloudstack.response;
 
+import java.text.DecimalFormat;
+import java.text.ParseException;
+
 import org.apache.cloudstack.api.response.HostResponse;
 import org.apache.cloudstack.outofbandmanagement.OutOfBandManagement;
 
 import com.cloud.serializer.Param;
+import com.cloud.utils.exception.CloudRuntimeException;
 import com.google.gson.annotations.SerializedName;
 
 public class HostMetricsResponse extends HostResponse {
@@ -118,7 +122,7 @@ public class HostMetricsResponse extends HostResponse {
 
     public void setCpuUsed(final String cpuUsed, final Integer cpuNumber, final Long cpuSpeed) {
         if (cpuUsed != null && cpuNumber != null && cpuSpeed != null) {
-            this.cpuUsed = String.format("%.2f Ghz", Double.valueOf(cpuUsed.replace("%", "")) * cpuNumber * cpuSpeed / (100.0 * 1000.0));
+            this.cpuUsed = String.format("%.2f Ghz", parseCPU(cpuUsed) * cpuNumber * cpuSpeed / (100.0 * 1000.0));
         }
     }
 
@@ -130,10 +134,14 @@ public class HostMetricsResponse extends HostResponse {
 
     public void setCpuAllocated(final String cpuAllocated, final Integer cpuNumber, final Long cpuSpeed) {
         if (cpuAllocated != null && cpuNumber != null && cpuSpeed != null) {
-            this.cpuAllocated = String.format("%.2f Ghz", Double.valueOf(cpuAllocated.replace("%", "")) * cpuNumber * cpuSpeed / (100.0 * 1000.0));
+            this.cpuAllocated = String.format("%.2f Ghz", parseCPU(cpuAllocated) * cpuNumber * cpuSpeed / (100.0 * 1000.0));
         }
     }
 
+    public String getCpuAllocatedGhz() {
+        return cpuAllocated;
+    }
+
     public void setMemTotal(final Long memTotal) {
         if (memTotal != null) {
             this.memTotal = String.format("%.2f GB", memTotal / (1024.0 * 1024.0 * 1024.0));
@@ -166,25 +174,25 @@ public class HostMetricsResponse extends HostResponse {
 
     public void setCpuUsageThreshold(final String cpuUsed, final Double threshold) {
         if (cpuUsed != null && threshold != null) {
-            this.cpuThresholdExceeded = Double.valueOf(cpuUsed.replace("%", "")) > (100.0 * threshold);
+            this.cpuThresholdExceeded = parseCPU(cpuUsed) > (100.0 * threshold);
         }
     }
 
     public void setCpuUsageDisableThreshold(final String cpuUsed, final Float threshold) {
         if (cpuUsed != null && threshold != null) {
-            this.cpuDisableThresholdExceeded = Double.valueOf(cpuUsed.replace("%", "")) > (100.0 * threshold);
+            this.cpuDisableThresholdExceeded = parseCPU(cpuUsed) > (100.0 * threshold);
         }
     }
 
     public void setCpuAllocatedThreshold(final String cpuAllocated, final Double threshold) {
         if (cpuAllocated != null && threshold != null) {
-            this.cpuAllocatedThresholdExceeded = Double.valueOf(cpuAllocated.replace("%", "")) > (100.0 * threshold );
+            this.cpuAllocatedThresholdExceeded = parseCPU(cpuAllocated) > (100.0 * threshold );
         }
     }
 
     public void setCpuAllocatedDisableThreshold(final String cpuAllocated, final Float threshold) {
         if (cpuAllocated != null && threshold != null) {
-            this.cpuAllocatedDisableThresholdExceeded = Double.valueOf(cpuAllocated.replace("%", "")) > (100.0 * threshold);
+            this.cpuAllocatedDisableThresholdExceeded = parseCPU(cpuAllocated) > (100.0 * threshold);
         }
     }
 
@@ -212,4 +220,13 @@ public class HostMetricsResponse extends HostResponse {
         }
     }
 
+    private Double parseCPU(String cpu) {
+        DecimalFormat decimalFormat = new DecimalFormat("#.##");
+        try {
+            return decimalFormat.parse(cpu).doubleValue();
+        } catch (ParseException e) {
+            throw new CloudRuntimeException(e);
+        }
+    }
+
 }

plugins/metrics/src/test/java/org/apache/cloudstack/response/HostMetricsResponseTest.java

@@ -0,0 +1,37 @@
+package org.apache.cloudstack.response;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.cloud.utils.exception.CloudRuntimeException;
+
+public class HostMetricsResponseTest {
+
+    @Test
+    public void testSetCpuAllocatedWithZeroCpu() {
+        final HostMetricsResponse hostResponse = new HostMetricsResponse();
+        hostResponse.setCpuAllocated("50.25%", 0, 1000L);
+        Assert.assertEquals("0.00 Ghz", hostResponse.getCpuAllocatedGhz());
+    }
+
+    @Test
+    public void testSetCpuAllocatedWithInfiniteCpuAllocated() {
+        final HostMetricsResponse hostResponse = new HostMetricsResponse();
+        hostResponse.setCpuAllocated("∞%", 10, 1000L);
+        Assert.assertEquals("Infinity Ghz", hostResponse.getCpuAllocatedGhz());
+    }
+
+    @Test(expected = CloudRuntimeException.class)
+    public void testSetCpuAllocatedWithInvalidCpu() {
+        final HostMetricsResponse hostResponse = new HostMetricsResponse();
+        hostResponse.setCpuAllocated("abc", 10, 1000L);
+    }
+
+    @Test
+    public void testSetCpuAllocatedWithValidCpu() {
+        final HostMetricsResponse hostResponse = new HostMetricsResponse();
+        hostResponse.setCpuAllocated("50.25%", 10, 1000L);
+        Assert.assertEquals("5.03 Ghz", hostResponse.getCpuAllocatedGhz());
+    }
+
+}