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Cache a reference to the OS management bean to avoid repeated lookups.

This commit is contained in:
Jon Chambers 2020-08-07 17:32:37 -04:00 committed by Jon Chambers
parent 035693aa30
commit 647a2aea64
2 changed files with 18 additions and 9 deletions
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13
service/src/main/java/org/whispersystems/textsecuregcm/metrics/CpuUsageGauge.java
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@ -6,11 +6,16 @@ import com.sun.management.OperatingSystemMXBean;
import java.lang.management.ManagementFactory; import java.lang.management.ManagementFactory;
public class CpuUsageGauge implements Gauge<Integer> { public class CpuUsageGauge implements Gauge<Integer> {
private final OperatingSystemMXBean operatingSystemMXBean;
public CpuUsageGauge() {
this.operatingSystemMXBean = (com.sun.management.OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
}
@Override @Override
public Integer getValue() { public Integer getValue() {
OperatingSystemMXBean mbean = (com.sun.management.OperatingSystemMXBean) return (int) Math.ceil(operatingSystemMXBean.getSystemCpuLoad() * 100);
ManagementFactory.getOperatingSystemMXBean();
return (int) Math.ceil(mbean.getSystemCpuLoad() * 100);
} }
} }

14
service/src/main/java/org/whispersystems/textsecuregcm/metrics/FreeMemoryGauge.java
View File

@ -7,11 +7,15 @@ import java.lang.management.ManagementFactory;
public class FreeMemoryGauge implements Gauge<Long> { public class FreeMemoryGauge implements Gauge<Long> {
private final OperatingSystemMXBean operatingSystemMXBean;
public FreeMemoryGauge() {
this.operatingSystemMXBean = (com.sun.management.OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
}
@Override @Override
public Long getValue() { public Long getValue() {
OperatingSystemMXBean mbean = (com.sun.management.OperatingSystemMXBean) return operatingSystemMXBean.getFreePhysicalMemorySize();
ManagementFactory.getOperatingSystemMXBean();
return mbean.getFreePhysicalMemorySize();
} }
} }