private void checkMemory(RoutingContext routingContext) {
OperatingSystemMXBean bean =
(OperatingSystemMXBean) ManagementFactoryHelper.getOperatingSystemMXBean();
long max = bean.getTotalPhysicalMemorySize();
long free = bean.getFreePhysicalMemorySize();
routingContext
.response()
.putHeader("Content-Type", "text/plain")
.setStatusCode(HttpResponseStatus.OK.code())
.end(String.valueOf(max - free));
}
/**
* Returns a list of {@link GarbageCollectorMXBean} objects in the Java virtual machine. The Java
* virtual machine may have one or more <tt>GarbageCollectorMXBean</tt> objects. It may add or
* remove <tt>GarbageCollectorMXBean</tt> during execution.
*
* @return a list of <tt>GarbageCollectorMXBean</tt> objects.
*/
public static List<GarbageCollectorMXBean> getGarbageCollectorMXBeans() {
return ManagementFactoryHelper.getGarbageCollectorMXBeans();
}
/**
* Returns a list of {@link MemoryManagerMXBean} objects in the Java virtual machine. The Java
* virtual machine can have one or more memory managers. It may add or remove memory managers
* during execution.
*
* @return a list of <tt>MemoryManagerMXBean</tt> objects.
*/
public static List<MemoryManagerMXBean> getMemoryManagerMXBeans() {
return ManagementFactoryHelper.getMemoryManagerMXBeans();
}
/**
* Returns the managed bean for the operating system on which the Java virtual machine is running.
*
* @return an {@link OperatingSystemMXBean} object for the Java virtual machine.
*/
public static OperatingSystemMXBean getOperatingSystemMXBean() {
return ManagementFactoryHelper.getOperatingSystemMXBean();
}
/**
* Returns the managed bean for the compilation system of the Java virtual machine. This method
* returns <tt>null</tt> if the Java virtual machine has no compilation system.
*
* @return a {@link CompilationMXBean} object for the Java virtual machine or <tt>null</tt> if the
* Java virtual machine has no compilation system.
*/
public static CompilationMXBean getCompilationMXBean() {
return ManagementFactoryHelper.getCompilationMXBean();
}
/**
* Returns the managed bean for the runtime system of the Java virtual machine.
*
* @return a {@link RuntimeMXBean} object for the Java virtual machine.
*/
public static RuntimeMXBean getRuntimeMXBean() {
return ManagementFactoryHelper.getRuntimeMXBean();
}
/**
* Returns the managed bean for the thread system of the Java virtual machine.
*
* @return a {@link ThreadMXBean} object for the Java virtual machine.
*/
public static ThreadMXBean getThreadMXBean() {
return ManagementFactoryHelper.getThreadMXBean();
}
/**
* Returns the managed bean for the memory system of the Java virtual machine.
*
* @return a {@link MemoryMXBean} object for the Java virtual machine.
*/
public static MemoryMXBean getMemoryMXBean() {
return ManagementFactoryHelper.getMemoryMXBean();
}
/**
* Returns the managed bean for the class loading system of the Java virtual machine.
*
* @return a {@link ClassLoadingMXBean} object for the Java virtual machine.
*/
public static ClassLoadingMXBean getClassLoadingMXBean() {
return ManagementFactoryHelper.getClassLoadingMXBean();
}
public class GetTotalSafepointTime {
private static HotspotRuntimeMBean mbean =
(HotspotRuntimeMBean) ManagementFactoryHelper.getHotspotRuntimeMBean();
private static final long NUM_THREAD_DUMPS = 100;
// Careful with these values.
private static final long MIN_VALUE_FOR_PASS = 1;
private static final long MAX_VALUE_FOR_PASS = Long.MAX_VALUE;
private static boolean trace = false;
public static void main(String args[]) throws Exception {
if (args.length > 0 && args[0].equals("trace")) {
trace = true;
}
// Thread.getAllStackTraces() should cause safepoints.
// If this test is failing because it doesn't,
// MIN_VALUE_FOR_PASS should be reset to 0
for (int i = 0; i < NUM_THREAD_DUMPS; i++) {
Thread.getAllStackTraces();
}
long value = mbean.getTotalSafepointTime();
if (trace) {
System.out.println("Total safepoint time (ms): " + value);
}
if (value < MIN_VALUE_FOR_PASS || value > MAX_VALUE_FOR_PASS) {
throw new RuntimeException(
"Total safepoint time "
+ "illegal value: "
+ value
+ " ms "
+ "(MIN = "
+ MIN_VALUE_FOR_PASS
+ "; "
+ "MAX = "
+ MAX_VALUE_FOR_PASS
+ ")");
}
for (int i = 0; i < 2 * NUM_THREAD_DUMPS; i++) {
Thread.getAllStackTraces();
}
long value2 = mbean.getTotalSafepointTime();
if (trace) {
System.out.println("Total safepoint time2 (ms): " + value2);
}
if (value2 <= value) {
throw new RuntimeException(
"Total safepoint time "
+ "did not increase "
+ "(value = "
+ value
+ "; "
+ "value2 = "
+ value2
+ ")");
}
System.out.println("Test passed.");
}
}