48 lines
2.0 KiB
Java
48 lines
2.0 KiB
Java
package org.gcube.smartgears.handler.resourceregistry;
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import java.lang.management.ManagementFactory;
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import java.lang.management.OperatingSystemMXBean;
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import javax.management.MBeanServer;
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import javax.management.ObjectName;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class HostingNodeManagerTest {
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private static final Logger logger = LoggerFactory.getLogger(HostingNodeManagerTest.class);
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@Test
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public void compare() throws Exception {
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logger.debug("Runtime.getRuntime().maxMemory() : {}", Runtime.getRuntime().maxMemory());
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logger.debug("Runtime.getRuntime().totalMemory() : {}", Runtime.getRuntime().totalMemory());
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logger.debug("Runtime.getRuntime().freeMemory() : {}", Runtime.getRuntime().freeMemory());
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long allocatedMemory = (Runtime.getRuntime().totalMemory()-Runtime.getRuntime().freeMemory());
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long presumableFreeMemory = Runtime.getRuntime().maxMemory() - allocatedMemory;
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logger.debug("allocatedMemory : {}", allocatedMemory);
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logger.debug("presumableFreeMemory : {}", presumableFreeMemory);
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MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
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Object total = mBeanServer.getAttribute(new ObjectName("java.lang","type","OperatingSystem"), "TotalPhysicalMemorySize");
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logger.debug("Total Memory : {}", total);
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Object free = mBeanServer.getAttribute(new ObjectName("java.lang","type","OperatingSystem"), "FreePhysicalMemorySize");
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logger.debug("Free Memory : {}", free);
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OperatingSystemMXBean mxbean = ManagementFactory.getOperatingSystemMXBean();
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@SuppressWarnings("restriction")
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com.sun.management.OperatingSystemMXBean sunmxbean = (com.sun.management.OperatingSystemMXBean) mxbean;
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@SuppressWarnings("restriction")
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long freeMemory = sunmxbean.getFreePhysicalMemorySize();
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@SuppressWarnings("restriction")
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long totalMemory = sunmxbean.getTotalPhysicalMemorySize();
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logger.debug("freeMemory : {}", freeMemory);
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logger.debug("totalMemory : {}", totalMemory);
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}
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}
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