ehcache-core 2.10.9.2 · net.sf.ehcache.pool.sizeof.JvmInformation

Field Summary

Modifier and Type	Field and Description
public static final JvmInformation	CURRENT_JVM_INFORMATION The JvmInformation instance representing the current JVM
private static final long	FIFTY_SEVEN_GB
public static final JvmInformation	HOTSPOT_32_BIT Represents HotSpot 32-bit
public static final JvmInformation	HOTSPOT_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 32-Bit HotSpot JVM with Concurrent Mark-and-Sweep GC
public static final JvmInformation	HOTSPOT_64_BIT Represents 64-Bit HotSpot JVM
public static final JvmInformation	HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS Represents 64-Bit HotSpot JVM with Compressed OOPs
public static final JvmInformation	HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit HotSpot JVM with Compressed OOPs and Concurrent Mark-and-Sweep GC
public static final JvmInformation	HOTSPOT_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit HotSpot JVM with Concurrent Mark-and-Sweep GC
public static final JvmInformation	IBM_32_BIT Represents IBM 32-bit
public static final JvmInformation	IBM_64_BIT Represents 64-Bit IBM JVM (with no reference compression)
public static final JvmInformation	IBM_64_BIT_WITH_COMPRESSED_REFS Represents 64-Bit IBM JVM (with reference compression)
private static final Logger	LOGGER
public static final JvmInformation	OPENJDK_32_BIT Represents OpenJDK 32-bit
public static final JvmInformation	OPENJDK_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 32-Bit OpenJDK JVM with Concurrent Mark-and-Sweep GC
public static final JvmInformation	OPENJDK_64_BIT Represents 64-Bit OpenJDK JVM
public static final JvmInformation	OPENJDK_64_BIT_WITH_COMPRESSED_OOPS Represents 64-Bit OpenJDK JVM with Compressed OOPs
public static final JvmInformation	OPENJDK_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit OpenJDK JVM with Compressed OOPs and Concurrent Mark-and-Sweep GC
public static final JvmInformation	OPENJDK_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit OpenJDK JVM with Concurrent Mark-and-Sweep GC
private JvmInformation	parent
private static final long	TWENTY_FIVE_GB
public static final JvmInformation	UNKNOWN_32_BIT Represents Generic 32-bit
public static final JvmInformation	UNKNOWN_64_BIT Represents 64-Bit Generic JVM

Constructor Summary

Access	Constructor and Description
private	JvmInformation(JvmInformation parent)

Method Summary

Modifier and Type	Method and Description
private static JvmInformation	detectHotSpot()
private static JvmInformation	detectIBM()
private static JvmInformation	detectOpenJDK()
public int	getAgentSizeOfAdjustment() The size of the jvm-specific agent result adjustment in bytes.
public int	getFieldOffsetAdjustment() The size of the jvm-specific field offset adjustment in bytes.
private static String	getHotSpotVmOptionValue(String name)
public int	getJavaPointerSize() Size of a java pointer in bytes on this runtime (that differs when compressedOops are being used)
public abstract String	getJvmDescription() A human-readable description of the JVM and its relevant enabled options.Os
private static JvmInformation	getJvmInformation() Determine the JvmInformation for the current JVM.
public int	getMinimumObjectSize() Minimal size an object will occupy on the heap in bytes.
public int	getObjectAlignment() Object alignment / padding in bytes
public int	getObjectHeaderSize() The size of an object header in bytes.
private static String	getPlatformMBeanAttribute(String beanName, String attrName)
public int	getPointerSize() Size of a pointer in bytes on this runtime
private static boolean	is64Bit()
public static boolean	Returns: true, if Hotspot isHotspot() Returns true if VM vendor is Hotspot
private static boolean	isHotspotCompressedOops()
private static boolean	isHotspotConcurrentMarkSweepGC()
public static boolean	Returns: true, if IBM isIBM() Returns true if VM vendor is IBM
private static boolean	isIBMCompressedRefs()
public static boolean	Returns: true, if OpenJDK isOpenJDK() Returns true if VM vendor is OpenJDK
public static boolean	Returns: true, if OS X isOSX() Return true if the VM's vendor is Apple
public boolean	supportsAgentSizeOf() Whether the jvm can support AgentSizeOf implementation.
public boolean	supportsReflectionSizeOf() Whether the jvm can support ReflectionSizeOf implementation.
public boolean	supportsUnsafeSizeOf() Whether the jvm can support UnsafeSizeOf implementation.
public static JvmInformation	valueOf(String name)
public static JvmInformation[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

CURRENT_JVM_INFORMATION	back to summary
public static final JvmInformation CURRENT_JVM_INFORMATION The JvmInformation instance representing the current JVM

FIFTY_SEVEN_GB	back to summary
private static final long FIFTY_SEVEN_GB

HOTSPOT_32_BIT	back to summary
public static final JvmInformation HOTSPOT_32_BIT Represents HotSpot 32-bit

HOTSPOT_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation HOTSPOT_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 32-Bit HotSpot JVM with Concurrent Mark-and-Sweep GC

HOTSPOT_64_BIT	back to summary
public static final JvmInformation HOTSPOT_64_BIT Represents 64-Bit HotSpot JVM

HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS	back to summary
public static final JvmInformation HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS Represents 64-Bit HotSpot JVM with Compressed OOPs

HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation HOTSPOT_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit HotSpot JVM with Compressed OOPs and Concurrent Mark-and-Sweep GC

HOTSPOT_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation HOTSPOT_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit HotSpot JVM with Concurrent Mark-and-Sweep GC

IBM_32_BIT	back to summary
public static final JvmInformation IBM_32_BIT Represents IBM 32-bit

IBM_64_BIT	back to summary
public static final JvmInformation IBM_64_BIT Represents 64-Bit IBM JVM (with no reference compression)

IBM_64_BIT_WITH_COMPRESSED_REFS	back to summary
public static final JvmInformation IBM_64_BIT_WITH_COMPRESSED_REFS Represents 64-Bit IBM JVM (with reference compression)

LOGGER	back to summary
private static final Logger LOGGER

OPENJDK_32_BIT	back to summary
public static final JvmInformation OPENJDK_32_BIT Represents OpenJDK 32-bit

OPENJDK_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation OPENJDK_32_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 32-Bit OpenJDK JVM with Concurrent Mark-and-Sweep GC

OPENJDK_64_BIT	back to summary
public static final JvmInformation OPENJDK_64_BIT Represents 64-Bit OpenJDK JVM

OPENJDK_64_BIT_WITH_COMPRESSED_OOPS	back to summary
public static final JvmInformation OPENJDK_64_BIT_WITH_COMPRESSED_OOPS Represents 64-Bit OpenJDK JVM with Compressed OOPs

OPENJDK_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation OPENJDK_64_BIT_WITH_COMPRESSED_OOPS_AND_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit OpenJDK JVM with Compressed OOPs and Concurrent Mark-and-Sweep GC

OPENJDK_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP	back to summary
public static final JvmInformation OPENJDK_64_BIT_WITH_CONCURRENT_MARK_AND_SWEEP Represents 64-Bit OpenJDK JVM with Concurrent Mark-and-Sweep GC

parent	back to summary
private JvmInformation parent

TWENTY_FIVE_GB	back to summary
private static final long TWENTY_FIVE_GB

UNKNOWN_32_BIT	back to summary
public static final JvmInformation UNKNOWN_32_BIT Represents Generic 32-bit

UNKNOWN_64_BIT	back to summary
public static final JvmInformation UNKNOWN_64_BIT Represents 64-Bit Generic JVM

Constructor Detail

JvmInformation	back to summary
private JvmInformation(JvmInformation parent)

Method Detail

detectHotSpot	back to summary
private static JvmInformation detectHotSpot()

detectIBM	back to summary
private static JvmInformation detectIBM()

detectOpenJDK	back to summary
private static JvmInformation detectOpenJDK()

getAgentSizeOfAdjustment	back to summary
public int getAgentSizeOfAdjustment() The size of the jvm-specific agent result adjustment in bytes.

getFieldOffsetAdjustment	back to summary
public int getFieldOffsetAdjustment() The size of the jvm-specific field offset adjustment in bytes.

getHotSpotVmOptionValue	back to summary
private static String getHotSpotVmOptionValue(String name)

getJavaPointerSize	back to summary
public int getJavaPointerSize() Size of a java pointer in bytes on this runtime (that differs when compressedOops are being used)

getJvmDescription	back to summary
public abstract String getJvmDescription() A human-readable description of the JVM and its relevant enabled options.Os

getJvmInformation	back to summary
private static JvmInformation getJvmInformation() Determine the JvmInformation for the current JVM.

getMinimumObjectSize	back to summary
public int getMinimumObjectSize() Minimal size an object will occupy on the heap in bytes.

getObjectAlignment	back to summary
public int getObjectAlignment() Object alignment / padding in bytes

getObjectHeaderSize	back to summary
public int getObjectHeaderSize() The size of an object header in bytes.

getPlatformMBeanAttribute	back to summary
private static String getPlatformMBeanAttribute(String beanName, String attrName)

getPointerSize	back to summary
public int getPointerSize() Size of a pointer in bytes on this runtime

is64Bit	back to summary
private static boolean is64Bit()

isHotspot	back to summary
public static boolean isHotspot() Returns true if VM vendor is Hotspot Returns:boolean true, if Hotspot

isHotspot

back to summary

public static boolean isHotspot()

Returns true if VM vendor is Hotspot

Returns:boolean: true, if Hotspot

isHotspotCompressedOops	back to summary
private static boolean isHotspotCompressedOops()

isHotspotConcurrentMarkSweepGC	back to summary
private static boolean isHotspotConcurrentMarkSweepGC()

isIBM	back to summary
public static boolean isIBM() Returns true if VM vendor is IBM Returns:boolean true, if IBM

isIBM

back to summary

public static boolean isIBM()

Returns true if VM vendor is IBM

Returns:boolean: true, if IBM

isIBMCompressedRefs	back to summary
private static boolean isIBMCompressedRefs()

isOpenJDK	back to summary
public static boolean isOpenJDK() Returns true if VM vendor is OpenJDK Returns:boolean true, if OpenJDK

isOpenJDK

back to summary

public static boolean isOpenJDK()

Returns true if VM vendor is OpenJDK

Returns:boolean: true, if OpenJDK

isOSX	back to summary
public static boolean isOSX() Return true if the VM's vendor is Apple Returns:boolean true, if OS X

isOSX

back to summary

public static boolean isOSX()

Return true if the VM's vendor is Apple

Returns:boolean: true, if OS X

supportsAgentSizeOf	back to summary
public boolean supportsAgentSizeOf() Whether the jvm can support AgentSizeOf implementation.

supportsReflectionSizeOf	back to summary
public boolean supportsReflectionSizeOf() Whether the jvm can support ReflectionSizeOf implementation.

supportsUnsafeSizeOf	back to summary
public boolean supportsUnsafeSizeOf() Whether the jvm can support UnsafeSizeOf implementation.

valueOf	back to summary
public static JvmInformation valueOf(String name)

values	back to summary
public static JvmInformation[] values()

public sealed Enum JvmInformation

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail