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Java Source Code / Java Documentation » 6.0 JDK Modules sun » jvmstat » sun.jvmstat.perfdata.monitor.v1_0

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Class Diagram

Java Document (Java Doc)

java.lang .Object

sun.jvmstat.perfdata.monitor .AbstractPerfDataBufferPrologue

sun.jvmstat.perfdata.monitor.v1_0 .PerfDataBufferPrologue

PerfDataBufferPrologue

public class PerfDataBufferPrologue extends AbstractPerfDataBufferPrologue (Code)

Class representing the 1.0 version of the HotSpot PerfData instrumentation buffer header.

The PerfDataBufferPrologue2_0 class supports parsing of the version specific portions of the PerfDataPrologue C structure:

 typedef struct {
 ...                      // handled by superclass
 jint used;               // number of PerfData memory bytes used
 jint overflow;           // number of bytes of overflow
 jlong mod_time_stamp;    // time stamp of the last structural modification
 } PerfDataPrologue

author:
   Brian Doherty
version:
   1.8, 05/05/07
since:
   1.5

Field Summary
final static String	PERFDATA_BUFFER_SIZE_NAME
final static String	PERFDATA_BUFFER_USED_NAME
final static String	PERFDATA_MODTIMESTAMP_NAME
final static String	PERFDATA_OVERFLOW_NAME
final static int	PERFDATA_PROLOG_MODTIMESTAMP_OFFSET
final static int	PERFDATA_PROLOG_MODTIMESTAMP_SIZE
final static int	PERFDATA_PROLOG_OVERFLOW_OFFSET
final static int	PERFDATA_PROLOG_OVERFLOW_SIZE
final static int	PERFDATA_PROLOG_SIZE
final static int	PERFDATA_PROLOG_USED_OFFSET
final static int	PERFDATA_PROLOG_USED_SIZE

Constructor Summary
public	PerfDataBufferPrologue(ByteBuffer byteBuffer) Create an instance of PerfDataBufferPrologue from the given ByteBuffer object.

Method Summary
public int	getBufferSize() Get the size of the instrumentation memory buffer.
public long	getModificationTimeStamp() Get the time of last modification for the instrumentation memory buffer.
public int	getOverflow() Get the buffer overflow amount.
public int	getSize()
public int	getUsed() Get the utilization of the instrumentation memory buffer.
public boolean	isAccessible()
public LongBuffer	modificationTimeStampBuffer() Return an LongBuffer that accesses the modification timestamp value.
public IntBuffer	overflowBuffer() Return an IntBuffer that accesses the overflow value.
public IntBuffer	sizeBuffer() Return an IntBuffer that accesses the size value.
public boolean	supportsAccessible()
public IntBuffer	usedBuffer() Return an IntBuffer that accesses the used value.

Field Detail

PERFDATA_BUFFER_SIZE_NAME
final static String PERFDATA_BUFFER_SIZE_NAME(Code)

PERFDATA_BUFFER_USED_NAME
final static String PERFDATA_BUFFER_USED_NAME(Code)

PERFDATA_MODTIMESTAMP_NAME
final static String PERFDATA_MODTIMESTAMP_NAME(Code)

PERFDATA_OVERFLOW_NAME
final static String PERFDATA_OVERFLOW_NAME(Code)

PERFDATA_PROLOG_MODTIMESTAMP_OFFSET
final static int PERFDATA_PROLOG_MODTIMESTAMP_OFFSET(Code)

PERFDATA_PROLOG_MODTIMESTAMP_SIZE
final static int PERFDATA_PROLOG_MODTIMESTAMP_SIZE(Code)

PERFDATA_PROLOG_OVERFLOW_OFFSET
final static int PERFDATA_PROLOG_OVERFLOW_OFFSET(Code)

PERFDATA_PROLOG_OVERFLOW_SIZE
final static int PERFDATA_PROLOG_OVERFLOW_SIZE(Code)

PERFDATA_PROLOG_SIZE
final static int PERFDATA_PROLOG_SIZE(Code)

PERFDATA_PROLOG_USED_OFFSET
final static int PERFDATA_PROLOG_USED_OFFSET(Code)

PERFDATA_PROLOG_USED_SIZE
final static int PERFDATA_PROLOG_USED_SIZE(Code)

Constructor Detail

PerfDataBufferPrologue
public PerfDataBufferPrologue(ByteBuffer byteBuffer) throws MonitorException(Code)
	Create an instance of PerfDataBufferPrologue from the given ByteBuffer object. Parameters: byteBuffer - the buffer containing the binary header data

Method Detail

getBufferSize
public int getBufferSize()(Code)
	Get the size of the instrumentation memory buffer. int - the size of the buffer

getModificationTimeStamp
public long getModificationTimeStamp()(Code)
	Get the time of last modification for the instrumentation memory buffer. This method returns the time, as ticks since the start of the target JVM, of the last structural modification to the instrumentation buffer. Structural modifications correspond to the addition or deletion of instrumentation objects. Updates to counter values are not structural modifications.

getOverflow
public int getOverflow()(Code)
	Get the buffer overflow amount. This value is non-zero if the HotSpot JVM has overflowed the instrumentation memory buffer. The target JVM can be restarted with -XX:PerfDataMemSize=X to create a larger memory buffer. int - the size of the buffer

getSize
public int getSize()(Code)

getUsed
public int getUsed()(Code)
	Get the utilization of the instrumentation memory buffer. int - the utilization of the buffer

isAccessible
public boolean isAccessible()(Code)

modificationTimeStampBuffer
public LongBuffer modificationTimeStampBuffer()(Code)
	Return an LongBuffer that accesses the modification timestamp value. This is used* to create a Monitor object for this value. LongBuffer - a ByteBuffer that accesses the modification timestamp value in the instrumentation buffer header. See Also: PerfDataBufferPrologue.getModificationTimeStamp()

overflowBuffer
public IntBuffer overflowBuffer()(Code)
	Return an IntBuffer that accesses the overflow value. This is used to create a Monitor object for this value. IntBuffer - a ByteBuffer that accesses the overflow valuein the instrumentation buffer header. See Also: PerfDataBufferPrologue.getOverflow()

sizeBuffer
public IntBuffer sizeBuffer()(Code)
	Return an IntBuffer that accesses the size value. This is used to create a Monitor object for this value. IntBuffer - a ByteBuffer that accesses the size valuein the instrumentation buffer header. See Also: PerfDataBufferPrologue.getBufferSize()

supportsAccessible
public boolean supportsAccessible()(Code)

usedBuffer
public IntBuffer usedBuffer()(Code)
	Return an IntBuffer that accesses the used value. This is used to create a Monitor object for this value. IntBuffer - a ByteBuffer that accesses the used valuein the instrumentation buffer header. See Also: PerfDataBufferPrologue.getUsed()

Fields inherited from sun.jvmstat.perfdata.monitor.AbstractPerfDataBufferPrologue

final public static String PERFDATA_MAJOR_NAME(Code)(Java Doc)
final public static String PERFDATA_MINOR_NAME(Code)(Java Doc)
protected ByteBuffer byteBuffer(Code)(Java Doc)

Methods inherited from sun.jvmstat.perfdata.monitor.AbstractPerfDataBufferPrologue

public ByteOrder getByteOrder()(Code)(Java Doc)
public static ByteOrder getByteOrder(ByteBuffer bb)(Code)(Java Doc)
public int getMagic()(Code)(Java Doc)
public static int getMagic(ByteBuffer bb)(Code)(Java Doc)
public int getMajorVersion()(Code)(Java Doc)
public static int getMajorVersion(ByteBuffer bb)(Code)(Java Doc)
public int getMinorVersion()(Code)(Java Doc)
public static int getMinorVersion(ByteBuffer bb)(Code)(Java Doc)
public int getSize()(Code)(Java Doc)
abstract public boolean isAccessible()(Code)(Java Doc)
public IntBuffer majorVersionBuffer()(Code)(Java Doc)
public IntBuffer minorVersionBuffer()(Code)(Java Doc)
abstract public boolean supportsAccessible()(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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