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

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Class Diagram

Java Document (Java Doc)

java.lang .Object

sun.jvmstat.perfdata.monitor .AbstractPerfDataBufferPrologue

All known Subclasses:   sun.jvmstat.perfdata.monitor.v2_0 .PerfDataBufferPrologue,  sun.jvmstat.perfdata.monitor.v1_0 .PerfDataBufferPrologue,
AbstractPerfDataBufferPrologue
abstract public class AbstractPerfDataBufferPrologue (Code)
Abstraction representing the HotSpot PerfData instrumentation buffer header. This class represents only the fixed portion of the header. Version specific classes represent the portion of the header that may change from release to release.
The PerfDataBufferProlog class supports parsing of the following C structure:
typedef struct { jint magic; // magic number - 0xcafec0c0 jbyte byte_order; // byte order of the buffer jbyte major_version; // major and minor version numbers jbyte minor_version; jbyte reserved_byte1; // reserved - see concrete implementations for // possible definition. ... // remainder is handled by the subclasses. } PerfDataPrologue

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

Field Summary
final static byte PERFDATA_BIG_ENDIAN

final static byte PERFDATA_LITTLE_ENDIAN

final static int PERFDATA_MAGIC

final public static String PERFDATA_MAJOR_NAME

final public static String PERFDATA_MINOR_NAME

final static int PERFDATA_PROLOG_BYTEORDER_OFFSET

final static int PERFDATA_PROLOG_BYTEORDER_SIZE

final static int PERFDATA_PROLOG_MAGIC_OFFSET

final static int PERFDATA_PROLOG_MAJOR_OFFSET

final static int PERFDATA_PROLOG_MAJOR_SIZE

final static int PERFDATA_PROLOG_MINOR_OFFSET

final static int PERFDATA_PROLOG_MINOR_SIZE

final static int PERFDATA_PROLOG_OFFSET

final static int PERFDATA_PROLOG_RESERVEDB1_OFFSET

final static int PERFDATA_PROLOG_RESERVEDB1_SIZE

final static int PERFDATA_PROLOG_SIZE

protected ByteBuffer byteBuffer


Constructor Summary
public AbstractPerfDataBufferPrologue(ByteBuffer byteBuffer)
     Construct a PerfDataBufferPrologue instance.

Method Summary
public ByteOrder getByteOrder()
     Get the byte order.
public static ByteOrder getByteOrder(ByteBuffer bb)
     Get the byte order for the given ByteBuffer.
public int getMagic()
     Get the magic number.
public static int getMagic(ByteBuffer bb)
     Get the magic number from the given byteBuffer.
public int getMajorVersion()
     Get the major version.
public static int getMajorVersion(ByteBuffer bb)
     Get the major version number from the given ByteBuffer.
public int getMinorVersion()
     Get the minor version.
public static int getMinorVersion(ByteBuffer bb)
     Get the minor version number from the given ByteBuffer.
public int getSize()
     Get the size of the header portion of the instrumentation buffer.
abstract public boolean isAccessible()
     Get the accessible flag.
public IntBuffer majorVersionBuffer()
     Return an IntBuffer that accesses the major version number.
public IntBuffer minorVersionBuffer()
     Return an IntBuffer that accesses the minor version number.
abstract public boolean supportsAccessible()
     Test if the accessible flag is supported by this version of the PerfDataBufferPrologue.

Field Detail
PERFDATA_BIG_ENDIAN
final static byte PERFDATA_BIG_ENDIAN(Code)

PERFDATA_LITTLE_ENDIAN
final static byte PERFDATA_LITTLE_ENDIAN(Code)

PERFDATA_MAGIC
final static int PERFDATA_MAGIC(Code)

PERFDATA_MAJOR_NAME
final public static String PERFDATA_MAJOR_NAME(Code)

PERFDATA_MINOR_NAME
final public static String PERFDATA_MINOR_NAME(Code)

PERFDATA_PROLOG_BYTEORDER_OFFSET
final static int PERFDATA_PROLOG_BYTEORDER_OFFSET(Code)

PERFDATA_PROLOG_BYTEORDER_SIZE
final static int PERFDATA_PROLOG_BYTEORDER_SIZE(Code)

PERFDATA_PROLOG_MAGIC_OFFSET
final static int PERFDATA_PROLOG_MAGIC_OFFSET(Code)

PERFDATA_PROLOG_MAJOR_OFFSET
final static int PERFDATA_PROLOG_MAJOR_OFFSET(Code)

PERFDATA_PROLOG_MAJOR_SIZE
final static int PERFDATA_PROLOG_MAJOR_SIZE(Code)

PERFDATA_PROLOG_MINOR_OFFSET
final static int PERFDATA_PROLOG_MINOR_OFFSET(Code)

PERFDATA_PROLOG_MINOR_SIZE
final static int PERFDATA_PROLOG_MINOR_SIZE(Code)

PERFDATA_PROLOG_OFFSET
final static int PERFDATA_PROLOG_OFFSET(Code)

PERFDATA_PROLOG_RESERVEDB1_OFFSET
final static int PERFDATA_PROLOG_RESERVEDB1_OFFSET(Code)

PERFDATA_PROLOG_RESERVEDB1_SIZE
final static int PERFDATA_PROLOG_RESERVEDB1_SIZE(Code)

PERFDATA_PROLOG_SIZE
final static int PERFDATA_PROLOG_SIZE(Code)

byteBuffer
protected ByteBuffer byteBuffer(Code)

Constructor Detail
AbstractPerfDataBufferPrologue
public AbstractPerfDataBufferPrologue(ByteBuffer byteBuffer) throws MonitorException(Code)
Construct a PerfDataBufferPrologue instance.
Parameters:
  byteBuffer - buffer containing the instrumentation data

Method Detail
getByteOrder
public ByteOrder getByteOrder()(Code)
Get the byte order. int - the byte order of the instrumentation buffer

getByteOrder
public static ByteOrder getByteOrder(ByteBuffer bb)(Code)
Get the byte order for the given ByteBuffer. int - the byte order of the instrumentation buffer

getMagic
public int getMagic()(Code)
Get the magic number. int - the magic number

getMagic
public static int getMagic(ByteBuffer bb)(Code)
Get the magic number from the given byteBuffer. int - the magic number

getMajorVersion
public int getMajorVersion()(Code)
Get the major version. int - the major version

getMajorVersion
public static int getMajorVersion(ByteBuffer bb)(Code)
Get the major version number from the given ByteBuffer. int - the major version

getMinorVersion
public int getMinorVersion()(Code)
Get the minor version. int - the minor version

getMinorVersion
public static int getMinorVersion(ByteBuffer bb)(Code)
Get the minor version number from the given ByteBuffer. int - the minor version

getSize
public int getSize()(Code)
Get the size of the header portion of the instrumentation buffer. int - the size of the header

isAccessible
abstract public boolean isAccessible()(Code)
Get the accessible flag. If supported, it indicates that the shared memory region is sufficiently initialized for client acccess. boolean - the initialized status
See Also:   AbstractPerfDataBufferPrologue.supportsAccessible()

majorVersionBuffer
public IntBuffer majorVersionBuffer()(Code)
Return an IntBuffer that accesses the major version number. This is used to create a Monitor object for this value. IntBuffer - a ByteBuffer that accesses the major version numberin the instrumentation buffer header.

minorVersionBuffer
public IntBuffer minorVersionBuffer()(Code)
Return an IntBuffer that accesses the minor version number. This is used to create a Monitor object for this value. IntBuffer - a ByteBuffer that accesses the minor version numberin the instrumentation buffer header.

supportsAccessible
abstract public boolean supportsAccessible()(Code)
Test if the accessible flag is supported by this version of the PerfDataBufferPrologue. Although not an abstract method, this method should be overridden by version specific subclasses. boolean - the initialized flag support status.
See Also:   AbstractPerfDataBufferPrologue.isAccessible()

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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