org.apache.cassandra.db.context

Class CounterContext.ContextState

java.lang.Object

org.apache.cassandra.db.context.CounterContext.ContextState

Enclosing class:

CounterContext

public static class CounterContext.ContextState
extends java.lang.Object

Helper class to work on contexts (works by iterating over them). A context being abstractly a list of tuple (counterid, clock, count), a ContextState encapsulate a context and a position to one of the tuple. It also allow to create new context iteratively. Note: this is intrinsically a private class intended for use by the methods of CounterContext only. It is however public because it is convenient to create handcrafted context for unit tests.

Field Summary

Fields

Modifier and Type	Field and Description
java.nio.ByteBuffer	context
int	headerLength

Method Summary

Modifier and Type	Method and Description
static CounterContext.ContextState	allocate(int globalCount, int localCount, int remoteCount) Allocate a new context big enough for globalCount + localCount + remoteCount elements and return the initial corresponding ContextState.
int	compareIdTo(CounterContext.ContextState other)
void	copyTo(CounterContext.ContextState other)
long	getClock()
long	getCount()
CounterId	getCounterId()
int	getElementIndex()
boolean	hasRemaining()
boolean	isGlobal()
boolean	isLocal()
boolean	isRemote()
void	moveToNext()
void	reset()
static CounterContext.ContextState	wrap(java.nio.ByteBuffer context)
void	writeGlobal(CounterId id, long clock, long count)
void	writeLocal(CounterId id, long clock, long count)
void	writeRemote(CounterId id, long clock, long count)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

context

public final java.nio.ByteBuffer context

headerLength

public final int headerLength

Method Detail

wrap

public static CounterContext.ContextState wrap(java.nio.ByteBuffer context)

allocate

public static CounterContext.ContextState allocate(int globalCount,
                                                   int localCount,
                                                   int remoteCount)

Allocate a new context big enough for globalCount + localCount + remoteCount elements and return the initial corresponding ContextState.

isGlobal

public boolean isGlobal()

isLocal

public boolean isLocal()

isRemote

public boolean isRemote()

hasRemaining

public boolean hasRemaining()

moveToNext

public void moveToNext()

copyTo

public void copyTo(CounterContext.ContextState other)

compareIdTo

public int compareIdTo(CounterContext.ContextState other)

reset

public void reset()

getElementIndex

public int getElementIndex()

getCounterId

public CounterId getCounterId()

getClock

public long getClock()

getCount

public long getCount()

writeGlobal

public void writeGlobal(CounterId id,
                        long clock,
                        long count)

writeLocal

public void writeLocal(CounterId id,
                       long clock,
                       long count)

writeRemote

public void writeRemote(CounterId id,
                        long clock,
                        long count)