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 (nodeid, 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

java.nio.ByteBuffer	context
int	headerLength

Constructor Summary

CounterContext.ContextState(java.nio.ByteBuffer context)

CounterContext.ContextState(java.nio.ByteBuffer context, int headerLength)

Method Summary

static CounterContext.ContextState	allocate(int elementCount, int deltaCount)
static CounterContext.ContextState	allocate(int elementCount, int deltaCount, Allocator allocator)
int	compareIdTo(CounterContext.ContextState other)
void	copyTo(CounterContext.ContextState other)
CounterContext.ContextState	duplicate()
int	elementIdx()
long	getClock()
long	getCount()
NodeId	getNodeId()
boolean	hasRemaining()
boolean	isDelta()
void	moveToNext()
int	remainingBodyLength()
int	remainingHeaderLength()
void	reset()
void	writeElement(NodeId id, long clock, long count)
void	writeElement(NodeId id, long clock, long count, boolean isDelta)

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

Constructor Detail

CounterContext.ContextState

public CounterContext.ContextState(java.nio.ByteBuffer context,
                                   int headerLength)

CounterContext.ContextState

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

Method Detail

isDelta

public boolean isDelta()

hasRemaining

public boolean hasRemaining()

remainingHeaderLength

public int remainingHeaderLength()

remainingBodyLength

public int remainingBodyLength()

moveToNext

public void moveToNext()

copyTo

public void copyTo(CounterContext.ContextState other)

compareIdTo

public int compareIdTo(CounterContext.ContextState other)

reset

public void reset()

getNodeId

public NodeId getNodeId()

getClock

public long getClock()

getCount

public long getCount()

writeElement

public void writeElement(NodeId id,
                         long clock,
                         long count,
                         boolean isDelta)

writeElement

public void writeElement(NodeId id,
                         long clock,
                         long count)

elementIdx

public int elementIdx()

duplicate

public CounterContext.ContextState duplicate()

allocate

public static CounterContext.ContextState allocate(int elementCount,
                                                   int deltaCount)

allocate

public static CounterContext.ContextState allocate(int elementCount,
                                                   int deltaCount,
                                                   Allocator allocator)