org.apache.cassandra.utils

Class CoalescingStrategies.CoalescingStrategy

java.lang.Object

org.apache.cassandra.utils.CoalescingStrategies.CoalescingStrategy

Enclosing class:

CoalescingStrategies

public abstract static class CoalescingStrategies.CoalescingStrategy
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected java.nio.ByteBuffer	logBuffer
protected org.slf4j.Logger	logger
protected org.apache.cassandra.utils.CoalescingStrategies.Parker	parker
protected boolean	shouldLogAverage

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CoalescingStrategy(org.apache.cassandra.utils.CoalescingStrategies.Parker parker, org.slf4j.Logger logger, java.lang.String displayName)

Method Summary

Modifier and Type	Method and Description
<C extends CoalescingStrategies.Coalescable> void	coalesce(java.util.concurrent.BlockingQueue<C> input, java.util.List<C> out, int maxItems) Drain from the input blocking queue to the output list up to maxItems elements.
protected abstract <C extends CoalescingStrategies.Coalescable> void	coalesceInternal(java.util.concurrent.BlockingQueue<C> input, java.util.List<C> out, int maxItems)
protected void	debugGap(long averageGap)
protected void	debugTimestamp(long timestamp)
protected <C extends CoalescingStrategies.Coalescable> void	debugTimestamps(java.util.Collection<C> coalescables)

Methods inherited from class java.lang.Object

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

Field Detail

parker

protected final org.apache.cassandra.utils.CoalescingStrategies.Parker parker

logger

protected final org.slf4j.Logger logger

shouldLogAverage

protected volatile boolean shouldLogAverage

logBuffer

protected final java.nio.ByteBuffer logBuffer

Constructor Detail

CoalescingStrategy

protected CoalescingStrategy(org.apache.cassandra.utils.CoalescingStrategies.Parker parker,
                             org.slf4j.Logger logger,
                             java.lang.String displayName)

Method Detail

debugGap

protected final void debugGap(long averageGap)

debugTimestamp

protected final void debugTimestamp(long timestamp)

debugTimestamps

protected final <C extends CoalescingStrategies.Coalescable> void debugTimestamps(java.util.Collection<C> coalescables)

coalesce

public <C extends CoalescingStrategies.Coalescable> void coalesce(java.util.concurrent.BlockingQueue<C> input,
                                                                  java.util.List<C> out,
                                                                  int maxItems)
                                                           throws java.lang.InterruptedException

Drain from the input blocking queue to the output list up to maxItems elements. The coalescing strategy may choose to park the current thread if it thinks it will be able to produce an output list with more elements.

Parameters:

input - Blocking queue to retrieve elements from

out - Output list to place retrieved elements in. Must be empty.

maxItems - Maximum number of elements to place in the output list

Throws:

java.lang.InterruptedException

coalesceInternal

protected abstract <C extends CoalescingStrategies.Coalescable> void coalesceInternal(java.util.concurrent.BlockingQueue<C> input,
                                                                                      java.util.List<C> out,
                                                                                      int maxItems)
                                                                               throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException