net.timewalker.ffmq4.storage.data.impl.journal

Class JournalQueue

java.lang.Object

net.timewalker.ffmq4.storage.data.impl.journal.JournalQueue

public final class JournalQueue
extends Object

FIFO queue of AbstractJournalOperation objects

Constructor Summary

Constructors

Constructor and Description
JournalQueue()

Method Summary

Modifier and Type	Method and Description
void	addLast(AbstractJournalOperation op) Append an operation at the end of the queue
AbstractJournalOperation	getFirst() Return the first operation in queue
void	migrateTo(JournalQueue otherQueue) Migrate all operations to the given target queue
AbstractJournalOperation	removeFirst() Remove the first available journal operation in queue
int	size() Get the queue size

Methods inherited from class java.lang.Object

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

Constructor Detail

JournalQueue

public JournalQueue()

Method Detail

getFirst

public AbstractJournalOperation getFirst()

Return the first operation in queue

Returns:

the first operation in queue

addLast

public void addLast(AbstractJournalOperation op)

Append an operation at the end of the queue

Parameters:

op - a journal operation

removeFirst

public AbstractJournalOperation removeFirst()

Remove the first available journal operation in queue

Returns:

a journal operation

Throws:

NoSuchElementException - if queue is empty

migrateTo

public void migrateTo(JournalQueue otherQueue)

Migrate all operations to the given target queue

Parameters:

otherQueue - target journal queue

size

public int size()

Get the queue size

Returns:

number of operations in queue