Package org.apache.zookeeper.server

Class TxnLogProposalIterator

java.lang.Object

org.apache.zookeeper.server.TxnLogProposalIterator

All Implemented Interfaces:

Iterator<Leader.Proposal>

public class TxnLogProposalIterator
extends Object
implements Iterator<Leader.Proposal>

This class provides an iterator interface to access Proposal deserialized from on-disk txnlog. The iterator deserializes one proposal at a time to reduce memory footprint. Note that the request part of the proposal is not initialized and set to null since we don't need it during follower sync-up.

Field Summary

Fields

Modifier and Type	Field	Description
static TxnLogProposalIterator	EMPTY_ITERATOR

Constructor Summary

Constructors

Constructor	Description
TxnLogProposalIterator(TxnLog.TxnIterator itr)

Method Summary

Modifier and Type	Method	Description
void	close()	Close the files and release the resources which are used for iterating transaction records
boolean	hasNext()
Leader.Proposal	next()	Proposal returned by this iterator has request part set to null, since it is not used for follower sync-up.
void	remove()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

EMPTY_ITERATOR

public static final TxnLogProposalIterator EMPTY_ITERATOR

Constructor Detail

TxnLogProposalIterator

public TxnLogProposalIterator(TxnLog.TxnIterator itr)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Leader.Proposal>

next

public Leader.Proposal next()

Proposal returned by this iterator has request part set to null, since it is not used for follower sync-up.

Specified by:

next in interface Iterator<Leader.Proposal>

remove

public void remove()

Specified by:

remove in interface Iterator<Leader.Proposal>

close

public void close()

Close the files and release the resources which are used for iterating transaction records