org.calrissian.accumlorecipes.changelog

Interface ChangelogStore

All Known Implementing Classes:

AccumuloChangelogStore

public interface ChangelogStore

A Changelog store to represent a bucketed set of hashes representing change sets that can be shared between two distributed environment. Of a large number of buckets representing changes, the comparing two merkle trees should allow systems to figure out exactly 'which' buckets are different.

Method Summary

Methods

Modifier and Type	Method and Description
void	flush()
org.calrissian.mango.collect.CloseableIterable<org.calrissian.mango.domain.event.Event>	getChanges(Iterable<Date> buckets, Auths auths) Get changesets living inside of the given buckets
org.calrissian.mango.hash.tree.MerkleTree	getChangeTree(Date start, Date stop, Auths auths) Get a Merkle tree containing hashes of each of the buckets
org.calrissian.mango.hash.tree.MerkleTree	getChangeTree(Date start, Date stop, int dimensions, Auths auths) Get a Merkle tree containing hashes of each of the buckets with the given dimensions
void	put(Iterable<org.calrissian.mango.domain.event.Event> changes) Put a changeset into the changeset store.

Method Detail

put

void put(Iterable<org.calrissian.mango.domain.event.Event> changes)

Put a changeset into the changeset store.

Parameters:

changes -

flush

void flush()
           throws Exception

Throws:

Exception

getChangeTree

org.calrissian.mango.hash.tree.MerkleTree getChangeTree(Date start,
                                                      Date stop,
                                                      Auths auths)

Get a Merkle tree containing hashes of each of the buckets

Parameters:

start -

stop -

Returns:

getChangeTree

org.calrissian.mango.hash.tree.MerkleTree getChangeTree(Date start,
                                                      Date stop,
                                                      int dimensions,
                                                      Auths auths)

Get a Merkle tree containing hashes of each of the buckets with the given dimensions

Parameters:

start -

stop -

Returns:

getChanges

org.calrissian.mango.collect.CloseableIterable<org.calrissian.mango.domain.event.Event> getChanges(Iterable<Date> buckets,
                                                                                                 Auths auths)

Get changesets living inside of the given buckets

Parameters:

buckets - dates representing time increments (i.e. 15 minutes)

Returns: