org.apache.cassandra.repair

Class Validator

java.lang.Object

org.apache.cassandra.repair.Validator

All Implemented Interfaces:

java.lang.Runnable

public class Validator
extends java.lang.Object
implements java.lang.Runnable

Handles the building of a merkle tree for a column family. Lifecycle: 1. prepare() - Initialize tree with samples. 2. add() - 0 or more times, to add hashes to the tree. 3. complete() - Enqueues any operations that were blocked waiting for a valid tree.

Field Summary

Fields

Modifier and Type	Field and Description
RepairJobDesc	desc
static MerkleTree.RowHash	EMPTY_ROW
int	gcBefore
java.net.InetAddress	initiator
MerkleTree	tree

Constructor Summary

Constructors

Constructor and Description
Validator(RepairJobDesc desc, java.net.InetAddress initiator, int gcBefore) Create Validator with default size of initial Merkle Tree.
Validator(RepairJobDesc desc, java.net.InetAddress initiator, MerkleTree tree, int gcBefore)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(AbstractCompactedRow row) Called (in order) for every row present in the CF.
void	complete() Registers the newly created tree for rendezvous in Stage.ANTIENTROPY.
void	completeTree()
void	fail() Called when some error during the validation happened.
void	prepare(ColumnFamilyStore cfs)
void	run() Called after the validation lifecycle to respond with the now valid tree.

Methods inherited from class java.lang.Object

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

Field Detail

desc

public final RepairJobDesc desc

initiator

public final java.net.InetAddress initiator

tree

public final MerkleTree tree

gcBefore

public final int gcBefore

EMPTY_ROW

public static final MerkleTree.RowHash EMPTY_ROW

Constructor Detail

Validator

public Validator(RepairJobDesc desc,
         java.net.InetAddress initiator,
         int gcBefore)

Create Validator with default size of initial Merkle Tree.

Validator

public Validator(RepairJobDesc desc,
         java.net.InetAddress initiator,
         MerkleTree tree,
         int gcBefore)

Method Detail

prepare

public void prepare(ColumnFamilyStore cfs)

add

public void add(AbstractCompactedRow row)

Called (in order) for every row present in the CF. Hashes the row, and adds it to the tree being built.

Parameters:

row - Row to add hash

complete

public void complete()

Registers the newly created tree for rendezvous in Stage.ANTIENTROPY.

completeTree

public void completeTree()

fail

public void fail()

Called when some error during the validation happened. This sends RepairStatus to inform the initiator that the validation has failed. The actual reason for failure should be looked up in the log of the host calling this function.

run

public void run()

Called after the validation lifecycle to respond with the now valid tree. Runs in Stage.ANTIENTROPY.

Specified by:

run in interface java.lang.Runnable