Package org.apache.cassandra.service.paxos

Class Commit

java.lang.Object

org.apache.cassandra.service.paxos.Commit

Direct Known Subclasses:

Commit.Proposal

public class Commit
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Commit.Accepted
static class	Commit.AcceptedWithTTL
static class	Commit.Agreed
static class	Commit.CommitSerializer<T extends Commit>
static class	Commit.Committed
static class	Commit.CommittedWithTTL
static class	Commit.Proposal

Field Summary

Fields

Modifier and Type	Field	Description
Ballot	ballot
static Commit.CommitSerializer<Commit>	serializer
PartitionUpdate	update

Constructor Summary

Constructors

Constructor	Description
Commit(Ballot ballot, PartitionUpdate update)

Method Summary

Modifier and Type	Method	Description
org.apache.cassandra.service.paxos.Commit.CompareResult	compareWith(Commit that)
static Commit	emptyCommit(DecoratedKey partitionKey, TableMetadata metadata)
boolean	equals(java.lang.Object o)
boolean	hasBallot(Ballot ballot)
int	hashCode()
boolean	hasSameBallot(Commit other)
boolean	isAfter(Ballot otherBallot)
static boolean	isAfter(Ballot testIsAfter, Ballot testIsBefore)
static boolean	isAfter(Ballot testIsAfter, Commit testIsBefore)
boolean	isAfter(Commit other)
static boolean	isAfter(Commit testIsAfter, Ballot testIsBefore)
static boolean	isAfter(Commit testIsAfter, Commit testIsBefore)
boolean	isBefore(Ballot otherBallot)
boolean	isReproposalOf(Commit older)	We can witness reproposals of the latest successful commit; we can detect this by comparing the timestamp of the update with our ballot; if it is the same, we are not a reproposal.
boolean	isSameOrAfter(Ballot otherBallot)
static <C extends Commit> C	latest(C a, C b)	the latest of two ballots, or the first ballot if equal timestamps
static Ballot	latest(Ballot a, Ballot b)	the latest of two ballots, or the first ballot if equal timestamps
static Ballot	latest(Commit a, Ballot b)	the latest of two ballots, or the first ballot if equal timestamps
Mutation	makeMutation()
static Commit	newPrepare(DecoratedKey partitionKey, TableMetadata metadata, Ballot ballot)
static Commit	newProposal(Ballot ballot, PartitionUpdate update)	Deprecated.
static boolean	timestampsClash(Ballot a, Ballot b)
static boolean	timestampsClash(Commit a, Ballot b)	unequal ballots with same timestamp
java.lang.String	toString()
java.lang.String	toString(java.lang.String kind)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

serializer

public static final Commit.CommitSerializer<Commit> serializer

ballot

public final Ballot ballot

update

public final PartitionUpdate update

Constructor Detail

Commit

public Commit(Ballot ballot,
              PartitionUpdate update)

Method Detail

newPrepare

public static Commit newPrepare(DecoratedKey partitionKey,
                                TableMetadata metadata,
                                Ballot ballot)

emptyCommit

public static Commit emptyCommit(DecoratedKey partitionKey,
                                 TableMetadata metadata)

newProposal

@Deprecated
public static Commit newProposal(Ballot ballot,
                                 PartitionUpdate update)

Deprecated.

isAfter

public boolean isAfter(Commit other)

isSameOrAfter

public boolean isSameOrAfter(@Nullable
                             Ballot otherBallot)

isAfter

public boolean isAfter(@Nullable
                       Ballot otherBallot)

isBefore

public boolean isBefore(@Nullable
                        Ballot otherBallot)

hasBallot

public boolean hasBallot(Ballot ballot)

hasSameBallot

public boolean hasSameBallot(Commit other)

makeMutation

public Mutation makeMutation()

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toString

public java.lang.String toString(java.lang.String kind)

isReproposalOf

public boolean isReproposalOf(Commit older)

We can witness reproposals of the latest successful commit; we can detect this by comparing the timestamp of the update with our ballot; if it is the same, we are not a reproposal. If it is the same as either the ballot timestamp or update timestamp of the latest committed proposal, then we are reproposing it and can instead simpy commit it.

compareWith

public org.apache.cassandra.service.paxos.Commit.CompareResult compareWith(Commit that)

isAfter

public static boolean isAfter(@Nullable
                              Commit testIsAfter,
                              @Nullable
                              Commit testIsBefore)

Returns:

testIfAfter.isAfter(testIfBefore), with non-null > null

isAfter

public static boolean isAfter(@Nullable
                              Ballot testIsAfter,
                              @Nullable
                              Commit testIsBefore)

Returns:

testIfAfter.isAfter(testIfBefore), with non-null > null

isAfter

public static boolean isAfter(@Nullable
                              Commit testIsAfter,
                              @Nullable
                              Ballot testIsBefore)

Returns:

testIfAfter.isAfter(testIfBefore), with non-null > null

isAfter

public static boolean isAfter(@Nullable
                              Ballot testIsAfter,
                              @Nullable
                              Ballot testIsBefore)

Returns:

testIfAfter.isAfter(testIfBefore), with non-null > null

latest

public static <C extends Commit> C latest(@Nullable
                                          C a,
                                          @Nullable
                                          C b)

the latest of two ballots, or the first ballot if equal timestamps

latest

public static Ballot latest(@Nullable
                            Commit a,
                            @Nullable
                            Ballot b)

the latest of two ballots, or the first ballot if equal timestamps

latest

public static Ballot latest(@Nullable
                            Ballot a,
                            @Nullable
                            Ballot b)

the latest of two ballots, or the first ballot if equal timestamps

timestampsClash

public static boolean timestampsClash(@Nullable
                                      Commit a,
                                      @Nullable
                                      Ballot b)

unequal ballots with same timestamp

timestampsClash

public static boolean timestampsClash(@Nullable
                                      Ballot a,
                                      @Nullable
                                      Ballot b)