Package com.eventstore.dbclient

Class ExpectedRevision

java.lang.Object

com.eventstore.dbclient.ExpectedRevision

Direct Known Subclasses:

ExpectedRevision.AnyExpectedRevision, ExpectedRevision.NoStreamExpectedRevision, ExpectedRevision.SpecificExpectedRevision, ExpectedRevision.StreamExistsExpectedRevision

public abstract class ExpectedRevision
extends Object

Constants used for expected revision control.

The EventStoreDB server will assure idempotency for all requests using any value in ExpectedRevision except ANY. When using ANY, the EventStoreDB server will do its best to assure idempotency but will not guarantee it. Any other ExpectedRevision instances are meant for optimistic concurrency checks.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ExpectedRevision.AnyExpectedRevision
static class	ExpectedRevision.NoStreamExpectedRevision
static class	ExpectedRevision.SpecificExpectedRevision
static class	ExpectedRevision.StreamExistsExpectedRevision

Method Summary

Modifier and Type	Method	Description
static ExpectedRevision	any()	This writes should not conflict with anything and should always succeed.
boolean	equals(Object o)
static ExpectedRevision	expectedRevision(long revision)	States that the last event written to the stream should have an event revision matching your expected value.
static ExpectedRevision	fromRawLong(long revision)
int	hashCode()
static ExpectedRevision	noStream()	The stream being written to should not yet exist.
static ExpectedRevision	streamExists()	The stream should exist.
long	toRawLong()

Methods inherited from class java.lang.Object

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

Method Details

any

public static ExpectedRevision any()

This writes should not conflict with anything and should always succeed.

noStream

public static ExpectedRevision noStream()

The stream being written to should not yet exist. If it does exist, treats that as a concurrency problem.

streamExists

public static ExpectedRevision streamExists()

The stream should exist. If it or a metadata stream does not exist, treats that as a concurrency problem.

expectedRevision

public static ExpectedRevision expectedRevision(long revision)

States that the last event written to the stream should have an event revision matching your expected value.

fromRawLong

public static ExpectedRevision fromRawLong(long revision)

toRawLong

public long toRawLong()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object