com.hazelcast.jet.pipeline

Enum JournalInitialPosition

java.lang.Object

java.lang.Enum<JournalInitialPosition>

com.hazelcast.jet.pipeline.JournalInitialPosition

All Implemented Interfaces:

Serializable, Comparable<JournalInitialPosition>

public enum JournalInitialPosition
extends Enum<JournalInitialPosition>

When passed to an IMap/ICache Event Journal source, specifies which event to start from. You can start from the oldest event still in the journal or skip all the history and receive only the events that occur after connecting to the event journal.

See:

• Sources.mapJournal(java.lang.String, com.hazelcast.jet.pipeline.JournalInitialPosition, com.hazelcast.function.FunctionEx<? super com.hazelcast.map.EventJournalMapEvent<K, V>, ? extends T>, com.hazelcast.function.PredicateEx<? super com.hazelcast.map.EventJournalMapEvent<K, V>>)
• Sources.remoteMapJournal(java.lang.String, com.hazelcast.client.config.ClientConfig, com.hazelcast.jet.pipeline.JournalInitialPosition, com.hazelcast.function.FunctionEx<? super com.hazelcast.map.EventJournalMapEvent<K, V>, ? extends T>, com.hazelcast.function.PredicateEx<? super com.hazelcast.map.EventJournalMapEvent<K, V>>)
• Sources.cacheJournal(java.lang.String, com.hazelcast.jet.pipeline.JournalInitialPosition, com.hazelcast.function.FunctionEx<? super com.hazelcast.cache.EventJournalCacheEvent<K, V>, ? extends T>, com.hazelcast.function.PredicateEx<? super com.hazelcast.cache.EventJournalCacheEvent<K, V>>)
• Sources.remoteCacheJournal(java.lang.String, com.hazelcast.client.config.ClientConfig, com.hazelcast.jet.pipeline.JournalInitialPosition, com.hazelcast.function.FunctionEx<? super com.hazelcast.cache.EventJournalCacheEvent<K, V>, ? extends T>, com.hazelcast.function.PredicateEx<? super com.hazelcast.cache.EventJournalCacheEvent<K, V>>)

Since:

Jet 3.0

Enum Constant Summary

Enum Constants

Enum Constant and Description
START_FROM_CURRENT Skip all the history and emit only the events that occur after connecting to the journal.
START_FROM_OLDEST Start from the oldest event still available.

Method Summary

Modifier and Type	Method and Description
static JournalInitialPosition	valueOf(String name) Returns the enum constant of this type with the specified name.
static JournalInitialPosition[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

START_FROM_OLDEST

public static final JournalInitialPosition START_FROM_OLDEST

Start from the oldest event still available.

START_FROM_CURRENT

public static final JournalInitialPosition START_FROM_CURRENT

Skip all the history and emit only the events that occur after connecting to the journal.

Method Detail

values

public static JournalInitialPosition[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (JournalInitialPosition c : JournalInitialPosition.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static JournalInitialPosition valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null