de.otto.synapse.messagestore

Class Indexers

java.lang.Object

de.otto.synapse.messagestore.Indexers

@Beta
public class Indexers
extends java.lang.Object

Utility class used to create Indexer instances.

Method Summary

Modifier and Type	Method and Description
static Indexer	channelNameIndexer() Returns an Indexer that is indexing TextMessage by Key.partitionKey().
static Indexer	composite(com.google.common.collect.ImmutableList<Indexer> indexers) Returns a composite Indexer that is able to support several indexes.
static Indexer	composite(Indexer... indexers) Returns a composite Indexer that is able to support several indexes.
static Indexer	journalKeyIndexer()
static Indexer	noOpIndexer()
static Indexer	originIndexer(java.lang.String origin) Returns an Indexer that is indexing all entries with static value that is identifying the origin of some message.
static Indexer	partitionKeyIndexer() Returns an Indexer that is indexing TextMessage by Key.partitionKey().
static Indexer	serviceInstanceIndexer(java.lang.String serviceInstance) Returns an Indexer that is indexing all entries with static value that is identifying the service-instance that has added the message to the MessageStore.

Methods inherited from class java.lang.Object

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

Method Detail

noOpIndexer

public static Indexer noOpIndexer()

Returns:

no-op Indexer that is not doing anything.

composite

public static Indexer composite(com.google.common.collect.ImmutableList<Indexer> indexers)

Returns a composite Indexer that is able to support several indexes.

Parameters:

indexers - the list of Indexers

Returns:

composite Indexer

composite

public static Indexer composite(Indexer... indexers)

Returns a composite Indexer that is able to support several indexes.

Parameters:

indexers - the list of Indexers

Returns:

composite Indexer

originIndexer

public static Indexer originIndexer(@Nonnull
                                    java.lang.String origin)

Returns an Indexer that is indexing all entries with static value that is identifying the origin of some message.

The origin can be the name of the service sending the message, or some other identifier like, for example 'Snapshot'.

Parameters:

origin - the origin of the indexed message

Returns:

origin indexer

serviceInstanceIndexer

public static Indexer serviceInstanceIndexer(@Nonnull
                                             java.lang.String serviceInstance)

Returns an Indexer that is indexing all entries with static value that is identifying the service-instance that has added the message to the MessageStore.

In most cases, a hostname:port or service-name@hostname:port value is sufficient to identify the instance of some service

Parameters:

serviceInstance - a string identifying a single instance of a cluster.

Returns:

serviceInstance indexer

partitionKeyIndexer

public static Indexer partitionKeyIndexer()

Returns an Indexer that is indexing TextMessage by Key.partitionKey().

Returns:

partition-key indexer

journalKeyIndexer

public static Indexer journalKeyIndexer()

channelNameIndexer

public static Indexer channelNameIndexer()

Returns an Indexer that is indexing TextMessage by Key.partitionKey().

Returns:

partition-key indexer