de.otto.synapse.messagestore

Class CompositeIndexer

java.lang.Object

de.otto.synapse.messagestore.CompositeIndexer

All Implemented Interfaces:

Indexer

@Beta
public class CompositeIndexer
extends java.lang.Object
implements Indexer

An Indexer that is a composition of other Indexers.

Constructor Summary

Constructors

Constructor and Description
CompositeIndexer(com.google.common.collect.ImmutableList<Indexer> indexers) Creates a CompositeIndex from a list of Indexers.

Method Summary

Modifier and Type	Method and Description
java.lang.String	calc(Index index, MessageStoreEntry entry) Calculates the Index value from the message-store entry.
com.google.common.collect.ImmutableSet<Index>	getIndexes() Returns the indexes supported by this Indexer.
MessageStoreEntry	index(MessageStoreEntry entry)
boolean	supports(Index index)

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeIndexer

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

Creates a CompositeIndex from a list of Indexers.

If there are multiple Indexers responsible for the same Index, the first Indexer instance will be used and all other instances will not be used to calculate the Index.

Parameters:

indexers - the indexers used to build the composite

Method Detail

getIndexes

@Nonnull
public com.google.common.collect.ImmutableSet<Index> getIndexes()

Description copied from interface: Indexer

Returns the indexes supported by this Indexer.

Specified by:

getIndexes in interface Indexer

Returns:

Set of Index instances

supports

public boolean supports(@Nonnull
                        Index index)

Specified by:

supports in interface Indexer

Parameters:

index - the Index

Returns:

true, if the Index is supported, false otherwise.

calc

public java.lang.String calc(@Nonnull
                             Index index,
                             @Nonnull
                             MessageStoreEntry entry)

Description copied from interface: Indexer

Calculates the Index value from the message-store entry.

Specified by:

calc in interface Indexer

Parameters:

index - the Index

entry - the MessageStoreEntry

Returns:

indexed value

index

@Nonnull
public MessageStoreEntry index(@Nonnull
                                        MessageStoreEntry entry)

Specified by:

index in interface Indexer