org.apache.solr.hadoop.dedup
Class NoChangeUpdateConflictResolver

java.lang.Object
  org.apache.solr.hadoop.dedup.NoChangeUpdateConflictResolver

All Implemented Interfaces:

UpdateConflictResolver

public final class NoChangeUpdateConflictResolver
extends Object
implements UpdateConflictResolver

UpdateConflictResolver implementation that returns the solr documents in the same order as they are received on input, i.e. without change in order.

Constructor Summary

NoChangeUpdateConflictResolver()

Method Summary

Iterator<SolrInputDocument>

orderUpdates(org.apache.hadoop.io.Text key, Iterator<SolrInputDocument> updates, org.apache.hadoop.mapreduce.Reducer.Context ctx) Given a list of all colliding document updates for the same unique document key, this method returns zero or more documents in an application specific order.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoChangeUpdateConflictResolver

public NoChangeUpdateConflictResolver()

Method Detail

orderUpdates

public Iterator<SolrInputDocument> orderUpdates(org.apache.hadoop.io.Text key,
                                                Iterator<SolrInputDocument> updates,
                                                org.apache.hadoop.mapreduce.Reducer.Context ctx)

Description copied from interface: UpdateConflictResolver

Given a list of all colliding document updates for the same unique document key, this method returns zero or more documents in an application specific order. The caller will then apply the updates for this key to Solr in the order returned by the orderUpdate() method.

Specified by:

orderUpdates in interface UpdateConflictResolver

Parameters:

key - the document key common to all collidingUpdates mentioned below

updates - all updates in the MapReduce job that have a key equal to uniqueKey mentioned above. The input order is unspecified.

ctx - The Context passed from the Reducer implementations.

Returns:

the order in which the updates shall be applied to Solr