com.orientechnologies.orient.server.distributed.conflict

Interface ODistributedConflictResolver

All Known Implementing Classes:

OAbstractDistributedConflictResolver, OContentDistributedConflictResolver, ODCDistributedConflictResolver, OMajorityDistributedConflictResolver, OQuorumDistributedConflictResolver, OVersionDistributedConflictResolver

public interface ODistributedConflictResolver

Base interface to manage distributed conflicts. The onConflict() method is responsible to resolve the conflicts by providing the winning result. If it's not able to do that, NULL is returned. You can configure resolver in chain, so for example you can have the majority first, but in case ov even votes you can assign the winner to one data center or to a custom algorithm implemented by the user. If the call chain returns NULL, no operation is done.

Author:

Luca Garulli

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ODistributedConflictResolver.OConflictResult

Field Summary

Fields

Modifier and Type	Field and Description
static Object	NOT_FOUND

Method Summary

Modifier and Type	Method and Description
void	configure(ODocument config)
String	getName() Name to register in the factory.
ODistributedConflictResolver.OConflictResult	onConflict(String databaseName, String clusterName, ORecordId rid, ODistributedServerManager dManager, Map<Object,List<String>> groupedServerValues) Called on distributed conflict.

Field Detail

NOT_FOUND

static final Object NOT_FOUND

Method Detail

configure

void configure(ODocument config)

onConflict

ODistributedConflictResolver.OConflictResult onConflict(String databaseName,
                                                        String clusterName,
                                                        ORecordId rid,
                                                        ODistributedServerManager dManager,
                                                        Map<Object,List<String>> groupedServerValues)

Called on distributed conflict. It is responsible to resolve the conflicts by providing the winning result. If it's not able to do that, NULL is returned.

Parameters:

databaseName -

clusterName -

rid - RecordID of the record in conflict

dManager - Current distributed manager instance

groupedServerValues - All the values from the servers grouped by value. The key could also be an exception in case the record was not found. @return The winning object

Returns:

The winning result object

getName

String getName()

Name to register in the factory.