com.orientechnologies.orient.server.distributed.conflict

Interface ODistributedConflictResolver

All Known Implementing Classes:

OAbstractDistributedConflictResolver, OContentDistributedConflictResolver, ODCDistributedConflictResolver, OMajorityDistributedConflictResolver, 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

Method Summary

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

Method Detail

onConflict

ODistributedConflictResolver.OConflictResult onConflict(String databaseName,
                                                        String clusterName,
                                                        com.orientechnologies.orient.core.id.ORecordId rid,
                                                        ODistributedServerManager dManager,
                                                        Map<Object,List<String>> groupedServerValues,
                                                        com.orientechnologies.orient.core.record.impl.ODocument config)

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

config - The ODocument representing the configuration of the conflict resolver. it's optional, null means no configuration

Returns:

The winning result object

getName

String getName()

Name to register in the factory.