Package com.linkedin.venice.helix

Class HelixInstanceConfigRepository

java.lang.Object

com.linkedin.venice.helix.HelixInstanceConfigRepository

All Implemented Interfaces:

VeniceResource, org.apache.helix.api.listeners.InstanceConfigChangeListener

public class HelixInstanceConfigRepository
extends Object
implements VeniceResource, org.apache.helix.api.listeners.InstanceConfigChangeListener

This repository is used to store the instance config per instance. So far it only stores group/zone info, and we could add more if necessary in the future.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_INSTANCE_GROUP_ID
static final String	GROUP_FIELD_NAME_IN_DOMAIN
static final String	ZONE_FIELD_NAME_IN_DOMAIN

Constructor Summary

Constructors

Constructor	Description
HelixInstanceConfigRepository(SafeHelixManager manager, boolean useGroupFieldInDomain)

Method Summary

Modifier and Type	Method	Description
void	clear()
int	getGroupCount()
int	getInstanceGroupId(String instanceId)
Map<String,Integer>	getInstanceGroupIdMapping()
void	onInstanceConfigChange(List<org.apache.helix.model.InstanceConfig> instanceConfigs, org.apache.helix.NotificationContext context)	This function will assign a unique group id per group.
void	refresh()

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_INSTANCE_GROUP_ID

public static final int DEFAULT_INSTANCE_GROUP_ID

See Also:

• Constant Field Values

GROUP_FIELD_NAME_IN_DOMAIN

public static final String GROUP_FIELD_NAME_IN_DOMAIN

See Also:

• Constant Field Values

ZONE_FIELD_NAME_IN_DOMAIN

public static final String ZONE_FIELD_NAME_IN_DOMAIN

See Also:

• Constant Field Values

Constructor Details

HelixInstanceConfigRepository

public HelixInstanceConfigRepository(SafeHelixManager manager,
 boolean useGroupFieldInDomain)

Method Details

refresh

public void refresh()

Specified by:

refresh in interface VeniceResource

clear

public void clear()

Specified by:

clear in interface VeniceResource

getInstanceGroupId

public int getInstanceGroupId(String instanceId)

getInstanceGroupIdMapping

public Map<String,Integer> getInstanceGroupIdMapping()

getGroupCount

public int getGroupCount()

onInstanceConfigChange

public void onInstanceConfigChange(List<org.apache.helix.model.InstanceConfig> instanceConfigs,
 org.apache.helix.NotificationContext context)

This function will assign a unique group id per group. If there is no group defined for some instances, this function will use empty string as the default.

Specified by:

onInstanceConfigChange in interface org.apache.helix.api.listeners.InstanceConfigChangeListener