Package org.apache.pinot.common.minion

Class MinionTaskMetadataUtils

java.lang.Object

org.apache.pinot.common.minion.MinionTaskMetadataUtils

public final class MinionTaskMetadataUtils
extends Object

Helper methods to fetch/persist ZNRecord for minion task metadata

Method Summary

Modifier and Type	Method	Description
static void	deleteTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore, String taskType, String tableNameWithType)	Deletes the ZNRecord for the given minion task and tableName, from both the new path MINION_TASK_METADATA/${tableNameWthType}/${taskType} and the old path MINION_TASK_METADATA/${taskType}/${tableNameWthType}.
static org.apache.helix.zookeeper.datamodel.ZNRecord	fetchTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore, String taskType, String tableNameWithType)	Fetches the ZNRecord for the given minion task and tableName.
static void	persistTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore, String taskType, BaseTaskMetadata taskMetadata, int expectedVersion)	Generic method for persisting BaseTaskMetadata to MINION_TASK_METADATA.

Methods inherited from class java.lang.Object

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

Method Detail

fetchTaskMetadata

@Nullable
public static org.apache.helix.zookeeper.datamodel.ZNRecord fetchTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore,
                                                                              String taskType,
                                                                              String tableNameWithType)

Fetches the ZNRecord for the given minion task and tableName. Fetch from the new path MINION_TASK_METADATA/${tableNameWthType}/{taskType} if it exists; otherwise, fetch from the old path MINION_TASK_METADATA/${taskType}/${tableNameWthType}.

deleteTaskMetadata

public static void deleteTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore,
                                      String taskType,
                                      String tableNameWithType)

Deletes the ZNRecord for the given minion task and tableName, from both the new path MINION_TASK_METADATA/${tableNameWthType}/${taskType} and the old path MINION_TASK_METADATA/${taskType}/${tableNameWthType}.

persistTaskMetadata

public static void persistTaskMetadata(org.apache.helix.store.HelixPropertyStore<org.apache.helix.zookeeper.datamodel.ZNRecord> propertyStore,
                                       String taskType,
                                       BaseTaskMetadata taskMetadata,
                                       int expectedVersion)

Generic method for persisting BaseTaskMetadata to MINION_TASK_METADATA. The metadata will be saved in the ZNode under the new path /MINION_TASK_METADATA/${tableNameWithType}/${taskType} if the old path already exists; otherwise, it will be saved in the ZNode under the old path /MINION_TASK_METADATA/${taskType}/${tableNameWithType}. Will fail if expectedVersion does not match. Set expectedVersion -1 to override version check.