org.zalando.fahrschein

Class SimplePartitionManager

java.lang.Object

org.zalando.fahrschein.SimplePartitionManager

All Implemented Interfaces:

PartitionManager

Direct Known Subclasses:

InMemoryPartitionManager

public abstract class SimplePartitionManager
extends Object
implements PartitionManager

Constructor Summary

Constructors

Constructor and Description
SimplePartitionManager()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	acquireLock(String eventName, String lockedBy)
Optional<Lock>	lockPartitions(String eventName, List<Partition> partitions, String lockedBy) Locks partitions for one event.
protected abstract void	releaseLock(String eventName, String lockedBy)
void	unlockPartitions(Lock lock) Unlocks previously locked partitions.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimplePartitionManager

public SimplePartitionManager()

Method Detail

acquireLock

protected abstract boolean acquireLock(String eventName,
                                       String lockedBy)

releaseLock

protected abstract void releaseLock(String eventName,
                                    String lockedBy)

lockPartitions

public Optional<Lock> lockPartitions(String eventName,
                                     List<Partition> partitions,
                                     String lockedBy)

Description copied from interface: PartitionManager

Locks partitions for one event. When running consumers on multiple nodes they should try to lock partitions so that events are only processed by one consumer.

Specified by:

lockPartitions in interface PartitionManager

Parameters:

eventName - Name of the event

partitions - The partitions to lock

lockedBy - Name of one node of the consuming application

Returns:

A Lock instance containing the list of locked partitions if locking succeeded, Optional.empty() otherwise

unlockPartitions

public void unlockPartitions(Lock lock)

Description copied from interface: PartitionManager

Unlocks previously locked partitions.

Specified by:

unlockPartitions in interface PartitionManager

Parameters:

lock - The lock object returned from PartitionManager.lockPartitions(String, List, String)