PartitionCoordinator 0.3.0 API

All Implemented Interfaces:
```
public final class PartitionCoordinator

                    
```
Coordinates partition assignment across multiple outbox processor instances.
Handles automatic rebalancing when instances join or leave the cluster, ensuring even distribution of partitions for optimal load balancing.

Since:

0.2.0

Author:

Roland Beisel

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description
`PartitionCoordinator(OutboxInstanceRegistry instanceRegistry)`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`final List<Integer>`	`getAssignedPartitions(String instanceId)`	Gets the partitions assigned to a specific instance.
`final Map<Integer, String>`	`getCurrentAssignments()`	Gets all current partition assignments.
`final String`	`getInstanceForPartition(Integer partition)`	Gets the instance ID that owns a specific partition.
`final Unit`	`checkForRebalancing()`	Checks if any partition assignments need to be updated.
`final PartitionStats`	`getPartitionStats()`	Gets statistics about current partition distribution.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PartitionCoordinator
```
PartitionCoordinator(OutboxInstanceRegistry instanceRegistry)
```
    Parameters:
    
    instanceRegistry - Registry for managing active instances
- Method Detail
  - getAssignedPartitions
```
 final List<Integer> getAssignedPartitions(String instanceId)
```
    Gets the partitions assigned to a specific instance.
    
    Parameters:
    
    instanceId - The instance ID to get partitions for
    
    Returns:
    
    List of partition numbers assigned to the instance
  - getCurrentAssignments
```
 final Map<Integer, String> getCurrentAssignments()
```
    Gets all current partition assignments.
    
    Returns:
    
    Map of partition number to instance ID
  - getInstanceForPartition
```
 final String getInstanceForPartition(Integer partition)
```
    Gets the instance ID that owns a specific partition.
    
    Parameters:
    
    partition - The partition number
    
    Returns:
    
    Instance ID that owns the partition, or null if not assigned
  - checkForRebalancing
```
@Scheduled(fixedRate = 15000) final Unit checkForRebalancing()
```
    Checks if any partition assignments need to be updated.
  - getPartitionStats
```
 final PartitionStats getPartitionStats()
```
    Gets statistics about current partition distribution.
    
    Returns:
    
    PartitionStats object with distribution information