PartitionAttributes

```
public interface PartitionAttributes
```
Provide a way to describe a partition using a collection of of attributes. Typically only a single type of any particular PartitionAttributes.Key exists in each PartitionAttributes. For example:
```
 { [Key(shard) = "shard X"], [Key(data center) = "data center X"], [Key(is main) = "false/true"] }
 
```
This construct allows for the attributes to partially specify a partition and preform "wild card" type matching.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class PartitionAttributes.Key<T>
A key identifies a specific object in a PartitionAttributes.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default <T> boolean`	`contains(PartitionAttributes.Key<T> key)`	Determine if there is a value associated with `key`.
`void`	`forEach(java.util.function.BiConsumer<PartitionAttributes.Key,java.lang.Object> action)`	Iterate over the key/value pairs in this collection.
`<T> T`	`get(PartitionAttributes.Key<T> key)`	Get the value associated with `key`.
`boolean`	`isEmpty()`	Determine if there are no key/value pairs in this collection.
`int`	`size()`	Determine how many key/value pairs are contained in this collection.

- Method Detail
  - get
```
@Nullable
<T> T get(PartitionAttributes.Key<T> key)
```
    Get the value associated with key.
    
    Type Parameters:
    
    T - The expected value type associated with key.
    
    Parameters:
    
    key - The key to lookup.
    
    Returns:
    
    the value associated with key, or null.
  - contains
```
default <T> boolean contains(PartitionAttributes.Key<T> key)
```
    Determine if there is a value associated with key.
    
    Type Parameters:
    
    T - The expected value type associated with key.
    
    Parameters:
    
    key - The key to check if there is any associated value for.
    
    Returns:
    
    true if there is a value associated with key.
  - forEach
```
void forEach(java.util.function.BiConsumer<PartitionAttributes.Key,java.lang.Object> action)
```
    Iterate over the key/value pairs in this collection.
    
    Parameters:
    
    action - Invoked for each key/value pair in this collection.
  - size
```
int size()
```
    Determine how many key/value pairs are contained in this collection.
    
    Returns:
    
    the number of key/value pairs are contained in this collection.
  - isEmpty
```
boolean isEmpty()
```
    Determine if there are no key/value pairs in this collection.
    
    Returns:
    
    true if there are no key/value pairs in this collection.