Context.Key

java.lang.Object
- io.grpc.Context.Key<T>

Enclosing class:

Context
```
public static final class Context.Key<T>
extends java.lang.Object
```
Key for indexing values stored in a context. Keys use reference equality and Context does not provide a mechanism to loop over Keys. This means there is no way to access a Key's value from a Context without having access to the Key instance itself. This allows strong control over what code can get/set a key in the Context. For example, you might manage access to Key similar to a ThreadLocal using Java visibility (private/protected). Generally Keys are stored in static fields.

Field Summary

Fields
Modifier and Type Field Description

private T defaultValue

private java.lang.String name

Constructor Summary

Constructors
Constructor Description

Key(java.lang.String name)

Key(java.lang.String name, T defaultValue)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`T`	`get()`	Get the value from the `Context.current()` context for this key.
`T`	`get(Context context)`	Get the value from the specified context for this key.
`java.lang.String`	`toString()`

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

Field Detail

name
```
private final java.lang.String name
```

defaultValue
```
private final T defaultValue
```

Constructor Detail

Key
```
Key(java.lang.String name)
```

Key

Key(java.lang.String name,
    T defaultValue)

Method Detail
- get
```
public T get()
```
  Get the value from the Context.current() context for this key.
- get
```
public T get(Context context)
```
  Get the value from the specified context for this key.
- toString
```
public java.lang.String toString()
```
  Overrides:
  
  toString in class java.lang.Object