Context.Storage (io.grpc.grpc-context)

java.lang.Object
- io.grpc.Context.Storage

Enclosing class:

Context
```
public abstract static class Context.Storage
extends java.lang.Object
```
Defines the mechanisms for attaching and detaching the "current" context. The constructor for extending classes must not trigger any activity that can use Context, which includes logging, otherwise it can trigger an infinite initialization loop. Extending classes must not assume that only one instance will be created; Context guarantees it will only use one instance, but it may create multiple and then throw away all but one.
The default implementation will put the current context in a ThreadLocal. If an alternative implementation named io.grpc.override.ContextStorageOverride exists in the classpath, it will be used instead of the default implementation.
This API is experimental and subject to change.

Constructor Summary

Constructors
Constructor Description

Storage()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`attach(Context toAttach)`	Deprecated. This is an old API that is no longer used.
`abstract Context`	`current()`	Implements `Context.current()`.
`abstract void`	`detach(Context toDetach, Context toRestore)`	Implements `Context.detach(io.grpc.Context)`
`Context`	`doAttach(Context toAttach)`	Implements `Context.attach()`.

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

- Constructor Detail
  - Storage
```
public Storage()
```
- Method Detail
  - attach
```
@Deprecated
public void attach(Context toAttach)
```
    Deprecated.
    This is an old API that is no longer used.
  - doAttach
```
public Context doAttach(Context toAttach)
```
    Implements Context.attach().
    Caution: Context.attach() interprets a return value of null to mean the same thing as Context.ROOT.
    See also: current().
    
    Parameters:
    
    toAttach - the context to be attached
    
    Returns:
    
    A Context that should be passed back into detach(Context, Context) as the toRestore parameter. null is a valid return value, but see caution note.
  - detach
```
public abstract void detach(Context toDetach,
                            Context toRestore)
```
    Implements Context.detach(io.grpc.Context)
    
    Parameters:
    
    toDetach - the context to be detached. Should be, or be equivalent to, the current context of the current scope
    
    toRestore - the context to be the current. Should be, or be equivalent to, the context of the outer scope
  - current
```
public abstract Context current()
```
    Implements Context.current().
    Caution: Context interprets a return value of null to mean the same thing as Context{@link #ROOT}.
    See also doAttach(Context).
    
    Returns:
    
    The context of the current scope. null is a valid return value, but see caution note.