ContextUtils

java.lang.Object
- io.opencensus.tags.unsafe.ContextUtils

```
public final class ContextUtils
extends java.lang.Object
```
Utility methods for accessing the TagContext contained in the Context.
Most code should interact with the current context via the public APIs in TagContext and avoid accessing TAG_CONTEXT_KEY directly.

Since:

0.8

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class ContextUtils.EmptyTagContext

Field Summary

Fields
Modifier and Type	Field	Description
`private static TagContext`	`EMPTY_TAG_CONTEXT`
`private static io.grpc.Context.Key<TagContext>`	`TAG_CONTEXT_KEY`	The `Context.Key` used to interact with the `TagContext` contained in the `Context`.

Constructor Summary

Constructors
Modifier Constructor Description

private ContextUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static TagContext`	`getValue(io.grpc.Context context)`	Returns the value from the specified `Context`.
`static io.grpc.Context`	`withValue(io.grpc.Context context, TagContext tagContext)`	Creates a new `Context` with the given value set.

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

- Field Detail
  - EMPTY_TAG_CONTEXT
```
private static final TagContext EMPTY_TAG_CONTEXT
```
  - TAG_CONTEXT_KEY
```
private static final io.grpc.Context.Key<TagContext> TAG_CONTEXT_KEY
```
    The Context.Key used to interact with the TagContext contained in the Context.
- Constructor Detail
  - ContextUtils
```
private ContextUtils()
```
- Method Detail
  - withValue
```
public static io.grpc.Context withValue(io.grpc.Context context,
                                        @Nullable
                                        TagContext tagContext)
```
    Creates a new Context with the given value set.
    
    Parameters:
    
    context - the parent Context.
    
    tagContext - the value to be set.
    
    Returns:
    
    a new context with the given value set.
    
    Since:
    
    0.21
  - getValue
```
public static TagContext getValue(io.grpc.Context context)
```
    Returns the value from the specified Context.
    
    Parameters:
    
    context - the specified Context.
    
    Returns:
    
    the value from the specified Context.
    
    Since:
    
    0.21