Package io.micrometer.context

@NullMarked package io.micrometer.context

This package contains abstractions and implementations for context propagation.

• ThreadLocalAccessor and ContextAccessor allow applications and frameworks to plug in support for ThreadLocal and other Map-like types of context such as the Project Reactor Contexts.
• ContextRegistry provides a static instance with global access to all known accessors that should be registered on startup.
• ContextSnapshot uses the ContextRegistry and is used to capture context values, and then propagate them from one type of context to another or from one thread to another.

Related Packages

Package	Description
io.micrometer.context.integration	This package contains useful integrations with external libraries that can be used provided those libraries are present at runtime.

Class	Description
ContextAccessor<READ,WRITE>	Contract to assist with access to an external, map-like context, such as the Project Reactor Context, including the ability to read values from it a Map and to write values to it from a Map.
ContextExecutorService<EXECUTOR extends ExecutorService>	Wraps an ExecutorService in order to capture context via ContextSnapshot when a task is submitted, and propagate context to the task when it is executed.
ContextRegistry	Registry that provides access to, instances of ContextAccessor and ThreadLocalAccessor.
ContextScheduledExecutorService	Wraps a ScheduledExecutorService in order to capture context via ContextSnapshot when a task is submitted, and propagate context to the task when it is executed.
ContextSnapshot	Holds values extracted from ThreadLocal and other types of context and exposes methods to propagate those values.
ContextSnapshot.Scope	An object to use to reset ThreadLocal values at the end of a context scope.
ContextSnapshotFactory	Factory for creating ContextSnapshot objects and restoring ThreadLocal values using a context object for which a ContextAccessor exists in the ContextRegistry.
ContextSnapshotFactory.Builder	Builder for ContextSnapshotFactory instances.
NonNullApi	Deprecated. Use NullMarked instead.
NonNullFields	Deprecated. Use NullMarked instead.
Nullable	Deprecated. Use Nullable instead.
ThreadLocalAccessor<V>	Contract to assist with setting and clearing a ThreadLocal.