Method attach

api/src/context/java/io/grpc/Context.java:426–432

Attach this context, thus enter a new scope within which this context is #current. The previously current context is returned. It is allowed to attach contexts where #isCancelled() is true. Instead of using attach() and #detach(Context) most use-cases are

()

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   */
  public Context attach() {
    Context prev = storage().doAttach(this);
    if (prev == null) {
      return ROOT;
    }
    return prev;
  }

  /**
   * Reverse an {@code attach()}, restoring the previous context and exiting the current scope.