#  BSD 3-Clause License
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#  Copyright (c) 2019, Elasticsearch BV
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#    list of conditions and the following disclaimer.
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from typing import TYPE_CHECKING

if TYPE_CHECKING:
    import elasticapm.traces


class BaseContext(object):
    def set_transaction(self, transaction: "elasticapm.traces.Transaction") -> None:
        """
        Set the transaction for the current execution context
        """
        raise NotImplementedError

    def get_transaction(self, clear: bool = False) -> "elasticapm.traces.Transaction":
        """
        Get the transaction for the current execution context

        If clear=True, also set the transaction to None for the current
        execution context.
        """
        raise NotImplementedError

    def set_span(self, span: "elasticapm.traces.Span") -> None:
        """
        Set the active span for the current execution context.

        The previously-activated span will be saved to be re-activated later.
        """
        raise NotImplementedError

    def get_span(self) -> "elasticapm.traces.Span":
        """
        Get the active span for the current execution context.
        """
        raise NotImplementedError

    def unset_span(self, clear_all: bool = False) -> "elasticapm.traces.Span":
        """
        De-activate the current span. If a span was previously active, it will
        become active again.

        Returns the deactivated span.

        If clear_all=True, all spans will be cleared and no span will be active.
        """
        raise NotImplementedError