[Enhancement]: make execInContainer asynchronous

Module

Core

Proposal

In function org.testcontainers.containers.ExecInContainerPattern#execInContainer(com.github.dockerjava.api.DockerClient, com.github.dockerjava.api.command.InspectContainerResponse, java.nio.charset.Charset, java.lang.String...)

I found this part of code:

        try (FrameConsumerResultCallback callback = new FrameConsumerResultCallback()) {
            callback.addConsumer(OutputFrame.OutputType.STDOUT, stdoutConsumer);
            callback.addConsumer(OutputFrame.OutputType.STDERR, stderrConsumer);

            dockerClient.execStartCmd(execCreateCmdResponse.getId()).exec(callback).awaitCompletion();
        }

It seems like this part of code is producing the result in a synchronous and blocking pattern.

This seems to have the impact on the logging and makes it impossible to see the logs as they arrive.

Is it possible to make this asynchronous?

Inizia da org.testcontainers.containers.ExecInContainerPattern#execInContainer ed esamina il flusso mostrato di FrameConsumerResultCallback ed execStartCmd. Determina come l'esecuzione asincrona dovrebbe esporre l'output man mano che arriva senza bloccare, quindi verifica che il logging sia osservabile durante l'esecuzione e che il comportamento esistente del risultato dell'esecuzione continui a essere coperto.