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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.deployment;
import com.yahoo.vespa.hosted.controller.api.integration.deployment.RunId;
import java.util.Optional;
/**
* Advances a given job run by running the appropriate {@link Step}s, based on their current status.
*
* When an attempt is made to advance a given job, a lock for that job (application and type) is
* taken, and released again only when the attempt finishes. Multiple other attempts may be made in
* the meantime, but they should give up unless the lock is promptly acquired.
*
* @author jonmv
*/
public interface StepRunner {
/** Attempts to run the given step in the given run, and returns the new status of the run, if the step completed. */
Optional<RunStatus> run(LockedStep step, RunId id);
}
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