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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.config.provision;
/**
* A deployment of an application
*
* @author bratseth
*/
public interface Deployment {
/**
* Prepares activation of this deployment.
* This will do all validation and preparatory steps in the system such that a subsequent activation should
* be fast and error free.
*/
void prepare();
/**
* Activates this deployment. This will prepare it if necessary.
*
* @return the application config generation that became active by this invocation
*/
long activate();
/**
* Request a restart of services of this application on hosts matching the filter.
* This is sometimes needed after activation, but can also be requested without
* doing prepare and activate in the same session.
*/
void restart(HostFilter filter);
}
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