config-model-api/src/main/java/com/yahoo/config/model/api/FileDistribution.java


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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.api;

import com.yahoo.config.FileReference;
import com.yahoo.vespa.defaults.Defaults;

import java.io.File;
import java.util.Collection;
import java.util.Set;

/**
 * Interface for models towards filedistribution.
 *
 * @author Ulf Lilleengen
 */
public interface FileDistribution {

    void sendDeployedFiles(String hostName, Set<FileReference> fileReferences);

    /**
     * Notifies client which file references to download. Used to start downloading early (while
     * preparing application package).
     *
     * @param hostName       host which should be notified about file references to download
     * @param fileReferences set of file references to start downloading
     */
    // TODO: Remove when 6.197 is the last version in use
    void startDownload(String hostName, Set<FileReference> fileReferences);

    /**
     * Notifies client which file references to download. Used to start downloading early (while
     * preparing application package).
     *
     * @param hostName       host which should be notified about file references to download
     * @param port           port which should be used when notifying
     * @param fileReferences set of file references to start downloading
     */
    void startDownload(String hostName, int port, Set<FileReference> fileReferences);

    void reloadDeployFileDistributor();

    void removeDeploymentsThatHaveDifferentApplicationId(Collection<String> targetHostnames);

    static String getDefaultFileDBRoot() {
        return Defaults.getDefaults().underVespaHome("var/db/vespa/filedistribution");
    }

    static File getDefaultFileDBPath() {
        return new File(getDefaultFileDBRoot());
    }

}