models.RollerDeploymentPrep Maven / Gradle / Ivy
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/**
* Copyright 2015 Groupon.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package models;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
/**
* Implementation of a deployment prep stage for Roller.
*
* @author Brandon Arp (barp at groupon dot com)
*/
public class RollerDeploymentPrep {
/**
* Create a {@link DeploymentDescription} from a {@link Stage} and a {@link Manifest}.
* @param stage the stage
* @param proposedManifest the manifest
* @return a deployment description
*/
public DeploymentDescription getDeploymentDescription(final Stage stage, final Manifest proposedManifest) {
final Manifest oldManifest = ManifestHistory.getCurrentForStage(stage).getManifest();
final DeploymentDiff diff = new DeploymentDiff(oldManifest, proposedManifest);
final List hosts = stage.getHostclasses()
.stream()
.flatMap(hc -> hc.getHosts().stream())
.distinct()
.sorted(Comparator.comparing(Host::getName))
.collect(Collectors.toList());
return new DeploymentDescription.Builder()
.setDeploymentDiff(diff)
.setHosts(hosts)
.build();
}
}