/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds licenses this file
* to you 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 org.jclouds.compute.predicates.internal;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Set;
import javax.inject.Singleton;
import org.jclouds.compute.domain.Image;
import org.jclouds.compute.domain.Image.Status;
import org.jclouds.compute.strategy.GetImageStrategy;
import com.google.common.collect.ImmutableSet;
import com.google.inject.Inject;
/**
*
* The point of RefreshAndDoubleCheckOnFailUnlessStateInvalid is to keep an atomic reference to a
* image, so as to eliminate a redundant {@link ComputeService#getImage} call after the
* predicate passes.
*
* @author Adrian Cole
*/
@Singleton
public class RefreshImageAndDoubleCheckOnFailUnlessStatusInvalid extends RefreshAndDoubleCheckOnFailUnlessStatusInvalid<Image.Status, Image> {
private final GetImageStrategy client;
@Inject
public RefreshImageAndDoubleCheckOnFailUnlessStatusInvalid(Status intended, GetImageStrategy client) {
this(intended, ImmutableSet.of(Status.ERROR), client);
}
public RefreshImageAndDoubleCheckOnFailUnlessStatusInvalid(Status intended, Set<Status> invalids,
GetImageStrategy client) {
super(intended, invalids);
this.client = checkNotNull(client, "client");
}
@Override
protected Image refreshOrNull(Image resource) {
if (resource == null || resource.getId() == null)
return null;
return client.getImage(resource.getId());
}
}