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Added new VolumeDetached predicate for EBS support
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package com.gravitant.cloud.adapters.provision.providers;
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/**
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* Licensed to jclouds, Inc. (jclouds) under one or more
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* contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. jclouds licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import javax.annotation.Resource;
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import javax.inject.Singleton;
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import org.jclouds.ec2.domain.Attachment;
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import org.jclouds.ec2.domain.Volume;
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import org.jclouds.ec2.services.ElasticBlockStoreClient;
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import org.jclouds.logging.Logger;
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import com.google.common.base.Predicate;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Sets;
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import com.google.inject.Inject;
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/**
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*
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* Tests to see if a volume is detached.
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*
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* @author Karthik Arunachalam
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*/
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@Singleton
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public class VolumeDetached implements Predicate<Attachment> {
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private final ElasticBlockStoreClient client;
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@Resource
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protected Logger logger = Logger.NULL;
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@Inject
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public VolumeDetached(ElasticBlockStoreClient client) {
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this.client = client;
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}
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public boolean apply(Attachment attachment) {
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logger.trace("looking for volume %s", attachment.getVolumeId());
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Volume volume = Iterables.getOnlyElement(client.describeVolumesInRegion(attachment
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.getRegion(), attachment.getVolumeId()));
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/*If attachment size is 0 volume is detached for sure.*/
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if (volume.getAttachments().size() == 0) {
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return true;
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}
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/* But if attachment size is > 0, then the attachment could be in any state.
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* So we need to check if the status is DETACHED (return true) or not (return false).
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*/
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Attachment lastAttachment = Sets.newTreeSet(volume.getAttachments()).last();
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logger.trace("%s: looking for status %s: currently: %s", lastAttachment,
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Attachment.Status.DETACHED, lastAttachment.getStatus());
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return lastAttachment.getStatus() == Attachment.Status.DETACHED;
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}
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}
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