/*************************************************************************
* Copyright 2009-2013 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
************************************************************************/
package com.eucalyptus.compute.common.internal.vm;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.PersistenceContext;
import javax.persistence.Table;
import com.eucalyptus.compute.common.CloudMetadata;
import com.eucalyptus.entities.Entities;
import com.eucalyptus.entities.TransactionException;
import com.eucalyptus.compute.common.internal.tags.Tag;
import com.eucalyptus.compute.common.internal.tags.TagSupport;
import com.eucalyptus.compute.common.internal.tags.Tags;
import com.eucalyptus.auth.principal.OwnerFullName;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
/**
*
*/
@Entity
@PersistenceContext( name = "eucalyptus_cloud" )
@Table( name = "metadata_tags_instances" )
@DiscriminatorValue( "instance" )
public class VmInstanceTag extends Tag<VmInstanceTag> {
private static final long serialVersionUID = 1L;
@JoinColumn( name = "metadata_tag_resource_id", updatable = false, nullable = false )
@ManyToOne( fetch = FetchType.LAZY )
private VmInstance instance;
protected VmInstanceTag() {
super( "instance", ResourceIdFunction.INSTANCE );
}
public VmInstanceTag( @Nonnull final VmInstance instance,
@Nonnull final OwnerFullName ownerFullName,
@Nullable final String key,
@Nullable final String value ) {
super( "instance", ResourceIdFunction.INSTANCE, ownerFullName, key, value );
setInstance( instance );
init();
}
public VmInstance getInstance() {
return instance;
}
public void setInstance( final VmInstance instance ) {
this.instance = instance;
}
@Nonnull
public static VmInstanceTag key( @Nonnull final String key ) {
Preconditions.checkNotNull( key, "key" );
final VmInstanceTag tag = new VmInstanceTag( );
tag.setKey( key );
return tag;
}
@Nonnull
public static Tag named( @Nonnull final VmInstance instance,
@Nonnull final OwnerFullName ownerFullName,
@Nullable final String key ) {
return namedWithValue( instance, ownerFullName, key, null );
}
@Nonnull
public static Tag namedWithValue( @Nonnull final VmInstance instance,
@Nonnull final OwnerFullName ownerFullName,
@Nullable final String key,
@Nullable final String value ) {
Preconditions.checkNotNull( instance, "instance" );
Preconditions.checkNotNull( ownerFullName, "ownerFullName" );
return new VmInstanceTag( instance, ownerFullName, key, value );
}
private enum ResourceIdFunction implements Function<VmInstanceTag,String> {
INSTANCE {
@Override
public String apply( final VmInstanceTag vmInstanceTag ) {
return vmInstanceTag.getInstance().getInstanceId();
}
}
}
public static final class VmInstanceTagSupport extends TagSupport {
public VmInstanceTagSupport() {
super( VmInstance.class, "i", "displayName", "instance", "InvalidInstanceID.NotFound", "The instance ID '%s' does not exist" );
}
@Override
public Tag createOrUpdate( final CloudMetadata metadata, final OwnerFullName ownerFullName, final String key, final String value ) {
return Tags.createOrUpdate( new VmInstanceTag( (VmInstance) metadata, ownerFullName, key, value ) );
}
@Override
public Tag example( @Nonnull final CloudMetadata metadata, @Nonnull final OwnerFullName ownerFullName, final String key, final String value ) {
return VmInstanceTag.namedWithValue( (VmInstance) metadata, ownerFullName, key, value );
}
@Override
public Tag example( @Nonnull final OwnerFullName ownerFullName ) {
return example( new VmInstanceTag(), ownerFullName );
}
@Override
public CloudMetadata lookup( final String identifier ) throws TransactionException {
return Entities.uniqueResult( VmInstance.named( identifier ) );
}
}
}