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9a2afc7a9b
ReferenceUnion is a hack to work around the mismatch between how we store references (by roid) and how they are represented in EPP (by foreign key). If it ever needed to exist (not entirely clear...) it should have remained tightly scoped within the domain commands and resources. Instead it has leaked everywhere in the project, causing lots of boilerplate. This CL hides all of that behind standard Refs, and should be followed by work to remove ReferenceUnion completely. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=122424416
85 lines
3.2 KiB
Java
85 lines
3.2 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.flows;
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import static google.registry.model.eppoutput.Result.Code.SuccessWithActionPending;
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import static google.registry.model.ofy.ObjectifyService.ofy;
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import com.googlecode.objectify.Ref;
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import com.googlecode.objectify.Work;
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import google.registry.flows.EppException.AssociationProhibitsOperationException;
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import google.registry.model.EppResource;
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import google.registry.model.EppResource.Builder;
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import google.registry.model.eppcommon.StatusValue;
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import google.registry.model.eppinput.ResourceCommand.SingleResourceCommand;
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import google.registry.model.eppoutput.Result.Code;
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import google.registry.model.index.ForeignKeyIndex;
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/**
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* An EPP flow that deletes a resource asynchronously (i.e. via mapreduce).
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*
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* @param <R> the resource type being changed
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* @param <B> a builder for the resource
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* @param <C> the command type, marshalled directly from the epp xml
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*/
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public abstract class ResourceAsyncDeleteFlow
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<R extends EppResource, B extends Builder<R, ?>, C extends SingleResourceCommand>
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extends ResourceDeleteFlow<R, C> {
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@Override
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public void failfast() throws ResourceToDeleteIsReferencedException {
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// Enter a transactionless context briefly.
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boolean isLinked = ofy().doTransactionless(new Work<Boolean>() {
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@Override
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public Boolean run() {
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ForeignKeyIndex<R> fki = ForeignKeyIndex.load(resourceClass, targetId, now);
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if (fki == null) {
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// Don't failfast on non-existence. We could, but that would duplicate code paths in a way
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// that would be hard to reason about, and there's no real gain in doing so.
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return false;
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}
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return isLinkedForFailfast(fki.getReference());
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}
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});
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if (isLinked) {
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throw new ResourceToDeleteIsReferencedException();
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}
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}
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/** Subclasses must override this to check if the supplied reference has incoming links. */
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protected abstract boolean isLinkedForFailfast(Ref<R> ref);
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@Override
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protected final R createOrMutateResource() {
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@SuppressWarnings("unchecked")
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B builder = (B) existingResource.asBuilder().addStatusValue(StatusValue.PENDING_DELETE);
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return builder.build();
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}
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/** Subclasses can override this to return a different success result code. */
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@Override
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protected Code getDeleteResultCode() {
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return SuccessWithActionPending;
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}
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/** Resource to be deleted has active incoming references. */
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public static class ResourceToDeleteIsReferencedException
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extends AssociationProhibitsOperationException {
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public ResourceToDeleteIsReferencedException() {
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super("Resource to be deleted has active incoming references");
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}
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}
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}
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