mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/flows/host/HostDeleteFlow.java

@@ -0,0 +1,87 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// 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 com.google.domain.registry.flows.host;
+
+import static com.google.domain.registry.model.EppResourceUtils.queryDomainsUsingResource;
+import static com.google.domain.registry.model.ofy.ObjectifyService.ofy;
+
+import com.google.common.base.Predicate;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Iterables;
+import com.google.domain.registry.config.RegistryEnvironment;
+import com.google.domain.registry.flows.EppException;
+import com.google.domain.registry.flows.ResourceAsyncDeleteFlow;
+import com.google.domain.registry.flows.async.AsyncFlowUtils;
+import com.google.domain.registry.flows.async.DeleteEppResourceAction;
+import com.google.domain.registry.flows.async.DeleteHostResourceAction;
+import com.google.domain.registry.model.domain.DomainBase;
+import com.google.domain.registry.model.domain.ReferenceUnion;
+import com.google.domain.registry.model.host.HostCommand.Delete;
+import com.google.domain.registry.model.host.HostResource;
+import com.google.domain.registry.model.host.HostResource.Builder;
+import com.google.domain.registry.model.reporting.HistoryEntry;
+
+import com.googlecode.objectify.Key;
+
+/**
+ * An EPP flow that deletes a host resource.
+ *
+ * @error {@link com.google.domain.registry.flows.ResourceAsyncDeleteFlow.ResourceToDeleteIsReferencedException}
+ * @error {@link com.google.domain.registry.flows.ResourceFlowUtils.ResourceNotOwnedException}
+ * @error {@link com.google.domain.registry.flows.ResourceMutateFlow.ResourceToMutateDoesNotExistException}
+ * @error {@link com.google.domain.registry.flows.SingleResourceFlow.ResourceStatusProhibitsOperationException}
+ */
+public class HostDeleteFlow extends ResourceAsyncDeleteFlow<HostResource, Builder, Delete> {
+
+  /** In {@link #isLinkedForFailfast}, check this (arbitrary) number of resources from the query. */
+  private static final int FAILFAST_CHECK_COUNT = 5;
+
+  @Override
+  protected boolean isLinkedForFailfast(final ReferenceUnion<HostResource> ref) {
+    // Query for the first few linked domains, and if found, actually load them. The query is
+    // eventually consistent and so might be very stale, but the direct load will not be stale,
+    // just non-transactional. If we find at least one actual reference then we can reliably
+    // fail. If we don't find any, we can't trust the query and need to do the full mapreduce.
+    return Iterables.any(
+        ofy().load().keys(
+            queryDomainsUsingResource(
+                  HostResource.class, ref.getLinked(), now, FAILFAST_CHECK_COUNT)).values(),
+        new Predicate<DomainBase>() {
+            @Override
+            public boolean apply(DomainBase domain) {
+              return domain.getNameservers().contains(ref);
+            }});
+  }
+
+  /** Enqueues a host resource deletion on the mapreduce queue. */
+  @Override
+  protected final void enqueueTasks() throws EppException {
+    AsyncFlowUtils.enqueueMapreduceAction(
+        DeleteHostResourceAction.class,
+        ImmutableMap.of(
+            DeleteEppResourceAction.PARAM_RESOURCE_KEY,
+            Key.create(existingResource).getString(),
+            DeleteEppResourceAction.PARAM_REQUESTING_CLIENT_ID,
+            getClientId(),
+            DeleteEppResourceAction.PARAM_IS_SUPERUSER,
+            Boolean.toString(superuser)),
+        RegistryEnvironment.get().config().getAsyncDeleteFlowMapreduceDelay());
+  }
+
+  @Override
+  protected final HistoryEntry.Type getHistoryEntryType() {
+    return HistoryEntry.Type.HOST_PENDING_DELETE;
+  }
+}