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72 lines
2.7 KiB
Java
72 lines
2.7 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.poll;
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import static google.registry.model.eppoutput.Result.Code.SuccessWithAckMessage;
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import static google.registry.model.eppoutput.Result.Code.SuccessWithNoMessages;
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import static google.registry.model.ofy.ObjectifyService.ofy;
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import static google.registry.util.CollectionUtils.forceEmptyToNull;
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import com.googlecode.objectify.Key;
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import google.registry.flows.EppException;
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import google.registry.flows.EppException.ParameterValueSyntaxErrorException;
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import google.registry.model.eppoutput.EppOutput;
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import google.registry.model.poll.MessageQueueInfo;
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import google.registry.model.poll.PollMessage;
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import java.util.List;
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import javax.inject.Inject;
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/**
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* An EPP flow for requesting poll messages.
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*
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* @error {@link PollRequestFlow.UnexpectedMessageIdException}
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*/
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public class PollRequestFlow extends PollFlow {
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@Inject PollRequestFlow() {}
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@Override
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public final EppOutput run() throws EppException {
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if (command.getMessageId() != null) {
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throw new UnexpectedMessageIdException();
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}
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List<Key<PollMessage>> pollMessageKeys = getMessageQueueKeysInOrder();
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// Retrieve the oldest message from the queue that still exists -- since the query is eventually
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// consistent, it may return keys to some entities that no longer exist.
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for (Key<PollMessage> key : pollMessageKeys) {
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PollMessage pollMessage = ofy().load().key(key).now();
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if (pollMessage != null) {
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return createOutput(
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SuccessWithAckMessage,
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MessageQueueInfo.create(
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pollMessage.getEventTime(),
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pollMessage.getMsg(),
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pollMessageKeys.size(),
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PollMessage.EXTERNAL_KEY_CONVERTER.convert(key)),
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forceEmptyToNull(pollMessage.getResponseData()),
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forceEmptyToNull(pollMessage.getResponseExtensions()));
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}
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}
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return createOutput(SuccessWithNoMessages);
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}
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/** Unexpected message id. */
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static class UnexpectedMessageIdException extends ParameterValueSyntaxErrorException {
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public UnexpectedMessageIdException() {
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super("Unexpected message id");
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}
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}
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}
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