/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.jclouds.openstack.marconi.v1.functions;
import com.google.common.base.Function;
import com.google.inject.Inject;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ParseJson;
import org.jclouds.openstack.marconi.v1.domain.Aged;
import org.jclouds.openstack.marconi.v1.domain.MessagesStats;
import org.jclouds.openstack.marconi.v1.domain.QueueStats;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.jclouds.openstack.marconi.v1.functions.ParseMessagesToStream.TO_ID_FROM_HREF;
/**
* This parses the stats of a queue.
*
* @author Everett
*/
public class ParseQueueStats implements Function<HttpResponse, QueueStats> {
private final ParseJson<QueueStats> json;
@Inject
ParseQueueStats(ParseJson<QueueStats> json) {
this.json = checkNotNull(json, "json");
}
public QueueStats apply(HttpResponse from) {
QueueStats rawQueueStats = json.apply(from);
if (rawQueueStats.getMessagesStats().getTotal() == 0) {
return rawQueueStats;
}
else {
// change the hrefs to ids
Aged oldestWithHref = rawQueueStats.getMessagesStats().getOldest().get();
Aged oldestWithId = oldestWithHref.toBuilder()
.id(TO_ID_FROM_HREF.apply(oldestWithHref.getId()))
.build();
Aged newestWithHref = rawQueueStats.getMessagesStats().getNewest().get();
Aged newestWithId = newestWithHref.toBuilder()
.id(TO_ID_FROM_HREF.apply(newestWithHref.getId()))
.build();
MessagesStats messagesStatsWithIds = rawQueueStats.getMessagesStats().toBuilder()
.oldest(oldestWithId)
.newest(newestWithId)
.build();
QueueStats queueStatsWithIds = rawQueueStats.toBuilder().messageStats(messagesStatsWithIds).build();
return queueStatsWithIds;
}
}
}