io.etcd.jetcd.watch.WatchResponse Maven / Gradle / Ivy
/*
* Copyright 2016-2021 The jetcd authors
*
* 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 io.etcd.jetcd.watch;
import java.util.List;
import java.util.stream.Collectors;
import com.google.common.annotations.VisibleForTesting;
import io.etcd.jetcd.AbstractResponse;
import io.etcd.jetcd.ByteSequence;
import io.etcd.jetcd.KeyValue;
import io.etcd.jetcd.api.Event;
public class WatchResponse extends AbstractResponse {
private List events;
private final ByteSequence namespace;
public WatchResponse(io.etcd.jetcd.api.WatchResponse response, ByteSequence namespace) {
super(response, response.getHeader());
this.namespace = namespace;
}
@VisibleForTesting
public WatchResponse(io.etcd.jetcd.api.WatchResponse response) {
this(response, ByteSequence.EMPTY);
}
/**
* convert API watch event to client event.
*/
private static WatchEvent toEvent(Event event, ByteSequence namespace) {
WatchEvent.EventType eventType;
switch (event.getType()) {
case DELETE:
eventType = WatchEvent.EventType.DELETE;
break;
case PUT:
eventType = WatchEvent.EventType.PUT;
break;
default:
eventType = WatchEvent.EventType.UNRECOGNIZED;
}
return new WatchEvent(new KeyValue(event.getKv(), namespace), new KeyValue(event.getPrevKv(), namespace), eventType);
}
public synchronized List getEvents() {
if (events == null) {
events = getResponse().getEventsList().stream().map(event -> WatchResponse.toEvent(event, namespace))
.collect(Collectors.toList());
}
return events;
}
public boolean isProgressNotify() {
return isProgressNotify(getResponse());
}
/**
* returns true if the WatchResponse is progress notification.
*/
public static boolean isProgressNotify(io.etcd.jetcd.api.WatchResponse response) {
return response.getEventsCount() == 0 && !response.getCreated() && !response.getCanceled()
&& response.getCompactRevision() == 0 && response.getHeader().getRevision() != 0;
}
}