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/*
* 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.apache.dubbo.registry.xds.util.protocol;
import java.util.Set;
import java.util.function.Consumer;
public interface XdsProtocol {
/**
* Gets all {@link T resource} by the specified resource name.
* For LDS, the {@param resourceNames} is ignored
*
* @param resourceNames specified resource name
* @return resources, null if request failed
*/
T getResource(Set resourceNames);
/**
* Add a observer resource with {@link Consumer}
*
* @param resourceNames specified resource name
* @param consumer resource notifier, will be called when resource updated
* @return requestId, used when resourceNames update with {@link XdsProtocol#updateObserve(long, Set)}
*/
long observeResource(Set resourceNames, Consumer consumer);
/**
* Update observed resource list in {@link XdsProtocol#observeResource(Set, Consumer)}
*
* @param request requestId returned by {@link XdsProtocol#observeResource(Set, Consumer)}
* @param resourceNames new resource name list to observe
*/
void updateObserve(long request, Set resourceNames);
}