kafka ApiRequestScope 源码
kafka ApiRequestScope 代码
文件路径：/clients/src/main/java/org/apache/kafka/clients/admin/internals/ApiRequestScope.java
/*
* 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.kafka.clients.admin.internals;
import java.util.OptionalInt;
/**
* This interface is used by {@link AdminApiDriver} to bridge the gap
* to the internal `NodeProvider` defined in
* {@link org.apache.kafka.clients.admin.KafkaAdminClient}. However, a
* request scope is more than just a target broker specification. It also
* provides a way to group key lookups according to different batching
* mechanics. See {@link AdminApiLookupStrategy#lookupScope(Object)} for
* more detail.
*/
public interface ApiRequestScope {
/**
* Get the target broker ID that a request is intended for or
* empty if the request can be sent to any broker.
*
* Note that if the destination broker ID is present in the
* {@link ApiRequestScope} returned by {@link AdminApiLookupStrategy#lookupScope(Object)},
* then no lookup will be attempted.
*
* @return optional broker ID
*/
default OptionalInt destinationBrokerId() {
return OptionalInt.empty();
}
}
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