| /** |
| * 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; |
| |
| import org.apache.kafka.common.Node; |
| import org.apache.kafka.common.protocol.types.Struct; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A simple implementation of `MetadataUpdater` that returns the cluster nodes set via the constructor or via |
| * `setNodes`. |
| * |
| * This is useful in cases where automatic metadata updates are not required. An example is controller/broker |
| * communication. |
| * |
| * This class is not thread-safe! |
| */ |
| public class ManualMetadataUpdater implements MetadataUpdater { |
| |
| private List<Node> nodes; |
| |
| public ManualMetadataUpdater() { |
| this(new ArrayList<Node>(0)); |
| } |
| |
| public ManualMetadataUpdater(List<Node> nodes) { |
| this.nodes = nodes; |
| } |
| |
| public void setNodes(List<Node> nodes) { |
| this.nodes = nodes; |
| } |
| |
| @Override |
| public List<Node> fetchNodes() { |
| return new ArrayList<>(nodes); |
| } |
| |
| @Override |
| public boolean isUpdateDue(long now) { |
| return false; |
| } |
| |
| @Override |
| public long maybeUpdate(long now) { |
| return Long.MAX_VALUE; |
| } |
| |
| @Override |
| public boolean maybeHandleDisconnection(ClientRequest request) { |
| return false; |
| } |
| |
| @Override |
| public boolean maybeHandleCompletedReceive(ClientRequest request, long now, Struct body) { |
| return false; |
| } |
| |
| @Override |
| public void requestUpdate() { |
| // Do nothing |
| } |
| } |