| /* |
| * 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.samza.sql.system; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| import org.apache.samza.Partition; |
| import org.apache.samza.config.Config; |
| import org.apache.samza.system.StreamSpec; |
| import org.apache.samza.system.SystemAdmin; |
| import org.apache.samza.system.SystemStreamMetadata; |
| import org.apache.samza.system.SystemStreamPartition; |
| |
| import static org.apache.samza.system.IncomingMessageEnvelope.*; |
| |
| |
| public class SimpleSystemAdmin implements SystemAdmin { |
| |
| public SimpleSystemAdmin(Config config) { |
| } |
| |
| @Override |
| public Map<SystemStreamPartition, String> getOffsetsAfter(Map<SystemStreamPartition, String> offsets) { |
| return offsets.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, null)); |
| } |
| |
| @Override |
| public Map<String, SystemStreamMetadata> getSystemStreamMetadata(Set<String> streamNames) { |
| return streamNames.stream() |
| .collect(Collectors.toMap(Function.identity(), streamName -> new SystemStreamMetadata(streamName, |
| Collections.singletonMap(new Partition(0), |
| new SystemStreamMetadata.SystemStreamPartitionMetadata(null, END_OF_STREAM_OFFSET, null))))); |
| } |
| |
| @Override |
| public Integer offsetComparator(String offset1, String offset2) { |
| if (offset1 == null) { |
| return offset2 == null ? 0 : -1; |
| } else if (offset2 == null) { |
| return 1; |
| } |
| return offset1.compareTo(offset2); |
| } |
| |
| @Override |
| public boolean createStream(StreamSpec streamSpec) { |
| // Do nothing. |
| return true; |
| } |
| } |