| /* |
| * 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.metadatastore; |
| |
| import com.google.common.collect.ImmutableMap; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| |
| /** |
| * In-memory {@link MetadataStore} with no persistence on disk. |
| */ |
| public class InMemoryMetadataStore implements MetadataStore { |
| |
| private final ConcurrentHashMap<String, byte[]> memStore = new ConcurrentHashMap<>(); |
| |
| @Override |
| public void init() { } |
| |
| @Override |
| public byte[] get(String key) { |
| return memStore.get(key); |
| } |
| |
| @Override |
| public void put(String key, byte[] value) { |
| memStore.put(key, value); |
| } |
| |
| @Override |
| public void delete(String key) { |
| memStore.remove(key); |
| } |
| |
| @Override |
| public Map<String, byte[]> all() { |
| return ImmutableMap.copyOf(memStore); |
| } |
| |
| @Override |
| public void flush() { } |
| |
| @Override |
| public void close() { } |
| } |