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...est/java/org/apache/hadoop/hdfs/server/federation/store/records/MockStateStoreDriver.java
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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.hadoop.hdfs.server.federation.store.records; | ||
|
|
||
| import org.apache.hadoop.hdfs.server.federation.store.StateStoreUtils; | ||
| import org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreBaseImpl; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * A mock StateStoreDriver that runs in memory that can force IOExceptions | ||
| * upon demand. | ||
| */ | ||
| public class MockStateStoreDriver extends StateStoreBaseImpl { | ||
| boolean giveErrors = false; | ||
| boolean initialized = false; | ||
| Map<String, Map<String, BaseRecord>> valueMap = new HashMap<>(); | ||
|
|
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| @Override | ||
| public boolean initDriver() { | ||
| initialized = true; | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public <T extends BaseRecord> boolean initRecordStorage(String className, | ||
| Class<T> clazz) { | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public boolean isDriverReady() { | ||
| return initialized; | ||
| } | ||
|
|
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| @Override | ||
| public void close() throws Exception { | ||
| valueMap.clear(); | ||
| initialized = false; | ||
| } | ||
|
|
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| private void checkErrors() throws IOException { | ||
| if (giveErrors) { | ||
| throw new IOException("Induced errors"); | ||
| } | ||
| } | ||
|
|
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| @Override | ||
| @SuppressWarnings({"rawtypes"}) | ||
| public <T extends BaseRecord> QueryResult get(Class<T> clazz) throws IOException { | ||
| checkErrors(); | ||
| Map<String, BaseRecord> map = valueMap.get(StateStoreUtils.getRecordName(clazz)); | ||
| List<BaseRecord> results = map != null ? new ArrayList<>(map.values()) : new ArrayList<>(); | ||
| return new QueryResult<>(results, System.currentTimeMillis()); | ||
| } | ||
|
|
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| @Override | ||
| public <T extends BaseRecord> boolean putAll(List<T> records, | ||
| boolean allowUpdate, | ||
| boolean errorIfExists) | ||
| throws IOException { | ||
| checkErrors(); | ||
| for (T record : records) { | ||
| Map<String, BaseRecord> map = | ||
| valueMap.computeIfAbsent(StateStoreUtils.getRecordName(record.getClass()), | ||
| k -> new HashMap<>()); | ||
| String key = record.getPrimaryKey(); | ||
| BaseRecord oldRecord = map.get(key); | ||
| if (oldRecord == null || allowUpdate) { | ||
| map.put(key, record); | ||
| } else if (errorIfExists) { | ||
| throw new IOException("Record already exists for " + record.getClass() | ||
| + ": " + key); | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public <T extends BaseRecord> boolean removeAll(Class<T> clazz) throws IOException { | ||
| checkErrors(); | ||
| return valueMap.remove(StateStoreUtils.getRecordName(clazz)) != null; | ||
| } | ||
|
|
||
| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public <T extends BaseRecord> int remove(Class<T> clazz, | ||
| Query<T> query) | ||
| throws IOException { | ||
| checkErrors(); | ||
| int result = 0; | ||
| Map<String, BaseRecord> map = | ||
| valueMap.get(StateStoreUtils.getRecordName(clazz)); | ||
| if (map != null) { | ||
| for (Iterator<BaseRecord> itr = map.values().iterator(); itr.hasNext(); ) { | ||
| BaseRecord record = itr.next(); | ||
| if (query.matches((T) record)) { | ||
| itr.remove(); | ||
| result += 1; | ||
| } | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
| } |
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