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tejaskriya
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77 changes: 77 additions & 0 deletions
77
hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/utils/CodecFactory.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. | ||
| */ | ||
|
|
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| package org.apache.hadoop.ozone.utils; | ||
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| import com.fasterxml.jackson.annotation.JsonInclude; | ||
| import com.fasterxml.jackson.databind.DeserializationFeature; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import org.apache.hadoop.hdds.utils.db.Codec; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.io.IOException; | ||
|
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| /** | ||
| * Creates Codec for a given type class. | ||
| */ | ||
| public class CodecFactory { | ||
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| private static final Logger LOG = LoggerFactory.getLogger( | ||
| CodecFactory.class); | ||
| public static final class MyCodec<T> implements Codec<T> { | ||
|
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| private static final ObjectMapper MAPPER = new ObjectMapper() | ||
| .setSerializationInclusion(JsonInclude.Include.NON_NULL) | ||
| .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); | ||
|
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| private final Class<T> typeClass; | ||
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| public MyCodec(Class<T> typeClass) { | ||
| this.typeClass = typeClass; | ||
| } | ||
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| @Override | ||
| public Class<T> getTypeClass() { | ||
| return typeClass; | ||
| } | ||
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| @Override | ||
| public byte[] toPersistedFormat(T object) | ||
| throws IOException { | ||
| return MAPPER.writeValueAsBytes(object); | ||
| } | ||
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| @Override | ||
| public T fromPersistedFormat(byte[] rawData) | ||
| throws IOException { | ||
| return MAPPER.readValue(rawData, typeClass); | ||
| } | ||
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| @Override | ||
| public T copyObject(T object) { | ||
| return object; | ||
| } | ||
| } | ||
| public static <T> MyCodec<T> createCodec(String className) throws ClassNotFoundException { | ||
| LOG.info("tej creating codec for: " + className); | ||
| Class<T> clazz = (Class<T>) Class.forName(className); | ||
| return new MyCodec<>(clazz); | ||
| } | ||
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| } |
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