kafka StringDeserializer 源码

  • 2022-10-20
  • 浏览 (452)

kafka StringDeserializer 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/serialization/StringDeserializer.java

/*
 * 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.common.serialization;

import org.apache.kafka.common.errors.SerializationException;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.Map;

/**
 *  String encoding defaults to UTF8 and can be customized by setting the property key.deserializer.encoding,
 *  value.deserializer.encoding or deserializer.encoding. The first two take precedence over the last.
 */
public class StringDeserializer implements Deserializer<String> {
    private String encoding = StandardCharsets.UTF_8.name();

    @Override
    public void configure(Map<String, ?> configs, boolean isKey) {
        String propertyName = isKey ? "key.deserializer.encoding" : "value.deserializer.encoding";
        Object encodingValue = configs.get(propertyName);
        if (encodingValue == null)
            encodingValue = configs.get("deserializer.encoding");
        if (encodingValue instanceof String)
            encoding = (String) encodingValue;
    }

    @Override
    public String deserialize(String topic, byte[] data) {
        try {
            if (data == null)
                return null;
            else
                return new String(data, encoding);
        } catch (UnsupportedEncodingException e) {
            throw new SerializationException("Error when deserializing byte[] to string due to unsupported encoding " + encoding);
        }
    }
}

相关信息

kafka 源码目录

相关文章

kafka ByteArrayDeserializer 源码

kafka ByteArraySerializer 源码

kafka ByteBufferDeserializer 源码

kafka ByteBufferSerializer 源码

kafka BytesDeserializer 源码

kafka BytesSerializer 源码

kafka Deserializer 源码

kafka DoubleDeserializer 源码

kafka DoubleSerializer 源码

kafka FloatDeserializer 源码

0  赞