package org.apache.helix.store;
/*
* 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.
*/
import java.io.ByteArrayInputStream;
import java.io.StringWriter;
import org.apache.helix.HelixException;
import org.apache.helix.ZNRecord;
import org.apache.log4j.Logger;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
public class PropertyJsonSerializer<T> implements PropertySerializer<T>
{
static private Logger LOG = Logger.getLogger(PropertyJsonSerializer.class);
private final Class<T> _clazz;
public PropertyJsonSerializer(Class<T> clazz)
{
_clazz = clazz;
}
@Override
public byte[] serialize(T data) throws PropertyStoreException
{
ObjectMapper mapper = new ObjectMapper();
SerializationConfig serializationConfig = mapper.getSerializationConfig();
serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
serializationConfig.set(SerializationConfig.Feature.AUTO_DETECT_FIELDS, true);
serializationConfig.set(SerializationConfig.Feature.CAN_OVERRIDE_ACCESS_MODIFIERS,
true);
StringWriter sw = new StringWriter();
try
{
mapper.writeValue(sw, data);
if (sw.toString().getBytes().length > ZNRecord.SIZE_LIMIT)
{
throw new HelixException("Data size larger than 1M. Write empty string to zk.");
}
return sw.toString().getBytes();
}
catch (Exception e)
{
LOG.error("Error during serialization of data (first 1k): "
+ sw.toString().substring(0, 1024), e);
}
return new byte[] {};
}
@Override
public T deserialize(byte[] bytes) throws PropertyStoreException
{
ObjectMapper mapper = new ObjectMapper();
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
DeserializationConfig deserializationConfig = mapper.getDeserializationConfig();
deserializationConfig.set(DeserializationConfig.Feature.AUTO_DETECT_FIELDS, true);
deserializationConfig.set(DeserializationConfig.Feature.AUTO_DETECT_SETTERS, true);
deserializationConfig.set(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES,
true);
try
{
T value = mapper.readValue(bais, _clazz);
return value;
}
catch (Exception e)
{
LOG.error("Error during deserialization of bytes: " + new String(bytes), e);
}
return null;
}
}