com.example.common.MoneyJacksonAutoConfiguration.java Source code

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Here is the source code for com.example.common.MoneyJacksonAutoConfiguration.java

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * Licensed 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 com.example.common;

import org.springframework.cloud.stream.converter.AbstractFromMessageConverter;
import org.springframework.cloud.stream.converter.MessageConverterUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.Message;
import org.springframework.util.MimeTypeUtils;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;

/**
 * @author Dave Syer
 *
 */
@Configuration
// TODO: make the streamy bits conditional
public class MoneyJacksonAutoConfiguration {

    @Bean
    public JodaMoneyModule jodaMoneyJacksonModule() {
        return new JodaMoneyModule();
    }

    @Bean
    public CustomJsonToPojoMessageConverter journalJacksonMessageConverter(ObjectMapper mapper) {
        return new CustomJsonToPojoMessageConverter(mapper);
    }

    @Bean
    public CustomPojoToJsonMessageConverter JournalJacksonSerializerMessageConverter(ObjectMapper mapper) {
        return new CustomPojoToJsonMessageConverter(mapper);
    }

}

class CustomPojoToJsonMessageConverter extends AbstractFromMessageConverter {

    private final ObjectMapper mapper;

    public CustomPojoToJsonMessageConverter(ObjectMapper mapper) {
        super(MimeTypeUtils.APPLICATION_JSON);
        this.mapper = mapper;
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        mapper.registerModule(new JodaMoneyModule());
    }

    @Override
    protected Class<?>[] supportedPayloadTypes() {
        return null;
    }

    @Override
    protected Class<?>[] supportedTargetTypes() {
        return new Class[] { String.class };
    }

    @Override
    public Object convertFromInternal(Message<?> message, Class<?> targetClass, Object conversionHint) {
        try {
            Object payload = message.getPayload();
            return mapper.writeValueAsString(payload);
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            return null;
        }
    }

}

class CustomJsonToPojoMessageConverter extends AbstractFromMessageConverter {

    private final ObjectMapper mapper;

    public CustomJsonToPojoMessageConverter(ObjectMapper mapper) {
        super(MimeTypeUtils.APPLICATION_JSON, MessageConverterUtils.X_JAVA_OBJECT);
        this.mapper = mapper;
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        mapper.registerModule(new JodaMoneyModule());
    }

    @Override
    protected Class<?>[] supportedPayloadTypes() {
        return new Class<?>[] { String.class, byte[].class };
    }

    @Override
    protected Class<?>[] supportedTargetTypes() {
        return null; // any type
    }

    @Override
    public Object convertFromInternal(Message<?> message, Class<?> targetClass, Object conversionHint) {
        Object result = null;
        try {
            Object payload = message.getPayload();

            if (payload instanceof byte[]) {
                result = mapper.readValue((byte[]) payload, targetClass);
            } else if (payload instanceof String) {
                result = mapper.readValue((String) payload, targetClass);
            }
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            return null;
        }
        return result;
    }

}

@SuppressWarnings("serial")
class SubtypeModule extends SimpleModule {
    private Class<?>[] subtypes;

    public SubtypeModule(Class<?>... subtypes) {
        this.subtypes = subtypes;
    }

    @Override
    public void setupModule(SetupContext context) {
        context.registerSubtypes(subtypes);
        super.setupModule(context);
    }
}