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I am replacing an in-house caching system with memcached but memcached client cannot cache the JsonNode objects since they don't implement Serializable.
Is there any way you can achieve serializing a JsonNode object? Does Jackson provide Serializable equivalent of this class?
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Note that Jackson does not use java. io. Serializable for anything: there is no real value for adding that. It gets ignored.
Converting Java object to JSON In it, create an object of the POJO class, set required values to it using the setter methods. Instantiate the ObjectMapper class. Invoke the writeValueAsString() method by passing the above created POJO object. Retrieve and print the obtained JSON.
Jackson is a solid and mature JSON serialization/deserialization library for Java. The ObjectMapper API provides a straightforward way to parse and generate JSON response objects with a lot of flexibility.
A JsonNode is Jackson's tree model for JSON and it can read JSON into a JsonNode instance and write a JsonNode out to JSON. To read JSON into a JsonNode with Jackson by creating ObjectMapper instance and call the readValue() method. We can access a field, array or nested object using the get() method of JsonNode class.
JSON is best serialized by writing it out as bytes. In Jackson, it is done using ObjectMapper, for example by:
byte[] raw = objectMapper.writeValueAsBytes(root);
MemCache does not really need Serializable since it's all raw bytes; although Java clients may try to be helpful and handle serialization.
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