gistfile1.java

// Connect to your API with your http lib, i use http-request: https://github.com/kevinsawicki/http-request
// Then get the reader. The 'request' variable below is just a HttpRequest object 
// as shown here: http://kevinsawicki.github.io/http-request/
final Reader reader = request.reader(); 

final ObjectMapper mapper = new ObjectMapper(); 
final JsonFactory factory = mapper.getFactory();

// Create a new streaming parser with the reader
JsonParser jp = factory.createParser(reader);

// I'm working with a JSON Array that is returned from the API that I'm connecting to, so I need to advance the 
// parser to the start of the array.

// Advance stream to START_ARRAY first:
jp.nextToken();

// Parse each value by looking for each start object. The Mapper will read the object and advance the parser
// until it finds the END_OBJECT at which time the mapper then deserializes into a POJO. Then the loop will 
// continue to the next position. This will handle each JSON object as it becomes available and will be very 
// light on memory and high in performance. 
while(jp.nextToken() == JsonToken.START_OBJECT) {
    // Get customer POJO
    final Customer c = mapper.readValue(jp, Customer.class);

    // Update local db with customer info.
    myDataLayer.updateCustomer(c);
}