Is it OK to use Gson instance as a static field in a model bean (reuse)?

Question

Here\'s the model I implemented:

public class LoginSession {
    private static final Gson gson = new Gson();

    private String id;
    private String name         


        

Answer 1

The core Gson class is thread-safe. I just encountered a thread-safety issue that was supposedly with GSON. The issue happened when using a custom JsonDeserializer and JsonSerializer for Date parsing and formatting. As it turned out, the thread-safety issue was with my method's use of a static SimpleDateFormat instance which is not thread-safe. Once I wrapped the static SimpleDateFormat in a ThreadLocal instance, everything worked out fine.