First question based on your reply.
>>Usage of `DateFormat` itself is synchronized such that this aspect itself
is not problematic
The code synchronizes 'DateFormat' when mapping data across multiple
threads ? Where exactly is this done ?
Thanks,
Mohan
On Wednesday, 12 October 2016 03:07:41 UTC+5:30, Tatu Saloranta wrote:
>
> It means that `ObjectMapper` is only thread-safe when ALL configuration is
> done first, before any usage.
> This includes, but is not limited to, configuring default `DateFormat` to
> use.
> Usage of `DateFormat` itself is synchronized such that this aspect itself
> is not problematic, rather, settings of `ObjectMapper` are assumed to be
> fixed when first `readValue()` or `writeValue()` is done (*)
>
> So if you do need to be able to change active default `DateFormat` to use,
> you need to either create separate `ObjectMapper`s (inefficient but ok if
> you have just couple), or use ObjectReader/ObjectWriter. Latter allow
> thread-safe creation of differently configured instances and are designed
> for more flexible configuration.
>
> You can think of `ObjectMapper` as a factory for creating `ObjectReader`s
> and `ObjectWriter`s; with couple of convenience methods as short-cuts.
>
> I hope this helps,
>
> -+ Tatu +-
>
> (*) What happens with any attempted changes after this is undefined, but
> is likely one of (1) ignoring new settings, (2) using new settings, (3)
> failure in form of exception getting thrown.
>
>
>
>
> On Tue, Oct 11, 2016 at 3:37 AM, Mohan Radhakrishnan <
> radhakris...@gmail.com <javascript:>> wrote:
>
>> Hi,
>>
>>
>> I see this comment on setDateFormat
>>
>> If you need per-request configuration, use {@link #writer(DateFormat)} to
>> * create properly configured {@link ObjectWriter} and use that; this
>> because * {@link ObjectWriter}s are thread-safe whereas ObjectMapper itself
>> is only * thread-safe when configuring methods (such as this one) are NOT
>> called.
>> Does this mean that ObjectMapper itself cannot be thread-safe when we set
>> a date format ?
>> Does this mean that DateFormat isn't thread-safe ? DateFormat's aren't
>> thread-safe.
>> Thanks,
>> Mohan
>>
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