[rabbitmq-discuss] How to check if custom headers attribute exist

[cw storm]

Can I do a check something like below?

if (headers.getHeaders().get("FirstName") != null))


On Thu, Jan 30, 2014 at 12:35 PM, cw storm <cwstorm at gmail.com> wrote:

> Actually, I need to check if "FirstName" is null or not in order to use
> toString().
>
>
> On Thu, Jan 30, 2014 at 12:26 PM, cw storm <cwstorm at gmail.com> wrote:
>
>> Does this look right?
>>
>> Map<String,object> headers = properties.getHeaders();
>>
>> if (headers.containsKey("FirstName")) {
>>         String strFirstName = props.getHeaders().get("
>> FirstName").toString();
>>  }
>>
>>
>>
>> On Thu, Jan 30, 2014 at 12:18 PM, cw storm <cwstorm at gmail.com> wrote:
>>
>>> Thanks Tim.  How do code to see if the key is there or not?
>>>
>>>
>>> On Thu, Jan 30, 2014 at 11:58 AM, Tim Watson <tim at rabbitmq.com> wrote:
>>>
>>>> BasicProperties#getHeaders() returns a Map, so Map#get(key) will return
>>>> `null' if the key isn't present. It's your #toString() on `null' that is
>>>> likely causing the problem. You could also call
>>>> Map#containsKey("FirstName") instead of checking for `null' if you prefer.
>>>>
>>>> Cheers,
>>>> Tim
>>>>
>>>> On 30 Jan 2014, at 16:30, cw storm wrote:
>>>>
>>>> > Please forgive me but I have a simple question.  How can I check to
>>>> see if there's custom header attribute exist or not before I perform the
>>>> below:
>>>> >
>>>> > String strFirstName = props.getHeaders().get("FirstName").toString()
>>>> >
>>>> > I believe if there's no custom headers, then it'll exception.
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>>>
>>>
>>
>
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