I know but sometimes I need this kind of modifiable message. For example 
when the purpose of my actor is to compete the "missing pieces of 
something" ( I think I saw such designs in akka books or was it the Rolands 
coursera  webcrawler example)
May I ask why it is assured to work? Does  the akka dispatcher call a  
synchronize monitor behind the scenes to ensure field visibility?

Am Dienstag, 6. Oktober 2015 10:11:54 UTC+2 schrieb √:
>
> Hi John,
>
> yes it will work, but keep in mind that it is *highly* discouraged to send 
> mutable messages not only because it won't work across JVMs but also 
> because nothing prevents you for accidental aliasing it.
>
> On Tue, Oct 6, 2015 at 9:46 AM, <[email protected] <javascript:>> wrote:
>
>> Hi,
>> please see the code at http://pastebin.com/L0WiXTJU
>>
>> Does Akka garantee that changes to the ArrayList "theList" will always 
>> been seen by ExampleActor? <http://pastebin.com/L0WiXTJU>
>>
>> Or asked differently does the rule from 
>> http://doc.akka.io/docs/akka/2.4.0/general/jmm.html 
>>
>> *"The actor send rule:* the send of the message to an actor happens 
>>> before the receive of that message by the same actor" 
>>
>>  
>> ensure that my ExampleActor logic works?
>> <http://pastebin.com/L0WiXTJU>
>>  
>>
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>
>
>
> -- 
> Cheers,
> √
>

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