On Sat, Dec 10, 2011 at 2:39 AM, John McIntosh <
[email protected]> wrote:
> Mmm I recall a problem from long ago where the buffer passed into the
> zip call was not big enough to store the results.
> If you pass in a small chunk of data, why the buffer to hold the
> results and the decode data is bigger than the buffer going in.
> So the two sizes, input and output are?
>
Hi John. For writing we are using a particular buffered write stream which
then delegates to the orignal stream. So at the end we should be doing the
equivalent of:
GZipWriteStream on: (ByteArray new writeStream). That's the default for
testing, then you could also do GZipWriteStream on a StandardStream...
Anyway, our write buffer has this method:
FLBufferedWriteStream >> flushBuffer
position = 0 ifTrue: [ ^ self ].
position = buffer size
ifTrue: [
stream nextPutAll: buffer ]
ifFalse: [
streamRespondsToNextPutAllStartingAt
ifTrue: [ stream next: position putAll: buffer startingAt:
1 ]
ifFalse: [ stream nextPutAll: (buffer copyFrom: 1 to:
position) ] ].
position := 0
>From what I can see in the stack, it is crasing here when it sends "stream
next: position putAll: buffer startingAt: 1"
I put some flags here and 'buffer' size is 4096 (we choose that value) and
the position was for example 325.
Is this what you asked or did I misunderstand ?
Thanks in advance!
>
>
> On Fri, Dec 2, 2011 at 4:41 PM, Mariano Martinez Peck
> <[email protected]> wrote:
> > Hi guys. We are doing some experiments with Fuel and GZip streams... Now
> I
> > have a beatiful test like this:
> >
> > testMethodContextThisContext
> >
> > | materializedContext context |
> > context := thisContext copy.
> > materializedContext := self resultOfSerializeAndMaterialize: context.
> >
> > and it crashes like crazy. From the VM crash stack, I can see:
> >
> >
> > Smalltalk stack dump:
> > 0xbff66ba4 M GZipWriteStream(DeflateStream)>deflateBlock 447551436: a(n)
> > GZipWriteStream
> > 0xbff66bc8 M GZipWriteStream(DeflateStream)>nextPutAll: 447551436: a(n)
> > GZipWriteStream
> > 0xbff66be4 M GZipWriteStream(DeflateStream)>next:putAll:startingAt:
> > 447551436: a(n) GZipWriteStream
> > 0xbff66c08 M FLBufferedWriteStream>flushBuffer 448048664: a(n)
> > FLBufferedWriteStream
> > 0xbff66c20 M FLBufferedWriteStream>nextBytesPutAll: 448048664: a(n)
> > FLBufferedWriteStream
> > 0xbff66c40 M FLBufferedWriteStream>nextStringPut: 448048664: a(n)
> > FLBufferedWriteStream
> > 0xbff66c5c M FLByteStringCluster>serialize:on: 448054196: a(n)
> > FLByteStringCluster
> > 0xbff66c7c M
> FLByteStringCluster(FLPrimitiveCluster)>serializeInstance:with:
> > 448054196: a(n) FLByteStringCluster
> > 0xbff66ca0 M [] in
> > FLByteStringCluster(FLIteratingCluster)>serializeInstances: 448054196:
> a(n)
> > FLByteStringCluster
> > 0xbff66cc8 M IdentitySet(Set)>do: 451711680: a(n) IdentitySet
> > 0xbff66ce4 M FLByteStringCluster(FLIteratingCluster)>serializeInstances:
> > 448054196: a(n) FLByteStringCluster
> > 0xbff66d00 M
> > FLByteStringCluster(FLIteratingCluster)>serializeInstancesStepWith:
> > 448054196: a(n) FLByteStringCluster
> > 0xbff66d1c M FLSerialization>clusterInstancesStepOf: 448053428: a(n)
> > FLSerialization
> > 0xbff66d38 M [] in FLSerialization>instancesStep 448053428: a(n)
> > FLSerialization
> > 0xbff66d58 M OrderedCollection>do: 449989736: a(n) OrderedCollection
> > 0xbff66d74 M FLSerialization>instancesStep 448053428: a(n)
> FLSerialization
> > 0xbff66d8c M FLSerialization>run 448053428: a(n) FLSerialization
> > 0xbff66db0 I [] in FLSerializer>defaultSerialization 447550464: a(n)
> > FLSerializer
> > 0xbff66dd8 M [] in FLSerializer>serialize:on: 447550464: a(n)
> FLSerializer
> > 0xbff66df8 M BlockClosure>ensure: 448052884: a(n) BlockClosure
> > 0xbff66e18 M FLSerializer>serialize:on: 447550464: a(n) FLSerializer
> > 0xbff66e3c M [] in
> > FLMethodContextSerializationTest(FLSerializationTest)>serialize:
> 447235380:
> > a(n) FLMethodContextSerializationTest
> > 0xbff66e60 M [] in GZipWriteStream class(PositionableStream class)>on:do:
> > 419845144: a(n) GZipWriteStream class
> > 0xbff66e80 M BlockClosure>ensure: 448048616: a(n) BlockClosure
> > 0xbff66ea0 M GZipWriteStream class(PositionableStream class)>on:do:
> > 419845144: a(n) GZipWriteStream class
> > 0xbff66ec4 M [] in FLGZipStrategy>writeStreamDo: 447550896: a(n)
> > FLGZipStrategy
> > 0xbff66ee0 M FLByteArrayStreamStrategy>writeStreamDo: 447550884: a(n)
> > FLByteArrayStreamStrategy
> > 0xbff66efc M FLGZipStrategy>writeStreamDo: 447550896: a(n) FLGZipStrategy
> > 0xbff66f18 M
> > FLMethodContextSerializationTest(FLSerializationTest)>serialize:
> 447235380:
> > a(n) FLMethodContextSerializationTest
> > 0xbff66f34 M
> >
> FLMethodContextSerializationTest(FLSerializationTest)>resultOfSerializeAndMaterialize:
> > 447235380: a(n) FLMethodContextSerializationTest
> > 0xbff66f58 M
> FLMethodContextSerializationTest>testMethodContextThisContext
> > 447235380: a(n) FLMethodContextSerializationTest
> >
> >
> > any idea of where I should start to look at?
> >
> > Thanks
> >
> >
> > --
> > Mariano
> > http://marianopeck.wordpress.com
> >
>
>
>
> --
> ===========================================================================
> John M. McIntosh <[email protected]>
> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
> ===========================================================================
>
>
--
Mariano
http://marianopeck.wordpress.com
