Flow

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14 discussions

Flow tutorial...
by Charles Turner 28 Jun '07

28 Jun '07

Hi- Working through the Flow tutorial from 1998 and had a question. Should I be able to say the following? Smalltalk at: #Examplestream put: nil Examplestream := (String new: 16) writableStream Examplestream nextPut: $H Examplestream nextPutAll: 'ello World!' For me this gives an "Error: Subscript Out of Bounds: 1" after the final line of code. I'm running alpha12 naiad with Squeak 3.9-final-7067 image. I filed in the "naiad.st" file. (FWIW: writableStream is spelled writeableStream in the tutorial) Thanks, Charles Turner <vze26m98(a)optonline.net>

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Craig ported Flow to Squeak 3.9
by Craig Latta 03 May '07

03 May '07

Hi-- After I announced to the Squeak and Spoon lists a few weeks ago that I had ported Flow to Squeak 3.9 as part of my Spoon work, many people have asked whether I have ported Flow to Squeak 3.9. :) Well, here goes one more time: I have ported Flow to Squeak 3.9. I did this so that one may speak to a Spoon system from a Squeak 3.9 system, and simulate the Spoon VM (including network support) from a Squeak 3.9 simulator. http://netjam.org/spoon/releases/current thanks! -C -- Craig Latta improvisational musical informaticist www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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Flow port
by Brenda 03 Apr '07

03 Apr '07

I have been really busy at work & had no time to work on porting Flow. I put everything I have at http://www.hhhh.org/~asparagi/Flow/; please feel free to move forward with it. Something similar to this loaded into 3.2 at one point, and it may work to at least some extent, but it needs unit tests before anyone will be able to tell whether it works for sure. Obviously the further one gets from 3.2 the less likely it will work. I think you need to file in Flow3aDependencies first, then Flow3a. Good luck, and sorry I didn't just post this incrementally as I worked. :( Brenda

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Flow 3a release progress update
by Brenda 16 Jul '06

16 Jul '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Below is the class hierarchy diagram for Flow 3a. There is no particular reason to expect it to change before release. If you are having line wrap issues, it will probably look better pasted into a Workspace. Testing to confirm none of my refactorings broke anything is under way. The next step will be to file out in such a way that it can be filed into a 3.2 stock image. The tricky part will be identifying Flow's dependencies on changes in non-Flow classes. I plan to make filing in work for all target stock images (Squeak 3.2, 3.6, 3.7, 3.8 and 3.9) before releasing any of the changesets, in hopes that the code named Flow 3a can be & work as similarly as possible in all the target images. Brenda - -- ProtoObject Object Collection SequenceableCollection OrderedCollection FlowPathSegmentCollection TestCase FlowTestURI InterpreterPlugin Flow Exception Error FlowStreamingError FlowExhaustion FlowExternalResourceError FlowConnectionRefused FlowEncodingMismatch FlowFailedReadingAttempt FlowFailedWritingAttempt FlowFilesystemError FlowFileNotFound FlowInvalidPositioningAttempt FlowInvalidReadingAttempt FlowInvalidWritingAttempt FlowTimeout FlowUnresolvableHostname FlowOverflow FlowIllegalURI FlowCorrespondent FlowClient FlowIncomingClient FlowIncomingHTTPClient FlowOutgoingClient FlowOutgoingHTTPClient FlowOutgoingPOPClient FlowServer FlowHTTPServer FlowTransport FlowSerialTransport FlowIP4Transport FlowStream FlowPositionableStream FlowWritableStream FlowDiscardingStream FlowExternalStream FlowFileStream FlowAppendingFileStream FlowAppendingFileStreamWriter FlowRemoteFileStream FlowNetStream FlowHardwareStream FlowAudioStream FlowIEEE1394Stream FlowParallelPortStream FlowSerialPortStream FlowIP4Stream FlowTCPStream FlowUDPStream FlowNetMessage FlowHTTPMessage FlowHTTPRequest FlowHTTPResponse FlowNewsMessage FlowURIStream FlowExternalResource FlowFile FlowNetResource FlowHardwarePort FlowAudioPort FlowIEEE1394Port FlowInfraredPort FlowParallelPort FlowSerialPort FlowUSBPort FlowIP4Socket FlowTCPSocket FlowClientTCPSocket FlowIncomingClientTCPSocket FlowOutgoingClientTCPSocket FlowServerTCPSocket FlowUDPSocket FlowIP4AddressResolver FlowSpeechRelay FlowHostPlatform FlowMacintosh FlowRiscOS FlowUnix FlowWin32 FlowURI FlowHierarchicalURI FlowOpaqueURI FlowAuthority FlowRegisteredAuthority FlowPeerAccessAuthority FlowIP4Address -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEurZULgS0DKtN84oRAkOjAKC8dMkiw0AkyN8sy+bmoMW+lOOzxQCgoR6I 6u3a+gRJS5SPziL72CnQhM4= =H/Nb -----END PGP SIGNATURE-----

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Flow 3a release progress update
by Brenda 12 Jul '06

12 Jul '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 As I think a few of you know, I am putting together a new release of Flow based on Craig's current code. Craig is still Flow's owner; I am mostly providing release management assistance. Craig did some significant refactoring (go, Craig!) since Flow 2a, so we will be calling this Flow 3a. It is planned to work on Squeak 3.2, 3.6, 3.7, 3.8 and 3.9. All class names will begin with Flow, to eliminate naming conflicts with the stock networking library. One of the many reasons you want it (truly, madly, deeply) is that it is a prerequisite for Squeak images exchanging messages with Spoon images. I don't know when the new package will be available, but I will send status updates here (the Flow and IO mailing lists) after I make more progress. Current status is that I have Craig's latest Squeak bits. I found all the classes that will go into the Flow 3a release, and put them in appropriate categories. They are mostly renamed to their new names. I will send a class hierarchy diagram with the new names shortly after I finish renaming. In addition, I am combining parts of my URI implementation (which will be included in Flow 3a in lieu of the *Locator classes) with Craig's SocketAddress class. These things are the only refactoring I am planning to do before release -- the intention is to release as quickly as possible. After the steps in the above paragraph are done, Craig & I will both do some testing to confirm I didn't break anything. It is possible that the easiest way to do this will be to write a test suite, but I'm not making any commitments on this point yet. Plenty to do left after that.. Brenda -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEtJrrLgS0DKtN84oRAmf2AJ9FS+zcOHzXoxIVtxkgY3VIrEV0eACgnOZ6 DO5F1txdTD9x+VHhehcDqp0= =Vb48 -----END PGP SIGNATURE-----

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change to Flow release schedule
by Craig Latta 12 Feb '03

12 Feb '03

Hi there-- As part of some other music projects I'm doing, I've added MIDI support to Flow. This was originally going to be a version 3 feature, but now I plan to make it part of the next version 2 release. I've also fixed the NetStream buffering bug that Stephen Rudlof reported a while ago, and written regression tests for the ExternalResource hierarchy (which use and exercise the Correspondent hierarchy). Those tests work, and I'm happy with the MIDI stuff, so I think the next release should be 2 gamma. I plan to make it available on Friday, 7 March 2003. It'll be at the Flow website (http://netjam.org.flow). thanks, -C -- Craig Latta improvisational musical informaticist craig(a)netjam.org www.netjam.org/resume Smalltalkers do: [:it | All with: Class, (And love: it)]

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[FIX] FlowFix-sr
by Stephan Rudlof 02 Sep '02

02 Sep '02

"Change Set: FlowFix-sr Date: 2 September 2002 Author: Stephan Rudlof I have problems with the last Flow distribution: http://netjam.org/smalltalk/sources/flow/flow2a.zip : something seems broken, already Socket performExamples doesn't work. With this changeset at least TCPSocket echoBytes *does* work! And it suggests that the problems are really at the ST side (has taken some time to configure my Linux machine correctly for socket access (for Nebraska)...)." Remarks: I'm currently working at a client/server application. It should work with quite asynchronous characteristics: the server gets commands and it's unknown, if it responds in 100ms or 30 minutes... I've taken a look into what is there in Squeak now: as a consequence I'd like to use a better approach, what Flow seems to promise. But it has to work at first... If I'd decide to use it, there is a good chance to get some demo example for Flow back ;-) Greetings, Stephan -- Stephan Rudlof (sr(a)evolgo.de) "Genius doesn't work on an assembly line basis. You can't simply say, 'Today I will be brilliant.'" -- Kirk, "The Ultimate Computer", stardate 4731.3 'From Squeak3.2 of 11 July 2002 [latest update: #4956] on 2 September 2002 at 8:29:20 pm'! "Change Set: FlowFix-sr Date: 2 September 2002 Author: Stephan Rudlof I have problems with the last Flow distribution: http://netjam.org/smalltalk/sources/flow/flow2a.zip : something seems broken, already Socket performExamples doesn't work. With this changeset at least TCPSocket echoBytes *does* work!! And it suggests that the problems are really at the ST side (has taken some time to configure my Linux machine correctly for socket access (for Nebraska)...)."! !ExternalStream class methodsFor: 'instance creation' stamp: 'sr 9/2/2002 20:11'! on: anExternalResource "Answer an instance of myself on anExternalResource." ^self basicNew resource: anExternalResource; collection: ByteArray new; yourself! ! !Socket class methodsFor: 'examples' stamp: 'sr 9/2/2002 20:18'! echoBytesOn: aNetStream "Echo some bytes on aNetStream, which is connected to a remote host." ^[ | outgoingBytes | outgoingBytes _ 'fribbly\' withCRs. aNetStream nextPutAll: outgoingBytes. (aNetStream next: outgoingBytes size) asString = outgoingBytes ] ensure: [aNetStream close]! !

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Re: [BUG][Flow2a1] re: broken (was "Flow 2 alpha 1 released")
by Stephan Rudlof 28 Aug '02

28 Aug '02

Craig, thanks for your answer. Craig Latta wrote: > Hi Stephan-- > > >>...FileServer>>initialize... > > > Oops; FileServer's definition says it wants to use a pool dictionary > called "FileServerCommands", but that should be > "RemoteFileStreamCommands" (as defined by FileClient). So they go to Undeclared: Undeclared keys a Set(#utterFailure #failure #mustBePresent #close #ok #DebuggingLog #position #noClobber #Timestamp #clientStreams #commit #open #wait #HTTPClient #isWriteable #clobber #CR #TFTPCorrespondent #temporaryFailure #HTMLParser #tellMeMore #RandomNumberStream #Expression #binaryness #write #read #CrLf #TimeStamp) > > I don't have time at the moment I know this problem ;-) > to investigate the restart problem you > mentioned, This is not my primary problem, ... > but I expect I will next week. (And it looks like you solved > your >>echoBytes problem via tweaking your platform environment.) ...but this: Socket performExamples definitely doesn't work for me. It fails in TCPSocket class(Socket class)>>echoBytesOn: (as shown in the debugLog in the mail with the debugLog ;-) ). I think a part of the error is at the ST side (at least error handling). > > As for >>userAgentString being undefined in > >>>httpGetDocument:args:accept:request: and friends in (HttpSocket class), it looks like the 3.3a patch "4776xTPfixes-hg" slipped into my integration by mistake. The point of my changes to those methods was to use 'self initializeNetwork' instead of 'Socket initializeNetwork' (to free up the "Socket" class name :). The simplest thing to do at the moment is probably to just add >>userAgentString; I've included it below for convenience. >> This patch works. > > Further discussion should probably happen over at the Flow list; please > join if you'd like to converse there. I'll limit further discussion to there for the time beeing. Greetings, Stephan > > > thanks! > > -C > > *** > > !HTTPSocket class methodsFor: 'utilities' stamp: 'hg 2/11/2002 11:31'! > userAgentString > "self userAgentString" > > ^'User-Agent: ', > SystemVersion current version, '-', > SystemVersion current highestUpdate printString! ! > > *** > > -- > Craig Latta > improvisational musical informaticist > craig(a)netjam.org > www.netjam.org/resume > Smalltalkers do: [:it | All with: Class, (And love: it)] > > -- Stephan Rudlof (sr(a)evolgo.de) "Genius doesn't work on an assembly line basis. You can't simply say, 'Today I will be brilliant.'" -- Kirk, "The Ultimate Computer", stardate 4731.3

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Flow 2 alpha 1 released
by Craig Latta 13 Aug '02

13 Aug '02

Hi-- Alrighty then... I just released Flow 2 alpha 1, a streaming framework for Squeak. It provides a handy interface for manipulating external resources of various stripes, and for writing services that use them (e.g., "clients and servers"). Please see http://netjam.org/flow for details. This release features: - greatly simplified installation Download a ZIP file and file-in the sole file within. After installation you're ready to go; you don't need to build a new VM or even restart your running Squeak. I've only tested this with the Squeak 3.2 final snapshot. For the next release, I'll test with subsequent updates loaded. - socket support (not new but worth mentioning :) - filesystem support - partial serial and parallel port support - the basic framework for other planned transports (MIDI, digital audio, IEEE 1394 ["FireWire"], IR) I've tested on GNU/Linux, Windows 98SE, and WinCE. If you'd like to help test on other platforms, please let me know! MacOS X should be particularly straightforward, since it's allegedly FreeBSD underneath (I don't have access to a Mac). There's a Flow mailing list; details are at the website. thanks! -C p.s. As I recall, there used to be a "Squeak announcements" list. It doesn't seem to be around anymore. Is it? -- Craig Latta improvisational musical informaticist craig(a)netjam.org www.netjam.org/resume Smalltalkers do: [:it | All with: Class, (And love: it)]

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one step backward, two steps forward :)
by Craig Latta 11 Aug '02

11 Aug '02

Hi-- Okay, I've finished the testing I can do for Flow 2a... I got positive results for: - Linux 2.4.17, i686 - Windows 98SE - WinCE 3.0.9348.9616 I got negative results for OpenBSD 2.8 and 3.1. I think there's a bug in libc_r and/or the kernel that deadlocks when a child thread make a blocking call to select(). There's a test server running on netjam.org:9007 (a Linux machine). Visit it for a Zen moment. :) I need volunteers to test on other platforms; please let me know if you'd like to help. I'm putting the finishing touches on the release bits. thanks! -C -- Craig Latta improvisational musical informaticist craig(a)netjam.org www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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