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"{ Package: 'stx:libbasic2' }"
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"{ NameSpace: Smalltalk }"
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Stream subclass:#LoggingStream
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instanceVariableNames:'loggedStream logger'
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classVariableNames:''
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poolDictionaries:''
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category:'Streams-Misc'
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!
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!LoggingStream class methodsFor:'documentation'!
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documentation
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"
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Useful for debugging - stream operations are logged in human readable form
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on a separate logger stream, while stream operations are forwarded to the underlying
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loggedStream.
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Unfinished - may need more protocol to be intercepted.
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sample use, logging operations on a socket stream:
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sock := ... Socket connectTo: ...
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s := LoggingStream new loggedStream: sock.
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...
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use s instead of sock
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...
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[author:]
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cg
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[instance variables:]
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[class variables:]
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[see also:]
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"
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! !
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!LoggingStream class methodsFor:'instance creation'!
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on:aStream
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"Create & return a new instance for aStream, logging to the Transcript."
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^ self on:aStream logger:Transcript
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!
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on:aStream logger:aLoggerStream
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"Create & return a new instance for aStream, logging to aLoggerStream."
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^ self basicNew initializeOn:aStream logger:aLoggerStream
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! !
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!LoggingStream methodsFor:'accessing'!
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loggedStream
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^ loggedStream
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!
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loggedStream:something
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loggedStream := something.
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!
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logger
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^ logger
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!
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logger:something
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logger := something.
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! !
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!LoggingStream methodsFor:'initialization'!
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initializeOn:aStream logger:aLogger
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loggedStream := aStream.
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logger := aLogger.
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! !
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!LoggingStream methodsFor:'logging'!
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log:messageString
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logger nextPutLine:messageString.
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! !
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!LoggingStream methodsFor:'reading'!
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next
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|el|
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el := loggedStream next.
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self log:( '<<< ' , el storeString ).
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^ el
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! !
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!LoggingStream methodsFor:'stream protocol'!
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atEnd
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^ loggedStream atEnd.
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!
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flush
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loggedStream flush.
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!
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next:n
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|els|
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els := loggedStream next:n.
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self log:( '<<< ' , els storeString ).
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^ els
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!
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nextBytes:n
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|els|
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els := loggedStream nextBytes:n.
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self log:( '<<< ' , els storeString ).
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^ els
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!
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nextPut:something
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self log:( '>>> ' , something storeString).
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loggedStream nextPut:something.
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^ something
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!
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nextPutAll:aCollection
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self log:( '>>> ' , aCollection storeString).
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loggedStream nextPutAll:aCollection.
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!
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peek
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^ loggedStream peek
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!
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peekOrNil
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^ loggedStream peekOrNil
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!
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readWait
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^ loggedStream readWait.
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!
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skipSeparators
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|ch|
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[
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(ch := loggedStream peekOrNil) notNil
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and:[ch isSeparator]
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] whileTrue:[
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self next.
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].
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^ ch
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!
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upToEnd
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|els|
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els := loggedStream upToEnd.
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self log:( '<<< ' , els storeString).
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^ els
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! !
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!LoggingStream class methodsFor:'documentation'!
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version
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^ '$Header$'
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!
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version_CVS
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^ '$Header$'
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! !
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