Package com.wolfram.jlink
Class PacketPrinter
java.lang.Object
com.wolfram.jlink.PacketPrinter
- All Implemented Interfaces:
PacketListener
,java.util.EventListener
public class PacketPrinter extends java.lang.Object implements PacketListener
PacketPrinter is an implementation of the PacketListener interface that prints
the contents of incoming packets to a stream that you specify.
PacketPrinter is useful for debugging, when you want to see exactly what Mathematica is sending you. Here is how you might use it:
// ml is a KernelLink PacketListener stdoutPrinter = new PacketPrinter(System.out); ml.addPacketListener(stdoutPrinter);After the execution of the above code, the contents of all packets that arrive during calls to the KernelLink methods waitForAnswer(), discardAnswer(), or any of the "evaluateTo" set will be printed to System.out. No matter how many PacketListeners are registered, their monitoring of incoming packets will never interfere with any other packet-handling code in your program, so you can turn on and off this full packet tracing by just adding or removing the two lines above. No other changes whatsoever are required to your program.
- See Also:
PacketListener
,PacketArrivedEvent
,KernelLink
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Constructor Summary
Constructors Constructor Description PacketPrinter()
Prints packets to System.out.PacketPrinter(java.io.PrintStream strm)
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Method Summary
Modifier and Type Method Description boolean
packetArrived(PacketArrivedEvent evt)
Invoked when a packet arrives on the link.
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Constructor Details
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PacketPrinter
public PacketPrinter()Prints packets to System.out. -
PacketPrinter
public PacketPrinter(java.io.PrintStream strm)- Parameters:
strm
- the stream on which packets will be printed
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Method Details
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packetArrived
Invoked when a packet arrives on the link.- Specified by:
packetArrived
in interfacePacketListener
- Parameters:
evt
- the PacketArrivedEvent- Returns:
- true
- Throws:
MathLinkException
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