com.ibm.tspaces.examples.services
Class PrintText

java.lang.Object
  |
  +--com.ibm.tspaces.examples.services.TService
        |
        +--com.ibm.tspaces.examples.services.PrintText

public class PrintText

extends TService

implements Callback, java.lang.Runnable

PrintText accepts "PrintText"" requests from TupleSpace and issues a specified command to send the specified text to the printer The PrintText service is started by issuing the java invocation and specifying the PrinterName, PrintCommand and FileDirectory as parameters

     java com.ibm.tspaces.examples.services.PrintText 
     NOTE: When John started this, he used the following command:
           Printer1 "prfile32 /q " "c:\\tmp"
        but now that we want to make this a more general service, we
        just want to make this a general command, like this:
           Printer1 "print c:\\tmp"          
 
  A client that wants to use the services needs to only do the following

      TupleSpace servers = new TupleSpace("Services",servicehost);	    
	    
	    servers.write(TService.PRINT_TEXT, Printer1,"Line1 \n Line2");

The above is the simple PrintText command. The client can optionally add both fields to send Printer Options and an ID value that is used to get back a return value that will indicate if the request was sucessful. A client that wants to print the contents of a file needs to specify the File as a URL and pass it via the URLCopy facility

      TupleSpace servers = new TupleSpace("Services",servicehost);	       
	    servers.write(TServices.PRINT,Printer1,
              new URLCopy(filepath)),"opts",new Long(id));

where "filepath" points to a printable file. This could also be in the form "file:/filepath/filename" or "http://server/file"

Author:

John Thomas

See Also:

TupleSpace, Serialized Form

Fields inherited from class com.ibm.tspaces.examples.services.TService

APPLICATION, OTHER, PRINT_FILE, PRINT_TEXT, READMAIL, SENDMAIL

Constructor Summary

PrintText(java.lang.String name, java.lang.String cmd, java.lang.String filedir, java.lang.String filename)
PrintText Constructor

Method Summary

boolean	call(java.lang.String eventName, java.lang.String tsName, int seqNum, SuperTuple tuple, boolean isException) Implementation for the Callback interface.
static void	main(java.lang.String[] argv) Startup the PrintText Service Client.
void	print(java.lang.String text, java.lang.String opts, java.lang.Long ack) The print(msg) method will place the string data into a file and then issue the specified print command.
void	printfile(URLCopy clientCopy, java.lang.String opts, java.lang.Long ack) The printfile method will get the file data from the the url and place it in the directory and then issue the specified print command.
void	run() The run() method will wait for a print request Tuple to be Queued It will then take the request from TSpaces and then invoke the print method to Print the text that is included in the Tuple.

Methods inherited from class com.ibm.tspaces.examples.services.TService

enable, equals, getName, getQ, printQ, putQ, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PrintText

public PrintText(java.lang.String name,
                 java.lang.String cmd,
                 java.lang.String filedir,
                 java.lang.String filename)

PrintText Constructor

Method Detail

call

public boolean call(java.lang.String eventName,
                    java.lang.String tsName,
                    int seqNum,
                    SuperTuple tuple,
                    boolean isException)

Implementation for the Callback interface.

Specified by:

call in interface Callback

Parameters:

eventName_ - the name of the event command that caused this call, that is the name of the client side command of the thread that registered this call, e.g., in the case of a read, this would be TupleSpace.READ, **not** TupleSpace.WRITE which is the corresponding command that caused the actaul event.

tsName_ - the name of the tuple space this command was executed on.

sequenceNumber_ - the sequenceNumber for this event/command

tuple_ - the returned tuple or a Tuple with an exception inside

isException_ - was the command processed normaly or was there an exception

Returns:

true if this is the last call this sequence # should be getting otherwise false

run

public void run()

The run() method will wait for a print request Tuple to be Queued It will then take the request from TSpaces and then invoke the print method to Print the text that is included in the Tuple.

Specified by:

run in interface java.lang.Runnable

print

public void print(java.lang.String text,
                  java.lang.String opts,
                  java.lang.Long ack)

The print(msg) method will place the string data into a file and then issue the specified print command.

printfile

public void printfile(URLCopy clientCopy,
                      java.lang.String opts,
                      java.lang.Long ack)

The printfile method will get the file data from the the url and place it in the directory and then issue the specified print command.

main

public static void main(java.lang.String[] argv)

Startup the PrintText Service Client. Syntax: java ...PrintText name "cmd to issue" filedir name = Name to be used to contact server cmd = Print command to use. File name will be appended filedir = Directory where file will be built during print.