com.zebra.sdk.remote.comm

Class MultichannelRemoteConnection

Object

com.zebra.sdk.comm.MultichannelConnection

com.zebra.sdk.remote.comm.MultichannelRemoteConnection

All Implemented Interfaces:

Connection, ConnectionWithWriteLogging

public class MultichannelRemoteConnection
extends MultichannelConnection

Establishes a Multichannel Remote connection to a device

package test.zebra.sdk.comm.examples;
 
 import com.zebra.sdk.comm.Connection;
 import com.zebra.sdk.comm.ConnectionException;
 import com.zebra.sdk.printer.PrinterStatus;
 import com.zebra.sdk.printer.ZebraPrinterFactory;
 import com.zebra.sdk.printer.ZebraPrinterLinkOs;
 import com.zebra.sdk.remote.comm.MultichannelRemoteConnection;
 
 public class MultichannelRemoteConnectionExample {
 
     // This example assumes Link-OS printers are connected via Web Sockets to a server which is running a Zebra servlet
     // instance.
     public static void main(String[] args) throws Exception {
         new MultichannelRemoteConnectionExample().simpleExample("myPrinterUUID");
         new MultichannelRemoteConnectionExample().nonBlockingStatusReporting("myPrinterUUID");
     }
 
     private void simpleExample(String theUniqueId) throws ConnectionException {
         // Instantiate Multichannel Remote connection for simultaneous printing and status reporting with a given
         // unique ID, using the default Zebra Web services port (11995).
         // Note: The printer must be connected to a server which is running a Zebra servlet instance.
         Connection thePrinterConn = new MultichannelRemoteConnection(theUniqueId);
 
         try {
             // Opens the connection - physical connection is established here.
             thePrinterConn.open();
 
             // Creates a Link-OS printing with the given connection
             ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.getLinkOsPrinter(thePrinterConn);
 
             // This is sent over the printing channel
             linkOsPrinter.printConfigurationLabel();
 
             // This is sent over the status channel
             PrinterStatus status = linkOsPrinter.getCurrentStatus();
 
             System.out.println("The printer PAUSED state is : " + status.isPaused);
         } catch (ConnectionException e) {
             // Handle communications error here.
             e.printStackTrace();
         } finally {
             // Close the connection to release resources.
             thePrinterConn.close();
         }
     }
 
     private void nonBlockingStatusReporting(String theUniqueId) throws ConnectionException {
         // Instantiate Multichannel Remote connection for simultaneous printing and status reporting with a given
         // unique ID, using the default Zebra Web services port (11995).
         // Note: The printer must be connected to a server which is running a Zebra servlet instance.
         Connection thePrinterConn = new MultichannelRemoteConnection(theUniqueId);
 
         try {
             // Opens the connection - physical connection is established here.
             thePrinterConn.open();
 
             // Creates a Link-OS printing with the given connection
             ZebraPrinterLinkOs linkOsPrinter = ZebraPrinterFactory.getLinkOsPrinter(thePrinterConn);
 
             // This is sent over the printing channel and will block the printing channel until the
             // label format is completely sent.
             String labelFormatStartCommand = "^XA";
             linkOsPrinter.sendCommand(labelFormatStartCommand);
 
             String labelBody = "^FO20,20^A0N,25,25^FDThis is a ZPL test.^FS";
             linkOsPrinter.sendCommand(labelBody);
 
             // This is sent over the status channel and will return immediately even though the
             // printing channel is in use.
             // If a RemoteConnection were used instead of a MultichannelRemoteConnection, this would not be possible.
             PrinterStatus status = linkOsPrinter.getCurrentStatus();
 
             System.out.println("The printer PAUSED state is : " + status.isPaused);
 
             // Send the end of label command to finish and print the label.
             String labelFormatEndCommand = "^XZ";
             linkOsPrinter.sendCommand(labelFormatEndCommand);
         } catch (ConnectionException e) {
             // Handle communications error here.
             e.printStackTrace();
         } finally {
             // Close the connection to release resources.
             thePrinterConn.close();
         }
     }
 }
 

Constructor Summary

Constructors

Constructor and Description
MultichannelRemoteConnection(String uniqueId) Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995). This constructor will use the default timeouts for Connection.read().
MultichannelRemoteConnection(String uniqueId, int rmiServerPort) Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort. This constructor will use the default timeouts for Connection.read().
MultichannelRemoteConnection(String uniqueId, int maxTimeoutForRead, int timeToWaitForMoreData) Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995). This constructor will use the specified timeouts for Connection.read() for both channels.
MultichannelRemoteConnection(String uniqueId, int rmiServerPort, int maxTimeoutForRead, int timeToWaitForMoreData) Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort. This constructor will use the specified timeouts for Connection.read() for both channels.
MultichannelRemoteConnection(String uniqueId, int printingChannelMaxTimeoutForRead, int printingChannelTimeToWaitForMoreData, int statusChannelMaxTimeoutForRead, int statusChannelTimeToWaitForMoreData) Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995). This constructor will use the specified timeouts for Connection.read() for the channels.
MultichannelRemoteConnection(String uniqueId, int rmiServerPort, int printingChannelMaxTimeoutForRead, int printingChannelTimeToWaitForMoreData, int statusChannelMaxTimeoutForRead, int statusChannelTimeToWaitForMoreData) Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort. This constructor will use the specified timeouts for Connection.read() for the channels.

Method Summary

Methods

Modifier and Type	Method and Description
ConnectionReestablisher	getConnectionReestablisher(long thresholdTime) Returns a ConnectionReestablisher which allows for easy recreation of a connection which may have been closed.
String	getSimpleConnectionName() Return the remote connection unique id of the printer port as the description.
String	toString() Returns REMOTE_MULTI:[uniqueId]:[rmiServerPort]. The uniqueId and rmiServerPort are the parameters which were passed into the constructor.

Methods inherited from class com.zebra.sdk.comm.MultichannelConnection

addWriteLogStream, bytesAvailable, close, closePrintingChannel, closeStatusChannel, getMaxTimeoutForRead, getPrintingChannel, getStatusChannel, getTimeToWaitForMoreData, isConnected, open, openPrintingChannel, openStatusChannel, read, read, readChar, sendAndWaitForResponse, sendAndWaitForResponse, sendAndWaitForValidResponse, sendAndWaitForValidResponse, setMaxTimeoutForRead, setTimeToWaitForMoreData, waitForData, write, write, write

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId)

Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995).
This constructor will use the default timeouts for Connection.read(). The default timeout is a maximum of 1 seconds for any data to be received. If no more data is available after 1 second the read operation is assumed to be complete.
To specify timeouts other than the defaults, use:
MultichannelRemoteConnection(String, int, int, int)

Parameters:

uniqueId - the UUID of the device.

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId,
                            int rmiServerPort)

Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort.
This constructor will use the default timeouts for Connection.read(). The default timeout is a maximum of 1 seconds for any data to be received. If no more data is available after 1 second the read operation is assumed to be complete.
To specify timeouts other than the defaults, use:
MultichannelRemoteConnection(String, int, int, int)

Parameters:

uniqueId - the UUID of the device.

rmiServerPort - the port the RMI server is running on.

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId,
                            int maxTimeoutForRead,
                            int timeToWaitForMoreData)

Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995).
This constructor will use the specified timeouts for Connection.read() for both channels. The timeout is a maximum of maxTimeoutForRead milliseconds for any data to be received. If no more data is available after timeToWaitForMoreData milliseconds the read operation is assumed to be complete. If you wish to specify different timeouts for each channel, use MultichannelRemoteConnection(String, int, int, int, int, int).

Parameters:

uniqueId - the UUID of the device.

maxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received.

timeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read.

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId,
                            int rmiServerPort,
                            int maxTimeoutForRead,
                            int timeToWaitForMoreData)

Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort.
This constructor will use the specified timeouts for Connection.read() for both channels. The timeout is a maximum of maxTimeoutForRead milliseconds for any data to be received. If no more data is available after timeToWaitForMoreData milliseconds the read operation is assumed to be complete. If you wish to specify different timeouts for each channel, use MultichannelRemoteConnection(String, int, int, int, int, int).

Parameters:

uniqueId - the UUID of the device.

rmiServerPort - the port the RMI server is running on.

maxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received.

timeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read.

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId,
                            int printingChannelMaxTimeoutForRead,
                            int printingChannelTimeToWaitForMoreData,
                            int statusChannelMaxTimeoutForRead,
                            int statusChannelTimeToWaitForMoreData)

Initializes a new instance of the MultichannelRemoteConnection class using the default Zebra Web services port (11995).
This constructor will use the specified timeouts for Connection.read() for the channels. The timeout is a maximum of printingChannelMaxTimeoutForRead/statusChannelMaxTimeoutForRead milliseconds for any data to be received on the printing/status channels respectively. If no more data is available after printingChannelTimeToWaitForMoreData/statusChannelTimeToWaitForMoreData milliseconds on the printing/status channels respectively the read operation is assumed to be complete.

Parameters:

uniqueId - the UUID of the device.

printingChannelMaxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received on the printing channel.

printingChannelTimeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read on the printing channel.

statusChannelMaxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received on the status channel.

statusChannelTimeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read on the status channel.

MultichannelRemoteConnection

public MultichannelRemoteConnection(String uniqueId,
                            int rmiServerPort,
                            int printingChannelMaxTimeoutForRead,
                            int printingChannelTimeToWaitForMoreData,
                            int statusChannelMaxTimeoutForRead,
                            int statusChannelTimeToWaitForMoreData)

Initializes a new instance of the MultichannelRemoteConnection class using the specified rmiServerPort.
This constructor will use the specified timeouts for Connection.read() for the channels. The timeout is a maximum of printingChannelMaxTimeoutForRead/statusChannelMaxTimeoutForRead milliseconds for any data to be received on the printing/status channels respectively. If no more data is available after printingChannelTimeToWaitForMoreData/statusChannelTimeToWaitForMoreData milliseconds on the printing/status channels respectively the read operation is assumed to be complete.

Parameters:

uniqueId - the UUID of the device.

rmiServerPort - the port the RMI server is running on.

printingChannelMaxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received on the printing channel.

printingChannelTimeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read on the printing channel.

statusChannelMaxTimeoutForRead - the maximum time, in milliseconds, to wait for any data to be received on the status channel.

statusChannelTimeToWaitForMoreData - the maximum time, in milliseconds, to wait in-between reads after the initial read on the status channel.

Method Detail

getConnectionReestablisher

public ConnectionReestablisher getConnectionReestablisher(long thresholdTime)
                                                   throws ConnectionException

Description copied from interface: Connection

Returns a ConnectionReestablisher which allows for easy recreation of a connection which may have been closed.

• This call should be made while there is still an active connection to the printer (prior to issuing a command which will make the printer non-responsive).

Specified by:

getConnectionReestablisher in interface Connection

Overrides:

getConnectionReestablisher in class MultichannelConnection

Parameters:

thresholdTime - how long the Connection reestablisher will wait before attempting to reconnection to the printer

Returns:

ConnectionReestablisher

Throws:

ConnectionException - if the ConnectionReestablisher could not be created.

See Also:

ConnectionA.getConnectionReestablisher(long thresholdTime)

toString

public String toString()

Returns REMOTE_MULTI:[uniqueId]:[rmiServerPort].
The uniqueId and rmiServerPort are the parameters which were passed into the constructor.

Specified by:

toString in interface Connection

Overrides:

toString in class Object

Returns:

the connection description string.

See Also:

Object.toString()

getSimpleConnectionName

public String getSimpleConnectionName()

Return the remote connection unique id of the printer port as the description.

Returns:

a human-readable description of the connection.

See Also:

Connection.getSimpleConnectionName()