我希望能够在网络打印机物理完成打印页面（和/或整个作业）时收到通知。这将用于我正在编写的通过网络进行打印管理的应用程序，并且由于用户按页面收费，并且在页面实际完成之前费用不应该下降。
我不确定这是否需要编写驱动程序、某种插件或客户端应用程序是否可以。我的平台很灵活，因为我的客户端还没有编写，所以我想听听 Windows 或 Linux 中任何合适的解决方案，任何编程语言/级别。
我知道假脱机程序和打印机之间存在差异。我正在尝试检查当页面或作业物理完成时打印机可能会在哪个级别通过 IPP 通知机器。
我目前正在研究 Java，使用jspi或cups4j包在 IPP 属性更改时获取通知job-impressions-completed ，或者轮询它。我正在使用连接本地打印机的 CUPS IPP 接口。运行一个简单的测试器（HelloPrint.java附在下面；或CupsTest.java包含在 cups4j 中），我没有收到任何job-impressions-completed属性更改，也没有在我轮询时列出作业的属性。
所以这里有问题：
- 这样做对吗？如果没有，那我该怎么做？
- 由于这是本地打印机的 CUPS 接口，因此
job-impressions-completed属性可能没有更新，特别是因为它充当真实打印机的假脱机程序。假设真正的打印机将通知或列出此属性，这将是特定于打印机的，还是任何支持 IPP 的打印机都必须提供并更新此属性？
系统信息：Ubuntu 11.10，CUPS 1.5.0，打印机是 Brother HL-2240D（PPD 可在此处获得）
注意：HL-2240D不是我将用于最终项目的打印机（具体来说，它不支持 IPP）；我打算使用 HP HL4250DN 或三星 3741ND 或类似产品。
javax.print这是一个使用包和 jspi的示例应用程序：
HelloPrint.java
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Date;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;
import javax.print.event.*;
import de.lohndirekt.print.IppPrintService;
public class HelloPrint {
/**
* @param args
*/
public static void main(String[] args) {
// create request attributes
PrintRequestAttributeSet requestAttributeSet = new HashPrintRequestAttributeSet();
requestAttributeSet.add(MediaSizeName.ISO_A4);
requestAttributeSet.add(new Copies(1));
requestAttributeSet.add(Sides.DUPLEX);
// find an appropriate service
// using jspi (http://code.google.com/p/jspi/)
URI printerURI;
try {
printerURI = new URI("ipp://localhost:631/printers/HL2240D-local");
} catch (URISyntaxException e2) {
e2.printStackTrace();
return;
}
IppPrintService service = new IppPrintService(printerURI);
// by enumerating
// PrintService[] services = PrintServiceLookup.lookupPrintServices(
// DocFlavor.INPUT_STREAM.PDF, requestAttributeSet);
// for (PrintService service1 : services) {
// System.out.println(service1);
// }
// PrintService service = services[0];
// add listeners to service
service.addPrintServiceAttributeListener(new PrintServiceAttributeListener() {
@Override
public void attributeUpdate(PrintServiceAttributeEvent event) {
PrintServiceAttributeSet serviceAttributeSet = event
.getAttributes();
StringBuilder s = new StringBuilder();
s.append("=== PrintServiceAttributeEvent: (" + serviceAttributeSet.size() + " attributes)\n");
for (Attribute attribute : serviceAttributeSet.toArray()) {
PrintServiceAttribute printServiceAttribute = (PrintServiceAttribute) attribute;
s.append(printServiceAttribute.getCategory().getName()
+ "/" + printServiceAttribute.getName() + " = "
+ printServiceAttribute.toString() + "\n");
}
System.out.println(s.toString());
}
});
// add file (blank.pdf is a blank page exported as PDF from LibreOffice
// Writer)
FileInputStream inputStream;
try {
inputStream = new FileInputStream("blank.pdf");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return;
}
// create a new doc and job
DocAttributeSet docAttributeSet = new HashDocAttributeSet();
docAttributeSet.add(MediaSizeName.ISO_A4);
docAttributeSet.add(Sides.DUPLEX);
Doc doc = new SimpleDoc(inputStream, DocFlavor.INPUT_STREAM.PDF,
docAttributeSet);
DocPrintJob job = service.createPrintJob();
// listen to print job attribute change events
// attribute set is null, means this means to listen on all dynamic
// attributes that the job supports.
job.addPrintJobAttributeListener(new PrintJobAttributeListener() {
@Override
public void attributeUpdate(PrintJobAttributeEvent event) {
PrintJobAttributeSet jobAttributeSet = event.getAttributes();
StringBuilder s = new StringBuilder();
s.append("=== PrintJobAttributeEvent: (" + jobAttributeSet.size() + " attributes)\n");
for (Attribute attribute : jobAttributeSet.toArray()) {
PrintJobAttribute jobAttribute = (PrintJobAttribute) attribute;
s.append(jobAttribute.getCategory().getName() + "/"
+ jobAttribute.getName() + " = "
+ jobAttribute.toString() + "\n");
}
System.out.println(s.toString());
}
}, null);
// listen to print job events
job.addPrintJobListener(new PrintJobListener() {
@Override
public void printJobRequiresAttention(PrintJobEvent pje) {
System.out.println("=== PrintJobEvent: printJobRequiresAttention");
}
@Override
public void printJobNoMoreEvents(PrintJobEvent pje) {
// TODO Auto-generated method stub
System.out.println("=== PrintJobEvent: printJobNoMoreEvents");
System.out.println(pje.getPrintEventType());
System.out.println(pje.toString());
}
@Override
public void printJobFailed(PrintJobEvent pje) {
// TODO Auto-generated method stub
System.out.println("=== PrintJobEvent: printJobFailed");
System.out.println(pje.getPrintEventType());
System.out.println(pje.toString());
}
@Override
public void printJobCompleted(PrintJobEvent pje) {
// TODO Auto-generated method stub
System.out.println("=== PrintJobEvent: printJobCompleted");
System.out.println(pje.getPrintEventType());
System.out.println(pje.toString());
}
@Override
public void printJobCanceled(PrintJobEvent pje) {
// TODO Auto-generated method stub
System.out.println("=== PrintJobEvent: printJobCanceled");
System.out.println(pje.getPrintEventType());
System.out.println(pje.toString());
}
@Override
public void printDataTransferCompleted(PrintJobEvent pje) {
System.out.println("=== PrintJobEvent: printDataTransferCompleted");
System.out.println(pje.getPrintEventType());
System.out.println(pje.toString());
}
});
// print
try {
job.print(doc, requestAttributeSet);
} catch (PrintException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return;
}
// try polling
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
System.out.println("=== Polling: I'm alive and it's " + new Date());
System.out.println("Job attributes");
for (Attribute attribute : job.getAttributes().toArray()) {
System.out.println((attribute.getCategory().getName() + "/"
+ attribute.getName() + " = " + attribute.toString()));
}
System.out.println("Service attributes");
for (Attribute attribute : service.getAttributes().toArray()) {
System.out.println((attribute.getCategory().getName() + "/"
+ attribute.getName() + " = " + attribute.toString()));
}
}
}
}