我希望能够在物理完成打印页面(和/或整个作业)时从网络打印机获得通知。这将用于我正在通过网络进行打印管理的应用程序,并且由于用户每页都收取费用,并且在页面实际完成之前不应停止收费。如何在物理页面/作业完成时从打印机获取通知
我不确定这是否需要编写驱动程序,某种插件或者客户端应用程序能否完成。我对我的平台很灵活,因为我的客户端还没有写入,所以我想在任何编程语言/级别的Windows或Linux中听到任何合适的解决方案。
我知道假脱机程序和打印机之间是有区别的。我试图检查打印机在哪个级别通过IPP通知机器何时完成页面或作业。
我正在调查Java,使用jspi或cups4j程序包获取IPP属性job-impressions-completed
更改时的通知,或者轮询它。我正在使用本地打印机的CUPS IPP接口。运行一个简单的测试程序(HelloPrint.java
附在下面;或包含在cups4j中),我没有收到任何job-impressions-completed
属性更改,也没有列出我在投票时作业的属性。
所以这里的问题:
- 要这么做吗?如果不是,那我该怎么做呢?
- 由于这是CUPS接口到本地打印机,它可能是
job-impressions-completed
属性没有被更新,特别是因为它充当真正的打印机假脱机程序。假设真实打印机将通知或列出此属性,这是打印机特定的还是必须任何支持IPP的打印机都可以使用此属性并进行更新?
系统信息:Ubuntu的11.10,CUPS 1.5.0,打印机是兄弟HL-2240D(PPD available here)
注:HL-2240D是不我将使用为最终项目打印机(具体而言,它不支持IPP);我打算使用HP HL4250DN或三星3741ND或类似产品。
下面是一个使用javax.print
包和jspi一个示例应用程序:
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()));
}
}
}
}
嗯,我认为“我如何监控物理打印作业进度”是一个合适的问题。我考虑了你的意见,希望这个问题的版本更清晰(甚至可能会得到回答!) – Yuval 2012-04-12 15:01:13
您的修改后的问题非常适合。感谢(大量)编辑;它现在好多了。 :) – 2012-04-12 15:45:03
嗨Yuval,你能找到你的问题的答案? 我有同样的要求,并且找不到解决方案。 – 2012-08-27 23:20:17