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Google Cloud Print (GCP) API for Java

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GoogleCloudPrint

Google Cloud Print (GCP) API for Java

document : https://developers.google.com/cloud-print/

About Capabilities :
There are two ways to do that:

  1. Load printer capabilities and create an XML(XPS format) file using Windows API. Ex.: Using "PrintQueue" class --> GetPrintCapabilitiesAsXml.WriteTo(file)
  2. Obtaining the PPD file of the PostScript printer.
    Uploading one of these files, GCP was able to understand the printer capabilities.

    Recommended from João Vianey (Google Cloud Print developer)
    Thank you very much.

Example

Connect to google cloud print ```java String email = "YOUR_GOOGLE_EMAIL"; String password = "YOUR_GOOGLE_PASSWORD";

GoogleCloudPrint cloudPrint = new GoogleCloudPrint();

//connect to google cloud print cloudPrint.connect(email, password, "geniustree-cloudprint-1.0");

<b>Disconnect from google cloud print</b>
```java
cloudPrint.disconnect();

Register printer

// create and setup printer

RegisterPrinterResponse response = cloudPrint.registerPrinter(printer);
InputStream inputStream = null;
try {
    //URL ppdURL = Example.class.getResource("/ppd/ADIST5CS.PPD");
    URL xpsURL = Example.class.getResource("/xml/XPSCapabilities.xml");
    
    File capabilitiesFile = new File(xpsURL.getPath());
    inputStream = new FileInputStream(capabilitiesFile);


    /*
    * require
    * - printer name
    * - display name
    * - proxy
    * - capabilities 
    * - defaults
    * - tag
    * - status
    * - description
    * - capsHash
    */

    Printer printer = new Printer();
    printer.setName("Test Printer");
    printer.setDisplayName("Test Printer");
    printer.setProxy("pamarin");
    Set<String> tags = new HashSet<String>();
    tags.add("test");
    tags.add("register");
    printer.setTags(tags);

    String capsHash = DigestUtils.sha512Hex(inputStream);
    printer.setCapsHash(capsHash);
    printer.setStatus("REGISTER");
    printer.setDescription("test register printer");
    printer.setCapabilities(capabilitiesFile);
    printer.setDefaults(capabilitiesFile);

    RegisterPrinterResponse response = cloudPrint.registerPrinter(printer);
    if (!response.isSuccess()) {
        LOG.debug("message = > {}", response.getMessage());
        return;
    }
    
    for (Printer print : response.getPrinters()) {
        LOG.debug("printer response => {}", print);
    }
} catch (IOException ex) {
    LOG.warn(null, ex);
} catch (CloudPrintException ex) {
    LOG.warn(null, ex);
} finally {
    if (inputStream != null) {
        try {
            inputStream.close();
        } catch (IOException ex) {
            LOG.warn(null, ex);
        }
    }
}

Job listener (listener job from google talk notification)

cloudPrint.addJobListener(new JobListener() {
    //
    @Override
    public void onJobArrive(Job job, boolean success, String message) {
    
        //do something ...
    
    }
});    
cloudPrint.addJobListener(new JobListener() {
    //
    @Override
    public void onJobArrive(Job job, boolean success, String message) {
        if (success) {
            try {
                LOG.debug("job arrive => {}", job);
                File directory = new File("C:\\temp\\cloudPrint");
                if (!directory.exists()) {
                  directory.mkdirs();
                }

                //download print file from google cloud print     
                String fileName = FilenameUtils.removeExtension(job.getTitle()) + ".pdf";
                File outputFile = new File(directory, fileName);
                 
                cloudPrint.downloadFile(job.getFileUrl(), outputFile);
        
 
 
                //do something...
                
                
                //get job information or printing option such as
                // - document collate 
                // - page output color 
                // - page orientation 
                // - page media size 
                // - duplex page 
                // - copies document
                // ...
                // response is XML format
                String ticketResponse = cloudPrint.getJobTicket(job.getTicketUrl());
                LOG.debug("ticketResponse => {}", ticketResponse);



                //update job status
                ControlJobResponse response = cloudPrint.controlJob(job.getId(), JobStatus.DONE, 200, "success.");
                LOG.debug("control job response=> {}", response.isSuccess() + ", " + response.getMessage());
            } catch (CloudPrintException ex) {
                LOG.warn(null, ex);
            }
        } else {
            LOG.info("job arrive error message => {}", message);
        }
    }
});

Submit job (send job to google cloud print)

//create and setup job

SubmitJobResponse response = cloudPrint.submitJob(submitJob);
//send job to target printer
//printer id = "810c1d39-981f-cd36-5fdc-951ea5e62613"

InputStream jsonInputStream = null;
InputStream imageInputStream = null;
try {
    jsonInputStream = Example.class.getResourceAsStream("/json/submitJobTicketRequest.json");
    imageInputStream = Example.class.getResourceAsStream("/testImage.png");
    byte[] content = IOUtils.toByteArray(imageInputStream);

    //get job option from json file
    //such as  
    // - document collate 
    // - page output color 
    // - page orientation 
    // - page media size 
    // - duplex page 
    // - copies document
    // ...
    String jsonTicket = IOUtils.toString(jsonInputStream);
    Ticket ticket = gson.fromJson(jsonTicket, Ticket.class);

    String json = gson.toJson(ticket);
    LOG.debug("json => {}", json);
    
    //create job
    SubmitJob submitJob = new SubmitJob();
    submitJob.setContent(content);
    submitJob.setContentType("image/png");
    submitJob.setPrinterId("810c1d39-981f-cd36-5fdc-951ea5e62613"); //*****
    submitJob.setTag(Arrays.asList("koalar", "hippo", "cloud"));
    submitJob.setTicket(ticket);
    submitJob.setTitle("testImage.png");

    //send job
    SubmitJobResponse response = cloudPrint.submitJob(submitJob);
    LOG.debug("submit job response => {}", response.isSuccess() + "," + response.getMessage());
    LOG.debug("submit job id => {}", response.getJob().getId());

    //control job (update job)
    //...
    //...
} catch (Exception ex) {
    LOG.warn(null, ex);
} finally {
    if (jsonInputStream != null) {
        try {
            jsonInputStream.close();
        } catch (IOException ex) {
            LOG.warn(null, ex);
        }
    }

    if (imageInputStream != null) {
        try {
            imageInputStream.close();
        } catch (IOException ex) {
            LOG.warn(null, ex);
        }
    }
}

Delete job

//jobId generate by google cloud print

DeleteJobResponse response = cloudPrint.deleteJob(jobId);
LOG.debug("delete job response => {}", response.isSuccess() + ", " + response.getMessage());

Update printer informaton

//printer id = "a1dbe503-eb96-6d26-dc7b-a290a1cfaf3b"

Printer printer = new Printer();
printer.setId("a1dbe503-eb96-6d26-dc7b-a290a1cfaf3b");
printer.setName("Adobe PDF2"); //set new name
printer.setDisplayName("Adobe PDF2");

UpdatePrinterResponse response = cloudPrint.updatePrinter(printer);
LOG.debug("update printer response => {}", response.isSuccess() + ", " + response.getMessage());

Search printer

//search all printers which name is "fax"
//PrinterStatus.ALL is all printer status 
// - ONLINE
// - UNKNOWN
// - OFFLINE
// - DORMANT

SearchPrinterResponse response = cloudPrint.searchPrinter("fax", PrinterStatus.ALL);
if (!response.isSuccess()) {
    LOG.debug("message = > {}", response.getMessage());
    return;
}

for (Printer printer : response.getPrinters()) {
    LOG.debug("printer => {}", printer);
}

Get printer information

//printer id = "dc6929f5-8fdc-5228-1e73-c9dee3298445"

PrinterInformationResponse response = cloudPrint.getPrinterInformation("dc6929f5-8fdc-5228-1e73-c9dee3298445");
if (!response.isSuccess()) {
    LOG.debug("message = > {}", response.getMessage());
    return;
}

for (Printer printer : response.getPrinters()) {
    LOG.debug("printer information response => {}", printer);
}

Update job status (Control job)

//parameter
//job id : get from subscribe job (generate by google cloud print)
//job status : 
// - QUEUED
// - IN_PROGRESS
// - DONE
// - ERROR
//job code : get from printer
//job message : get from printer

ControlJobResponse response = cloudPrint.controlJob(job.getId(), JobStatus.IN_PROGRESS, 100, "PROGRESSING.");
LOG.debug("control job response=> {}", response.isSuccess() + ", " + response.getMessage());

Get job (print job)
get all jobs

JobResponse response = cloudPrint.getJobs();
if (!response.isSuccess()) {
    LOG.debug("message = > {}", response.getMessage());
    return;
}

for (Job job : response.getJobs()) {
    LOG.debug("job response => {}", job);
}

get job of printer

//printer id = "dc6929f5-8fdc-5228-1e73-c9dee3298445"

JobResponse response = cloudPrint.getJobOfPrinter("dc6929f5-8fdc-5228-1e73-c9dee3298445");
if (!response.isSuccess()) {
    LOG.debug("message = > {}", response.getMessage());
    return;
}

for (Job job : response.getJobs()) {
    LOG.debug("job response => {}", job);
}

Delete printer

//printer id = "12280cbe-6486-2c98-c65a-22083bd18b5b"

DeletePrinterResponse response = cloudPrint.deletePrinter("12280cbe-6486-2c98-c65a-22083bd18b5b");
LOG.debug("delete printer response => {}", response.isSuccess() + ", " + response.getMessage());

Share printer

//printer id = "dc6929f5-8fdc-5228-1e73-c9dee3298445"
//target email = "jittagorn@geniustree.co.th"

SharePrinterResponse response = cloudPrint.sharePrinter("dc6929f5-8fdc-5228-1e73-c9dee3298445", "jittagorn@geniustree.co.th");
LOG.debug("share printer message => {}", response.isSuccess() + ", " + response.getMessage());

develop by jittagorn pitakmetagoon
java developer Thailand
work at Geniustree Co., Ltd
blog : na5cent.blogspot.com
email : jittagorn@geniustree.co.th

About

Google Cloud Print (GCP) API for Java

License:Apache License 2.0

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