// assembleJob prepares for printing a job by fetching the job's printer,
// ticket, and the job's PDF (what we're printing)
//
// The caller is responsible to remove the returned PDF file.
//
// Errors are returned as a string (last return value), for reporting
// to GCP and local logging.
func (pm *PrinterManager) assembleJob(job *lib.Job) (lib.Printer, cdd.CloudJobTicket, *os.File, string, cdd.PrintJobStateDiff) {
printer, exists := pm.gcpPrintersByGCPID.Get(job.GCPPrinterID)
if !exists {
return lib.Printer{}, cdd.CloudJobTicket{}, nil,
fmt.Sprintf("Failed to find GCP printer %s for job %s", job.GCPPrinterID, job.GCPJobID),
cdd.PrintJobStateDiff{
State: cdd.JobState{
Type: "STOPPED",
ServiceActionCause: &cdd.ServiceActionCause{ErrorCode: "PRINTER_DELETED"},
},
}
}
ticket, err := pm.gcp.Ticket(job.GCPJobID)
if err != nil {
return lib.Printer{}, cdd.CloudJobTicket{}, nil,
fmt.Sprintf("Failed to get a ticket for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: cdd.JobState{
Type: "STOPPED",
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: "INVALID_TICKET"},
},
}
}
pdfFile, err := cups.CreateTempFile()
if err != nil {
return lib.Printer{}, cdd.CloudJobTicket{}, nil,
fmt.Sprintf("Failed to create a temporary file for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: cdd.JobState{
Type: "STOPPED",
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: "OTHER"},
},
}
}
pm.downloadSemaphore.Acquire()
t := time.Now()
// Do not check err until semaphore is released and timer is stopped.
err = pm.gcp.Download(pdfFile, job.FileURL)
dt := time.Since(t)
pm.downloadSemaphore.Release()
if err != nil {
// Clean up this temporary file so the caller doesn't need extra logic.
os.Remove(pdfFile.Name())
return lib.Printer{}, cdd.CloudJobTicket{}, nil,
fmt.Sprintf("Failed to download PDF for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: cdd.JobState{
Type: "STOPPED",
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: "DOWNLOAD_FAILURE"},
},
}
}
glog.Infof("Downloaded job %s in %s", job.GCPJobID, dt.String())
pdfFile.Close()
return printer, ticket, pdfFile, "", cdd.PrintJobStateDiff{}
}
// assembleGCPJob prepares for printing a job by fetching the job's printer,
// ticket, and data (what we're printing)
//
// The caller is responsible to remove the returned file.
//
// Errors are returned as a string (last return value), for reporting
// to GCP and local logging.
func (pm *PrinterManager) assembleGCPJob(job *gcp.Job) (string, *cdd.CloudJobTicket, string, string, cdd.PrintJobStateDiff) {
_, exists := pm.gcpPrintersByGCPID.Get(job.GCPPrinterID)
if !exists {
return "", nil, "",
fmt.Sprintf("Failed to find GCP printer %s for job %s", job.GCPPrinterID, job.GCPJobID),
cdd.PrintJobStateDiff{
State: &cdd.JobState{
Type: cdd.JobStateAborted,
ServiceActionCause: &cdd.ServiceActionCause{ErrorCode: cdd.ServiceActionCausePrinterDeleted},
},
}
}
ticket, err := pm.gcp.Ticket(job.GCPJobID)
if err != nil {
return "", nil, "",
fmt.Sprintf("Failed to get a ticket for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: &cdd.JobState{
Type: cdd.JobStateAborted,
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: cdd.DeviceActionCauseInvalidTicket},
},
}
}
file, err := cups.CreateTempFile()
if err != nil {
return "", nil, "",
fmt.Sprintf("Failed to create a temporary file for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: &cdd.JobState{
Type: cdd.JobStateAborted,
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: cdd.DeviceActionCauseOther},
},
}
}
pm.downloadSemaphore.Acquire()
t := time.Now()
// Do not check err until semaphore is released and timer is stopped.
err = pm.gcp.Download(file, job.FileURL)
dt := time.Since(t)
pm.downloadSemaphore.Release()
if err != nil {
// Clean up this temporary file so the caller doesn't need extra logic.
os.Remove(file.Name())
return "", nil, "",
fmt.Sprintf("Failed to download data for job %s: %s", job.GCPJobID, err),
cdd.PrintJobStateDiff{
State: &cdd.JobState{
Type: cdd.JobStateAborted,
DeviceActionCause: &cdd.DeviceActionCause{ErrorCode: cdd.DeviceActionCauseDownloadFailure},
},
}
}
glog.Infof("Downloaded job %s in %s", job.GCPJobID, dt.String())
defer file.Close()
return job.GCPPrinterID, ticket, file.Name(), "", cdd.PrintJobStateDiff{}
}