GbifQueue

GBIF download queue

Public fields

reqs

(list) a named list of objects of class occ_download()

queue

(list) holds the queued jobs

Methods

Public methods

• GbifQueue$print()

• GbifQueue$new()

• GbifQueue$add()

• GbifQueue$add_all()

• GbifQueue$remove()

• GbifQueue$next_()

• GbifQueue$last_()

• GbifQueue$jobs()

• GbifQueue$clone()

---

Method print()

print method for the GbifQueue class

Usage

GbifQueue$print(x, ...)

Arguments

x

self

...

ignored

---

Method new()

Create a new GbifQueue object

Usage

GbifQueue$new(..., .list = list())

Arguments

...

any number of occ_download() requests

.list

any number of occ_download() requests as lazy objects, called with e.g., lazyeval::lazy()

Returns

A new GbifQueue object

---

Method add()

Add single jobs to the queue

Usage

GbifQueue$add(x)

Arguments

x

an occ_download() object

Returns

nothing returned; adds job (x) to the queue

---

Method add_all()

Add all jobs to the queue

Usage

GbifQueue$add_all()

Returns

nothing returned

---

Method remove()

Remove a job from the queue

Usage

GbifQueue$remove(x)

Arguments

x

an occ_download() object

Returns

nothing returned

---

Method next_()

Get the next job in the queue. if no more jobs, returns empty list

Usage

GbifQueue$next_()

Returns

next job or empty list

---

Method last_()

Get the last job in the queue. if no more jobs, returns empty list

Usage

GbifQueue$last_()

Returns

last job or empty list

---

Method jobs()

Get number of jobs in the queue

Usage

GbifQueue$jobs()

Returns

(integer) number of jobs

---

Method clone()

The objects of this class are cloneable with this method.

Usage

GbifQueue$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

if (FALSE) { # \dontrun{
if (interactive()) { # dont run in automated example runs, too costly
x <- GbifQueue$new(
  occ_download(pred('taxonKey', 3119195), pred("year", 1976)),
  occ_download(pred('taxonKey', 3119195), pred("year", 2001)),
  occ_download(pred('taxonKey', 3119195), pred("year", 2001), pred_lte("month", 8)),
  occ_download(pred('taxonKey', 3119195), pred("year", 2004)),
  occ_download(pred('taxonKey', 3119195), pred("year", 2005))
)
x
x$reqs
x$add_all()
x
x$jobs()
x
x$remove(x$reqs[[1]])
x
x$reqs[[1]]$run()
x$reqs[[1]]$result

# pre-prepared download request
z <- occ_download_prep(
  pred_in("basisOfRecord", c("HUMAN_OBSERVATION","OBSERVATION")),
  pred("hasCoordinate", TRUE),
  pred("hasGeospatialIssue", FALSE),
  pred("year", 1993),
  user = "foo", pwd = "bar", email = "foo@bar.com"
)
out <- GbifQueue$new(.list = list(z))
out
out$reqs
}} # }