| Title: | Client to access AnnotationHub resources |
|---|---|
| Description: | This package provides a client for the Bioconductor AnnotationHub web resource. The AnnotationHub web resource provides a central location where genomic files (e.g., VCF, bed, wig) and other resources from standard locations (e.g., UCSC, Ensembl) can be discovered. The resource includes metadata about each resource, e.g., a textual description, tags, and date of modification. The client creates and manages a local cache of files retrieved by the user, helping with quick and reproducible access. |
| Authors: | Bioconductor Package Maintainer [cre], Martin Morgan [aut], Marc Carlson [ctb], Dan Tenenbaum [ctb], Sonali Arora [ctb], Valerie Oberchain [ctb], Kayla Morrell [ctb], Lori Shepherd [aut] |
| Maintainer: | Bioconductor Package Maintainer <[email protected]> |
| License: | Artistic-2.0 |
| Version: | 3.15.0 |
| Built: | 2024-11-29 03:42:11 UTC |
| Source: | https://github.com/bioc/AnnotationHub |
Client for discovery and retrieval of Bioconductor annotation resources.
Martin Morgan [email protected]
AnnotationHub-class
## Not run: library(AnnotationHub) hub = AnnotationHub() hub ## End(Not run)## Not run: library(AnnotationHub) hub = AnnotationHub() hub ## End(Not run)
Use AnnotationHub to interact with Bioconductor's AnnotationHub
service. Query the instance to discover and use resources that are of
interest, and then easily download and import the resource into R for
immediate use.
Use AnnotationHub() to retrieve information about all records
in the hub. If working offline, add argument localHub=TRUE to
work with a local, non-updated hub; It will only have resources
available that have previously been downloaded. If offline, Please
also see BiocManager vignette section on offline use to ensure proper
funcionality. To force redownload of the hub,
refreshHub(hubClass="AnnotationHub") can be utilized.
If you are operating behind a proxy please see the AnnotationHub Vignette section on "Accessing behind a Proxy" for setting up configuration to allow AnnotationHub to run properly.
Discover records in a hub using mcols(), query(),
subset(), and [.
Retrieve individual records using [[. On first use of a
resource, the corresponding files or other hub resources are
downloaded from the internet to a local cache. On this and all
subsequent uses the files are quickly input from the cache into the R
session. If a user wants to download the file again and not use the
cache version add the argument force=TRUE.
AnnotationHub records can be added (and sometimes removed) at
any time. snapshotDate() restricts hub records to those
available at the time of the snapshot. possibleDates() lists
snapshot dates valid for the current version of Bioconductor. You can
check the status of a past record using recordStatus().
The location of the local cache can be found (and updated) with
getAnnotationHubCache and setAnnotationHubCache;
removeCache removes all cache resources.
For common hub troubleshooting, please see the AnnotationHub vignette entitled 'vignette("TroubleshootingTheHubs", package="AnnotationHub")'.
AnnotationHub(..., hub=getAnnotationHubOption("URL"),
cache=getAnnotationHubOption("CACHE"),
proxy=getAnnotationHubOption("PROXY"),
localHub=getAnnotationHubOption("LOCAL")):Create an AnnotationHub instance, possibly updating the
current database of records.
In the code snippets below, x and object are
AnnotationHub objects.
hubCache(x):Gets the file system location of the local AnnotationHub cache.
hubUrl(x):Gets the URL for the online hub.
isLocalHub(x):Get whether or not constructor was called with localHub=TRUE.
length(x):Get the number of hub records.
names(x):Get the names (AnnotationHub unique identifiers, of the form AH12345) of the hub records.
fileName(x):Get the file path of the hub records as stored in the local cache (AnnotationHub files are stored as unique numbers, of the form 12345). NA is returned for those records which have not been cached.
mcols(x):Get the metadata columns describing each record. Columns include:
Record title, frequently the file name of the object.
Original provider of the resource, e.g., Ensembl, UCSC.
The species for which the record is most relevant, e.g., ‘Homo sapiens’.
NCBI taxonomy identifier of the species.
Genome build relevant to the record, e.g., hg19.
Textual description of the resource, frequently automatically generated from file path and other information available when the record was created.
Single words added to the record to facilitate identification, e.g,. TCGA, Roadmap.
The class of the R object used to represent
the object when imported into R, e.g., GRanges,
VCFFile.
Original URL of the resource.
Format of the original resource, e.g., BED file.
dbconn(x):Return an open connection to the underyling SQLite database.
dbfile(x):Return the full path the underyling SQLite database.
.db_close(conn):Close the SQLite connection conn returned by dbconn(x).
In the code snippets below, x is an AnnotationHub object.
x$name:Convenient reference to individual metadata columns, e.g.,
x$species.
x[i]:Numerical, logical, or character vector (of AnnotationHub names)
to subset the hub, e.g., x[x$species == "Homo sapiens"].
x[[i, force=FALSE, verbose=TRUE]]:Numerical or character scalar to retrieve (if necessary) and
import the resource into R. If a user wants to download the file
again and not use the cache version add the argument
force=TRUE. verbose=FALSE will quiet status messages.
query(x, pattern, ignore.case=TRUE, pattern.op= `&`):Return an AnnotationHub subset containing only those elements
whose metadata matches pattern. Matching uses
pattern as in grepl to search the
as.character representation of each column, performing a
logical `&` across columns.
e.g., query(x, c("Homo sapiens", "hg19", "GTF")).
patternA character vector of patterns to search
(via grepl) for in any of the mcols() columns.
ignore.caseA logical(1) vector indicating whether the search should ignore case (TRUE) or not (FALSE).
pattern.opAny function of two arguments,
describing how matches across pattern elements are to be
combined. The default `&` requires that only records
with all elements of pattern in their metadata
columns are returned. `&`, `|` and `!`
are most notably available. See "?&" or
?base::Ops for more information.
subset(x, subset):Return the subset of records containing only those elements whose
metadata satisfies the expression in subset. The
expression can reference columns of mcols(x), and should
return a logical vector of length length(x).
e.g., subset(x, species == "Homo sapiens" &
genome=="GRCh38").
recordStatus(hub, record):Returns a data.frame of the record id and status. hub must
be a Hub object and record must be a character(1).
Can be used to discover why a resource was removed from the hub.
In the code snippets below, x is an AnnotationHub object.
snapshotDate(x): and snapshotDate(x) <- value:
Gets or sets the date for the snapshot in use. value should
be one of possibleDates().
possibleDates(x):Lists the valid snapshot dates for the version of Bioconductor that is being run (e.g., BiocManager::version()).
cache(x): and cache(x) <- NULL: Adds (downloads) all
resources in x, or removes all local resources
corresponding to the records in x from the cache. In the later case,
x would typically be a small subset of AnnotationHub
resources. If x is a subset hub from a larger hub, and
localHub=TRUE was used to construct the hubs,
the original object will need to be reconstructed to reflect the
removed resources. See also removeResources for a nicer interface
for removing cached resources, or removeCache for deleting the hub
cache entirely.
hubUrl(x):Gets the URL for the online AnnotationHub.
hubCache(x):Gets the file system location of the local AnnotationHub cache.
refreshHub(..., hub, cache, proxy,
hubClass=c("AnnotationHub", "ExperimentHub")):Force redownload of Hub sqlite file. This returns a Hub object as
if calling the constructor (ie. AnnotationHub()). For force
redownload specifically for AnnotationHub the base call should be
refreshHub(hubClass="AnnotationHub")
removeResources(hub, ids):Removes listed ids from the local cache. ids are "AH" ids. Returns
an updated hub object. To work with updated hub object suggested
syntax is to reassign (ie. hub = removeResources(hub,
"AH1")). If ids are missing will remove all previously downloaded
local resources.
removeCache(x, ask=TRUE):Removes local AnnotationHub database and all related resources. After calling this function, the user will have to download any AnnotationHub resources again.
In the code snippets below, x is an AnnotationHub object.
as.list(x):Coerce x to a list of hub instances, one entry per element. Primarily for internal use.
c(x, ...):Concatenate one or more sub-hub. Sub-hubs must reference the same AnnotationHub instance. Duplicate entries are removed.
Martin Morgan, Marc Carlson, Sonali Arora, Dan Tenenbaum, and Lori Shepherd
## create an AnnotationHub object library(AnnotationHub) ah = AnnotationHub() ## Summary of available records ah ## Detail for a single record ah[1] ## and what is the date we are using? snapshotDate(ah) ## how many resources? length(ah) ## from which resources, is data available? head(sort(table(ah$dataprovider), decreasing=TRUE)) ## from which species, is data available ? head(sort(table(ah$species),decreasing=TRUE)) ## what web service and local cache does this AnnotationHub point to? hubUrl(ah) hubCache(ah) ### Examples ### ## One can search the hub for multiple strings ahs2 <- query(ah, c("GTF", "77","Ensembl", "Homo sapiens")) ## information about the file can be retrieved using ahs2[1] ## one can further extract information from this show method ## like the sourceurl using: ahs2$sourceurl ahs2$description ahs2$title ## We can download a file by name like this (using a list semantic): gr <- ahs2[[1]] ## And we can also extract it by the names like this: res <- ah[["AH28812"]] ## the gtf file is returned as a GenomicRanges object and contains ## data about which organism it belongs to, its seqlevels and seqlengths seqinfo(gr) ## each GenomicRanges contains a metadata slot which can be used to get ## the name of the hub object and other associated metadata. metadata(gr) ah[metadata(gr)$AnnotationHubName] ## And we can also use "[" to restrict the things that are in the ## AnnotationHub object (by position, character, or logical vector). ## Here is a demo of position: subHub <- ah[1:3] ## recordStatus recordStatus(ah, "TEST") recordStatus(ah, "AH7220")## create an AnnotationHub object library(AnnotationHub) ah = AnnotationHub() ## Summary of available records ah ## Detail for a single record ah[1] ## and what is the date we are using? snapshotDate(ah) ## how many resources? length(ah) ## from which resources, is data available? head(sort(table(ah$dataprovider), decreasing=TRUE)) ## from which species, is data available ? head(sort(table(ah$species),decreasing=TRUE)) ## what web service and local cache does this AnnotationHub point to? hubUrl(ah) hubCache(ah) ### Examples ### ## One can search the hub for multiple strings ahs2 <- query(ah, c("GTF", "77","Ensembl", "Homo sapiens")) ## information about the file can be retrieved using ahs2[1] ## one can further extract information from this show method ## like the sourceurl using: ahs2$sourceurl ahs2$description ahs2$title ## We can download a file by name like this (using a list semantic): gr <- ahs2[[1]] ## And we can also extract it by the names like this: res <- ah[["AH28812"]] ## the gtf file is returned as a GenomicRanges object and contains ## data about which organism it belongs to, its seqlevels and seqlengths seqinfo(gr) ## each GenomicRanges contains a metadata slot which can be used to get ## the name of the hub object and other associated metadata. metadata(gr) ah[metadata(gr)$AnnotationHubName] ## And we can also use "[" to restrict the things that are in the ## AnnotationHub object (by position, character, or logical vector). ## Here is a demo of position: subHub <- ah[1:3] ## recordStatus recordStatus(ah, "TEST") recordStatus(ah, "AH7220")
The Hub class was updated to utilize BiocFileCache to allow for file level caching control. This update changed the way files were stored and named. As a convenience for AnnotationHub and ExperimentHub we have provided this helper function to try to re-download files and add them into the BiocFileCache tracking database.
convertHub(oldcachepath=NULL, newcachepath=NULL, hubType=c("AnnotationHub", "ExperimentHub"), proxy=getAnnotationHubOption("PROXY"), max.downloads=getAnnotationHubOption("MAX_DOWNLOADS"), force=FALSE, verbose=TRUE)convertHub(oldcachepath=NULL, newcachepath=NULL, hubType=c("AnnotationHub", "ExperimentHub"), proxy=getAnnotationHubOption("PROXY"), max.downloads=getAnnotationHubOption("MAX_DOWNLOADS"), force=FALSE, verbose=TRUE)
oldcachepath |
character(1) complete file path location of the
old hub to be converted. If left as |
newcachepath |
character(1) complete file path to the new
location for the cache. If left as |
hubType |
Either AnnotationHub or ExperimentHub. By default assumes AnnotationHub. |
proxy |
proxy connection allowing Internet access, usually through a restrictive firewall. Default: NULL. |
max.downloads |
numeric(1). The integer number of downloads allowed before triggering a warning. This is to help avoid accidental download of a large number of AnnotationHub members |
force |
logical(1). Force re-download of a resource rather than using a cached version. |
verbose |
logical(1). Print out status messages. |
character(1). File path of new cache location. If verbose
also prints status messages for downloading files and any files that
were not redownloaded.
Lori Shepherd
AnnotationHub,
getAnnotationHubOption,
getInfoOnIds
# To transition over from old default to new default location ## Not run: convertHub()# To transition over from old default to new default location ## Not run: convertHub()
These functions get or set options for creation of new ‘AnnotationHub’ instances.
getAnnotationHubOption(arg) setAnnotationHubOption(arg, value)getAnnotationHubOption(arg) setAnnotationHubOption(arg, value)
arg |
The character(1) hub options to set. see ‘Details’ for current options. |
value |
The value to be assigned to the hub option. |
Supported options include:
character(1). The base URL of the annotation hub. Default: https://annotationhub.bioconductor.org
character(1). The location of the hub
cache. Default: “AnnotationHub” in the user's directory
established by tools::R_user_dir().
numeric(1). The integer number of downloads allowed before triggering an error. This is to help avoid accidental download of a large number of AnnotationHub members.
request object returned by
httr::use_proxy(). The request object describes a proxy
connection allowing Internet access, usually through a restrictive
firewall. Setting this option sends all AnnotationHub requests through
the proxy. Default: NULL.
In setAnnotationHubOption("PROXY", value), value can be one of NULL,
a request object returned by httr::use_proxy(), or a
well-formed URL as character(1). The URL can be completely
specified by http://username:[email protected]:8080;
username:password and port (e.g. :8080) are
optional.If behind a proxy it will also be useful to set the
httr::set_config(proxy) with the proxy information.
logical(1). TRUE/FALSE should the AnnotationHub create a hub consisting only of previously downloaded resourcesd. Default: FALSE.
logical(1). TRUE/FALSE should the AnnotationHub ask if the hub location should be created. If FALSE, the default location will be used and created if it doesn't exist without asking. If TRUE will ask the user and if in a non interactive session utilize a temporary directoy for the caching. Default: TRUE.
Default values may also be determined by system and global R
environment variables visible before the package is loaded. Use
options or variables preceeded by “ANNOTATION_HUB_”, e.g.,
options(ANNOTATION_HUB_MAX_DOWNLOADS=10) prior to package load
sets the default number of downloads to 10.
The requested or successfully set option.
Martin Morgan and Lori Shepherd
getAnnotationHubOption("URL") ## Not run: setAnnotationHubOption("CACHE", "~/.myHub") ## End(Not run)getAnnotationHubOption("URL") ## Not run: setAnnotationHubOption("CACHE", "~/.myHub") ## End(Not run)
Gets information from the Hub database for the given selection of ids. The information collected is ah_id, fetch_id, title, rdataclass, availablitiy status, biocversion when added, date when added, date when removed, and file size.
getInfoOnIds(hub, ids)getInfoOnIds(hub, ids)
hub |
Hub object. |
ids |
List of ids to get from database. Can be left unset to use all active ids in the hub. If given, it is either a numeric or character vector. See details section. |
data.frame of information for selected ids. The information collected is ah_id, fetch_id, title, rdataclass, availablitiy status, biocversion when added, date when added, date when removed, and file size.
If a hub object is passed into the function with no ids given, it will
use all active ids associated with that hub object
(names(ah)). It is recommended to only run this option if you are
using a smaller subset Hub object. The ids argument can be specified as either a
character vector or a numeric vector. If using a character vector, the
function assumes the 'ah_ids' were used, and each entry takes the form
similar to c("AH2", "AH5012"). If a numeric vector is specified,
the function assume the 'fetch_ids' were used. The 'fetch_id' is the
identifier that is used for the file name. For older versions of the
cache these were the file names directly.
This function was designed as a helper function when converting between old versions of Hubs to the newer versions that utilize BiocFileCache. If files were not able to be redownloaded, one could put the ids into this function to get more information on them. Note: Some resources may appear available but could not be redownloaded. Most likely these files are rdataclass 'OrgDb'. 'OrgDb' are only valid for a given release cycle and are masked to any future release cycle. It is recommended to update to the current 'OrgDb' but if the old file was not able to be downloaded and still desired, one could download manually download using the fetch_id. Example if the file not able to be downloaded was "~./AnnotationHub/69303" then the fetch call is: "https://annotationhub.bioconductor.org/fetch/69303". While the convertHub function will not automatically download it is still possible to keep track in the cache by doing a manually addition. Although not recommended. In reality these file will not be updated so the original file could also still be used.
This function could also be a utility function to help determine any given resources download size.
Lori Shepherd
## Not run: getInfoOnIds(hub, c("AH2","AH5012")) getInfoOnIds(hub, 69303) ## End(Not run) # If using in conjunction with convertHub, # # File not downloaded options: # ## Not run: # 1. Use the original file. In reality the file is not going to be updated or should change. The original file does not need to be tracked and could now be referenced directly for usage. It will not be available in the Hub. # 2. You could simply download the file for use # The file will not change and not be updated so its static download not # in the cache is fine # You could type the following into a web browswer "https://annotationhub.bioconductor.org/fetch/69303" # or in R httr::GET("https://annotationhub.bioconductor.org/fetch/69303", write_disk(<pathToSave/69303>, overwrite=FALSE)) # 3. To add to a hub cache (not recommended) hub <- AnnotationHub() bfc <- AnnotationHub:::.get_cache(hub) # the hub creates the rname is in the format of 'ah_id : fetch_id' bfcadd(bfc, fpath="https://annotationhub.bioconductor.org/fetch/69303", rname="AH62557 : 69303") ## End(Not run)## Not run: getInfoOnIds(hub, c("AH2","AH5012")) getInfoOnIds(hub, 69303) ## End(Not run) # If using in conjunction with convertHub, # # File not downloaded options: # ## Not run: # 1. Use the original file. In reality the file is not going to be updated or should change. The original file does not need to be tracked and could now be referenced directly for usage. It will not be available in the Hub. # 2. You could simply download the file for use # The file will not change and not be updated so its static download not # in the cache is fine # You could type the following into a web browswer "https://annotationhub.bioconductor.org/fetch/69303" # or in R httr::GET("https://annotationhub.bioconductor.org/fetch/69303", write_disk(<pathToSave/69303>, overwrite=FALSE)) # 3. To add to a hub cache (not recommended) hub <- AnnotationHub() bfc <- AnnotationHub:::.get_cache(hub) # the hub creates the rname is in the format of 'ah_id : fetch_id' bfcadd(bfc, fpath="https://annotationhub.bioconductor.org/fetch/69303", rname="AH62557 : 69303") ## End(Not run)
List and load resources from ExperimentHub filtered by package name and optional search terms. Not Implemented for AnnotationHub.
Currently listResources and loadResources are only meaningful
for ExperimentHub objects.
When submitting resources to AnnotationHub or ExperimentHub a valid DispatchClass field must be specified in the inst/extdata/metadata.csv file for each resource. This list the currently available DispatchClass values and briefly how that class loads a resource. If your resource does not qualify for one of these methods contact Lori Shepherd [email protected] to request a new DispatchClass be added
Lori Shepherd
DispatchClassList()DispatchClassList()