Beanstalk::Client(3) User Contributed Perl Documentation Beanstalk::Client(3)NAMEBeanstalk::Client - Client class to talk to beanstalkd server
SYNOPSIS
use Beanstalk::Client;
my $client = Beanstalk::Client->new(
{ server => "localhost",
default_tube => 'mine',
}
);
# Send a job with explicit data
my $job = $client->put(
{ data => "data",
priority => 100,
ttr => 120,
delay => 5,
}
);
# Send job, data created by encoding @args. By default with YAML
my $job2 = $client->put(
{ priority => 100,
ttr => 120,
delay => 5,
},
@args
);
# Send job, data created by encoding @args with JSON
use JSON::XS;
$client->encoder(sub { encode_json(\@_) });
my $job2 = $client->put(
{ priority => 100,
ttr => 120,
delay => 5,
},
@args
);
# fetch a job
my $job3 = $client->reserve;
DESCRIPTIONBeanstalk::Client provides a Perl API of protocol version 1.0 to the
beanstalkd server, a fast, general-purpose, in-memory workqueue service
by Keith Rarick.
METHODS
Constructor
new ($options)
The constructor accepts a single argument, which is a reference to
a hash containing options. The options can be any of the accessor
methods listed below.
Accessor Methods
server ([$hostname])
Get/set the hostname, and port, to connect to. The port, which
defaults to 11300, can be specified by appending it to the hostname
with a ":" (eg "localhost:1234"). (Default: "localhost:11300")
socket
Get the socket connection to the server.
delay ([$delay])
Set/get a default value, in seconds, for job delay. A job with a
delay will be placed into a delayed state and will not be placed
into the ready queue until the time period has passed. This value
will be used by "put" and "release" as a default. (Default: 0)
ttr ([$ttr])
Set/get a default value, in seconds, for job ttr (time to run).
This value will be used by "put" as a default. (Default: 120)
priority ([$priority])
Set/get a default value for job priority. The highest priority job
is the job where the priority value is the lowest (ie jobs with a
lower priority value are run first). This value will be used by
"put", "release" and "bury" as a default. (Default: 10000)
encoder ([$encoder])
Set/get serialization encoder. $encoder is a reference to a
subroutine that will be called when arguments to "put" need to be
encoded to send to the beanstalkd server. The subroutine should
accept a list of arguments and return a string representation to
pass to the server. (Default: YAML::Syck::Dump)
decoder ([$decoder])
Set/get the serialization decoder. $decoder is a reference to a
subroutine that will be called when data from the beanstalkd server
needs to be decoded. The subroutine will be passed the data fetched
from the beanstalkd server and should return a list of values the
application can use. (Default: YAML::Syck::Load)
error
Fetch the last error that happened.
connect_timeout ([$timeout])
Get/set timeout, in seconds, to use for the connect to the server.
default_tube ([$tube])
Set/get the name of a default tube to put jobs into and fetch from.
By default a connection to a beanstalkd server will put into the
"default" queue and also watch the "default" queue. If
"default_tube" is set when "connect" is called the connection will
be initialized so that "put" will put into the given tube and
"reserve" will fetch jobs from the given tube. (Default: none)
debug ([$debug])
Set/get debug value. If set to a true value then all communication
with the server will be output with "warn"
Producer Methods
These methods are used by clients that are placing work into the queue
put ($options [, @args])
Insert job into the currently used tube. Options may be
priority
priority to use to queue the job. Jobs with smaller priority
values will be scheduled before jobs with larger priorities.
The most urgent priority is 0
Defaults to "$self-"priority>
delay
An integer number of seconds to wait before putting the job in
the ready queue. The job will be in the "delayed" state
during this time
Defaults to "$self-"delay>
ttr "time to run" - An integer number of seconds to allow a worker
to run this job. This time is counted from the moment a worker
reserves this job. If the worker does not delete, release, or
bury the job within "ttr" seconds, the job will time out and
the server will release the job. The minimum ttr is 1. If the
client sends 0, the server will silently increase the ttr to 1.
data
The job body. Defaults to the result of calling the current
encoder passing @args
use ($tube)
Change tube that new jobs are inserted into
Worker Methods
reserve ([$timeout])
Reserve a job from the list of tubes currently being watched.
Returns a Beanstalk::Job on success. $timeout is the maximum number
of seconds to wait for a job to become ready. If $timeout is not
given then the client will wait indefinitely.
Returns undef on error or if $timeout expires.
delete ($id)
Delete the specified job.
release ($id, [, $options])
Release the specified job. Valid options are
priority
New priority to assign to the job
delay
An integer number of seconds to wait before putting the job in
the ready queue. The job will be in the "delayed" state during
this time
bury ($id [, $options])
The bury command puts a job into the "buried" state. Buried jobs
are put into a FIFO linked list and will not be touched by the
server again until a client kicks them with the "kick" command.
Valid options are
priority
New priority to assign to the job
touch ($id)
Calling "touch" with the id of a reserved job will reset the time
left for the job to complete back to the original ttr value.
watch ($tube)
Specifies a tube to add to the watch list. If the tube doesn't
exist, it will be created
ignore ($tube)
Stop watching $tube
watch_only (@tubes)
Watch only the list of given tube names
Other Methods
connect
Connect to server. If sucessful, set the tube to use and tube to
watch if a "default_tube" was specified.
disconnect
Disconnect from server. "socket" method will return undef.
quit
Disconnect from server. "socket" method will return undef.
peek ($id)
Peek at the job id specified. If the job exists returns a
Beanstalk::Job object. Returns "undef" on error or if job does not
exist.
peek_ready
Peek at the first job that is in the ready queue. If there is a job
in the ready queue returns a Beanstalk::Job object. Returns "undef"
on error or if there are no ready jobs.
peek_delayed
Peek at the first job that is in the delayed queue. If there is a
job in the delayed queue returns a Beanstalk::Job object. Returns
"undef" on error or if there are no delayed jobs.
peek_buried
Peek at the first job that is in the buried queue. If there is a
job in the buried queue returns a Beanstalk::Job object. Returns
"undef" on error or if there are no buried jobs.
kick ($bound)
The kick command applies only to the currently used tube. It moves
jobs into the ready queue. If there are any buried jobs, it will
only kick buried jobs. Otherwise it will kick delayed jobs. The
server will not kick more than $bound jobs. Returns the number of
jobs kicked, or undef if there was an error.
stats_job ($id)
Return stats for the specified job $id. Returns "undef" on error.
If the job exists, the return will be a Stats object with the
following methods
· id - The job id
· tube - The name of the tube that contains this job
· state - is "ready" or "delayed" or "reserved" or "buried"
· pri - The priority value set by the put, release, or bury
commands.
· age - The time in seconds since the put command that created
this job.
· time_left - The number of seconds left until the server puts
this job into the ready queue. This number is only meaningful
if the job is reserved or delayed. If the job is reserved and
this amount of time elapses before its state changes, it is
considered to have timed out.
· reserves - The number of times this job has been reserved
· timeouts - The number of times this job has timed out during a
reservation.
· releases - The number of times a client has released this job
from a reservation.
· buries - The number of times this job has been buried.
· kicks - The number of times this job has been kicked.
stats_tube ($tube)
Return stats for the specified tube $tube. Returns "undef" on
error.
If the tube exists, the return will be a Stats object with the
following methods
· name - The tube's name.
· current_jobs_urgent - The number of ready jobs with priority <
1024 in this tube.
· current_jobs_ready - The number of jobs in the ready queue in
this tube.
· current_jobs_reserved - The number of jobs reserved by all
clients in this tube.
· current_jobs_delayed - The number of delayed jobs in this tube.
· current_jobs_buried - The number of buried jobs in this tube.
· total_jobs - The cumulative count of jobs created in this tube.
· current_waiting - The number of open connections that have
issued a reserve command while watching this tube but not yet
received a response.
· pause - The number of seconds the tube has been paused for.
· cmd_pause_tube - The cumulative number of pause-tube commands
for this tube.
· pause_time_left - The number of seconds until the tube is un-
paused.
stats
· current_jobs_urgent - The number of ready jobs with priority <
1024.
· current_jobs_ready - The number of jobs in the ready queue.
· current_jobs_reserved - The number of jobs reserved by all
clients.
· current_jobs_delayed - The number of delayed jobs.
· current_jobs_buried - The number of buried jobs.
· cmd_put - The cumulative number of put commands.
· cmd_peek - The cumulative number of peek commands.
· cmd_peek_ready - The cumulative number of peek-ready commands.
· cmd_peek_delayed - The cumulative number of peek-delayed
commands.
· cmd_peek_buried - The cumulative number of peek-buried
commands.
· cmd_reserve - The cumulative number of reserve commands.
· cmd_use - The cumulative number of use commands.
· cmd_watch - The cumulative number of watch commands.
· cmd_ignore - The cumulative number of ignore commands.
· cmd_delete - The cumulative number of delete commands.
· cmd_release - The cumulative number of release commands.
· cmd_bury - The cumulative number of bury commands.
· cmd_kick - The cumulative number of kick commands.
· cmd_stats - The cumulative number of stats commands.
· cmd_stats_job - The cumulative number of stats-job commands.
· cmd_stats_tube - The cumulative number of stats-tube commands.
· cmd_list_tubes - The cumulative number of list-tubes commands.
· cmd_list_tube_used - The cumulative number of list-tube-used
commands.
· cmd_list_tubes_watched - The cumulative number of list-tubes-
watched commands.
· cmd_pause_tube - The cumulative number of pause-tube commands
· job_timeouts - The cumulative count of times a job has timed
out.
· total_jobs - The cumulative count of jobs created.
· max_job_size - The maximum number of bytes in a job.
· current_tubes - The number of currently-existing tubes.
· current_connections - The number of currently open connections.
· current_producers - The number of open connections that have
each issued at least one put command.
· current_workers - The number of open connections that have each
issued at least one reserve command.
· current_waiting - The number of open connections that have
issued a reserve command but not yet received a response.
· total_connections - The cumulative count of connections.
· pid - The process id of the server.
· version - The version string of the server.
· rusage_utime - The accumulated user CPU time of this process in
seconds and microseconds.
· rusage_stime - The accumulated system CPU time of this process
in seconds and microseconds.
· uptime - The number of seconds since this server started
running.
· binlog_oldest_index - The index of the oldest binlog file
needed to store the current jobs
· binlog_current_index - The index of the current binlog file
being written to. If binlog is not active this value will be 0
· binlog_max_size - The maximum size in bytes a binlog file is
allowed to get before a new binlog file is opened
list_tubes
Returns a list of tubes
list_tube_used
Returns the current tube being used. This is the tube which "put"
will place jobs.
list_tubes_watched
Returns a list of tubes being watched, or the number of tubes being
watched in a scalar context. These are the tubes that "reserve"
will check to find jobs. On error an empty list, or undef in a
scalar context, will be returned.
pause_tube ($tube, $delay)
Pause from reserving any jobs in $tube for $delay seconds.
Returns true on success and "undef" on error.
TODO
More tests
ACKNOWLEDGEMTS
Large parts of this documention were lifted from the documention that
comes with beanstalkd
SEE ALSO
http://xph.us/software/beanstalkd/
Beanstalk::Pool, Beanstalk::Job, Beanstalk::Stats
AUTHOR
Graham Barr <gbarr@pobox.com>
CREDITS
· Ask Bjorn Hansen
· Rhesa Rozendaal
COPYRIGHT
Copyright (C) 2008 by Graham Barr.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.14.1 2009-12-11 Beanstalk::Client(3)
