1Gearman::Client(3) User Contributed Perl Documentation Gearman::Client(3)
2
6 Gearman::Client - Client for gearman distributed job system
7
9 use Gearman::Client;
10 my $client = Gearman::Client->new;
11 $client->job_servers(
12 '127.0.0.1',
13 {
14 host => '10.0.0.1',
15 port => 4730,
16 socket_cb => sub {...},
17 use_ssl => 1,
18 ca_file => ...,
19 cert_file => ...,
20 key_file => ...,
21 }
22 );
23 # running a single task
25 my $result_ref = $client->do_task("add", "1+2", {
26 on_fail => sub {...},
27 on_complete => sub {...}
28 });
29 print "1 + 2 = $$result_ref\n";
30 # waiting on a set of tasks in parallel
32 my $taskset = $client->new_task_set;
33 $taskset->add_task( "add" => "1+2", {
34 on_complete => sub { ... }
35 });
36 $taskset->add_task( "divide" => "5/0", {
37 on_fail => sub { print "divide by zero error!\n"; },
38 });
39 $taskset->wait;
40
42 Gearman::Client is a client class for the Gearman distributed job
43 system, providing a framework for sending jobs to one or more Gearman
44 servers. These jobs are then distributed out to a farm of workers.
45 Callers instantiate a Gearman::Client object and from it dispatch
47 single tasks, sets of tasks, or check on the status of tasks.
48 Gearman::Client is derived from Gearman::Objects
50
52 Gearman::Client->new(%options)
53 Creates a new Gearman::Client object, and returns the object.
54 If %options is provided, initializes the new client object with the
56 settings in %options, which can contain:
57 · exceptions
59 If true, the client sends an OPTION_REQ exceptions
61 <http://gearman.org/protocol/> request for each connection to the
62 job server. This causes job server to forward WORK_EXCEPTION
63 packets to the client.
64 · job_servers
66 List of job servers. Value should be an array reference, hash
68 reference or scalar.
69 Calls Gearman::Objects to set job_servers
71 · prefix
73 Calls prefix (see Gearman::Objects) to set the prefix / namespace.
75 · command_timeout
77 Maximum time a gearman command should take to get a result (not a
79 job timeout)
80 default: 30 seconds
82 · backoff_max
84 Max number of failed connection attempts before an job server will
86 be temporary disabled
87 default: 90
89
91 Summation
92 This is an example client that sends off a request to sum up a list of
93 integers.
94 use Gearman::Client;
96 use Storable qw( freeze );
97 my $client = Gearman::Client->new;
98 $client->job_servers('127.0.0.1');
99 my $tasks = $client->new_task_set;
100 my $handle = $tasks->add_task(sum => freeze([ 3, 5 ]), {
101 on_complete => sub { print ${ $_[0] }, "\n" }
102 });
103 $tasks->wait;
104 See the Gearman::Worker documentation for the worker for the sum
106 function.
107
109 If you intend using UTF-8 data with SSL based connection, beware there
110 is no UTF-8 support in underlying Net::SSLeay.
111 "Forcing-Unicode-in-Perl-(Or-Unforcing-Unicode-in-Perl)" in perlunicode
112 describes proper workarounds.
113
115 new_task_set()
116 Creates and returns a new Gearman::Taskset object.
117 get_job_server_status()
119 return "{job_server => {job => {capable, queued, running}}}"
120 get_job_server_jobs()
122 supported only by Gearman::Server
123 return "{job-server => {job => {address, listeners, key}}}"
125 get_job_server_clients()
127 supported only by Gearman::Server
128 do_task($task)
130 do_task($funcname, $arg, \%options)
131 Dispatches a task and waits on the results. May either provide a
132 Gearman::Task object, or the 3 arguments that the Gearman::Task
133 constructor takes.
134 return scalarref of WORK_COMPLETE result, or undef on failure.
136 dispatch_background($func, $arg_p, $options_hr)
138 dispatch_background($task)
139 Dispatches a "task" and doesn't wait for the result. Return value is an
140 opaque scalar that can be used to refer to the task with get_status.
141 It is strongly recommended to set Gearman::Task "uniq" option to insure
143 gearmand does not squash jobs if it store background jobs in a
144 persistence backend. See the issue #87
145 <https://github.com/gearman/gearmand/issues/87#issuecomment-291119785>
146 return the handle from the jobserver, or undef on failure
148 run_hook($name)
150 run a hook callback if defined
151 add_hook($name, $cb)
153 add a hook
154 get_status($handle)
156 The Gearman Server will assign a scalar job handle when you request a
157 background job with dispatch_background. Save this scalar, and use it
158 later in order to request the status of this job.
159 return Gearman::JobStatus on success
161
163 Copyright 2006-2007 Six Apart, Ltd.
164 License granted to use/distribute under the same terms as Perl itself.
166
168 This is free software. This comes with no warranty whatsoever.
169
171 Brad Fitzpatrick (<brad at danga dot com>)
172 Jonathan Steinert (<hachi at cpan dot org>)
173 Alexei Pastuchov (<palik at cpan dot org>) co-maintainer
174
176 <https://github.com/p-alik/perl-Gearman.git>
177perl v5.28.1 2018-08-24 Gearman::Client(3)