gearman_strerror man page

gearman_strerror — Gearmand Documentation, http://gearman.info/

Synopsis

#include <libgearman/gearman.h>

gearman_return_t
const char *gearman_strerror(gearman_return_t rc)
bool gearman_success(gearman_return_t rc)
bool gearman_failed(gearman_return_t rc)
bool gearman_continue(gearman_return_t rc)

Compile and link with -lgearman

Description

gearman_return_t is used as a return/error type for all calls using gearman_client_st and gearman_worker_st. GEARMAN_SUCCESS is returned upon success, otherwise an error is returned. gearman_failed() can be used to see if the return value is a failing value. You can print a text version of the error message with gearman_strerror().

gearman_success() return true if GEARMAN_SUCCESS or if GEARMAN_NO_PENDING_TASKS tests true.

gearman_failed() return true if any value other then GEARMAN_SUCCESS was provided.

gearman_continue() returns true if any error related to non-blocking IO occurred. This should be used for testing loops.

Possible values of gearman_return_t

GEARMAN_SUCCESS

Success

GEARMAN_NO_PENDING_TASKS

gearman_client_run_tasks() was called and it has completed all tasks assigned to the client.

GEARMAN_IO_WAIT

Blocking IO was found. gearman_continue() can be used to test for this.

GEARMAN_ERRNO

System error occurred. Use either gearman_client_errno() or gearman_worker_errno()

GEARMAN_NO_ACTIVE_FDS

No active connections were available.  gearman_continue() can be used to test for this.

GEARMAN_GETADDRINFO

Name resolution failed for a host.

GEARMAN_NO_SERVERS

No servers have been provided for the client/worker.

GEARMAN_LOST_CONNECTION

Connection was lost to the given server.

GEARMAN_MEMORY_ALLOCATION_FAILURE

Memory allocation failed.

GEARMAN_SERVER_ERROR

An error occurred on the server.

GEARMAN_NOT_CONNECTED

Client/Worker is not currently connected to the server.

GEARMAN_COULD_NOT_CONNECT

Server name was valid, but a connection could not be made.

GEARMAN_ECHO_DATA_CORRUPTION

Either gearman_client_echo() or gearman_worker_echo() echo was unsuccessful because the data was returned from gearmand corrupted.

GEARMAN_UNKNOWN_STATE

The gearman_return_t was never set.

GEARMAN_FLUSH_DATA

Internal state, should never be seen by either client or worker.

GEARMAN_SEND_BUFFER_TOO_SMALL

Send buffer was too small.

GEARMAN_TIMEOUT

A timeout occurred when making a request to the server.

GEARMAN_ARGUMENT_TOO_LARGE

Argument was too large for the current buffer.

GEARMAN_INVALID_ARGUMENT

One of the arguments to the given API call was invalid. EINVAL will be set if gearman_client_error() or gearman_worker_error() were not settable. This can also be returned if GEARMAN_CLIENT_UNBUFFERED_RESULT was set, but the client is not handling the data correctly.

Client Only

GEARMAN_NEED_WORKLOAD_FN

A client was asked for work, but no gearman_workload_fn callback was specified. See gearman_client_set_workload_fn()

GEARMAN_WORK_FAIL

A task has failed, and the worker has exited with an error or it called gearman_job_send_fail()

GEARMAN_IN_PROGRESS

gearman_client_job_status() has been called for a gearman_job_handle_t and the Job is currently being run by a worker.

GEARMAN_JOB_EXISTS

gearman_client_job_status() has been called for a gearman_job_handle_t and the Job is currently known by a server, but is not being run by a worker.

Worker Only

GEARMAN_INVALID_FUNCTION_NAME

A worker was sent a request for a job that it did not have a valid function for.

GEARMAN_INVALID_WORKER_FUNCTION

No callback was provided by the worker for a given function.

GEARMAN_NO_REGISTERED_FUNCTION

A request for removing a given function from a worker was invalid since that function did not exist.

GEARMAN_NO_REGISTERED_FUNCTIONS

The worker has not registered any functions.

GEARMAN_NO_JOBS

No jobs were found for the worker. This error code is only returned if the worker has just made a request for jobs.

Worker to Client

Client which have registed a custom gearman_actions_t may use these value as return values to the calling client.

GEARMAN_WORK_DATA

Worker has sent a chunked piece of data to the client via gearman_job_send_data()

GEARMAN_WORK_WARNING

Worker has issued a warning to the client via gearman_job_send_warning()

GEARMAN_WORK_STATUS

Status has been updated by the worker via gearman_job_send_status()

GEARMAN_WORK_EXCEPTION

Worker has sent an exception the client via gearman_job_send_exception()

GEARMAN_WORK_FAIL

A task has failed, and the worker has exited with an error or it called gearman_job_send_fail()

GEARMAN_WORK_ERROR

A task has had an error and will be retried.

GEARMAN_PAUSE

Used only in custom application for client return based on GEARMAN_WORK_DATA, GEARMAN_WORK_WARNING, GEARMAN_WORK_EXCEPTION, GEARMAN_WORK_FAIL, or GEARMAN_WORK_STATUS. gearman_continue() can be used to check for this value.

Worker to Client

Any function defined by gearman_worker_define_function() may, and can only, return the following gearman_return_t values.

GEARMAN_SUCCESS

The function successfully completed the job.

GEARMAN_FATAL

GEARMAN_FAIL

The function failed to complete the job. GEARMAN_FATAL is the deprecated name for GEARMAN_FAIL

GEARMAN_ERROR

A task has had an error and will be retried.

GEARMAN_SHUTDOWN

GEARMAN_SHUTDOWN is a special case. If it is returned the client will be sent GEARMAN_SUCCESS, but gearman_worker_work() will exit with GEARMAN_SHUTDOWN.

Task Only

GEARMAN_NOT_FLUSHING

gearman_task_send_workload() failed, it was not in the correct state.

GEARMAN_DATA_TOO_LARGE

gearman_task_send_workload() failed, the data was too large to be sent.

GEARMAN_UNKNOWN_OPTION

Default state of task return value.

Protocol

If any of these errors occurred the connection will be dropped/reset.

GEARMAN_INVALID_MAGIC
GEARMAN_INVALID_COMMAND
GEARMAN_INVALID_PACKET
GEARMAN_UNEXPECTED_PACKET
GEARMAN_TOO_MANY_ARGS

Deprecated

GEARMAN_IGNORE_PACKET
GEARMAN_MAX_RETURN

See Also

gearmand(8) libgearman(3) gearman_client_error() or gearman_worker_error()

Author

Data Differential http://www.datadifferential.com/

Referenced By

gearman_client_clone(3), gearman_client_create(3), gearman_client_do(3), gearman_client_do_background(3), gearman_client_do_high(3), gearman_client_do_high_background(3), gearman_client_do_low(3), gearman_client_do_low_background(3), gearman_client_free(3), gearman_worker_clone(3), gearman_worker_create(3), gearman_worker_define_function(3), gearman_worker_free(3).

November 16, 2016 1.1.14 Gearmand