GEARMAN_RETURN_T(3)

NAME
gearman_return_t - Gearmand Documentation, http://gearman.info/

SYNOPSIS

#include <libgearman/gearman.h>

type 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:

type GEARMAN_SUCCESS
    Success

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

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

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

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

type GEARMAN_GETADDRINFO
    Name resolution failed for a host.

type GEARMAN_NO_SERVERS
    No servers have been provided for the client/worker.

type GEARMAN_LOST_CONNECTION
    Connection was lost to the given server.

type GEARMAN_MEMORY_ALLOCATION_FAILURE
    Memory allocation failed.

type GEARMAN_SERVER_ERROR
    An error occurred on the server.

type GEARMAN_NOT_CONNECTED
    Client/Worker is not currently connected to the server.

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

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

type GEARMAN_UNKNOWN_STATE
    The gearman_return_t was never set.

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

type GEARMAN_SEND_BUFFER_TOO_SMALL
    Send buffer was too small.

type GEARMAN_TIMEOUT
    A timeout occurred when making a request to the server.

type GEARMAN_ARGUMENT_TOO_LARGE
    Argument was too large for the current buffer.

type 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

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

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

type 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.

type 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

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

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

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

type GEARMAN_NO_REGISTERED_FUNCTIONS
    The worker has not registered any functions.

type 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.

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

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

type GEARMAN_WORK_STATUS
    Status has been updated by the worker via gearman_job_send_status()

type GEARMAN_WORK_EXCEPTION
    Worker has sent an exception the client via gearman_job_send_exception()

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

type GEARMAN_WORK_ERROR
    A task has had an error and will be retried.

type 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.

type GEARMAN_SUCCESS
    The function successfully completed the job.

type GEARMAN_FATAL

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

type GEARMAN_ERROR
    A task has had an error and will be retried.

type 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

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

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

type GEARMAN_UNKNOWN_OPTION
    Default state of task return value.

  PROTOCOL

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

type GEARMAN_INVALID_MAGIC

type GEARMAN_INVALID_COMMAND

type GEARMAN_INVALID_PACKET

type GEARMAN_UNEXPECTED_PACKET

type GEARMAN_TOO_MANY_ARGS

  DEPRECATED

type GEARMAN_IGNORE_PACKET

type GEARMAN_MAX_RETURN

SEE ALSO

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

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

COPYRIGHT
2011-2014, Data Differential, http://www.datadifferential.com/