/usr/include/libgearman-1.0/client.h is in libgearman-dev 1.0.6-3.
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*
* Gearmand client and server library.
*
* Copyright (C) 2011 Data Differential, http://datadifferential.com/
* Copyright (C) 2008 Brian Aker, Eric Day
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @file
* @brief Client Declarations
*/
#pragma once
/** @addtogroup gearman_client Client Declarations
*
* This is the interface gearman clients should use. You can run tasks one at a
* time or concurrently.
*
* @ref main_page_client "See Main Page for full details."
* @{
*/
enum gearman_client_t {
GEARMAN_CLIENT_STATE_IDLE,
GEARMAN_CLIENT_STATE_NEW,
GEARMAN_CLIENT_STATE_SUBMIT,
GEARMAN_CLIENT_STATE_PACKET
};
/**
* @ingroup gearman_client
*/
struct gearman_client_st
{
struct {
bool allocated;
bool non_blocking;
bool unbuffered_result;
bool no_new;
bool free_tasks;
bool generate_unique;
} options;
enum gearman_client_t state;
uint32_t new_tasks;
uint32_t running_tasks;
uint32_t task_count;
void *context;
gearman_connection_st *con;
gearman_task_st *task;
gearman_task_st *task_list;
gearman_task_context_free_fn *task_context_free_fn;
struct gearman_universal_st universal;
struct gearman_actions_t actions;
gearman_job_handle_t _do_handle; // Backwards compatible
};
#ifdef __cplusplus
extern "C" {
#endif
/**
* Initialize a client structure. Always check the return value even if passing
* in a pre-allocated structure. Some other initialization may have failed. It
* is not required to memset() a structure before providing it.
*
* @param[in] client Caller allocated structure, or NULL to allocate one.
* @return On success, a pointer to the (possibly allocated) structure. On
* failure this will be NULL.
*/
GEARMAN_API
gearman_client_st *gearman_client_create(gearman_client_st *client);
/**
* Clone a client structure.
*
* @param[in] client Caller allocated structure, or NULL to allocate one.
* @param[in] from Structure to use as a source to clone from.
* @return Same return as gearman_client_create().
*/
GEARMAN_API
gearman_client_st *gearman_client_clone(gearman_client_st *client,
const gearman_client_st *from);
/**
* Free resources used by a client structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
*/
GEARMAN_API
void gearman_client_free(gearman_client_st *client);
/**
* See gearman_error() for details.
*/
GEARMAN_API
const char *gearman_client_error(const gearman_client_st *client);
GEARMAN_API
gearman_return_t gearman_client_error_code(const gearman_client_st *client);
/**
* See gearman_errno() for details.
*/
GEARMAN_API
int gearman_client_errno(const gearman_client_st *client);
/**
* Get options for a client structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @return Options set for the client structure.
*/
GEARMAN_API
gearman_client_options_t gearman_client_options(const gearman_client_st *client);
/**
* Set options for a client structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] options Available options for client structures.
*/
GEARMAN_API
void gearman_client_set_options(gearman_client_st *client,
gearman_client_options_t options);
/**
* Add options for a client structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] options Available options for client structures.
*/
GEARMAN_API
void gearman_client_add_options(gearman_client_st *client,
gearman_client_options_t options);
GEARMAN_API
bool gearman_client_has_option(gearman_client_st *client,
gearman_client_options_t option);
/**
* Remove options for a client structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] options Available options for client structures.
*/
GEARMAN_API
void gearman_client_remove_options(gearman_client_st *client,
gearman_client_options_t options);
/**
* See gearman_universal_timeout() for details.
*/
GEARMAN_API
int gearman_client_timeout(gearman_client_st *client);
/**
* See gearman_universal_set_timeout() for details.
*/
GEARMAN_API
void gearman_client_set_timeout(gearman_client_st *client, int timeout);
/**
* Get the application context for a client.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @return Application context that was previously set, or NULL.
*/
GEARMAN_API
void *gearman_client_context(const gearman_client_st *client);
/**
* Set the application context for a client.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] context Application context to set.
*/
GEARMAN_API
void gearman_client_set_context(gearman_client_st *client, void *context);
/**
* See gearman_set_log_fn() for details.
*/
GEARMAN_API
void gearman_client_set_log_fn(gearman_client_st *client,
gearman_log_fn *function, void *context,
gearman_verbose_t verbose);
/**
* See gearman_set_workload_malloc_fn() for details.
*/
GEARMAN_API
void gearman_client_set_workload_malloc_fn(gearman_client_st *client,
gearman_malloc_fn *function,
void *context);
/**
* See gearman_set_workload_malloc_fn() for details.
*/
GEARMAN_API
void gearman_client_set_workload_free_fn(gearman_client_st *client,
gearman_free_fn *function,
void *context);
GEARMAN_API
gearman_return_t gearman_client_set_memory_allocators(gearman_client_st *,
gearman_malloc_fn *malloc_fn,
gearman_free_fn *free_fn,
gearman_realloc_fn *realloc_fn,
gearman_calloc_fn *calloc_fn,
void *context);
/**
* Add a job server to a client. This goes into a list of servers that can be
* used to run tasks. No socket I/O happens here, it is just added to a list.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] host Hostname or IP address (IPv4 or IPv6) of the server to add.
* @param[in] port Port of the server to add.
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_add_server(gearman_client_st *client,
const char *host, in_port_t port);
/**
* Add a list of job servers to a client. The format for the server list is:
* SERVER[:PORT][,SERVER[:PORT]]...
* Some examples are:
* 10.0.0.1,10.0.0.2,10.0.0.3
* localhost234,jobserver2.domain.com:7003,10.0.0.3
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] servers Server list described above.
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_add_servers(gearman_client_st *client,
const char *servers);
/**
* Remove all servers currently associated with the client.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
*/
GEARMAN_API
void gearman_client_remove_servers(gearman_client_st *client);
/**
* When in non-blocking I/O mode, wait for activity from one of the servers.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_wait(gearman_client_st *client);
/** @} */
/**
* @addtogroup gearman_client_single Single Task Interface
* @ingroup gearman_client
* Use the following set of functions to run one task at a time.
*
* @ref main_page_client_single "See Main Page for full details."
* @{
*/
/**
* Run a single task and return an allocated result.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function_name The name of the function to run.
* @param[in] unique Optional unique job identifier, or NULL for a new UUID.
* @param[in] workload The workload to pass to the function when it is run.
* @param[in] workload_size Size of the workload.
* @param[out] result_size The size of the data being returned.
* @param[out] ret_ptr Standard gearman return value. In the case of
* GEARMAN_WORK_DATA, GEARMAN_WORK_WARNING, or GEARMAN_WORK_STATUS, the caller
* should take any actions to handle the event and then call this function
* again. This may happen multiple times until a GEARMAN_WORK_ERROR,
* GEARMAN_WORK_FAIL, or GEARMAN_SUCCESS (work complete) is returned. For
* GEARMAN_WORK_DATA or GEARMAN_WORK_WARNING, the result_size will be set to
* the intermediate data chunk being returned and an allocated data buffer
* will be returned. For GEARMAN_WORK_STATUS, the caller can use
* gearman_client_do_status() to get the current tasks status.
* @return The result allocated by the library, this needs to be freed when the
* caller is done using it.
*/
GEARMAN_API
void *gearman_client_do(gearman_client_st *client,
const char *function_name,
const char *unique,
const void *workload, size_t workload_size,
size_t *result_size,
gearman_return_t *ret_ptr);
/**
* Run a high priority task and return an allocated result. See
* gearman_client_do() for parameter and return information.
*/
GEARMAN_API
void *gearman_client_do_high(gearman_client_st *client,
const char *function_name, const char *unique,
const void *workload, size_t workload_size,
size_t *result_size, gearman_return_t *ret_ptr);
/**
* Run a low priority task and return an allocated result. See
* gearman_client_do() for parameter and return information.
*/
GEARMAN_API
void *gearman_client_do_low(gearman_client_st *client,
const char *function_name, const char *unique,
const void *workload, size_t workload_size,
size_t *result_size, gearman_return_t *ret_ptr);
/**
* Get the job handle for the running task. This should be used between
* repeated gearman_client_do() (and related) calls to get information.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @return Pointer to static buffer in the client structure that holds the job
* handle.
*/
GEARMAN_API
const char *gearman_client_do_job_handle(gearman_client_st *client);
// Deprecatd
GEARMAN_API
void gearman_client_do_status(gearman_client_st *client, uint32_t *numerator,
uint32_t *denominator);
/**
* Run a task in the background.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function_name The name of the function to run.
* @param[in] unique Optional unique job identifier, or NULL for a new UUID.
* @param[in] workload The workload to pass to the function when it is run.
* @param[in] workload_size Size of the workload.
* @param[out] job_handle A buffer to store the job handle in. Must be at least
GEARMAN_JOB_HANDLE_SIZE bytes long.
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_do_background(gearman_client_st *client,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_job_handle_t job_handle);
/**
* Run a high priority task in the background. See
* gearman_client_do_background() for parameter and return information.
*/
GEARMAN_API
gearman_return_t gearman_client_do_high_background(gearman_client_st *client,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_job_handle_t job_handle);
/**
* Run a low priority task in the background. See
* gearman_client_do_background() for parameter and return information.
*/
GEARMAN_API
gearman_return_t gearman_client_do_low_background(gearman_client_st *client,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_job_handle_t job_handle);
/**
* Get the status for a backgound job.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] job_handle The job handle to get status for.
* @param[out] is_known Optional parameter to store the known status in.
* @param[out] is_running Optional parameter to store the running status in.
* @param[out] numerator Optional parameter to store the numerator in.
* @param[out] denominator Optional parameter to store the denominator in.
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_job_status(gearman_client_st *client,
const gearman_job_handle_t job_handle,
bool *is_known, bool *is_running,
uint32_t *numerator,
uint32_t *denominator);
GEARMAN_API
gearman_status_t gearman_client_unique_status(gearman_client_st *client,
const char *unique, size_t unique_length);
// This is not in the API yet, subject to change
GEARMAN_API
gearman_task_st *gearman_client_add_task_status_by_unique(gearman_client_st *client,
gearman_task_st *task_ptr,
const char *unique_handle,
gearman_return_t *ret_ptr);
/**
* Send data to all job servers to see if they echo it back. This is a test
* function to see if the job servers are responding properly.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] workload The workload to ask the server to echo back.
* @param[in] workload_size Size of the workload.
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_echo(gearman_client_st *client,
const void *workload,
size_t workload_size);
/** @} */
/**
* @addtogroup gearman_client_concurrent Concurrent Task Interface
* @ingroup gearman_client
* Use the following set of functions to multiple run tasks concurrently.
*
* @ref main_page_client_concurrent "See Main Page for full details."
* @{
*/
/**
* Free all tasks for a gearman structure.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
*/
GEARMAN_API
void gearman_client_task_free_all(gearman_client_st *client);
/**
* Set function to call when tasks are being cleaned up so applications can
* clean up the task context.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call to clean up task context.
*/
GEARMAN_API
void gearman_client_set_task_context_free_fn(gearman_client_st *client,
gearman_task_context_free_fn *function);
/**
* Add a task to be run in parallel.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] task Caller allocated structure, or NULL to allocate one.
* @param[in] context Application context to associate with the task.
* @param[in] function_name The name of the function to run.
* @param[in] unique Optional unique job identifier, or NULL for a new UUID.
* @param[in] workload The workload to pass to the function when it is run.
* @param[in] workload_size Size of the workload.
* @param[out] ret_ptr Standard gearman return value.
* @return On success, a pointer to the (possibly allocated) structure. On
* failure this will be NULL.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add a high priority task to be run in parallel. See
* gearman_client_add_task() for details.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_high(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add a low priority task to be run in parallel. See
* gearman_client_add_task() for details.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_low(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add a background task to be run in parallel. See
* gearman_client_add_task() for details.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_background(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add a high priority background task to be run in parallel. See
* gearman_client_add_task() for details.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_high_background(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add a low priority background task to be run in parallel. See
* gearman_client_add_task() for details.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_low_background(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *function_name,
const char *unique,
const void *workload,
size_t workload_size,
gearman_return_t *ret_ptr);
/**
* Add task to get the status for a backgound task in parallel.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] task Caller allocated structure, or NULL to allocate one.
* @param[in] context Application context to associate with the task.
* @param[in] job_handle The job handle to get status for.
* @param[out] ret_ptr Standard gearman return value.
* @return On success, a pointer to the (possibly allocated) structure. On
* failure this will be NULL.
*/
GEARMAN_API
gearman_task_st *gearman_client_add_task_status(gearman_client_st *client,
gearman_task_st *task,
void *context,
const char *job_handle,
gearman_return_t *ret_ptr);
/**
* Callback function when workload data needs to be sent for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_workload_fn(gearman_client_st *client,
gearman_workload_fn *function);
/**
* Callback function when a job has been created for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_created_fn(gearman_client_st *client,
gearman_created_fn *function);
/**
* Callback function when there is a data packet for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_data_fn(gearman_client_st *client,
gearman_data_fn *function);
/**
* Callback function when there is a warning packet for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_warning_fn(gearman_client_st *client,
gearman_warning_fn *function);
/**
* Callback function when there is a status packet for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_status_fn(gearman_client_st *client,
gearman_universal_status_fn *function);
/**
* Callback function when a task is complete.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_complete_fn(gearman_client_st *client,
gearman_complete_fn *function);
/**
* Callback function when there is an exception packet for a task.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_exception_fn(gearman_client_st *client,
gearman_exception_fn *function);
/**
* Callback function when a task has failed.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @param[in] function Function to call.
*/
GEARMAN_API
void gearman_client_set_fail_fn(gearman_client_st *client,
gearman_fail_fn *function);
/**
* Clear all task callback functions.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
*/
GEARMAN_API
void gearman_client_clear_fn(gearman_client_st *client);
/**
* Run tasks that have been added in parallel.
*
* @param[in] client Structure previously initialized with
* gearman_client_create() or gearman_client_clone().
* @return Standard gearman return value.
*/
GEARMAN_API
gearman_return_t gearman_client_run_tasks(gearman_client_st *client);
GEARMAN_API
bool gearman_client_compare(const gearman_client_st *first, const gearman_client_st *second);
GEARMAN_API
bool gearman_client_set_server_option(gearman_client_st *self, const char *option_arg, size_t option_arg_size);
GEARMAN_API
void gearman_client_set_namespace(gearman_client_st *self, const char *namespace_key, size_t namespace_key_size);
GEARMAN_API
gearman_return_t gearman_client_set_identifier(gearman_client_st *client,
const char *id, size_t id_size);
const char *gearman_client_namespace(gearman_client_st *self);
/** @} */
#ifdef __cplusplus
}
#endif
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