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/**************************************************************************//**
* @file
* Implementation of EVEL functions relating to Other.
*
* License
* -------
*
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*****************************************************************************/
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "evel.h"
#include "evel_internal.h"
/**************************************************************************//**
* Create a new Other event.
*
* @note The mandatory fields on the Other must be supplied to this factory
* function and are immutable once set. Optional fields have explicit
* setter functions, but again values may only be set once so that the
* Other has immutable properties.
* @returns pointer to the newly manufactured ::EVENT_OTHER. If the event is
* not used (i.e. posted) it must be released using ::evel_free_other.
* @retval NULL Failed to create the event.
*****************************************************************************/
EVENT_OTHER * evel_new_other()
{
EVENT_OTHER * other = NULL;
EVEL_ENTER();
/***************************************************************************/
/* Check preconditions. */
/***************************************************************************/
/***************************************************************************/
/* Allocate the Other. */
/***************************************************************************/
other = malloc(sizeof(EVENT_OTHER));
if (other == NULL)
{
log_error_state("Out of memory");
goto exit_label;
}
memset(other, 0, sizeof(EVENT_OTHER));
EVEL_DEBUG("New Other is at %lp", other);
/***************************************************************************/
/* Initialize the header & the Other fields. Optional string values are */
/* uninitialized (NULL). */
/***************************************************************************/
evel_init_header(&other->header);
other->header.event_domain = EVEL_DOMAIN_OTHER;
dlist_initialize(&other->other_fields);
exit_label:
EVEL_EXIT();
return other;
}
/**************************************************************************//**
* Set the Event Type property of the Other.
*
* @note The property is treated as immutable: it is only valid to call
* the setter once. However, we don't assert if the caller tries to
* overwrite, just ignoring the update instead.
*
* @param other Pointer to the Other.
* @param type The Event Type to be set. ASCIIZ string. The caller
* does not need to preserve the value once the function
* returns.
*****************************************************************************/
void evel_other_type_set(EVENT_OTHER * other,
const char * const type)
{
EVEL_ENTER();
/***************************************************************************/
/* Check preconditions and call evel_header_type_set. */
/***************************************************************************/
assert(other != NULL);
assert(other->header.event_domain == EVEL_DOMAIN_OTHER);
evel_header_type_set(&other->header, type);
EVEL_EXIT();
}
/**************************************************************************//**
* Add a field name/value pair to the Other.
*
* The name and value are null delimited ASCII strings. The library takes
* a copy so the caller does not have to preserve values after the function
* returns.
*
* @param other Pointer to the Other.
* @param name ASCIIZ string with the field's name. The caller does not
* need to preserve the value once the function returns.
* @param value ASCIIZ string with the field's value. The caller does not
* need to preserve the value once the function returns.
*****************************************************************************/
void evel_other_field_add(EVENT_OTHER * other, char * name, char * value)
{
OTHER_FIELD * other_field = NULL;
EVEL_ENTER();
/***************************************************************************/
/* Check preconditions. */
/***************************************************************************/
assert(other != NULL);
assert(other->header.event_domain == EVEL_DOMAIN_OTHER);
assert(name != NULL);
assert(value != NULL);
EVEL_DEBUG("Adding name=%s value=%s", name, value);
other_field = malloc(sizeof(OTHER_FIELD));
assert(other_field != NULL);
memset(other_field, 0, sizeof(OTHER_FIELD));
other_field->name = strdup(name);
other_field->value = strdup(value);
assert(other_field->name != NULL);
assert(other_field->value != NULL);
dlist_push_last(&other->other_fields, other_field);
EVEL_EXIT();
}
/**************************************************************************//**
* Encode the Other in JSON according to AT&T's schema for the event type.
*
* @param jbuf Pointer to the ::EVEL_JSON_BUFFER to encode into.
* @param event Pointer to the ::EVENT_HEADER to encode.
*****************************************************************************/
void evel_json_encode_other(EVEL_JSON_BUFFER * jbuf,
EVENT_OTHER * event)
{
OTHER_FIELD * other_field = NULL;
DLIST_ITEM * other_field_item = NULL;
EVEL_ENTER();
/***************************************************************************/
/* Check preconditions. */
/***************************************************************************/
assert(event != NULL);
assert(event->header.event_domain == EVEL_DOMAIN_OTHER);
evel_json_encode_header(jbuf, &event->header);
evel_json_open_named_list(jbuf, "otherFields");
other_field_item = dlist_get_first(&event->other_fields);
while (other_field_item != NULL)
{
other_field = (OTHER_FIELD *) other_field_item->item;
assert(other_field != NULL);
evel_json_open_object(jbuf);
evel_enc_kv_string(jbuf, "name", other_field->name);
evel_enc_kv_string(jbuf, "value", other_field->value);
evel_json_close_object(jbuf);
other_field_item = dlist_get_next(other_field_item);
}
evel_json_close_list(jbuf);
EVEL_EXIT();
}
/**************************************************************************//**
* Free an Other.
*
* Free off the Other supplied. Will free all the contained allocated memory.
*
* @note It does not free the Other itself, since that may be part of a
* larger structure.
*****************************************************************************/
void evel_free_other(EVENT_OTHER * event)
{
OTHER_FIELD * other_field = NULL;
EVEL_ENTER();
/***************************************************************************/
/* Check preconditions. As an internal API we don't allow freeing NULL */
/* events as we do on the public API. */
/***************************************************************************/
assert(event != NULL);
assert(event->header.event_domain == EVEL_DOMAIN_OTHER);
/***************************************************************************/
/* Free all internal strings then the header itself. */
/***************************************************************************/
other_field = dlist_pop_last(&event->other_fields);
while (other_field != NULL)
{
EVEL_DEBUG("Freeing Other Field (%s, %s)",
other_field->name,
other_field->value);
free(other_field->name);
free(other_field->value);
free(other_field);
other_field = dlist_pop_last(&event->other_fields);
}
evel_free_header(&event->header);
EVEL_EXIT();
}
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