summaryrefslogtreecommitdiffstats
path: root/vnfs/VES/code/evel_library/evel_other.c
blob: 945effb72ed05b2e28c0ec5cabd54038ddfc6528 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/**************************************************************************//**
 * @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();
}