aboutsummaryrefslogtreecommitdiff
path: root/src/im-asapo.c
blob: bd98a11ff10c1650bc200ed33f63176894d932d1 (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
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/*
 * im-asapo.c
 *
 * ASAP::O data interface
 *
 * Copyright © 2021 Deutsches Elektronen-Synchrotron DESY,
 *                  a research centre of the Helmholtz Association.
 *
 * Authors:
 *   2021 Thomas White <taw@physics.org>
 *
 * This file is part of CrystFEL.
 *
 * CrystFEL is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * CrystFEL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with CrystFEL.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <assert.h>
#include <unistd.h>
#include <asapo/consumer_c.h>

#include <image.h>
#include <utils.h>

#include "im-asapo.h"

#include "datatemplate_priv.h"


struct im_asapo
{
	char *stream;
	AsapoConsumerHandle consumer;
	AsapoStringHandle group_id;
};


static void show_asapo_error(const char *msg, const AsapoErrorHandle err)
{
	char buf[1024];
	asapo_error_explain(err, buf, sizeof(buf));
	ERROR("%s: %s\n", msg, buf);
}


char *im_asapo_make_unique_group_id(const char *endpoint,
                                    const char *token)
{
	AsapoConsumerHandle consumer;
	AsapoSourceCredentialsHandle cred;
	AsapoStringHandle group_id;
	AsapoErrorHandle err = asapo_new_handle();

	cred = asapo_create_source_credentials(kProcessed, "", "", "", token);
	consumer = asapo_create_consumer(endpoint, "", 0, cred, &err);
	asapo_free_handle(&cred);
	if ( asapo_is_error(err) ) {
		show_asapo_error("Cannot create temporary ASAP::O consumer", err);
		asapo_free_handle(&consumer);
		return NULL;
	}

	group_id = asapo_consumer_generate_new_group_id(consumer, &err);
	asapo_free_handle(&consumer);
	if ( asapo_is_error(err) ) {
		show_asapo_error("Cannot create ASAP::O group ID", err);
		return NULL;
	}

	return strdup(asapo_string_c_str(group_id));
}


struct im_asapo *im_asapo_connect(const char *endpoint,
                                  const char *token,
                                  const char *beamtime,
                                  const char *group_id,
                                  const char *data_source)
{
	struct im_asapo *a;
	AsapoSourceCredentialsHandle cred;
	AsapoErrorHandle err = asapo_new_handle();

	a = malloc(sizeof(struct im_asapo));
	if ( a == NULL ) return NULL;

	cred = asapo_create_source_credentials(kProcessed, beamtime, "",
	                                       data_source, token);
	a->consumer = asapo_create_consumer(endpoint, "auto", 0, cred, &err);
	asapo_free_handle(&cred);
	if ( asapo_is_error(err) ) {
		show_asapo_error("Cannot create ASAP::O consumer", err);
		free(a);
		return NULL;
	}

	asapo_consumer_set_timeout(a->consumer, 1000);

	a->group_id = asapo_string_from_c_str(group_id);
	a->stream = NULL;

	return a;
}


static int select_last_stream(struct im_asapo *a)
{
	AsapoStreamInfosHandle si;
	size_t n;
	int i;
	AsapoStreamInfoHandle st;
	AsapoErrorHandle err = asapo_new_handle();

	si = asapo_consumer_get_stream_list(a->consumer, "",
	                                    kAllStreams, &err);

	if ( asapo_is_error(err) ) {
		show_asapo_error("Couldn't get ASAP::O stream list", err);
		asapo_free_handle(&err);
		return 1;
	}

	STATUS("Streams available at start:\n");
	n = asapo_stream_infos_get_size(si);
	for ( i=0; i<n; i++ ) {
		AsapoStreamInfoHandle st = asapo_stream_infos_get_item(si, i);
		STATUS("Stream %i: %s\n", i, asapo_stream_info_get_name(st));
		asapo_free_handle(&st);
	}
	STATUS("End of stream list\n");

	st = asapo_stream_infos_get_item(si, n-1);
	a->stream = strdup(asapo_stream_info_get_name(st));
	asapo_free_handle(&st);
	STATUS("Starting with the last stream: %s\n", a->stream);

	asapo_free_handle(&si);
	asapo_free_handle(&err);
	return 0;
}


static int select_next_stream(struct im_asapo *a)
{
	AsapoStreamInfosHandle si;
	AsapoStreamInfoHandle st;
	AsapoErrorHandle err = asapo_new_handle();
	const char *next_stream;

	si = asapo_consumer_get_stream_list(a->consumer, a->stream,
	                                    kAllStreams, &err);

	if ( asapo_is_error(err) ) {
		show_asapo_error("Couldn't get ASAP::O stream list", err);
		asapo_free_handle(&si);
		asapo_free_handle(&err);
		return 1;
	}

	asapo_free_handle(&err);

	/* Stream list includes the current stream, so we need at least
	 * two entries */
	if ( asapo_stream_infos_get_size(si) < 2 ) {
		//STATUS("No newer stream.  Waiting for new data...\n");
		asapo_free_handle(&si);
		return 0;
	}

	/* Stream list includes the current stream, so look at the second one */
	st = asapo_stream_infos_get_item(si, 1);
	next_stream = asapo_stream_info_get_name(st);
	free(a->stream);
	a->stream = strdup(next_stream);
	STATUS("Selecting next stream: %s\n", a->stream);
	asapo_free_handle(&st);
	asapo_free_handle(&si);

	return 0;
}


static void skip_to_stream_end(struct im_asapo *a)
{
	int64_t size;
	AsapoErrorHandle err = asapo_new_handle();

	size = asapo_consumer_get_current_size(a->consumer, a->stream, &err);
	if ( asapo_is_error(err) ) {
		show_asapo_error("Failed to get length of stream", err);
	} else {

		AsapoErrorHandle err = asapo_new_handle();

		asapo_consumer_set_last_read_marker(a->consumer,
		                                    a->group_id, size,
		                                    a->stream, &err);
		if ( asapo_is_error(err) ) {
			show_asapo_error("Failed to skip to end of stream", err);
		} else {
			STATUS("Skipped to end of stream (%lli)\n", size);
		}

		asapo_free_handle(&err);
	}

	asapo_free_handle(&err);
}


void *im_asapo_fetch(struct im_asapo *a, size_t *pdata_size,
                     char **pfilename, char **pevent)
{
	void *data_copy;
	AsapoMessageMetaHandle meta;
	AsapoMessageDataHandle data;
	AsapoErrorHandle err;
	uint64_t msg_size;

	if ( a->stream == NULL ) {
		if ( select_last_stream(a) ) {
			return NULL;
		}
		skip_to_stream_end(a);
	}

	err = asapo_new_handle();
	meta = asapo_new_handle();
	data = asapo_new_handle();

	asapo_consumer_get_next(a->consumer, a->group_id, &meta, &data,
	                        a->stream, &err);
	if ( asapo_error_get_type(err) == kEndOfStream ) {
		select_next_stream(a);
		asapo_free_handle(&err);
		asapo_free_handle(&meta);
		asapo_free_handle(&data);
		return NULL;  /* Sandbox will call try again very soon */
	}

	if ( asapo_is_error(err) ) {
		show_asapo_error("Couldn't get next ASAP::O record", err);
		asapo_free_handle(&err);
		asapo_free_handle(&meta);
		asapo_free_handle(&data);
		return NULL;
	}

	msg_size = asapo_message_meta_get_size(meta);

	data_copy = malloc(msg_size);
	if ( data_copy == NULL ) {
		ERROR("Failed to copy data block.\n");
		asapo_free_handle(&err);
		asapo_free_handle(&meta);
		asapo_free_handle(&data);
		return NULL;
	}
	memcpy(data_copy, asapo_message_data_get_as_chars(data), msg_size);

	*pfilename = strdup(asapo_message_meta_get_name(meta));
	*pevent = strdup("//");

	asapo_free_handle(&err);
	asapo_free_handle(&meta);
	asapo_free_handle(&data);

	*pdata_size = msg_size;
	return data_copy;
}


void im_asapo_shutdown(struct im_asapo *a)
{
	if ( a == NULL ) return;
	asapo_free_handle(&a->consumer);
	asapo_free_handle(&a->group_id);
	free(a);
}