Annotation of parser3/src/classes/amqp.C, revision 1.28
1.1 moko 1: /** @file
2: Parser: @b amqp parser class.
3:
1.13 moko 4: Copyright (c) 2001-2026 Art. Lebedev Studio (https://www.artlebedev.com)
1.1 moko 5: Authors: Konstantin Morshnev <moko@design.ru>
6: */
7:
1.25 moko 8:
9: #include "classes.h"
1.1 moko 10: #include "pa_vmethod_frame.h"
11:
1.25 moko 12: #include "pa_vamqp.h"
1.1 moko 13: #include "pa_request.h"
1.8 moko 14: #include "pa_varray.h"
1.1 moko 15: #include "pa_vbool.h"
1.16 moko 16: #include "pa_os.h"
1.1 moko 17:
1.28 ! moko 18: volatile const char * IDENT_AMQP_C="$Id: amqp.C,v 1.27 2026/10/09 18:32:15 moko Exp $" IDENT_PA_VAMQP_H;
1.1 moko 19:
20: class MAmqp: public Methoded {
21: public: // VStateless_class
1.28 ! moko 22: Value* create_new_value(Pool& apool) { return new VAmqp(apool); }
1.1 moko 23: public:
24: MAmqp();
25: };
26:
27: DECLARE_CLASS_VAR(amqp, new MAmqp);
28:
1.6 moko 29: #ifdef WITH_AMQP
30:
1.16 moko 31: static void status_check(VAmqp& self, int ret, const char *detail=""){
1.6 moko 32: if(ret == AMQP_STATUS_OK)
33: return;
34:
1.16 moko 35: self.fstate = VAmqp::CONNECTION_DEAD;
36:
1.6 moko 37: const char* error_str = amqp_error_string2(ret);
38: if(error_str) {
39: throw Exception("amqp", 0, "%sfailed: %s", detail, error_str);
40: } else {
41: throw Exception("amqp", 0, "%sfailed: error %d", detail, ret);
42: }
43: }
44:
1.16 moko 45: static void check(VAmqp& self, amqp_rpc_reply_t rr, const char *detail=""){
1.6 moko 46: if(rr.reply_type == AMQP_RESPONSE_NORMAL)
47: return;
48:
1.16 moko 49: self.fstate = (rr.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION && rr.reply.id == AMQP_CHANNEL_CLOSE_METHOD) ? VAmqp::CHANNEL_DEAD : VAmqp::CONNECTION_DEAD;
50:
1.6 moko 51: // Extract error message from reply
52: const char* error_msg = 0;
53: size_t error_len = 0;
54: if(rr.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION) {
55: if(rr.reply.id == AMQP_CHANNEL_CLOSE_METHOD) {
56: amqp_channel_close_t *m = (amqp_channel_close_t *)rr.reply.decoded;
57: if(m->reply_text.len > 0 && m->reply_text.bytes) {
58: error_msg = (const char*)m->reply_text.bytes;
59: error_len = m->reply_text.len;
60: }
61: } else if(rr.reply.id == AMQP_CONNECTION_CLOSE_METHOD) {
62: amqp_connection_close_t *m = (amqp_connection_close_t *)rr.reply.decoded;
63: if(m->reply_text.len > 0 && m->reply_text.bytes) {
64: error_msg = (const char*)m->reply_text.bytes;
65: error_len = m->reply_text.len;
66: }
67: }
68: }
1.16 moko 69:
1.6 moko 70: if(error_msg) {
71: throw Exception("amqp", 0, "%sfailed: %.*s", detail, (int)error_len, error_msg);
72: } else if(rr.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION) {
1.16 moko 73: status_check(self, rr.library_error, detail);
1.6 moko 74: }
75:
76: throw Exception("amqp", 0, "%sfailed", detail);
77: }
78:
1.16 moko 79: static void amqp_connect(VAmqp& self, Request& r, HashStringValue* options) {
1.1 moko 80: const char* host_c = "localhost";
81: int port = 5672;
82: const char* user_c = "guest";
83: const char* pass_c = "guest";
84: const char* vhost_c = "/";
85: const char* locale_c = "en_US";
1.22 moko 86: int heartbeat_sec = 30;
87: int reconnect_interval_sec = 0;
88: bool tls_specified = false;
1.26 moko 89: #ifdef WITH_AMQP_SSL
1.5 moko 90: const char* tls_ca = 0;
91: const char* tls_cert = 0;
92: const char* tls_key = 0;
93: bool tls_verify = true;
1.22 moko 94: #endif
1.1 moko 95:
1.16 moko 96: if(options){
97: for(HashStringValue::Iterator i(*options); i; i.next()){
98: String::Body key=i.key();
99: Value* value=i.value();
100: if(key=="host"){
101: host_c=value->as_string().cstr();
102: } else if(key=="port"){
103: port=r.process(*value).as_int();
104: } else if(key=="user"){
105: user_c=value->as_string().cstr();
106: } else if(key=="password"){
107: pass_c=value->as_string().cstr();
108: } else if(key=="vhost"){
109: vhost_c=value->as_string().cstr();
110: } else if(key=="locale"){
111: locale_c=value->as_string().cstr();
112: } else if(key=="heartbeat"){
1.22 moko 113: heartbeat_sec=r.process(*value).as_int();
1.16 moko 114: } else if(key=="auto_reconnect"){
115: reconnect_interval_sec=r.process(*value).as_int();
116: } else if(key=="tls"){
1.26 moko 117: #ifdef WITH_AMQP_SSL
1.16 moko 118: tls_specified = true;
119: if(HashStringValue* tls_options=value->get_hash()){
120: for(HashStringValue::Iterator t(*tls_options); t; t.next()){
121: String::Body tkey=t.key();
122: Value* tval=t.value();
123: if(tkey=="ca"){
124: tls_ca=tval->as_string().cstr();
125: } else if(tkey=="cert"){
126: tls_cert=tval->as_string().cstr();
127: } else if(tkey=="key"){
128: tls_key=tval->as_string().cstr();
129: } else if(tkey=="verify"){
130: tls_verify=r.process(*tval).as_bool();
131: } else
132: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.5 moko 133: }
1.16 moko 134: }
1.22 moko 135: #else
136: throw Exception("amqp", 0, "AMQP SSL support is disabled");
137: #endif
1.16 moko 138: } else
139: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 140: }
141: }
142:
143: amqp_connection_state_t conn = amqp_new_connection();
1.5 moko 144: amqp_socket_t* socket = 0;
1.16 moko 145:
1.26 moko 146: #ifdef WITH_AMQP_SSL
1.5 moko 147: if(tls_specified) {
148: socket = amqp_ssl_socket_new(conn);
149: if(!socket)
150: throw Exception("amqp", 0, "failed to create SSL socket");
1.16 moko 151:
1.5 moko 152: // Set CA certificate if provided
153: if(tls_ca)
154: if(amqp_ssl_socket_set_cacert(socket, tls_ca))
155: throw Exception("amqp", 0, "failed to set CA certificate");
1.6 moko 156:
1.5 moko 157: // Set client certificate and key if provided
158: if(tls_cert && tls_key) {
159: if(amqp_ssl_socket_set_key(socket, tls_cert, tls_key))
160: throw Exception("amqp", 0, "failed to set client certificate/key");
161: } else if(tls_cert || tls_key) {
162: throw Exception("amqp", 0, "both cert and key must be specified for TLS");
163: }
1.6 moko 164:
1.5 moko 165: // If CA is provided, peer verification will use it
166: amqp_ssl_socket_set_verify_peer(socket, tls_verify && tls_ca);
167: // If verify=true, enable hostname verification
168: amqp_ssl_socket_set_verify_hostname(socket, tls_verify);
1.22 moko 169: } else
170: #endif
171: {
1.5 moko 172: socket = amqp_tcp_socket_new(conn);
173: if(!socket)
174: throw Exception("amqp", 0, "failed to create TCP socket");
175: }
1.16 moko 176:
177: status_check(self, amqp_socket_open(socket, host_c, port), tls_specified ? "open SSL socket " : "open TCP socket ");
1.1 moko 178:
1.22 moko 179: amqp_rpc_reply_t rlogin = amqp_login(conn, vhost_c, 0, 131072, heartbeat_sec, AMQP_SASL_METHOD_PLAIN, user_c, pass_c);
1.1 moko 180: if(rlogin.reply_type != AMQP_RESPONSE_NORMAL){
181: amqp_destroy_connection(conn);
1.16 moko 182: check(self, rlogin, "login ");
1.1 moko 183: }
184:
1.23 moko 185: amqp_channel_t channel = 1;
1.1 moko 186: amqp_channel_open(conn, channel);
187: amqp_rpc_reply_t ropen = amqp_get_rpc_reply(conn);
188: if(ropen.reply_type != AMQP_RESPONSE_NORMAL){
189: amqp_connection_close(conn, AMQP_REPLY_SUCCESS);
190: amqp_destroy_connection(conn);
1.16 moko 191: check(self, ropen, "open channel ");
1.1 moko 192: }
193:
1.16 moko 194: if(self.fconnection)
195: amqp_destroy_connection(self.fconnection);
196:
1.1 moko 197: self.fconnection = conn;
198: self.fchannel = channel;
1.16 moko 199: self.fstate = VAmqp::ALIVE;
200: self.freconnect_interval = reconnect_interval_sec;
201: }
202:
1.19 moko 203: // repairs a channel-level error cheaply: reopen on the same connection. Only valid when the server has
204: // already sent (or is about to send) channel.close - we're completing that handshake with close-ok, not
205: // initiating our own.
1.16 moko 206: static void amqp_repair_channel(VAmqp& self) {
207: amqp_channel_close_ok_t close_ok;
208: amqp_send_method(self.fconnection, self.fchannel, AMQP_CHANNEL_CLOSE_OK_METHOD, &close_ok);
209: amqp_channel_open(self.fconnection, self.fchannel);
210: check(self, amqp_get_rpc_reply(self.fconnection), "channel repair ");
211: self.fstate = VAmqp::ALIVE;
212: }
213:
1.19 moko 214: // voluntarily closes and reopens an otherwise-healthy channel
215: static void amqp_reset_channel(VAmqp& self) {
216: amqp_channel_close(self.fconnection, self.fchannel, AMQP_REPLY_SUCCESS);
217: amqp_channel_open(self.fconnection, self.fchannel);
218: amqp_get_rpc_reply(self.fconnection);
219: }
220:
1.16 moko 221: void VAmqp::ensure_connected() {
222: if(fstate == ALIVE)
223: return;
224:
225: if(fstate == CHANNEL_DEAD){
226: amqp_repair_channel(*this);
227: return;
228: }
229:
230: // CONNECTION_DEAD
231: if(freconnect_interval <= 0)
232: throw Exception("amqp", 0, "connection is dead (auto_reconnect is not enabled)");
233:
234: pa_sleep(freconnect_interval, 0);
235:
236: amqp_connect(*this, pa_thread_request(), fcreate_options);
237: }
238:
239: #endif // WITH_AMQP
240:
241: static void _create(Request& r, MethodParams& params) {
242: VAmqp& self=GET_SELF(r, VAmqp);
243:
244: #ifdef WITH_AMQP
245: self.fcreate_options = params.count()>0 ? params.as_hash(0) : 0;
246: amqp_connect(self, r, self.fcreate_options);
1.1 moko 247: #else
248: (void)params; (void)self;
249: throw Exception("amqp", 0, "compiled without amqp support");
1.6 moko 250: #endif // WITH_AMQP
1.1 moko 251: }
252:
253: #ifdef WITH_AMQP
254:
1.2 moko 255: #define AMQP_STRING(s,l) new String(String::C(pa_strdup((const char*)(s), (l)), (l)))
256: #define AMQP_VSTRING(s,l) new VString(*AMQP_STRING(s,l))
257:
1.17 moko 258: // broker-defined arguments/headers (x-message-ttl, x-dead-letter-exchange, ...)
259: // Type is taken from how the value was assigned: [] -> string, () -> number, (true|false) -> bool
260: static amqp_table_t amqp_build_arguments_table(Request& r, HashStringValue* arguments) {
261: amqp_table_t table = amqp_empty_table;
262: size_t count = arguments ? arguments->count() : 0;
263: if(!count)
264: return table;
265:
266: amqp_table_entry_t* entries = (amqp_table_entry_t*)pa_malloc(count * sizeof(amqp_table_entry_t));
267: size_t i = 0;
268: for(HashStringValue::Iterator it(*arguments); it; it.next()){
269: entries[i].key = amqp_cstring_bytes(it.key().cstr());
270:
271: Value& value = r.process(*it.value());
272: if(value.is_string() || value.is_void()){
273: entries[i].value.kind = AMQP_FIELD_KIND_UTF8;
274: entries[i].value.value.bytes = amqp_cstring_bytes(value.as_string().cstr());
275: } else if(value.is_bool()){
276: entries[i].value.kind = AMQP_FIELD_KIND_BOOLEAN;
277: entries[i].value.value.boolean = value.as_bool();
278: } else {
1.18 moko 279: double d = value.as_double();
280: double rounded = round(d);
281: if(ulp_eq_double(d, rounded)){
282: entries[i].value.kind = AMQP_FIELD_KIND_I64;
283: entries[i].value.value.i64 = (int64_t)rounded;
284: } else {
285: entries[i].value.kind = AMQP_FIELD_KIND_F64;
286: entries[i].value.value.f64 = d;
287: }
1.17 moko 288: }
289: i++;
290: }
291:
292: table.num_entries = (int)count;
293: table.entries = entries;
294: return table;
295: }
296:
297: // reverse of amqp_build_arguments_table - decodes a broker-provided field table (e.g. message headers) back into a hash.
298: static VHash* amqp_table_to_hash(amqp_table_t& table);
299:
300: static Value* amqp_field_to_value(amqp_field_value_t& f) {
301: switch(f.kind){
302: case AMQP_FIELD_KIND_UTF8:
303: case AMQP_FIELD_KIND_BYTES:
304: return AMQP_VSTRING(f.value.bytes.bytes, f.value.bytes.len);
305: case AMQP_FIELD_KIND_BOOLEAN:
306: return &VBool::get(f.value.boolean);
307: case AMQP_FIELD_KIND_I8: return new VInt((pa_wint)f.value.i8);
308: case AMQP_FIELD_KIND_U8: return new VInt((pa_wint)f.value.u8);
309: case AMQP_FIELD_KIND_I16: return new VInt((pa_wint)f.value.i16);
310: case AMQP_FIELD_KIND_U16: return new VInt((pa_wint)f.value.u16);
311: case AMQP_FIELD_KIND_I32: return new VInt((pa_wint)f.value.i32);
312: case AMQP_FIELD_KIND_U32: return new VInt((pa_wint)f.value.u32);
313: case AMQP_FIELD_KIND_I64: return new VInt((pa_wint)f.value.i64);
314: case AMQP_FIELD_KIND_U64: return new VInt((pa_wint)f.value.u64);
315: case AMQP_FIELD_KIND_TIMESTAMP: return new VInt((pa_wint)f.value.u64);
316: case AMQP_FIELD_KIND_F32: return new VDouble((double)f.value.f32);
317: case AMQP_FIELD_KIND_F64: return new VDouble(f.value.f64);
318: case AMQP_FIELD_KIND_DECIMAL: {
319: double divisor=1;
320: for(uint8_t i=0; i<f.value.decimal.decimals; i++) divisor*=10;
321: return new VDouble(f.value.decimal.value/divisor);
322: }
323: case AMQP_FIELD_KIND_TABLE:
324: return amqp_table_to_hash(f.value.table);
325: case AMQP_FIELD_KIND_ARRAY: {
326: VArray* result=new VArray();
327: ArrayValue& av=result->array();
328: for(int i=0; i<f.value.array.num_entries; i++)
329: av+=amqp_field_to_value(f.value.array.entries[i]);
330: return result;
331: }
332: case AMQP_FIELD_KIND_VOID:
333: return VVoid::get();
334: default:
335: return VString::empty();
336: }
337: }
338:
339: static VHash* amqp_table_to_hash(amqp_table_t& table) {
340: VHash* result=new VHash;
341: HashStringValue* h=result->get_hash();
342: for(int i=0; i<table.num_entries; i++){
343: amqp_table_entry_t& e=table.entries[i];
344: h->put(*AMQP_STRING(e.key.bytes, e.key.len), amqp_field_to_value(e.value));
345: }
346: return result;
347: }
348:
1.1 moko 349: static void _publish(Request& r, MethodParams& params) {
350: VAmqp& self=GET_SELF(r, VAmqp);
351: const String &msg=params.as_string(0, "msg must be string");
352: const char* exchange_c = ""; // default exchange
353: const char* routing_key_c = 0;
354: bool mandatory=false;
355:
356: amqp_basic_properties_t props;
357: props._flags = 0;
358:
359: if(params.count()>1){
360: if(HashStringValue* options=params.as_hash(1)){
361: for(HashStringValue::Iterator i(*options); i; i.next()){
362: String::Body key=i.key();
363: Value* value=i.value();
364: if(key=="exchange"){
365: exchange_c=value->as_string().cstr();
366: } else if(key=="routing_key"){
367: routing_key_c=value->as_string().cstr();
368: } else if(key=="queue"){
1.3 moko 369: routing_key_c=value->as_string().cstr();
1.1 moko 370: } else if(key=="mandatory"){
371: mandatory=r.process(*value).as_bool();
1.3 moko 372: } else if(key=="content_type"){
373: const char* v=value->as_string().cstr();
374: props.content_type=amqp_cstring_bytes(v);
375: props._flags|=AMQP_BASIC_CONTENT_TYPE_FLAG;
376: } else if(key=="content_encoding"){
377: const char* v=value->as_string().cstr();
378: props.content_encoding=amqp_cstring_bytes(v);
379: props._flags|=AMQP_BASIC_CONTENT_ENCODING_FLAG;
380: } else if(key=="delivery_mode"){
381: uint8_t dm=(uint8_t)value->as_int();
382: props.delivery_mode=dm;
383: props._flags|=AMQP_BASIC_DELIVERY_MODE_FLAG;
384: } else if(key=="priority"){
385: uint8_t pr=(uint8_t)value->as_int();
386: props.priority=pr;
387: props._flags|=AMQP_BASIC_PRIORITY_FLAG;
388: } else if(key=="correlation_id"){
389: const char* v=value->as_string().cstr();
390: props.correlation_id=amqp_cstring_bytes(v);
391: props._flags|=AMQP_BASIC_CORRELATION_ID_FLAG;
392: } else if(key=="reply_to"){
393: const char* v=value->as_string().cstr();
394: props.reply_to=amqp_cstring_bytes(v);
395: props._flags|=AMQP_BASIC_REPLY_TO_FLAG;
396: } else if(key=="expiration"){
397: const char* v=value->as_string().cstr();
398: props.expiration=amqp_cstring_bytes(v);
399: props._flags|=AMQP_BASIC_EXPIRATION_FLAG;
400: } else if(key=="message_id"){
401: const char* v=value->as_string().cstr();
402: props.message_id=amqp_cstring_bytes(v);
403: props._flags|=AMQP_BASIC_MESSAGE_ID_FLAG;
404: } else if(key=="timestamp"){
405: uint64_t ts=(uint64_t)value->as_double();
406: props.timestamp=ts;
407: props._flags|=AMQP_BASIC_TIMESTAMP_FLAG;
408: } else if(key=="type"){
409: const char* v=value->as_string().cstr();
410: props.type=amqp_cstring_bytes(v);
411: props._flags|=AMQP_BASIC_TYPE_FLAG;
412: } else if(key=="user_id"){
413: const char* v=value->as_string().cstr();
414: props.user_id=amqp_cstring_bytes(v);
415: props._flags|=AMQP_BASIC_USER_ID_FLAG;
416: } else if(key=="app_id"){
417: const char* v=value->as_string().cstr();
418: props.app_id=amqp_cstring_bytes(v);
419: props._flags|=AMQP_BASIC_APP_ID_FLAG;
1.18 moko 420: } else if(key=="cluster_id"){
421: const char* v=value->as_string().cstr();
422: props.cluster_id=amqp_cstring_bytes(v);
423: props._flags|=AMQP_BASIC_CLUSTER_ID_FLAG;
1.3 moko 424: } else if(key=="headers"){
1.17 moko 425: props.headers=amqp_build_arguments_table(r, value->get_hash());
426: props._flags|=AMQP_BASIC_HEADERS_FLAG;
427: } else
1.1 moko 428: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
429: }
430: }
431: }
432:
433: if(!routing_key_c)
434: throw Exception("amqp", 0, "routing_key or queue must be specified");
435:
436: amqp_bytes_t body;
437: body.len = msg.length();
438: body.bytes=(void*)msg.cstr();
439:
1.3 moko 440: int ret = amqp_basic_publish(self.connection(), self.channel(), amqp_cstring_bytes(exchange_c), amqp_cstring_bytes(routing_key_c), mandatory, 0, &props, body);
1.1 moko 441:
1.16 moko 442: status_check(self, ret, "publish ");
1.1 moko 443: }
444:
445: static void _release(Request& r, MethodParams&) {
1.28 ! moko 446: GET_SELF(r, VAmqp).release();
1.1 moko 447: }
448:
1.15 moko 449: // to allow both [] and () call syntax
450: static uint64_t as_delivery_tag(MethodParams& params, int index=0) {
451: const String &tag_s=params.as_string(index, "delivery tag must not be code");
452: return pa_atoul(tag_s.cstr());
453: }
454:
1.1 moko 455: static void _ack(Request& r, MethodParams& params) {
456: VAmqp& self=GET_SELF(r, VAmqp);
1.15 moko 457: int ret = amqp_basic_ack(self.connection(), self.channel(), as_delivery_tag(params), 0);
1.16 moko 458: status_check(self, ret, "ack ");
1.1 moko 459: }
460:
461: static void _nack(Request& r, MethodParams& params) {
462: VAmqp& self=GET_SELF(r, VAmqp);
1.15 moko 463: uint64_t tag=as_delivery_tag(params);
1.1 moko 464: bool requeue=false;
465: if(params.count()>1){
466: if(HashStringValue* options=params.as_hash(1)){
467: for(HashStringValue::Iterator i(*options); i; i.next()){
468: if(i.key()=="requeue"){
469: requeue=r.process(*i.value()).as_bool();
470: } else
471: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
472: }
473: }
474: }
1.15 moko 475: int ret = amqp_basic_nack(self.connection(), self.channel(), tag, 0, requeue);
1.16 moko 476: status_check(self, ret, "nack ");
1.1 moko 477: }
478:
479: static void _qos(Request& r, MethodParams& params) {
480: VAmqp& self=GET_SELF(r, VAmqp);
481: uint16_t prefetch_count=0;
482: if(params.count()>0){
483: if(HashStringValue* options=params.as_hash(0)){
484: for(HashStringValue::Iterator i(*options); i; i.next()){
485: if(i.key()=="prefetch_count"){
486: int pc=r.process(*i.value()).as_int();
487: prefetch_count= pc<0 ? 0 : (pc>65535 ? 65535 : (uint16_t)pc);
488: } else
489: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
490: }
491: }
492: }
1.16 moko 493: amqp_basic_qos(self.connection(), self.channel(), 0, prefetch_count, 0);
494: check(self, amqp_get_rpc_reply(self.connection()), "qos ");
1.1 moko 495: }
496:
497: static void _reject(Request& r, MethodParams& params) {
498: VAmqp& self=GET_SELF(r, VAmqp);
1.15 moko 499: uint64_t tag=as_delivery_tag(params);
1.1 moko 500: bool requeue=true; // by default return to queue
501: if(params.count()>1){
502: if(HashStringValue* options = params.as_hash(1)){
503: for(HashStringValue::Iterator i(*options); i; i.next()){
504: if(i.key() == "requeue"){
505: requeue=r.process(*i.value()).as_bool();
506: } else
507: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
508: }
509: }
510: }
1.15 moko 511: int ret = amqp_basic_reject(self.connection(), self.channel(), tag, requeue);
1.16 moko 512: status_check(self, ret, "reject ");
1.1 moko 513: }
514:
1.8 moko 515: static void _declare(Request& r, MethodParams& params) {
1.1 moko 516: VAmqp& self=GET_SELF(r, VAmqp);
1.8 moko 517: const char* exchange_c = 0;
518: const char* queue_c = 0;
1.1 moko 519: const char* type_c = "direct";
1.12 moko 520: bool passive=false, durable=false, auto_delete=false, internal=false, exclusive=false;
1.17 moko 521: amqp_table_t arguments=amqp_empty_table;
1.8 moko 522: if(HashStringValue* options=params.as_hash(0)){
523: for(HashStringValue::Iterator i(*options); i; i.next()){
524: String::Body key=i.key();
525: Value* value=i.value();
526: if(key=="exchange"){
527: exchange_c=value->as_string().cstr();
528: } else if(key=="queue"){
529: queue_c=value->as_string().cstr();
530: } else if(key=="type"){
531: type_c=value->as_string().cstr();
532: } else if(key=="passive"){
533: passive=r.process(*value).as_bool();
534: } else if(key=="durable"){
535: durable=r.process(*value).as_bool();
536: } else if(key=="auto_delete"){
537: auto_delete=r.process(*value).as_bool();
1.11 moko 538: } else if(key=="internal"){
539: internal=r.process(*value).as_bool();
540: } else if(key=="exclusive"){
541: exclusive=r.process(*value).as_bool();
1.17 moko 542: } else if(key=="arguments"){
543: arguments=amqp_build_arguments_table(r, value->get_hash());
1.8 moko 544: } else
545: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 546: }
547: }
1.8 moko 548: if(!exchange_c && !queue_c)
549: throw Exception("amqp", 0, "exchange or queue must be specified");
550:
551: if(exchange_c){
1.17 moko 552: amqp_exchange_declare(self.connection(), self.channel(), amqp_cstring_bytes(exchange_c), amqp_cstring_bytes(type_c), passive, durable, auto_delete, internal, arguments);
1.16 moko 553: check(self, amqp_get_rpc_reply(self.connection()));
1.8 moko 554: }
1.1 moko 555:
1.8 moko 556: if(queue_c){
1.17 moko 557: amqp_queue_declare_ok_t *ok = amqp_queue_declare(self.connection(), self.channel(), *queue_c ? amqp_cstring_bytes(queue_c) : amqp_empty_bytes, passive, durable, exclusive, auto_delete, arguments);
1.16 moko 558: check(self, amqp_get_rpc_reply(self.connection()));
1.8 moko 559: if(!*queue_c && ok){
560: r.write(*AMQP_STRING(ok->queue.bytes, ok->queue.len));
1.1 moko 561: }
562: }
563: }
564:
1.8 moko 565: static void _delete(Request& r, MethodParams& params) {
1.1 moko 566: VAmqp& self=GET_SELF(r, VAmqp);
1.8 moko 567: const char* exchange_c = 0;
568: const char* queue_c = 0;
1.11 moko 569: bool if_unused=false, if_empty=false;
1.8 moko 570: if(HashStringValue* options=params.as_hash(0)){
571: for(HashStringValue::Iterator i(*options); i; i.next()){
572: String::Body key=i.key();
573: Value* value=i.value();
574: if(key=="exchange"){
575: exchange_c=value->as_string().cstr();
576: } else if(key=="queue"){
577: queue_c=value->as_string().cstr();
578: } else if(key=="if_unused"){
579: if_unused=r.process(*value).as_bool();
580: } else if(key=="if_empty"){
581: if_empty=r.process(*value).as_bool();
582: } else
583: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 584: }
585: }
1.8 moko 586: if(!exchange_c && !queue_c)
587: throw Exception("amqp", 0, "exchange or queue must be specified");
588:
589: if(exchange_c){
590: amqp_exchange_delete(self.connection(), self.channel(), amqp_cstring_bytes(exchange_c), if_unused);
1.16 moko 591: check(self, amqp_get_rpc_reply(self.connection()));
1.1 moko 592: }
593:
1.8 moko 594: if(queue_c){
595: amqp_queue_delete(self.connection(), self.channel(), amqp_cstring_bytes(queue_c), if_unused, if_empty);
1.16 moko 596: check(self, amqp_get_rpc_reply(self.connection()));
1.1 moko 597: }
598: }
599:
1.8 moko 600: static void _bind(Request& r, MethodParams& params) {
1.1 moko 601: VAmqp& self=GET_SELF(r, VAmqp);
602: const char* exchange_c=0;
603: const char* queue_c=0;
604: const char* routing_key_c="";
1.8 moko 605: if(HashStringValue* options=params.as_hash(0)){
606: for(HashStringValue::Iterator i(*options); i; i.next()){
607: String::Body key=i.key();
608: Value* value=i.value();
609: if(key=="exchange"){
610: exchange_c=value->as_string().cstr();
611: } else if(key=="queue"){
612: queue_c=value->as_string().cstr();
613: } else if(key=="routing_key"){
614: routing_key_c=value->as_string().cstr();
615: } else
616: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 617: }
618: }
619: if(!exchange_c || !queue_c) throw Exception("amqp", 0, "exchange and queue are required");
620: amqp_queue_bind(self.connection(), self.channel(), amqp_cstring_bytes(queue_c), amqp_cstring_bytes(exchange_c), amqp_cstring_bytes(routing_key_c), amqp_empty_table);
1.16 moko 621: check(self, amqp_get_rpc_reply(self.connection()));
1.1 moko 622: }
623:
1.8 moko 624: static void _unbind(Request& r, MethodParams& params) {
1.1 moko 625: VAmqp& self=GET_SELF(r, VAmqp);
626: const char* exchange_c=0;
627: const char* queue_c=0;
628: const char* routing_key_c="";
1.8 moko 629: if(HashStringValue* options=params.as_hash(0)){
630: for(HashStringValue::Iterator i(*options); i; i.next()){
631: String::Body key=i.key();
632: Value* value=i.value();
633: if(key=="exchange"){
634: exchange_c=value->as_string().cstr();
635: } else if(key=="queue"){
636: queue_c=value->as_string().cstr();
637: } else if(key=="routing_key"){
638: routing_key_c=value->as_string().cstr();
639: } else
640: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 641: }
642: }
643: if(!exchange_c || !queue_c) throw Exception("amqp", 0, "exchange and queue are required");
644: amqp_queue_unbind(self.connection(), self.channel(), amqp_cstring_bytes(queue_c), amqp_cstring_bytes(exchange_c), amqp_cstring_bytes(routing_key_c), amqp_empty_table);
1.16 moko 645: check(self, amqp_get_rpc_reply(self.connection()));
1.1 moko 646: }
647:
1.8 moko 648: static void _purge(Request& r, MethodParams& params) {
649: VAmqp& self=GET_SELF(r, VAmqp);
650: const char* queue_c = 0;
651: if(HashStringValue* options=params.as_hash(0)){
652: for(HashStringValue::Iterator i(*options); i; i.next()){
653: String::Body key=i.key();
654: Value* value=i.value();
655: if(key=="queue"){
656: queue_c=value->as_string().cstr();
657: } else
658: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
659: }
660: }
661: if(!queue_c)
662: throw Exception("amqp", 0, "queue must be specified");
663:
1.9 moko 664: amqp_queue_purge_ok_t *ok = amqp_queue_purge(self.connection(), self.channel(), amqp_cstring_bytes(queue_c));
1.16 moko 665: check(self, amqp_get_rpc_reply(self.connection()));
1.9 moko 666: r.write(*new VInt(ok ? ok->message_count : 0));
1.8 moko 667: }
668:
669: static void _info(Request& r, MethodParams& params) {
670: VAmqp& self = GET_SELF(r, VAmqp);
671: const char* queue_c = 0;
672:
673: if (HashStringValue* options=params.as_hash(0)) {
674: for (HashStringValue::Iterator i(*options); i; i.next()) {
675: String::Body key=i.key();
676: Value* value=i.value();
677: if(key=="queue"){
678: queue_c=value->as_string().cstr();
679: } else {
680: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
681: }
682: }
683: }
684:
685: if (!queue_c)
686: throw Exception("amqp", 0, "queue must be specified");
687:
688: amqp_queue_declare_ok_t* ok = amqp_queue_declare(self.connection(), self.channel(), amqp_cstring_bytes(queue_c), /*passive*/ 1, 0, 0, 0, amqp_empty_table);
1.16 moko 689: check(self, amqp_get_rpc_reply(self.connection()));
1.8 moko 690:
691: Value& result=*new VHash;
1.9 moko 692: if(ok){
693: result.put_element(*new String("queue"), AMQP_VSTRING(ok->queue.bytes, ok->queue.len));
694: result.put_element(*new String("messages"), new VInt(ok->message_count));
695: result.put_element(*new String("consumers"), new VInt(ok->consumer_count));
696: }
1.8 moko 697: r.write(result);
698: }
699:
700: static VHash *amqp_message_hash(amqp_envelope_t &envelope) {
701: VHash *result=new VHash;
702: HashStringValue* h=result->get_hash();
703: h->put("msg", AMQP_VSTRING(envelope.message.body.bytes, envelope.message.body.len));
704: h->put("delivery_tag", new VInt(envelope.delivery_tag));
705: h->put("consumer_tag", AMQP_VSTRING(envelope.consumer_tag.bytes, envelope.consumer_tag.len));
706: h->put("exchange", AMQP_VSTRING(envelope.exchange.bytes, envelope.exchange.len));
1.17 moko 707: h->put("routing_key", AMQP_VSTRING(envelope.routing_key.bytes, envelope.routing_key.len));
708: h->put("redelivered", &VBool::get(envelope.redelivered));
709:
710: // properties are only put when the publisher actually set them (per the wire's own _flags bitmask) -
711: // same handful of allocations as the fields above, just conditional on what's actually present
712: amqp_basic_properties_t& props=envelope.message.properties;
713: if(props._flags & AMQP_BASIC_CONTENT_TYPE_FLAG)
714: h->put("content_type", AMQP_VSTRING(props.content_type.bytes, props.content_type.len));
715: if(props._flags & AMQP_BASIC_CONTENT_ENCODING_FLAG)
716: h->put("content_encoding", AMQP_VSTRING(props.content_encoding.bytes, props.content_encoding.len));
717: if(props._flags & AMQP_BASIC_HEADERS_FLAG)
718: h->put("headers", amqp_table_to_hash(props.headers));
719: if(props._flags & AMQP_BASIC_DELIVERY_MODE_FLAG)
720: h->put("delivery_mode", new VInt(props.delivery_mode));
721: if(props._flags & AMQP_BASIC_PRIORITY_FLAG)
722: h->put("priority", new VInt(props.priority));
723: if(props._flags & AMQP_BASIC_CORRELATION_ID_FLAG)
724: h->put("correlation_id", AMQP_VSTRING(props.correlation_id.bytes, props.correlation_id.len));
725: if(props._flags & AMQP_BASIC_REPLY_TO_FLAG)
726: h->put("reply_to", AMQP_VSTRING(props.reply_to.bytes, props.reply_to.len));
727: if(props._flags & AMQP_BASIC_EXPIRATION_FLAG)
728: h->put("expiration", AMQP_VSTRING(props.expiration.bytes, props.expiration.len));
729: if(props._flags & AMQP_BASIC_MESSAGE_ID_FLAG)
730: h->put("message_id", AMQP_VSTRING(props.message_id.bytes, props.message_id.len));
731: if(props._flags & AMQP_BASIC_TIMESTAMP_FLAG)
732: h->put("timestamp", new VInt((pa_wint)props.timestamp));
733: if(props._flags & AMQP_BASIC_TYPE_FLAG)
734: h->put("type", AMQP_VSTRING(props.type.bytes, props.type.len));
735: if(props._flags & AMQP_BASIC_USER_ID_FLAG)
736: h->put("user_id", AMQP_VSTRING(props.user_id.bytes, props.user_id.len));
737: if(props._flags & AMQP_BASIC_APP_ID_FLAG)
738: h->put("app_id", AMQP_VSTRING(props.app_id.bytes, props.app_id.len));
739: if(props._flags & AMQP_BASIC_CLUSTER_ID_FLAG)
740: h->put("cluster_id", AMQP_VSTRING(props.cluster_id.bytes, props.cluster_id.len));
741:
1.8 moko 742: return result;
743: }
744:
1.14 moko 745: // timeout<0 - wait forever (NULL), timeout==0 - don't wait (poll), timeout>0 - wait up to timeout seconds
746: static struct timeval* amqp_wait_tv(struct timeval& tv, int timeout){
747: if(timeout<0)
748: return NULL;
749: tv.tv_sec=timeout;
750: tv.tv_usec=0;
751: return &tv;
752: }
753:
1.17 moko 754: // amqp_consume_message() returns AMQP_STATUS_UNEXPECTED_STATE when it read a frame other than a deliver while polling.
755: // Per its own documented contract, read that pending frame to find out what it actually was:
756: // - a basic.return for an earlier mandatory publish that found no route: benign, doesn't close anything;
757: // drain the returned message (header+body, still pending right behind it) and retry - the real
758: // message (if any) is still coming
759: // - anything else: a genuine channel/connection close (typically after a protocol violation) - build a
760: // reply so check() can classify it correctly (cheap channel repair vs full reconnect)
1.23 moko 761: static amqp_rpc_reply_t amqp_consume_message_checked(amqp_connection_state_t conn, amqp_channel_t channel, amqp_envelope_t* envelope, struct timeval* tv) {
1.17 moko 762: for(;;) {
763: amqp_rpc_reply_t res = amqp_consume_message(conn, envelope, tv, 0);
764: if(res.reply_type != AMQP_RESPONSE_LIBRARY_EXCEPTION || res.library_error != AMQP_STATUS_UNEXPECTED_STATE)
765: return res;
766:
767: amqp_frame_t frame;
768: if(amqp_simple_wait_frame(conn, &frame) != AMQP_STATUS_OK || frame.frame_type != AMQP_FRAME_METHOD)
769: return res; // give up, let the original UNEXPECTED_STATE be treated as fatal
770:
771: if(frame.payload.method.id == AMQP_BASIC_RETURN_METHOD) {
772: amqp_message_t message;
773: if(amqp_read_message(conn, channel, &message, 0).reply_type == AMQP_RESPONSE_NORMAL)
774: amqp_destroy_message(&message);
775: continue;
776: }
777:
778: res.reply_type = AMQP_RESPONSE_SERVER_EXCEPTION;
779: res.reply.id = frame.payload.method.id;
780: res.reply.decoded = frame.payload.method.decoded;
781: return res;
782: }
1.16 moko 783: }
784:
1.18 moko 785: // Auto-object used for cancelling the consumer when the enclosing scope exits. A cancel failure here must
786: // never mask whatever error is already propagating, so its result is discarded rather than check()ed.
787: class Temp_amqp_consumer {
788: public:
1.19 moko 789: Temp_amqp_consumer(VAmqp& aself, const char* aconsumer_tag, bool adrain): self(aself), consumer_tag(aconsumer_tag), drain(adrain) {}
1.18 moko 790: ~Temp_amqp_consumer() {
791: if(!consumer_tag || self.fstate != VAmqp::ALIVE) return;
792: amqp_basic_cancel(self.fconnection, self.fchannel, amqp_cstring_bytes(consumer_tag));
793: amqp_get_rpc_reply(self.fconnection);
1.19 moko 794: if(drain){
795: // The broker may have already sent a deliver frame for this (now cancelled) consumer before it even saw our cancel,
796: // so it can still be sitting in the library's own buffer. Its delivery tag belongs to the pre-reset channel and
797: // won't exist anymore afterward, so drain anything already in flight - otherwise it would surface later, misattributed.
798: amqp_envelope_t envelope;
799: struct timeval no_wait = {0,0};
800: while(amqp_consume_message(self.fconnection, &envelope, &no_wait, 0).reply_type == AMQP_RESPONSE_NORMAL)
801: amqp_destroy_envelope(&envelope);
802: amqp_reset_channel(self);
803: }
1.18 moko 804: }
805: private:
806: VAmqp& self;
807: const char* consumer_tag;
1.19 moko 808: bool drain;
1.18 moko 809: };
810:
1.1 moko 811: static void _consume(Request& r, MethodParams& params) {
812: VAmqp& self=GET_SELF(r, VAmqp);
813: const char* queue_c=0;
814: const char* consumer_tag_c=0;
1.17 moko 815: bool ack=true, exclusive=false;
1.14 moko 816: int count=1; bool count_specified=false;
817: int timeout=0; bool timeout_specified=false;
1.1 moko 818: Junction* callback=0;
819:
1.2 moko 820: if(HashStringValue* options=params.as_hash(0)){
821: for(HashStringValue::Iterator i(*options); i; i.next()){
822: String::Body key=i.key();
823: Value* value=i.value();
1.3 moko 824: if(key=="callback"){
825: callback=value->get_junction();
826: } else if(key=="queue"){
1.2 moko 827: queue_c=value->as_string().cstr();
828: } else if(key=="consumer_tag"){
829: consumer_tag_c=value->as_string().cstr();
1.17 moko 830: } else if(key=="ack"){
831: ack=r.process(*value).as_bool();
1.10 moko 832: } else if(key=="exclusive"){
833: exclusive=r.process(*value).as_bool();
1.8 moko 834: } else if(key=="count"){
835: count=r.process(*value).as_int();
1.14 moko 836: count_specified=true;
837: } else if(key=="timeout"){
838: timeout=r.process(*value).as_int();
839: timeout_specified=true;
1.2 moko 840: } else
841: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.1 moko 842: }
843: }
844:
1.8 moko 845: if(!queue_c) throw Exception("amqp", 0, "queue must be specified");
1.14 moko 846: if(count==0) throw Exception("amqp", 0, "count must not be zero");
847:
848: // listen mode (callback): count/timeout unlimited by default - runs until stop_consume/timeout/error
849: // pull mode (no callback): count(1)/timeout(0) by default - returns whatever is ready right now
850: if(!count_specified)
851: count = callback ? -1 : 1;
852: if(!timeout_specified)
853: timeout = callback ? -1 : 0;
1.1 moko 854:
1.9 moko 855: amqp_basic_consume_ok_t *ok = amqp_basic_consume(self.connection(), self.channel(), amqp_cstring_bytes(queue_c),
1.1 moko 856: consumer_tag_c ? amqp_cstring_bytes(consumer_tag_c) : amqp_empty_bytes,
1.17 moko 857: 0 /*no_local*/, !ack, exclusive, amqp_empty_table);
1.16 moko 858: check(self, amqp_get_rpc_reply(self.connection()));
1.1 moko 859:
1.15 moko 860: // amqp_maybe_release_buffers() recycles ok->consumer_tag
861: const char* consumer_tag_copy = ok ? pa_strdup((const char*)ok->consumer_tag.bytes, ok->consumer_tag.len) : 0;
1.19 moko 862: Temp_amqp_consumer cancel_consumer(self, consumer_tag_copy, ack && callback);
1.15 moko 863:
1.14 moko 864: struct timeval tv;
865:
1.8 moko 866: if(callback){
867: self.fstop=false;
1.14 moko 868: for(int received=0; !self.fstop && (count<0 || received<count); received++){
1.8 moko 869: amqp_envelope_t envelope;
870: memset(&envelope, 0, sizeof(envelope));
871: amqp_maybe_release_buffers(self.connection());
1.14 moko 872: // timeout is the max idle gap between messages, re-armed on every wait
1.17 moko 873: amqp_rpc_reply_t res = amqp_consume_message_checked(self.connection(), self.channel(), &envelope, amqp_wait_tv(tv, timeout));
1.8 moko 874: if(res.reply_type == AMQP_RESPONSE_NORMAL){
875: VHash *vh=amqp_message_hash(envelope);
876: Value *params_cb[]={vh};
877: METHOD_FRAME_ACTION(*callback->method, r.method_frame, callback->self, {
878: frame.store_params(params_cb, 1);
879: r.call(frame);
880: });
881: amqp_destroy_envelope(&envelope);
882: } else if(res.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION && res.library_error == AMQP_STATUS_TIMEOUT) {
1.14 moko 883: break; // idle too long - stop cleanly
1.8 moko 884: } else {
1.17 moko 885: check(self, res, "consume ");
1.8 moko 886: }
887: }
888: } else {
889: VArray& result=*new VArray();
890: ArrayValue& result_array=result.array();
891:
1.14 moko 892: for(int received=0; count<0 || received<count; received++){
1.8 moko 893: amqp_envelope_t envelope;
894: memset(&envelope, 0, sizeof(envelope));
895: amqp_maybe_release_buffers(self.connection());
1.14 moko 896: // timeout applies only to the first message of the batch;
897: // the rest is drained with a non-blocking poll until nothing more is ready
1.17 moko 898: amqp_rpc_reply_t res = amqp_consume_message_checked(self.connection(), self.channel(), &envelope, amqp_wait_tv(tv, received==0 ? timeout : 0));
1.8 moko 899: if(res.reply_type == AMQP_RESPONSE_NORMAL){
900: result_array+=amqp_message_hash(envelope);
901: amqp_destroy_envelope(&envelope);
1.14 moko 902: } else if(res.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION && res.library_error == AMQP_STATUS_TIMEOUT) {
903: break; // nothing (more) ready - return what we have
1.8 moko 904: } else {
1.17 moko 905: check(self, res, "consume ");
1.8 moko 906: }
1.1 moko 907: }
1.8 moko 908: r.write(result);
1.1 moko 909: }
910: }
911:
912: static void _stop_consume(Request& r, MethodParams&) {
913: VAmqp& self=GET_SELF(r, VAmqp);
914: self.fstop=true;
915: }
916:
1.6 moko 917: #endif // WITH_AMQP
1.1 moko 918:
919: // constructor
920: MAmqp::MAmqp(): Methoded("amqp") {
921: add_native_method("create", Method::CT_DYNAMIC, _create, 0, 1);
922: #ifdef WITH_AMQP
923: add_native_method("publish", Method::CT_DYNAMIC, _publish, 1, 2);
924: add_native_method("release", Method::CT_DYNAMIC, _release, 0, 0);
925: add_native_method("ack", Method::CT_DYNAMIC, _ack, 1, 1);
926: add_native_method("nack", Method::CT_DYNAMIC, _nack, 1, 2);
927: add_native_method("reject", Method::CT_DYNAMIC, _reject, 1, 2);
928: add_native_method("qos", Method::CT_DYNAMIC, _qos, 0, 1);
1.8 moko 929: add_native_method("declare", Method::CT_DYNAMIC, _declare, 1, 1);
930: add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
931: add_native_method("bind", Method::CT_DYNAMIC, _bind, 1, 1);
932: add_native_method("unbind", Method::CT_DYNAMIC, _unbind, 1, 1);
933: add_native_method("purge", Method::CT_DYNAMIC, _purge, 1, 1);
934: add_native_method("info", Method::CT_DYNAMIC, _info, 1, 1);
1.2 moko 935: add_native_method("consume", Method::CT_DYNAMIC, _consume, 1, 1);
1.1 moko 936: add_native_method("stop_consume", Method::CT_DYNAMIC, _stop_consume, 0, 0);
1.6 moko 937: #endif // WITH_AMQP
1.1 moko 938: }
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