63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
#include <string.h>
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#include <iostream>
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#include <amqp.h>
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#include <amqp_tcp_socket.h>
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int fib(int n)
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{
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if (n == 0)
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return 0;
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else if (n == 1)
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return 1;
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else
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return fib(n-1) + fib(n-2);
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}
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int main(int argc, char const *const *argv)
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{
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amqp_connection_state_t conn = amqp_new_connection();
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amqp_socket_t *socket = amqp_tcp_socket_new(conn);
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amqp_socket_open(socket, "localhost", AMQP_PROTOCOL_PORT);
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amqp_login(conn, "/", 0, AMQP_DEFAULT_FRAME_SIZE, 0, AMQP_SASL_METHOD_PLAIN, "guest", "guest");
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const amqp_channel_t KChannel = 1;
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amqp_channel_open(conn, KChannel);
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amqp_bytes_t queueName(amqp_cstring_bytes("rpc_queue"));
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amqp_queue_declare(conn, KChannel, queueName, false, false, false, false, amqp_empty_table);
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amqp_basic_qos(conn, KChannel, 0, /*prefetch_count*/1, 0);
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amqp_basic_consume(conn, KChannel, queueName, amqp_empty_bytes, false, /* auto ack*/false, false, amqp_empty_table);
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std::cout << " [x] Awaiting RPC requests" << std::endl;
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for (;;)
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{
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amqp_maybe_release_buffers(conn);
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amqp_envelope_t envelope;
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amqp_rpc_reply_t res = amqp_consume_message(conn, &envelope, nullptr, 0);
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int n = *(int *)envelope.message.body.bytes;
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std::cout << " [.] fib(" << n << ")" << std::endl;
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int response = fib(n);
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amqp_bytes_t response_;
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response_.bytes = &response;
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response_.len = sizeof(response);
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amqp_basic_properties_t props;
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props._flags = AMQP_BASIC_CORRELATION_ID_FLAG;
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props.correlation_id = envelope.message.properties.correlation_id;
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amqp_channel_t replyChannel = envelope.channel;
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amqp_basic_publish(conn, replyChannel, amqp_empty_bytes, /* routing key*/ envelope.message.properties.reply_to, false, false, &props, response_);
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amqp_basic_ack(conn, replyChannel, envelope.delivery_tag, false);
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amqp_destroy_envelope(&envelope);
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}
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amqp_channel_close(conn, KChannel, AMQP_REPLY_SUCCESS);
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amqp_connection_close(conn, AMQP_REPLY_SUCCESS);
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amqp_destroy_connection(conn);
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return 0;
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}
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