/* * * Copyright 2015 gRPC authors. * * 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 "test/core/util/reconnect_server.h" #include #include "absl/strings/string_view.h" #include #include #include #include #include "src/core/lib/iomgr/endpoint.h" #include "src/core/lib/iomgr/error.h" #include "src/core/lib/iomgr/iomgr_fwd.h" #include "src/core/lib/iomgr/tcp_server.h" #include "test/core/util/test_tcp_server.h" static void pretty_print_backoffs(reconnect_server* server) { gpr_timespec diff; int i = 1; double expected_backoff = 1000.0, backoff; timestamp_list* head = server->head; gpr_log(GPR_INFO, "reconnect server: new connection"); for (head = server->head; head && head->next; head = head->next, i++) { diff = gpr_time_sub(head->next->timestamp, head->timestamp); backoff = gpr_time_to_millis(diff); gpr_log(GPR_INFO, "retry %2d:backoff %6.2fs,expected backoff %6.2fs, jitter %4.2f%%", i, backoff / 1000.0, expected_backoff / 1000.0, (backoff - expected_backoff) * 100.0 / expected_backoff); expected_backoff *= 1.6; int max_reconnect_backoff_ms = 120 * 1000; if (server->max_reconnect_backoff_ms > 0) { max_reconnect_backoff_ms = server->max_reconnect_backoff_ms; } if (expected_backoff > max_reconnect_backoff_ms) { expected_backoff = max_reconnect_backoff_ms; } } } static void on_connect(void* arg, grpc_endpoint* tcp, grpc_pollset* /*accepting_pollset*/, grpc_tcp_server_acceptor* acceptor) { gpr_free(acceptor); absl::string_view peer; absl::string_view::size_type last_colon; reconnect_server* server = static_cast(arg); gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME); timestamp_list* new_tail; peer = grpc_endpoint_get_peer(tcp); grpc_endpoint_shutdown(tcp, GRPC_ERROR_CREATE("Connected")); grpc_endpoint_destroy(tcp); last_colon = peer.rfind(':'); if (server->peer == nullptr) { server->peer = new std::string(peer); } else { if (last_colon == std::string::npos) { gpr_log(GPR_ERROR, "peer does not contain a ':'"); } else if (peer.compare(0, static_cast(last_colon), *server->peer) != 0) { gpr_log(GPR_ERROR, "mismatched peer! %s vs %s", server->peer->c_str(), std::string(peer).c_str()); } } new_tail = static_cast(gpr_malloc(sizeof(timestamp_list))); new_tail->timestamp = now; new_tail->next = nullptr; if (server->tail == nullptr) { server->head = new_tail; server->tail = new_tail; } else { server->tail->next = new_tail; server->tail = new_tail; } pretty_print_backoffs(server); } void reconnect_server_init(reconnect_server* server) { test_tcp_server_init(&server->tcp_server, on_connect, server); server->head = nullptr; server->tail = nullptr; server->peer = nullptr; server->max_reconnect_backoff_ms = 0; } void reconnect_server_start(reconnect_server* server, int port) { test_tcp_server_start(&server->tcp_server, port); } void reconnect_server_poll(reconnect_server* server, int seconds) { test_tcp_server_poll(&server->tcp_server, 1000 * seconds); } void reconnect_server_clear_timestamps(reconnect_server* server) { timestamp_list* new_head = server->head; while (server->head) { new_head = server->head->next; gpr_free(server->head); server->head = new_head; } server->tail = nullptr; delete server->peer; server->peer = nullptr; } void reconnect_server_destroy(reconnect_server* server) { reconnect_server_clear_timestamps(server); test_tcp_server_destroy(&server->tcp_server); }