C++ (Cpp) gpr_backoff_init Examples

Example #1

File: dns_resolver.c Project: izouxv/grpc

static grpc_resolver *dns_create(grpc_resolver_args *args,
                                 const char *default_port) {
  if (0 != strcmp(args->uri->authority, "")) {
    gpr_log(GPR_ERROR, "authority based dns uri's not supported");
    return NULL;
  }
  // Get name from args.
  const char *path = args->uri->path;
  if (path[0] == '/') ++path;
  // Get proxy name, if any.
  char *proxy_name = grpc_get_http_proxy_server();
  // Create resolver.
  dns_resolver *r = gpr_malloc(sizeof(dns_resolver));
  memset(r, 0, sizeof(*r));
  gpr_mu_init(&r->mu);
  grpc_resolver_init(&r->base, &dns_resolver_vtable);
  r->name_to_resolve = proxy_name == NULL ? gpr_strdup(path) : proxy_name;
  r->default_port = gpr_strdup(default_port);
  r->channel_args = grpc_channel_args_copy(args->args);
  gpr_backoff_init(&r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS,
                   GRPC_DNS_RECONNECT_BACKOFF_MULTIPLIER,
                   GRPC_DNS_RECONNECT_JITTER,
                   GRPC_DNS_MIN_CONNECT_TIMEOUT_SECONDS * 1000,
                   GRPC_DNS_RECONNECT_MAX_BACKOFF_SECONDS * 1000);
  return &r->base;
}

Example #2

File: dns_resolver.c Project: wuyunhao/grpc

static grpc_resolver *dns_create(grpc_resolver_args *args,
                                 const char *default_port,
                                 const char *lb_policy_name) {
  if (0 != strcmp(args->uri->authority, "")) {
    gpr_log(GPR_ERROR, "authority based dns uri's not supported");
    return NULL;
  }
  // Get name from args.
  const char *path = args->uri->path;
  if (path[0] == '/') ++path;
  // Get proxy name, if any.
  char *proxy_name = grpc_get_http_proxy_server();
  // Create resolver.
  dns_resolver *r = gpr_malloc(sizeof(dns_resolver));
  memset(r, 0, sizeof(*r));
  gpr_ref_init(&r->refs, 1);
  gpr_mu_init(&r->mu);
  grpc_resolver_init(&r->base, &dns_resolver_vtable);
  r->target_name = gpr_strdup(path);
  r->name_to_resolve = proxy_name == NULL ? gpr_strdup(path) : proxy_name;
  r->default_port = gpr_strdup(default_port);
  gpr_backoff_init(&r->backoff_state, BACKOFF_MULTIPLIER, BACKOFF_JITTER,
                   BACKOFF_MIN_SECONDS * 1000, BACKOFF_MAX_SECONDS * 1000);
  r->lb_policy_name = gpr_strdup(lb_policy_name);
  return &r->base;
}

Example #3

File: backoff_test.c Project: CoderRookie/grpc

static void test_constant_backoff(void) {
  gpr_backoff backoff;
  gpr_backoff_init(&backoff, 1.0, 0.0, 1000, 1000);

  gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
  gpr_timespec next = gpr_backoff_begin(&backoff, now);
  GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000);
  for (int i = 0; i < 10000; i++) {
    next = gpr_backoff_step(&backoff, now);
    GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000);
    now = next;
  }
}

Example #4

File: backoff_test.c Project: CoderRookie/grpc

static void test_no_jitter_backoff(void) {
  gpr_backoff backoff;
  gpr_backoff_init(&backoff, 2.0, 0.0, 1, 513);

  gpr_timespec now = gpr_time_0(GPR_TIMESPAN);
  gpr_timespec next = gpr_backoff_begin(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(3, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(7, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(15, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(31, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(63, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(127, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(255, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(511, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1023, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1536, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2049, GPR_TIMESPAN), next) == 0);
  now = next;
  next = gpr_backoff_step(&backoff, now);
  GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2562, GPR_TIMESPAN), next) == 0);
}