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/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.h"
#include <grpc/support/alloc.h>
#include <grpc/support/atm.h>
#include <grpc/support/sync.h>
#include <grpc/support/useful.h>
#include "src/core/lib/channel/channel_args.h"
#define GRPC_ARG_GRPCLB_CLIENT_STATS "grpc.grpclb_client_stats"
struct grpc_grpclb_client_stats {
gpr_refcount refs;
gpr_atm num_calls_started;
gpr_atm num_calls_finished;
gpr_atm num_calls_finished_with_drop_for_rate_limiting;
gpr_atm num_calls_finished_with_drop_for_load_balancing;
gpr_atm num_calls_finished_with_client_failed_to_send;
gpr_atm num_calls_finished_known_received;
};
grpc_grpclb_client_stats* grpc_grpclb_client_stats_create() {
grpc_grpclb_client_stats* client_stats = gpr_zalloc(sizeof(*client_stats));
gpr_ref_init(&client_stats->refs, 1);
return client_stats;
}
grpc_grpclb_client_stats* grpc_grpclb_client_stats_ref(
grpc_grpclb_client_stats* client_stats) {
gpr_ref(&client_stats->refs);
return client_stats;
}
void grpc_grpclb_client_stats_unref(grpc_grpclb_client_stats* client_stats) {
if (gpr_unref(&client_stats->refs)) {
gpr_free(client_stats);
}
}
void grpc_grpclb_client_stats_add_call_started(
grpc_grpclb_client_stats* client_stats) {
gpr_atm_full_fetch_add(&client_stats->num_calls_started, (gpr_atm)1);
}
void grpc_grpclb_client_stats_add_call_finished(
bool finished_with_drop_for_rate_limiting,
bool finished_with_drop_for_load_balancing,
bool finished_with_client_failed_to_send, bool finished_known_received,
grpc_grpclb_client_stats* client_stats) {
gpr_atm_full_fetch_add(&client_stats->num_calls_finished, (gpr_atm)1);
if (finished_with_drop_for_rate_limiting) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_drop_for_rate_limiting,
(gpr_atm)1);
}
if (finished_with_drop_for_load_balancing) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_drop_for_load_balancing,
(gpr_atm)1);
}
if (finished_with_client_failed_to_send) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_client_failed_to_send,
(gpr_atm)1);
}
if (finished_known_received) {
gpr_atm_full_fetch_add(&client_stats->num_calls_finished_known_received,
(gpr_atm)1);
}
}
static void atomic_get_and_reset_counter(int64_t* value, gpr_atm* counter) {
*value = (int64_t)gpr_atm_acq_load(counter);
gpr_atm_full_fetch_add(counter, (gpr_atm)(-*value));
}
void grpc_grpclb_client_stats_get(
grpc_grpclb_client_stats* client_stats, int64_t* num_calls_started,
int64_t* num_calls_finished,
int64_t* num_calls_finished_with_drop_for_rate_limiting,
int64_t* num_calls_finished_with_drop_for_load_balancing,
int64_t* num_calls_finished_with_client_failed_to_send,
int64_t* num_calls_finished_known_received) {
atomic_get_and_reset_counter(num_calls_started,
&client_stats->num_calls_started);
atomic_get_and_reset_counter(num_calls_finished,
&client_stats->num_calls_finished);
atomic_get_and_reset_counter(
num_calls_finished_with_drop_for_rate_limiting,
&client_stats->num_calls_finished_with_drop_for_rate_limiting);
atomic_get_and_reset_counter(
num_calls_finished_with_drop_for_load_balancing,
&client_stats->num_calls_finished_with_drop_for_load_balancing);
atomic_get_and_reset_counter(
num_calls_finished_with_client_failed_to_send,
&client_stats->num_calls_finished_with_client_failed_to_send);
atomic_get_and_reset_counter(
num_calls_finished_known_received,
&client_stats->num_calls_finished_known_received);
}
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