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/*
*
* Copyright 2016, 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.
*
*/
#ifndef GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
#define GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
#include <grpc/slice_buffer.h>
#include "src/core/ext/client_channel/lb_policy_factory.h"
#include "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h"
#ifdef __cplusplus
extern "C" {
#endif
#define GRPC_GRPCLB_SERVICE_NAME_MAX_LENGTH 128
typedef grpc_lb_v1_Server_ip_address_t grpc_grpclb_ip_address;
typedef grpc_lb_v1_LoadBalanceRequest grpc_grpclb_request;
typedef grpc_lb_v1_InitialLoadBalanceResponse grpc_grpclb_initial_response;
typedef grpc_lb_v1_Server grpc_grpclb_server;
typedef grpc_lb_v1_Duration grpc_grpclb_duration;
typedef struct grpc_grpclb_serverlist {
grpc_grpclb_server **servers;
size_t num_servers;
grpc_grpclb_duration expiration_interval;
} grpc_grpclb_serverlist;
/** Create a request for a gRPC LB service under \a lb_service_name */
grpc_grpclb_request *grpc_grpclb_request_create(const char *lb_service_name);
/** Protocol Buffers v3-encode \a request */
grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request);
/** Destroy \a request */
void grpc_grpclb_request_destroy(grpc_grpclb_request *request);
/** Parse (ie, decode) the bytes in \a encoded_grpc_grpclb_response as a \a
* grpc_grpclb_initial_response */
grpc_grpclb_initial_response *grpc_grpclb_initial_response_parse(
grpc_slice encoded_grpc_grpclb_response);
/** Parse the list of servers from an encoded \a grpc_grpclb_response */
grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
grpc_slice encoded_grpc_grpclb_response);
/** Return a copy of \a sl. The caller is responsible for calling \a
* grpc_grpclb_destroy_serverlist on the returned copy. */
grpc_grpclb_serverlist *grpc_grpclb_serverlist_copy(
const grpc_grpclb_serverlist *sl);
bool grpc_grpclb_serverlist_equals(const grpc_grpclb_serverlist *lhs,
const grpc_grpclb_serverlist *rhs);
bool grpc_grpclb_server_equals(const grpc_grpclb_server *lhs,
const grpc_grpclb_server *rhs);
/** Destroy \a serverlist */
void grpc_grpclb_destroy_serverlist(grpc_grpclb_serverlist *serverlist);
/** Compare \a lhs against \a rhs and return 0 if \a lhs and \a rhs are equal,
* < 0 if \a lhs represents a duration shorter than \a rhs and > 0 otherwise */
int grpc_grpclb_duration_compare(const grpc_grpclb_duration *lhs,
const grpc_grpclb_duration *rhs);
/** Destroy \a initial_response */
void grpc_grpclb_initial_response_destroy(
grpc_grpclb_initial_response *response);
#ifdef __cplusplus
}
#endif
#endif /* GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H */
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