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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_FILTERS_LOAD_REPORTING_LOAD_REPORTING_H
#define GRPC_CORE_EXT_FILTERS_LOAD_REPORTING_LOAD_REPORTING_H
#include <grpc/impl/codegen/grpc_types.h>
#include "src/core/lib/channel/channel_stack.h"
/** Identifiers for the invocation point of the users LR callback */
typedef enum grpc_load_reporting_source {
GRPC_LR_POINT_UNKNOWN = 0,
GRPC_LR_POINT_CHANNEL_CREATION,
GRPC_LR_POINT_CHANNEL_DESTRUCTION,
GRPC_LR_POINT_CALL_CREATION,
GRPC_LR_POINT_CALL_DESTRUCTION
} grpc_load_reporting_source;
/** Call information to be passed to the provided LR callback. */
typedef struct grpc_load_reporting_call_data {
const grpc_load_reporting_source source; /**< point of last data update. */
/** Unique identifier for the channel associated with the data */
intptr_t channel_id;
/** Unique identifier for the call associated with the data. If the call
* hasn't been created yet, it'll have a value of zero. */
intptr_t call_id;
/** Only valid when \a source is \a GRPC_LR_POINT_CALL_DESTRUCTION, that is,
* once the call has completed */
const grpc_call_final_info *final_info;
const char *initial_md_string; /**< value string for LR's initial md key */
const char *trailing_md_string; /**< value string for LR's trailing md key */
const char *method_name; /**< Corresponds to :path header */
} grpc_load_reporting_call_data;
/** Return a \a grpc_arg enabling load reporting */
grpc_arg grpc_load_reporting_enable_arg();
#endif /* GRPC_CORE_EXT_FILTERS_LOAD_REPORTING_LOAD_REPORTING_H */
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