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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* @file mod_serf.h
* @brief Serf Interfaces
*
*/
#include "httpd.h"
#include "http_config.h"
#if !defined(WIN32) && !defined(NETWARE)
#include "ap_config_auto.h"
#endif
#ifdef HAVE_SERF
#include "serf.h"
#endif
#include "ap_provider.h"
#ifndef _MOD_SERF_H_
#define _MOD_SERF_H_
/**
* @addtogroup Serf_cluster_provider
* @{
*/
#define AP_SERF_CLUSTER_PROVIDER "serf_cluster"
typedef struct ap_serf_server_t ap_serf_server_t;
struct ap_serf_server_t {
/* TODO: consider using apr_sockaddr_t, except they suck. */
const char *ip;
apr_port_t port;
};
typedef struct ap_serf_cluster_provider_t ap_serf_cluster_provider_t;
struct ap_serf_cluster_provider_t {
/**
* Human readable name of this provider, used in configuration.
*/
const char *name;
/**
* Baton passed to all methods in this provider.
*
* This field may be NULL.
*/
void *baton;
/**
* Check that the key/value pairs used to configure the
* cluster are valid.
*
* Return non-NULL on failure with an error message, like standard httpd
* configuration directives.
*
* This field must be set.
*/
const char* (*check_config)(void *baton,
cmd_parms *cmd,
apr_table_t *params);
/**
* Provide an ordered array of ap_serf_server_t in the order that
* mod_serf should attempt to use them. If a server on the list
* is known to be not responding, it may be skipped. If mod_serf is
* unable to contact any of the servers, a 502 will be returned to the
* client.
*
* Returns OK on success, all other return codes will result in a 500.
*
* This field must be set.
*/
int (*list_servers)(void *baton,
request_rec *r,
apr_table_t *params,
apr_array_header_t **servers);
/**
* If a request was successfully fulfilled by this address, feedback will
* be given to the provider, so it may make better recommendations.
*
* This field may be NULL.
*/
void (*server_success)(void *baton, request_rec *r, apr_table_t *params,
ap_serf_server_t* server);
/**
* If a request failed to be fulfilled by this address, feedback will
* be given to the provider, so it may make better recommendations.
*
* This field may be NULL.
*/
void (*server_failure)(void *baton, request_rec *r, apr_table_t *params,
ap_serf_server_t* server);
};
/** @} */
#endif /* _MOD_SERF_H_ */
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