From cbdfbe5cbb83400630c95cfe54eac52a12105d7a Mon Sep 17 00:00:00 2001 From: "William A. Rowe Jr" Date: Wed, 11 Aug 2004 21:20:07 +0000 Subject: [PATCH] Add initial structures for connection pool and load balancer. Submitted by: mturk git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104566 13f79535-47bb-0310-9956-ffa450edef68 --- modules/proxy/mod_proxy.h | 64 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 62 insertions(+), 2 deletions(-) diff --git a/modules/proxy/mod_proxy.h b/modules/proxy/mod_proxy.h index 4ff5f1c8dc..e973b966ab 100644 --- a/modules/proxy/mod_proxy.h +++ b/modules/proxy/mod_proxy.h @@ -51,6 +51,7 @@ #include "apr_date.h" #include "apr_strmatch.h" #include "apr_fnmatch.h" +#include "apr_reslist.h" #define APR_WANT_STRFUNC #include "apr_want.h" @@ -99,8 +100,8 @@ struct proxy_remote { }; struct proxy_alias { - const char *real; - const char *fake; + const char *real; + const char *fake; }; struct dirconn_entry { @@ -123,6 +124,8 @@ typedef struct { apr_array_header_t *noproxies; apr_array_header_t *dirconn; apr_array_header_t *allowed_connect_ports; + apr_array_header_t *workers; + apr_array_header_t *balancers; const char *domain; /* domain name to use in absence of a domain name in the request */ int req; /* true if proxy requests are enabled */ char req_set; @@ -188,6 +191,60 @@ typedef struct { int content_length; /* length of the content */ } proxy_completion; +/* Physical connection to the backend server */ +typedef struct { + apr_pool_t *pool; /* Subpool used for creating socket */ + apr_socket_t *sock; + int close; /* Close 'this' connection */ +} proxy_conn; + +/* Connection pool */ +typedef struct { + apr_pool_t *pool; /* The pool used in constructor and destructor calls */ + apr_sockaddr_t *addr; /* Preparsed remote address info */ + int min; /* Desired minimum number of available connections */ + int smax; /* Soft maximum on the total number of connections */ + int hmax; /* Hard maximum on the total number of connections */ +#if APR_HAS_THREADS + apr_reslist_t *res; /* Connection resource list */ +#else + proxy_conn *conn; /* Single connection for prefork mpm's */ +#endif +} proxy_conn_pool; + +/* Worker configuration */ +typedef struct { + int status; + apr_time_t error_time; /* time of the last error */ + apr_interval_time_t retry; /* retry interval */ + int retries; /* number of retries on this worker */ + int lbfactor; /* initial load balancing factor */ + const char *scheme; /* scheme to use ajp|http|https */ + const char *hostname; /* remote backend address */ + apr_port_t port; + proxy_conn_pool *cp; /* Connection pool to use */ + void *opaque; /* per scheme worker data */ +} proxy_worker; + +/* Runtime worker status informations. Shared in scoreboard */ +typedef struct { + proxy_worker *w; + double lbfactor; /* dynamic lbfactor */ + double lbsatus; /* Current lbstatus */ + apr_size_t transfered; /* Number of bytes transfered to remote */ + apr_size_t readed; /* Number of bytes readed from remote */ +} proxy_runtime_worker; + +struct proxy_balancer { + apr_array_header_t *workers; /* array of proxy_runtime_workers */ + const char *name; /* name of the load balancer */ + const char *sticky; /* sticky session identifier */ + int sticky_force; /* Disable failover for sticky sessions */ + apr_interval_time_t timeout; /* Timeout for waiting on free connection */ +#if APR_HAS_THREADS + apr_thread_mutex_t *mutex; /* Thread lock for updating lb params */ +#endif +}; /* hooks */ @@ -255,6 +312,9 @@ PROXY_DECLARE(int) ap_proxy_connect_to_backend(apr_socket_t **, const char *, ap PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c); PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c); +/* Connection pool API */ + + /* For proxy_util */ extern module PROXY_DECLARE_DATA proxy_module; -- 2.50.1