Manual Pages for UNIX Operating System command usage for man ldap_memcache_set

LDAP Library Functions                       ldap_memcache(3LDAP)



NAME
     ldap_memcache,    ldap_memcache_init,     ldap_memcache_set,
     ldap_memcache_get,                      ldap_memcache_flush,
     ldap_memcache_destroy, ldap_memcache_update  -  LDAP  client
     caching functions

SYNOPSIS
     cc -flag ... file...-lldap [ -library ... ]
     #include 

     int ldap_memcache_init(unsigned long ttl, unsigned long size,
          char **baseDNs,struct ldap_thread_fns *thread_fns,
          LDAPMemCache **cachep


     int ldap_memcache_set(LDAP *ld, LDAPMemCache **cache


     int ldap_memcache_get(LDAP *ld, LDAPMemCache **cachep


     void ldap_memcache_flush(LDAPMemCache *cache, char *dn, int scope


     void ldap_memcache_destroy(LDAPMemCache *cache


     void ldap_memcache_update(LDAPMemCache *cache


DESCRIPTION
     Use the ldap_memcache functions  to  maintain  an  in-memory
     client side cache to store search requests. Caching improves
     performance and reduces  network  bandwidth  when  a  client
     makes  repeated  requests. The cache uses search criteria as
     the key to the cached items. When you send a search request,
     the  cache  checks  the search criteria to determine if that
     request has been previously stored  .  If  the  request  was
     stored, the search results are read from the cache.


     Make a call to ldap_memcache_init() to create the  in-memory
     client  side cache. The function passes back a pointer to an
     LDAPMemCache structure, which represents the cache.  Make  a
     call  to  the ldap_memcache_set() function to associate this
     cache with an LDAP connection handle, an LDAP structure. ttl
     is the the maximum  amount of time (in seconds) that an item
     can be cached. If a ttl value  of 0 is passed, there  is  no
     limit  to  the  amount  of time that an item  can be cached.
     size is the maximum amount of memory  (in  bytes)  that  the
     cache will consume. A zero value of size means the cache has
     no size limit. baseDNS is an array of the  base  DN  strings



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LDAP Library Functions                       ldap_memcache(3LDAP)



     representing   the  base DNs of the search requests you want
     cached. If baseDNS is not NULL,  only  the  search  requests
     with  the  specified  base DNs will be cached. If baseDNS is
     NULL,  all search requests are cached. The thread_fns param-
     eter takes an ldap_thread_fns structure specifying the func-
     tions that you  want  used  to  ensure  that  the  cache  is
     thread-safe.  You  should  specify this if you have multiple
     threads that are using the same connection handle and cache.
     If  you  are  not using multiple threads, pass NULL for this
     parameter.


     ldap_memcache_set() associates an in-memory cache  that  you
     have  already   created  by calling the ldap_memcache_init()
     function with an LDAP connection handle.  The  ld  parameter
     should   be   the   result   of   a   successful   call   to
     ldap_open(3LDAP). The cache parameter should be  the  result
     of  a  cache created by the ldap_memcache_init() call. After
     you call this function, search requests made over the speci-
     fied  LDAP  connection  will use this cache. To disassociate
     the cache from the LDAP connection handle, make  a  call  to
     the  ldap_bind(3LDAP)  or  ldap_bind(3LDAP) function. Make a
     call to ldap_memcache_set() if  you  want  to  associate   a
     cache  with  multiple  LDAP connection handles. For example,
     call  the ldap_memcache_get()  function  to  get  the  cache
     associated with one connection, then you can call this func-
     tion and associate the cache with another connection.


     The ldap_memcache_get() function gets the  cache  associated
     with  the specified connection handle (LDAP structure). This
     cache is used by all search  requests made through that con-
     nection.  When you call this function, the function sets the
     cachep parameter as a pointer to the LDAPMemCache  structure
     that is associated with the connection handle.


     ldap_memcache_flush()  flushes  search  requests  from   the
     cache.  If  the  base  DN  of a search request is within the
     scope specified by the dn and scope  arguments,  the  search
     request  is  flushed  from the cache. If no DN is specified,
     the entire cache is flushed. The scope parameter, along with
     the  dn  parameter,  identifies the search requests that you
     want flushed from the cache. This argument can have  one  of
     the following values:
       LDAP_SCOPE_BASE
       LDAP_SCOPE_ONELEVEL
       LDAP_SCOPE_SUBTREE


     ldap_memcache_destroy()  frees  the  specified  LDAPMemCache
     structure  pointed  to  by  cache  from  memory.  Call  this



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LDAP Library Functions                       ldap_memcache(3LDAP)



     function after you are done working with a cache.


     ldap_memcache_update() checks the cache for items that  have
     expired   and  removes them. This check is typically done as
     part of the way the cache normally works. You do not need to
     call  this  function unless you  want to update the cache at
     this point in time. This function is only  useful in a  mul-
     tithreaded  application,  since it will not return until the
     cache is destroyed.

PARAMETERS
     ttl           The maximum amount of time (in  seconds)  that
                   an item can be cached


     size          The maximum amount of memory (in bytes)   that
                   the cache will consume.


     baseDNs       An array of the base DN  strings  representing
                   the  base  DNs of the search requests you want
                   cached


     thread_fns    A pointer  to  the  ldap_thread_fns  structure
                   structure.


     cachep        A pointer to the LDAPMemCache structure


     cache         The  result  of  a  cache   created   by   the
                   ldap_memcache_init() call


     ld            The   result   of   a   successful   call   to
                   ldap_open(3LDAP)


     dn            The search requests that you want flushed from
                   the cache


     scope         The search requests that you want flushed from
                   the cache


ERRORS
     The  functions  that   have   int   return   values   return
     LDAP_SUCCESS  if  the  operation  was successful. Otherwise,
     they return another LDAP error code.  See  ldap_error(3LDAP)



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LDAP Library Functions                       ldap_memcache(3LDAP)



     for a list of the LDAP error codes.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | system/library (32-bit)     |
    |_____________________________|_____________________________|
    |                             | SUNWcslx (64-bit)           |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|


SEE ALSO
     ldap_error(3LDAP),   ldap_open(3LDAP),   ldap_search(3LDAP),
     attributes(5)

































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