sciop_endpoint.cpp

来自「这是广泛使用的通信开源项目,对于大容量,高并发的通讯要求完全能够胜任,他广泛可用」· C++ 代码 · 共 250 行

#include "SCIOP_Endpoint.h"

#if TAO_HAS_SCIOP == 1

#include "tao/debug.h"
#include "ace/Synch_T.h"
#include "tao/ORB_Constants.h"

ACE_RCSID (tao,
           IIOP_Endpoint,
           "SCIOP_Endpoint.cpp,v 1.7 2003/12/26 01:02:09 bala Exp")


#if !defined (__ACE_INLINE__)
# include "SCIOP_Endpoint.i"
#endif /* __ACE_INLINE__ */


TAO_SCIOP_Endpoint::TAO_SCIOP_Endpoint (const ACE_INET_Addr &addr,
                                      int use_dotted_decimal_addresses)
  : TAO_Endpoint (TAO_TAG_SCIOP_PROFILE)
    , host_ ()
    , port_ (683)  // default port (IANA assigned)
    , object_addr_ (addr)
    , object_addr_set_ (0)
    , next_ (0)
{
  this->set (addr, use_dotted_decimal_addresses);
}

TAO_SCIOP_Endpoint::TAO_SCIOP_Endpoint (const char *host,
                                        CORBA::UShort port,
                                        const ACE_INET_Addr &addr,
                                        CORBA::Short priority)
  : TAO_Endpoint (TAO_TAG_SCIOP_PROFILE,
                  priority)
    , host_ ()
    , port_ (port)
    , object_addr_ (addr)
    , object_addr_set_ (0)
    , next_ (0)
{
  if (host != 0)
    this->host_ = host;
}

TAO_SCIOP_Endpoint::TAO_SCIOP_Endpoint (void)
  : TAO_Endpoint (TAO_TAG_SCIOP_PROFILE)
    , host_ ()
    , port_ (683)  // default port (IANA assigned)
    , object_addr_ ()
    , object_addr_set_ (0)
    , next_ (0)
{
}

TAO_SCIOP_Endpoint::TAO_SCIOP_Endpoint (const char *host,
                                      CORBA::UShort port,
                                      CORBA::Short priority)
  : TAO_Endpoint (TAO_TAG_SCIOP_PROFILE)
    , host_ ()
    , port_ (port)
    , object_addr_ ()
    , object_addr_set_ (0)
    , next_ (0)
{
  if (host != 0)
    this->host_ = host;

  this->priority (priority);
}

TAO_SCIOP_Endpoint::~TAO_SCIOP_Endpoint (void)
{
}

int
TAO_SCIOP_Endpoint::set (const ACE_INET_Addr &addr,
                        int use_dotted_decimal_addresses)
{
  char tmp_host[MAXHOSTNAMELEN + 1];

  if (use_dotted_decimal_addresses
      || addr.get_host_name (tmp_host, sizeof (tmp_host)) != 0)
    {
      const char *tmp = addr.get_host_addr ();
      if (tmp == 0)
        {
          if (TAO_debug_level > 0)
            ACE_DEBUG ((LM_DEBUG,
                        ACE_TEXT ("\n\nTAO (%P|%t) ")
                        ACE_TEXT ("SCIOP_Endpoint::set ")
                        ACE_TEXT ("- %p\n\n"),
                        ACE_TEXT ("cannot determine hostname")));
          return -1;
        }
      else
        this->host_ = tmp;
    }
  else
    this->host_ = CORBA::string_dup (tmp_host);

  this->port_ = addr.get_port_number();

  return 0;
}

int
TAO_SCIOP_Endpoint::addr_to_string (char *buffer, size_t length)
{
  size_t actual_len =
    ACE_OS::strlen (this->host_.in ()) // chars in host name
    + sizeof (':')                     // delimiter
    + ACE_OS::strlen ("65536")         // max port
    + sizeof ('\0');

  if (length < actual_len)
    return -1;

  ACE_OS::sprintf (buffer, "%s:%d",
                   this->host_.in (), this->port_);

  return 0;
}

const char *
TAO_SCIOP_Endpoint::host (const char *h)
{
  this->host_ = h;

  return this->host_.in ();
}

TAO_Endpoint *
TAO_SCIOP_Endpoint::next (void)
{
  return this->next_;
}

TAO_Endpoint *
TAO_SCIOP_Endpoint::duplicate (void)
{
  TAO_SCIOP_Endpoint *endpoint = 0;

  ACE_NEW_RETURN (endpoint,
                  TAO_SCIOP_Endpoint (this->host_.in (),
                                      this->port_,
                                      this->object_addr_,
                                      this->priority ()),
                  0);

  return endpoint;
}

CORBA::Boolean
TAO_SCIOP_Endpoint::is_equivalent (const TAO_Endpoint *other_endpoint)
{
  TAO_Endpoint *endpt =
    ACE_const_cast (TAO_Endpoint *, other_endpoint);

  TAO_SCIOP_Endpoint *endpoint =
    ACE_dynamic_cast (TAO_SCIOP_Endpoint *, endpt);
  if (endpoint == 0)
    return 0;

  return (this->port_ == endpoint->port_
          && (ACE_OS::strcmp(this->host(), endpoint->host()) == 0));
}

CORBA::ULong
TAO_SCIOP_Endpoint::hash (void)
{
  if (this->hash_val_ != 0)
    return this->hash_val_;

  {
    ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
                      guard,
                      this->addr_lookup_lock_,
                      this->hash_val_);
    // .. DCL
    if (this->hash_val_ != 0)
      return this->hash_val_;

    // A few comments about this optimization. The call below will
    // deadlock if the object_addr_set is false. If you don't belive

    if (!this->object_addr_set_)
      {
        // Set the object_addr first
        (void) this->object_addr_i ();
      }

    this->hash_val_ =
      this->object_addr_.get_ip_address () + this->port ();
  }

  return this->hash_val_;
}

const ACE_INET_Addr &
TAO_SCIOP_Endpoint::object_addr (void) const
{
  // The object_addr_ is initialized here, rather than at IOR decode
  // time for several reasons:
  //   1. A request on the object may never be invoked.
  //   2. The DNS setup may have changed dynamically.
  //   ...etc..

  // Double checked locking optimization.
  if (!this->object_addr_set_)
    {
      ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
                        guard,
                        this->addr_lookup_lock_,
                        this->object_addr_);

      if (!this->object_addr_set_)
        {
          (void) this->object_addr_i ();
        }
    }

  return this->object_addr_;
}

void
TAO_SCIOP_Endpoint::object_addr_i (void) const
{
  if (this->object_addr_.set (this->port_,
                              this->host_.in ()) == -1)
    {
      // If this call fails, it most likely due a hostname
      // lookup failure caused by a DNS misconfiguration.  If
      // a request is made to the object at the given host and
      // port, then a CORBA::TRANSIENT() exception should be
      // thrown.

      // Invalidate the ACE_INET_Addr.  This is used as a flag
      // to denote that ACE_INET_Addr initialization failed.
      this->object_addr_.set_type (-1);
    }
  else
    {
      this->object_addr_set_ = true;
    }
}

#endif /* TAO_HAS_SCIOP == 1 */