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// $Id: Logging_Handler.cpp 91670 2010-09-08 18:02:26Z johnnyw $
#include "ace/Log_Msg.h"
#include "ace/Message_Block.h"
#include "ace/Log_Record.h"
#include "ace/OS_NS_string.h"
#include "ace/CDR_Stream.h"
#include "ace/Auto_Ptr.h"
#include "Logging_Handler.h"
#include "Reactor_Singleton.h"
// Default constructor.
Logging_Handler::Logging_Handler (void)
{
}
Logging_Handler::~Logging_Handler (void)
{
// Make sure there are no timers.
REACTOR::instance ()->cancel_timer (this);
this->cli_stream_.close ();
}
// Extract the underlying ACE_SOCK_Stream (e.g., for purposes of
// accept()).
ACE_SOCK_Stream &
Logging_Handler::peer (void)
{
return this->cli_stream_;
}
int
Logging_Handler::handle_timeout (const ACE_Time_Value &,
const void *arg)
{
#if defined (ACE_NDEBUG)
ACE_UNUSED_ARG (arg);
#endif /* ACE_NDEBUG */
ACE_ASSERT (arg == this);
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%P|%t) handling timeout from this = %@\n"),
this));
return 0;
}
// Perform the logging record receive.
int
Logging_Handler::handle_input (ACE_HANDLE)
{
ACE_Log_Record log_record;
// We need to use the old two-read trick here since TCP sockets
// don't support framing natively. Allocate a message block for the
// payload; initially at least large enough to hold the header, but
// needs some room for alignment.
ACE_Message_Block *payload_p = 0;
ACE_Message_Block *header_p = 0;
ACE_NEW_RETURN (header_p,
ACE_Message_Block (ACE_DEFAULT_CDR_BUFSIZE),
-1);
auto_ptr <ACE_Message_Block> header (header_p);
// Align the Message Block for a CDR stream
ACE_CDR::mb_align (header.get ());
ACE_CDR::Boolean byte_order;
ACE_CDR::ULong length;
ssize_t count = ACE::recv_n (this->peer ().get_handle (),
header->wr_ptr (),
8);
switch (count)
{
// Handle shutdown and error cases.
default:
case -1:
case 0:
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("server logging daemon closing down\n")));
return -1;
/* NOTREACHED */
case 8:
// Just fall through in this case..
break;
}
header->wr_ptr (8); // Reflect addition of 8 bytes.
// Create a CDR stream to parse the 8-byte header.
ACE_InputCDR header_cdr (header.get ());
// Extract the byte-order and use helper methods to disambiguate
// octet, booleans, and chars.
header_cdr >> ACE_InputCDR::to_boolean (byte_order);
// Set the byte-order on the stream...
header_cdr.reset_byte_order (byte_order);
// Extract the length
header_cdr >> length;
ACE_NEW_RETURN (payload_p,
ACE_Message_Block (length),
-1);
auto_ptr <ACE_Message_Block> payload (payload_p);
// Ensure there's sufficient room for log record payload.
ACE_CDR::grow (payload.get (), 8 + ACE_CDR::MAX_ALIGNMENT + length);
// Use <recv_n> to obtain the contents.
if (ACE::recv_n (this->peer ().get_handle (),
payload->wr_ptr (),
length) <= 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("recv_n()")));
return -1;
}
payload->wr_ptr (length); // Reflect additional bytes
ACE_InputCDR payload_cdr (payload.get ());
payload_cdr.reset_byte_order (byte_order);
payload_cdr >> log_record; // Finally extract the <ACE_log_record>.
log_record.length (length);
log_record.print (ACE_TEXT_CHAR_TO_TCHAR (this->host_name_), 1, stderr);
return 0;
}
// Extract underlying device descriptor.
ACE_HANDLE
Logging_Handler::get_handle (void) const
{
return this->cli_stream_.get_handle ();
}
int
Logging_Handler::open (void)
{
ACE_INET_Addr addr;
if (this->cli_stream_.get_remote_addr (addr) == -1)
return -1;
else
{
ACE_OS::strncpy (this->host_name_,
addr.get_host_name (),
MAXHOSTNAMELEN + 1);
if (REACTOR::instance ()->register_handler (this, READ_MASK) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("(%P|%t) can't register with reactor\n")),
-1);
else if (REACTOR::instance ()->schedule_timer
(this, (const void *) this,
ACE_Time_Value (2),
ACE_Time_Value (2)) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("(%P|%t) can't register with reactor\n")),
-1);
else
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) connected with %C\n"),
this->host_name_));
return 0;
}
}
// Perform termination activities when deregistered from the
// ACE_Reactor.
int
Logging_Handler::handle_close (ACE_HANDLE, ACE_Reactor_Mask)
{
// Must have been allocated dynamically
delete this;
return 0;
}
// Perform termination activities when close fails.
int
Logging_Handler::close (void)
{
return this->handle_close ();
}
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