1 package OpenSRF::Transport;
2 use strict; use warnings;
4 use Time::HiRes qw/time/;
6 use OpenSRF::AppSession;
7 use OpenSRF::Utils::Logger qw(:level);
8 use OpenSRF::DomainObject::oilsResponse qw/:status/;
9 use OpenSRF::EX qw/:try/;
10 use OpenSRF::Transport::SlimJabber::MessageWrapper;
13 # --- These must be implemented by all Transport subclasses
14 # -------------------------------------------
18 Returns the package name of the package the system will use to
19 gather incoming requests
23 sub get_listener { shift()->alert_abstract(); }
25 =head2 get_peer_client
27 Returns the name of the package responsible for client communication
31 sub get_peer_client { shift()->alert_abstract(); }
33 =head2 get_msg_envelope
35 Returns the name of the package responsible for parsing incoming messages
39 sub get_msg_envelope { shift()->alert_abstract(); }
41 # -------------------------------------------
43 our $message_envelope;
44 my $logger = "OpenSRF::Utils::Logger";
48 =head2 message_envelope( [$envelope] );
50 Sets the message envelope class that will allow us to extract
51 information from the messages we receive from the low
56 sub message_envelope {
57 my( $class, $envelope ) = @_;
59 $message_envelope = $envelope;
60 eval "use $envelope;";
63 "Error loading message_envelope: $envelope -> $@", ERROR);
66 return $message_envelope;
69 =head2 handler( $data )
71 Creates a new MessageWrapper, extracts the remote_id, session_id, and message body
72 from the message. Then, creates or retrieves the AppSession object with the session_id and remote_id.
73 Finally, creates the message document from the body of the message and calls
74 the handler method on the message document.
79 my $start_time = time();
80 my( $class, $service, $data ) = @_;
82 $logger->transport( "Transport handler() received $data", INTERNAL );
84 # pass data to the message envelope
85 my $helper = OpenSRF::Transport::SlimJabber::MessageWrapper->new( $data );
87 # Extract message information
88 my $remote_id = $helper->get_remote_id();
89 my $sess_id = $helper->get_sess_id();
90 my $body = $helper->get_body();
91 my $type = $helper->get_msg_type();
94 "Transport building/retrieving session: $service, $remote_id, $sess_id", DEBUG );
96 # See if the app_session already exists. If so, make
97 # sure the sender hasn't changed if we're a server
98 my $app_session = OpenSRF::AppSession->find( $sess_id );
99 if( $app_session and $app_session->endpoint == $app_session->SERVER() and
100 $app_session->remote_id ne $remote_id ) {
101 $logger->transport( "Backend Gone or invalid sender", INTERNAL );
102 my $res = OpenSRF::DomainObject::oilsBrokenSession->new();
103 $res->status( "Backend Gone or invalid sender, Reconnect" );
104 $app_session->status( $res );
108 # Retrieve or build the app_session as appropriate (server_build decides which to do)
109 $logger->transport( "AppSession is valid or does not exist yet", INTERNAL );
110 $app_session = OpenSRF::AppSession->server_build( $sess_id, $remote_id, $service );
112 if( ! $app_session ) {
113 throw OpenSRF::EX::Session ("Transport::handler(): No AppSession object returned from server_build()");
116 # Create a document from the XML contained within the message
118 eval { $doc = OpenSRF::DOM->new->parse_string($body); };
121 $logger->transport( "Received bogus XML", INFO );
122 $logger->transport( "Bogus XML data: \n $body \n", INTERNAL );
123 my $res = OpenSRF::DomainObject::oilsXMLParseError->new( status => "XML Parse Error --- $body" );
125 $app_session->status($res);
126 #$app_session->kill_me;
130 $logger->transport( "Transport::handler() creating \n$body", INTERNAL );
132 # We need to disconnect the session if we got a jabber error on the client side. For
133 # server side, we'll just tear down the session and go away.
134 if (defined($type) and $type eq 'error') {
136 if( $app_session->endpoint == $app_session->SERVER() ) {
137 $app_session->kill_me;
141 $app_session->state( $app_session->DISCONNECTED );
142 # below will lead to infinite looping, should return an exception
143 #$app_session->push_resend( $app_session->app_request(
144 # $doc->documentElement->firstChild->threadTrace ) );
146 "Got Jabber error on client connection $remote_id, nothing we can do..", ERROR );
152 # cycle through and pass each oilsMessage contained in the message
153 # up to the message layer for processing.
154 for my $msg ($doc->documentElement->childNodes) {
157 "Transport::handler()passing to message handler \n".$msg->toString(1), DEBUG );
160 "Transport passing up ".$msg->type." from ".
161 $app_session->remote_id . " with threadTrace [" . $msg->threadTrace."]", INFO );
163 next unless ( $msg->nodeName eq 'oils:domainObject' &&
164 $msg->getAttribute('name') eq 'oilsMessage' );
166 if( $app_session->endpoint == $app_session->SERVER() ) {
170 if( ! $msg->handler( $app_session ) ) { return 0; }
172 $logger->debug("Successfully handled message", DEBUG);
177 my $res = OpenSRF::DomainObject::oilsServerError->new();
178 $res->status( $res->status . "\n$e");
179 $app_session->status($res) if $res;
180 $app_session->kill_me;
187 if( ! $msg->handler( $app_session ) ) { return 0; }
188 $logger->debug("Successfully handled message", DEBUG);
194 $logger->debug(sprintf("Message processing duration: %.3fs",(time() - $start_time)), DEBUG);