/**
* If there is no variable with the specified name, then create one. This is done in
* preinitialize() so that we can set up a type constraint that ensures that the type of the
* variable is at least that of the input port.
*
* @exception IllegalActionException If the superclass throws it, or if there is no container.
*/
public void preinitialize() throws IllegalActionException {
super.preinitialize();
Attribute attribute = getModifiedVariable();
if (attribute instanceof Variable) {
((Variable) attribute).setTypeAtLeast(input);
}
}
///////////////////////////////////////////////////////////////////
//// public methods ////
public void preinitialize() throws IllegalActionException {
super.preinitialize();
PropertyConfigurator.configure(System.getProperties());
// if (configDir.hasToken()) {
// String Dir = ((StringToken)configDir.getToken()).stringValue();
// } else {
String Dir = "c:/Cygwin/home/ellen_zh/ptII/ptolemy/actor/lib/jxta";
// }
// if (actorList.hasToken()) {
// String _actorListFileName = ((StringToken)actorList.getToken()).stringValue();
// } else {
String _actorListFileName = "c:/Cygwin/home/ellen_zh/ptII/ptolemy/actor/lib/jxta/actors.xml";
// }
_properties = new Properties(System.getProperties());
InputStream configProperties = null;
try {
configProperties = new FileInputStream(_CONFIG_FILE);
_properties.load(configProperties);
} catch (IOException e) {
System.out.println(
"Warning: Can't find configuration propertiees file. ' " + e.getMessage() + "'");
} finally {
if (configProperties != null) {
try {
configProperties.close();
} catch (Throwable throwable) {
System.out.println("Ignoring failure to close stream " + "on '" + _CONFIG_FILE + "'");
throwable.printStackTrace();
}
}
}
PeerGroup netPeerGroup = null;
try {
netPeerGroup = PeerGroupFactory.newNetPeerGroup();
} catch (PeerGroupException ex) {
System.out.println("Error: cannot locate net peer group.\n" + ex.getMessage());
}
// load the peer group adv for actor exchange
String groupAdvFileName = _properties.getProperty("GroupAdvFileName");
if (groupAdvFileName == null) {
System.out.println("Error: property undefined - GroupAdvFileName.\n");
}
PeerGroupAdvertisement groupAdv = null;
try {
groupAdv =
(PeerGroupAdvertisement)
AdvertisementFactory.newAdvertisement(
XML_MIME_TYPE, new FileInputStream(Dir + "/" + groupAdvFileName));
} catch (FileNotFoundException ex) {
System.out.println("Error: cannot find group adv file.\n" + ex.getMessage());
} catch (IOException ex) {
System.out.println("Error: reading group adv file.\n" + ex.getMessage());
}
System.out.println("peer groupAdv: " + groupAdvFileName);
System.out.println("success before instantiate peer group");
// instantiate the peer group for actor exchange
try {
_group = netPeerGroup.newGroup(groupAdv);
} catch (PeerGroupException ex) {
System.out.println("Error: cannot instantiate peer group.\n" + ex.getMessage());
}
// join the peer group for actor exchange
// no authentication is done here
// modeled after JoinDemo from JXTA Examples
StructuredDocument identityInfo = null;
try {
AuthenticationCredential authCred = new AuthenticationCredential(_group, null, identityInfo);
MembershipService membershipService = _group.getMembershipService();
_authenticator = membershipService.apply(authCred);
if (_authenticator.isReadyForJoin()) {
_credential = membershipService.join(_authenticator);
System.out.println("Info: join group successful.");
_credential.getDocument(XML_MIME_TYPE).sendToStream(System.out);
} else {
System.out.println("Error: unable to join group.");
}
} catch (Exception ex) {
System.out.println("Error: failure in authentication.\n" + ex.getMessage());
}
_discoveryService = _group.getDiscoveryService();
_discoveryService.addDiscoveryListener(this);
_resolverService = _group.getResolverService();
// register this as a query handler
_resolverService.registerHandler(_ACTOR_QUERY_HANDLER_NAME, this);
// construct the actor query message
StringBuffer queryTextBuffer = new StringBuffer("<?xml version=\"1.0\"?>\n\n");
queryTextBuffer = queryTextBuffer.append("<ActorQuery>\n");
queryTextBuffer = queryTextBuffer.append("What actors do you have?");
queryTextBuffer = queryTextBuffer.append("\n</ActorQuery>\n");
_actorQueryMessage =
new ResolverQuery(_ACTOR_QUERY_HANDLER_NAME, null, null, queryTextBuffer.toString(), 0);
_actorQueryMessage.setSrc(_group.getPeerID().toString());
// construct the actor query response message
if (_actorListFileName != null) {
StringBuffer actorListText = new StringBuffer();
BufferedReader fileReader = null;
try {
fileReader = new BufferedReader(new FileReader(_actorListFileName));
String newline = System.getProperty("line.separator");
while (true) {
String line = fileReader.readLine();
if (line == null) {
break;
}
actorListText = actorListText.append(line);
actorListText = actorListText.append(newline);
}
_actorQueryResponse =
new ResolverResponse(_ACTOR_QUERY_HANDLER_NAME, null, 0, actorListText.toString());
} catch (IOException ex) {
System.out.println("Warning: error reading actor list file.\n" + ex.getMessage());
} finally {
if (fileReader != null) {
try {
fileReader.close();
} catch (Exception ex) {
System.out.println("Failed to close: " + ex.getMessage());
}
}
}
}
}
/** Initialize the actor by getting the input and output parameters from the soap service. */
public void preinitialize() throws IllegalActionException {
super.preinitialize();
}