private void handleDisconnect() {
Connection c = null;
try {
netCode = ois.readInt();
c = checkConnectionNetCode();
if (c != null && c.getState() == Connection.STATE_CONNECTED) {
oos.writeInt(DISCONNECTED);
oos.flush();
System.out.println("->DISCONNECTED"); // $NON-NLS-1$
c.setState(Connection.STATE_DISCONNECTED);
} else {
System.out.println("->NOT_CONNECTED"); // $NON-NLS-1$
oos.writeInt(NOT_CONNECTED);
oos.flush();
}
} catch (IOException e) {
System.out.println("handleDisconnect: " + e.getMessage()); // $NON-NLS-1$
if (c != null) {
c.setState(Connection.STATE_DISCONNECTED);
System.out.println(
"Connection closed with "
+ //$NON-NLS-1$
c.getRemoteAddress()
+ ":"
+ c.getRemotePort()); // $NON-NLS-1$
}
}
}
private void handleSendCode() {
Connection c = null;
GeneticCode code;
try {
netCode = ois.readInt();
c = checkConnectionNetCode();
if (c != null && c.getState() == Connection.STATE_CONNECTED) {
oos.writeInt(WAITING_CODE);
oos.flush();
System.out.println("->WAITING_CODE"); // $NON-NLS-1$
code = (GeneticCode) ois.readObject();
System.out.println("Genetic code"); // $NON-NLS-1$
oos.writeInt(CODE_RECEIVED);
oos.flush();
System.out.println("->CODE_RECEIVED"); // $NON-NLS-1$
c.getInCorridor().receiveOrganism(code);
} else {
System.out.println("->NOT_CONNECTED"); // $NON-NLS-1$
oos.writeInt(NOT_CONNECTED);
oos.flush();
}
} catch (IOException e) {
System.out.println("handleSendCode: " + e.getMessage()); // $NON-NLS-1$
if (c != null) {
c.setState(Connection.STATE_DISCONNECTED);
System.out.println(
"Connection closed with "
+ c.getRemoteAddress()
+ //$NON-NLS-1$
":"
+ c.getRemotePort()); // $NON-NLS-1$
}
} catch (ClassNotFoundException e) {
System.out.println("handleSendCode: " + e.getMessage()); // $NON-NLS-1$
if (c != null) {
c.setState(Connection.STATE_DISCONNECTED);
System.out.println(
"Connection closed with "
+ c.getRemoteAddress()
+ //$NON-NLS-1$
":"
+ c.getRemotePort()); // $NON-NLS-1$
}
}
}
public void closeServer() {
isActive = false;
// Remove all connections
synchronized (connections) {
for (Connection c : connections) {
c.send(DISCONNECT);
c.setState(DISCONNECTED);
}
}
connections = Collections.synchronizedList(new ArrayList<Connection>());
}
@SuppressWarnings("unchecked")
@Override
public void onConnected(Connection con) throws IOException {
con.setState(Connection.State.connecting);
String info =
con.getDirection() == Connection.Direction.in
? "remote peer connected to me " + con
: " connected to remote peer " + con;
LOGGER.info(info);
handler.onConnected(con);
}
public Connection nextConnectionState(URI connectionURI, ConnectionEventType connectionEventType)
throws NoSuchConnectionException, IllegalMessageForConnectionStateException {
if (connectionURI == null) throw new IllegalArgumentException("connectionURI is not set");
// load connection, checking if it exists
Connection con = DataAccessUtils.loadConnection(connectionRepository, connectionURI);
// perform state transit
ConnectionState nextState = performStateTransit(con, connectionEventType);
// set new state and save in the db
con.setState(nextState);
// save in the db
return connectionRepository.saveAndFlush(con);
}
/**
* Creates a new Connection object. Expects <> won:hasFacet [FACET] in the RDF content, will throw
* exception if it's not there.
*
* @param needURI
* @param otherNeedURI
* @param otherConnectionURI
* @param content
* @param connectionState
* @param connectionEventType
* @return
* @throws NoSuchNeedException
* @throws IllegalMessageForNeedStateException
* @throws ConnectionAlreadyExistsException
*/
public Connection createConnection(
final URI needURI,
final URI otherNeedURI,
final URI otherConnectionURI,
final Model content,
final ConnectionState connectionState,
final ConnectionEventType connectionEventType)
throws NoSuchNeedException, IllegalMessageForNeedStateException,
ConnectionAlreadyExistsException {
if (needURI == null) throw new IllegalArgumentException("needURI is not set");
if (otherNeedURI == null) throw new IllegalArgumentException("otherNeedURI is not set");
if (needURI.equals(otherNeedURI))
throw new IllegalArgumentException("needURI and otherNeedURI are the same");
// Load need (throws exception if not found)
Need need = DataAccessUtils.loadNeed(needRepository, needURI);
if (!isNeedActive(need))
throw new IllegalMessageForNeedStateException(
needURI, connectionEventType.name(), need.getState());
URI facetURI = getFacet(content);
if (facetURI == null)
throw new IllegalArgumentException(
"at least one RDF node must be of type won:" + WON.HAS_FACET.getLocalName());
// TODO: create a proper exception if a facet is not supported by a need
if (facetRepository.findByNeedURIAndTypeURI(needURI, facetURI).isEmpty())
throw new RuntimeException("Facet is not supported by Need: " + facetURI);
List<Connection> connections =
connectionRepository.findByNeedURIAndRemoteNeedURI(needURI, otherNeedURI);
Connection con = getConnection(connections, facetURI, connectionEventType);
if (con == null) {
/* Create connection */
con = new Connection();
con.setNeedURI(needURI);
con.setState(connectionState);
con.setRemoteNeedURI(otherNeedURI);
con.setRemoteConnectionURI(otherConnectionURI);
con.setTypeURI(facetURI);
// save connection (this creates a new id)
con = connectionRepository.saveAndFlush(con);
// create and set new uri
con.setConnectionURI(URIService.createConnectionURI(con));
con = connectionRepository.saveAndFlush(con);
// TODO: do we save the connection content? where? as a chat content?
}
return con;
}
private void handleConnect() {
try {
int program_version = ois.readInt();
port = ois.readInt();
address = listenSocket.getInetAddress();
netCode = ois.readInt();
Connection c = checkConnectionNetCode();
if (c != null) {
oos.writeInt(ALREADY_CONNECTED);
oos.flush();
System.out.println("->ALREADY_CONNECTED"); // $NON-NLS-1$
} else {
if (isAcceptingConnections()) {
if (connections.size() < Utils.getMAX_CONNECTIONS()) {
if (Utils.VERSION == program_version) {
Connection newConnection = newConnection();
if (newConnection != null) {
oos.writeInt(CONNECTED);
newConnection.setState(Connection.STATE_CONNECTED);
System.out.println("->CONNECTED"); // $NON-NLS-1$
} else {
oos.writeInt(ALREADY_CONNECTED);
System.out.println("->ALREADY_CONNECTED"); // $NON-NLS-1$
}
oos.flush();
} else {
oos.writeInt(INCOMPATIBLE_PROGRAM_VERSION);
oos.flush();
System.out.println("->INCOMPATIBLE_PROGRAM_VERSION"); // $NON-NLS-1$
}
} else {
oos.writeInt(TOO_MANY_CONNECTIONS);
oos.flush();
System.out.println("->TOO_MANY_CONNECTIONS"); // $NON-NLS-1$
}
} else {
oos.writeInt(NOT_ACCEPTING_CONNECTIONS);
oos.flush();
System.out.println("->NOT_ACCEPTING_CONNECTIONS"); // $NON-NLS-1$
}
}
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
}
public Connection getConnection(
List<Connection> connections, URI facetURI, ConnectionEventType eventType)
throws ConnectionAlreadyExistsException {
Connection con = null;
for (Connection c : connections) {
// TODO: check remote need type as well or create GroupMemberFacet
if (facetURI.equals(c.getTypeURI())) con = c;
}
/**
* check if there already exists a connection between those two we have multiple options: a) no
* connection exists -> create new b) a connection exists in state CONNECTED -> error message c)
* a connection exists in state REQUEST_SENT. The call must be a duplicate (or re-sent after the
* remote end hasn't replied for some time) -> error message d) a connection exists in state
* REQUEST_RECEIVED. The remote end tried to connect before we did. -> error message e) a
* connection exists in state CLOSED -> create new
*/
// TODO: impose unique constraint on connections
if (con != null) {
if (con.getState() == ConnectionState.CONNECTED
|| con.getState() == ConnectionState.REQUEST_SENT)
throw new ConnectionAlreadyExistsException(
con.getConnectionURI(), con.getNeedURI(), con.getRemoteNeedURI());
/*if(!eventType.isMessageAllowed(con.getState())){
throw new ConnectionAlreadyExistsException(con.getConnectionURI(), con.getNeedURI(), con.getRemoteNeedURI());
}*/ else {
// TODO: Move this to the transition() - Method in ConnectionState
con.setState(con.getState().transit(eventType));
con = connectionRepository.saveAndFlush(con);
}
}
return con;
}
