basechannel.java

来自「java pos,你可以直接编译运行,」· Java 代码 · 共 846 行 · 第 1/2 页

     */
    public void send (ISOMsg m) 
        throws IOException, ISOException, VetoException
    {
        LogEvent evt = new LogEvent (this, "send");
        evt.addMessage (m);
        try {
            if (!isConnected())
                throw new ISOException ("unconnected ISOChannel");
            m.setDirection(ISOMsg.OUTGOING);
            m = applyOutgoingFilters (m, evt);
            m.setDirection(ISOMsg.OUTGOING); // filter may have drop this info
            m.setPackager (getDynamicPackager(m));
            byte[] b = m.pack();
            synchronized (serverOut) {
                sendMessageLength(b.length + getHeaderLength());
                sendMessageHeader(m, b.length);
                sendMessage (b, 0, b.length);
                sendMessageTrailler(m, b);
                serverOut.flush ();
            }
            cnt[TX]++;
            setChanged();
            notifyObservers(m);
        } catch (VetoException e) {
            evt.addMessage (e);
            throw e;
        } catch (ISOException e) {
            evt.addMessage (e);
            throw e;
        } catch (IOException e) {
            evt.addMessage (e);
            throw e;
        } catch (Exception e) {
            evt.addMessage (e);
            throw new ISOException ("unexpected exception", e);
        } finally {
            Logger.log (evt);
        }
    }
    protected boolean isRejected(byte[] b) {
        // VAP Header support - see VAPChannel
        return false;
    }
    protected boolean shouldIgnore (byte[] b) {
        // VAP Header support - see VAPChannel
        return false;
    }
    protected ISOMsg createMsg () {
        return new ISOMsg();
    }
	
    /**
     * Reads in a message header.
     *
     * @param hLen The Length og the reader to read
     * @return The header bytes that were read in
     */
    protected byte[] readHeader(int hLen) throws IOException {
        byte[] header = new byte[hLen];
        serverIn.readFully(header, 0, hLen);
        return header;
    }
    /**
     * Waits and receive an ISOMsg over the TCP/IP session
     * @return the Message received
     * @exception IOException
     * @exception ISOException
     */
    public ISOMsg receive() throws IOException, ISOException {
        byte[] b=null;
        byte[] header=null;
        LogEvent evt = new LogEvent (this, "receive");
        ISOMsg m = createMsg ();
        m.setSource (this);
        try {
            if (!isConnected())
                throw new ISOException ("unconnected ISOChannel");

            synchronized (serverIn) {
                int len  = getMessageLength();
                int hLen = getHeaderLength();

                if (len == -1) {
                    if (hLen > 0) {
                        header = readHeader(hLen);
                    }
                    b = streamReceive();
                }
                else if (len > 0 && len <= 10000) {
                    if (hLen > 0) {
                        // ignore message header (TPDU)
                        // Note header length is not necessarily equal to hLen (see VAPChannel)
                        header = readHeader(hLen);
                        len -= header.length;
                    }
                    b = new byte[len];
                    serverIn.readFully(b, 0, len);
                    getMessageTrailler();
                }
                else
                    throw new ISOException(
                        "receive length " +len + " seems strange");
            }
            m.setPackager (getDynamicPackager(b));
            m.setHeader (getDynamicHeader(header));
            if (b.length > 0 && !shouldIgnore (header))  // Ignore NULL messages
                m.unpack (b);
            m.setDirection(ISOMsg.INCOMING);
            m = applyIncomingFilters (m, header, b, evt);
            m.setDirection(ISOMsg.INCOMING);
            evt.addMessage (m);
            cnt[RX]++;
            setChanged();
            notifyObservers(m);
        } catch (ISOException e) {
            evt.addMessage (e);
            if (header != null) {
                evt.addMessage ("--- header ---");
                evt.addMessage (ISOUtil.hexdump (header));
            }
            if (b != null) {
                evt.addMessage ("--- data ---");
                evt.addMessage (ISOUtil.hexdump (b));
            }
            throw e;
        } catch (EOFException e) {
            if (socket != null)
                socket.close ();
            evt.addMessage ("<peer-disconnect/>");
            throw e;
        } catch (InterruptedIOException e) {
            if (socket != null)
                socket.close ();
            evt.addMessage ("<io-timeout/>");
            throw e;
        } catch (IOException e) { 
            if (socket != null)
                socket.close ();
            if (usable) 
                evt.addMessage (e);
            throw e;
        } catch (Exception e) { 
            evt.addMessage (m);
            evt.addMessage (e);
            throw new ISOException ("unexpected exception", e);
        } finally {
            Logger.log (evt);
        }
        return m;
    }
    /**
     * Low level receive
     * @param b byte array
     * @exception IOException
     */
    public int getBytes (byte[] b) throws IOException {
        return serverIn.read (b);
    }
    /**
     * disconnects the TCP/IP session. The instance is ready for
     * a reconnection. There is no need to create a new ISOChannel<br>
     * @exception IOException
     */
    public void disconnect () throws IOException {
        LogEvent evt = new LogEvent (this, "disconnect");
        if (serverSocket != null) 
            evt.addMessage ("local port "+serverSocket.getLocalPort()
                +" remote host "+serverSocket.getInetAddress());
        else
            evt.addMessage (host+":"+port);
        try {
            usable = false;
            setChanged();
            notifyObservers();
            if (serverIn != null) {
                try {
                    serverIn.close();
                } catch (IOException ex) { evt.addMessage (ex); }
                serverIn  = null;
            }
            if (serverOut != null) {
                try {
                    serverOut.close();
                } catch (IOException ex) { evt.addMessage (ex); }
                serverOut = null;
            }
            if (socket != null) {
                try {
                    socket.setSoLinger (true, 0);
                } catch (SocketException e) {
                    // safe to ignore - can be closed already
                }
                socket.close ();
            }
            Logger.log (evt);
        } catch (IOException e) {
            evt.addMessage (e);
            Logger.log (evt);
            throw e;
        }
        socket = null;
    }   
    /**
     * Issues a disconnect followed by a connect
     * @exception IOException
     */
    public void reconnect() throws IOException {
        disconnect();
        connect();
    }
    public void setLogger (Logger logger, String realm) {
        this.logger = logger;
        this.realm  = realm;
        if (originalRealm == null)
            originalRealm = realm;
    }
    public String getRealm () {
        return realm;
    }
    public Logger getLogger() {
        return logger;
    }
    public String getOriginalRealm() {
        return originalRealm == null ? 
            this.getClass().getName() : originalRealm;
    }
    /**
     * associates this ISOChannel with a name using NameRegistrar
     * @param name name to register
     * @see NameRegistrar
     */
    public void setName (String name) {
        this.name = name;
        NameRegistrar.register ("channel."+name, this);
    }
    /**
     * @return this ISOChannel's name ("" if no name was set)
     */
    public String getName() {
        return this.name;
    }
    /**
     * @param filter filter to add
     * @param direction ISOMsg.INCOMING, ISOMsg.OUTGOING, 0 for both
     */
    public void addFilter (ISOFilter filter, int direction) {
        switch (direction) {
            case ISOMsg.INCOMING :
                incomingFilters.add (filter);
                break;
            case ISOMsg.OUTGOING :
                outgoingFilters.add (filter);
                break;
            case 0 :
                incomingFilters.add (filter);
                outgoingFilters.add (filter);
                break;
        }
    }
    /**
     * @param filter incoming filter to add
     */
    public void addIncomingFilter (ISOFilter filter) {
        addFilter (filter, ISOMsg.INCOMING);
    }
    /**
     * @param filter outgoing filter to add
     */
    public void addOutgoingFilter (ISOFilter filter) {
        addFilter (filter, ISOMsg.OUTGOING);
    }

    /**
     * @param filter filter to add (both directions, incoming/outgoing)
     */
    public void addFilter (ISOFilter filter) {
        addFilter (filter, 0);
    }
    /**
     * @param filter filter to remove
     * @param direction ISOMsg.INCOMING, ISOMsg.OUTGOING, 0 for both
     */
    public void removeFilter (ISOFilter filter, int direction) {
        switch (direction) {
            case ISOMsg.INCOMING :
                incomingFilters.remove (filter);
                break;
            case ISOMsg.OUTGOING :
                outgoingFilters.remove (filter);
                break;
            case 0 :
                incomingFilters.remove (filter);
                outgoingFilters.remove (filter);
                break;
        }
    }
    /**
     * @param filter filter to remove (both directions)
     */
    public void removeFilter (ISOFilter filter) {
        removeFilter (filter, 0);
    }
    /**
     * @param filter incoming filter to remove
     */
    public void removeIncomingFilter (ISOFilter filter) {
        removeFilter (filter, ISOMsg.INCOMING);
    }
    /**
     * @param filter outgoing filter to remove
     */
    public void removeOutgoingFilter (ISOFilter filter) {
        removeFilter (filter, ISOMsg.OUTGOING);
    }
    protected ISOMsg applyOutgoingFilters (ISOMsg m, LogEvent evt) 
        throws VetoException
    {
        Iterator iter  = outgoingFilters.iterator();
        while (iter.hasNext())
            m = ((ISOFilter) iter.next()).filter (this, m, evt);
        return m;
    }
    protected ISOMsg applyIncomingFilters (ISOMsg m, LogEvent evt) 
        throws VetoException 
    {
        return applyIncomingFilters (m, null, null, evt);
    }
    protected ISOMsg applyIncomingFilters (ISOMsg m, byte[] header, byte[] image, LogEvent evt) 
        throws VetoException
    {
        Iterator iter  = incomingFilters.iterator();
        while (iter.hasNext()) {
            ISOFilter f = (ISOFilter) iter.next ();
            if (image != null && (f instanceof RawIncomingFilter))
                m = ((RawIncomingFilter)f).filter (this, m, header, image, evt);
            else
                m = f.filter (this, m, evt);
        }
        return m;
    }
   /**
    * Implements Configurable<br>
    * Properties:<br>
    * <ul>
    * <li>host - destination host (if ClientChannel)
    * <li>port - port number      (if ClientChannel)
    * </ul>
    * (host not present indicates a ServerChannel)
    *
    * @param cfg Configuration
    * @throws ConfigurationException
    */
    public void setConfiguration (Configuration cfg)
        throws ConfigurationException 
    {
        String h    = cfg.get    ("host");
        int port    = cfg.getInt ("port");
        if (h != null && h.length() > 0) {
            if (port == 0)
                throw new ConfigurationException 
                    ("invalid port for host '"+h+"'");
            setHost (h, port);
        }
        overrideHeader = cfg.getBoolean ("override-header", false);
        if (socketFactory != this && socketFactory instanceof Configurable)
            ((Configurable)socketFactory).setConfiguration (cfg);
        try {
            setTimeout (cfg.getInt ("timeout"));
        } catch (SocketException e) {
            throw new ConfigurationException (e);
        }
    }
    public Collection getIncomingFilters() {
        return incomingFilters;
    }
    public Collection getOutgoingFilters() {
        return outgoingFilters;
    }
    public void setIncomingFilters (Collection filters) {
        incomingFilters = new Vector (filters);
    }
    public void setOutgoingFilters (Collection filters) {
        outgoingFilters = new Vector (filters);
    }
    public void setHeader (byte[] header) {
        this.header = header;
    }
    public void setHeader (String header) {
        setHeader (header.getBytes());
    }
    public byte[] getHeader () {
        return header;
    }
    /**
     * @return ISOChannel instance with given name.
     * @throws NameRegistrar.NotFoundException;
     * @see NameRegistrar
     */
    public static ISOChannel getChannel (String name)
        throws NameRegistrar.NotFoundException
    {
        return (ISOChannel) NameRegistrar.get ("channel."+name);
    }
   /**
    * Gets the ISOClientSocketFactory (may be null)
    * @see     ISOClientSocketFactory
    * @since 1.3.3
    */
    public ISOClientSocketFactory getSocketFactory() {
        return socketFactory;
    }
   /**
    * Sets the specified Socket Factory to create sockets
    * @param         socketFactory the ISOClientSocketFactory
    * @see           ISOClientSocketFactory
    * @since 1.3.3
    */
    public void setSocketFactory(ISOClientSocketFactory socketFactory) {
        this.socketFactory = socketFactory;
    }
}