Examples of org.apache.mina.core.filterchain.IoFilter

Package org.apache.mina.core.filterchain

Examples of org.apache.mina.core.filterchain.IoFilter

org.apache.mina.core.filterchain.IoFilter
A filter which intercepts {@link IoHandler} events like Servletfilters. Filters can be used for these purposes:
- Event logging,
- Performance measurement,
- Authorization,
- Overload control,
- Message transformation (e.g. encryption and decryption, ...),
- and many more.
Please NEVER implement your filters to wrap {@link IoSession}s. Users can cache the reference to the session, which might malfunction if any filters are added or removed later.
The Life Cycle
{@link IoFilter}s are activated only when they are inside {@link IoFilterChain}.
When you add an {@link IoFilter} to an {@link IoFilterChain}:
1. {@link #init()} is invoked by {@link ReferenceCountingFilter} ifthe filter is added at the first time.
2. {@link #onPreAdd(IoFilterChain,String,NextFilter)} is invoked to notifythat the filter will be added to the chain.
3. The filter is added to the chain, and all events and I/O requests pass through the filter from now.
4. {@link #onPostAdd(IoFilterChain,String,NextFilter)} is invoked to notifythat the filter is added to the chain.
5. The filter is removed from the chain if {@link #onPostAdd(IoFilterChain,String,org.apache.mina.core.filterchain.IoFilter.NextFilter)}threw an exception. {@link #destroy()} is also invoked by{@link ReferenceCountingFilter} if the filter is the last filter whichwas added to {@link IoFilterChain}s.
When you remove an {@link IoFilter} from an {@link IoFilterChain}:
1. {@link #onPreRemove(IoFilterChain,String,NextFilter)} is invoked tonotify that the filter will be removed from the chain.
2. The filter is removed from the chain, and any events and I/O requests don't pass through the filter from now.
3. {@link #onPostRemove(IoFilterChain,String,NextFilter)} is invoked tonotify that the filter is removed from the chain.
4. {@link #destroy()} is invoked by {@link ReferenceCountingFilter} ifthe removed filter was the last one.
@author The Apache MINA Project (dev@mina.apache.org) @version $Rev: 591770 $, $Date: 2007-11-04 13:22:44 +0100 (Sun, 04 Nov 2007) $ @see IoFilterAdapter

                throw new LdapException( "Cannot use TLS when the useSsl flag is set true in the configuration" );
            }


            checkSession();


            IoFilter sslFilter = ldapSession.getFilterChain().get( SSL_FILTER_KEY );
            if ( sslFilter != null )
            {
                LOG.debug( "LDAP session already using startTLS" );
                return;
            }

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    @Test
    public void testGet() throws Exception {
        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();


        IoFilter filterA = new NoopFilter();
        IoFilter filterB = new NoopFilter();
        IoFilter filterC = new NoopFilter();
        IoFilter filterD = new NoopFilter();


        builder.addFirst("A", filterA);
        builder.addLast("B", filterB);
        builder.addBefore("B", "C", filterC);
        builder.addAfter("A", "D", filterD);

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            throw new IllegalStateException(
                    "Already connected. Disconnect first.");
        }


        try {
            IoFilter LOGGING_FILTER = new LoggingFilter();


            IoFilter CODEC_FILTER = new ProtocolCodecFilter(
                    new TextLineCodecFactory());
            
            connector.getFilterChain().addLast("mdc", new MdcInjectionFilter());
            connector.getFilterChain().addLast("codec", CODEC_FILTER);
            connector.getFilterChain().addLast("logger", LOGGING_FILTER);

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        connector.dispose();
    }


    public void testAcceptorFilterChain() throws Exception {
        int port = AvailablePortFinder.getNextAvailable(1024);
        IoFilter mockFilter = new MockFilter();
        IoHandler mockHandler = new MockHandler();


        acceptor.getFilterChain().addLast("mock", mockFilter);
        acceptor.setHandler(mockHandler);
        acceptor.bind(new InetSocketAddress(port));

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        assertEquals("FCAEBGDH", actual);
    }


    @Test
    public void testGet() throws Exception {
        IoFilter filterA = new NoopFilter();
        IoFilter filterB = new NoopFilter();
        IoFilter filterC = new NoopFilter();
        IoFilter filterD = new NoopFilter();


        chain.addFirst("A", filterA);
        chain.addLast("B", filterB);
        chain.addBefore("B", "C", filterC);
        chain.addAfter("A", "D", filterD);

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                + "ASC BSC HSC");
    }


    @Test
    public void testAddRemove() throws Exception {
        IoFilter filter = new AddRemoveTestFilter();


        chain.addFirst("A", filter);
        assertEquals("ADDED", result);


        chain.remove("A");

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    }


    @Override
    protected Context createJndiContext() throws Exception {
        JndiContext answer = new JndiContext();
        IoFilter myFilter = new TestFilter();
        List<IoFilter> myFilters = new ArrayList<IoFilter>();
        myFilters.add(myFilter);


        answer.bind("myFilters", myFilters);
        answer.bind("myFilter", myFilter);

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        assertEquals("FCAEBGDH", actual);
    }


    @Test
    public void testGet() throws Exception {
        IoFilter filterA = new NoopFilter();
        IoFilter filterB = new NoopFilter();
        IoFilter filterC = new NoopFilter();
        IoFilter filterD = new NoopFilter();


        chain.addFirst("A", filterA);
        chain.addLast("B", filterB);
        chain.addBefore("B", "C", filterC);
        chain.addAfter("A", "D", filterD);

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                + "ASC BSC HSC");
    }


    @Test
    public void testAddRemove() throws Exception {
        IoFilter filter = new AddRemoveTestFilter();


        chain.addFirst("A", filter);
        assertEquals("ADDED", result);


        chain.remove("A");

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        connector.dispose();
    }


    public void testAcceptorFilterChain() throws Exception {
        int port = AvailablePortFinder.getNextAvailable(1024 + 1000);
        IoFilter mockFilter = new MockFilter();
        IoHandler mockHandler = new MockHandler();


        acceptor.getFilterChain().addLast("mock", mockFilter);
        acceptor.setHandler(mockHandler);
        acceptor.bind(new InetSocketAddress(port));

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Examples of org.apache.mina.core.filterchain.IoFilter

The Life Cycle

Related Classes of org.apache.mina.core.filterchain.IoFilter