Examples of org.apache.jk.core.Msg

org.apache.jk.core.Msg
A single packet for communication between the web server and the container. In a more generic sense, it's the event that drives the processing chain. XXX Use Event, make Msg a particular case. @author Henri Gomez [hgomez@apache.org] @author Dan Milstein [danmil@shore.net] @author Keith Wannamaker [Keith@Wannamaker.org] @author Kevin Seguin @author Costin Manolache

        
        res.setOutputBuffer( this );
        req.setInputBuffer( this );
        
        if( ep.getNote( headersMsgNote ) == null ) {
            Msg msg2=new MsgAjp();
            ep.setNote( headersMsgNote, msg2 );
        }
        
        res.setNote( epNote, ep );
        ep.setStatus( JK_STATUS_HEAD );

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        res.setOutputBuffer( this );
        req.setInputBuffer( this );
        
        if( ep.getNote( headersMsgNote ) == null ) {
            Msg msg2=new MsgAjp();
            ep.setNote( headersMsgNote, msg2 );
        }
        
        res.setNote( epNote, ep );
        ep.setStatus( JK_STATUS_HEAD );

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        res.setOutputBuffer( this );
        req.setInputBuffer( this );
        
        if( ep.getNote( headersMsgNote ) == null ) {
            Msg msg2=new MsgAjp();
            ep.setNote( headersMsgNote, msg2 );
        }
        
        res.setNote( epNote, ep );
        ep.setStatus( JK_STATUS_HEAD );

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     *  in the same buffer
     */
    public int receive( Msg msg, MsgContext ep )
        throws IOException
    {
        Msg sentResponse=(Msg)ep.getNote( receivedNote );
        ep.setNote( receivedNote, null );


        if( sentResponse == null ) {
            if( log.isDebugEnabled() )
                log.debug("No send() prior to receive(), no data buffer");
            // No sent() was done prior to receive.
            msg.reset();
            return 0;
        }
        
        sentResponse.processHeader();


        if( log.isTraceEnabled() )
            sentResponse.dump("received response ");


        if( msg != sentResponse ) {
            log.error( "Error, in JNI mode the msg used for receive() must be identical with the one used for send()");
        }

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    }


    public void resetScoreboard() throws IOException {
        if( apr==null ) return;
        MsgContext mCtx=createMsgContext();
        Msg msg=(Msg)mCtx.getMsg(0);
        msg.reset();


        msg.appendByte( SHM_RESET );
        
        this.invoke( msg, mCtx );
    }

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    }


    public void dumpScoreboard(String fname) throws IOException {
        if( apr==null ) return;
        MsgContext mCtx=createMsgContext();
        Msg msg=(Msg)mCtx.getMsg(0);
        C2BConverter c2b=mCtx.getConverter();
        msg.reset();


        msg.appendByte( SHM_DUMP );


        appendString( msg, fname, c2b);
        
        this.invoke( msg, mCtx );
    }

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    {
        String instanceId=host+":" + port;


        String slotName="TOMCAT:" + instanceId;
        MsgContext mCtx=createMsgContext();
        Msg msg=(Msg)mCtx.getMsg(0);
        msg.reset();
        C2BConverter c2b=mCtx.getConverter();
        
        msg.appendByte( SHM_WRITE_SLOT );
        appendString( msg, slotName, c2b );


        int channelCnt=1;
        if( unixDomain != null ) channelCnt++;


        // number of groups. 0 means the default lb.
        msg.appendInt( groups.size() );
        for( int i=0; i<groups.size(); i++ ) {
            appendString( msg, (String)groups.elementAt( i ), c2b);
            appendString( msg, instanceId, c2b);
        }
        
        // number of channels for this instance
        msg.appendInt( channelCnt );
        
        // The body:
        appendString(msg, "channel.socket:" + host + ":" + port, c2b );
        msg.appendInt( 1 );
        appendString(msg, "tomcatId", c2b);
        appendString(msg, instanceId, c2b);


        if( unixDomain != null ) {
            appendString(msg, "channel.apr:" + unixDomain, c2b );
            msg.appendInt(1);
            appendString(msg, "tomcatId", c2b);
            appendString(msg, instanceId, c2b);
        }


        if (log.isDebugEnabled())

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    public void unRegisterTomcat(String host, int port)
        throws IOException
    {
        String slotName="TOMCAT:" + host + ":" + port;
        MsgContext mCtx=createMsgContext();
        Msg msg=(Msg)mCtx.getMsg(0);
        msg.reset();
        C2BConverter c2b=mCtx.getConverter();
        
        msg.appendByte( SHM_WRITE_SLOT );
        appendString( msg, slotName, c2b );


        // number of channels for this instance
        msg.appendInt( 0 );
        msg.appendInt( 0 );
        
        if (log.isDebugEnabled())
            log.debug("UnRegister " + slotName );
        this.invoke( msg, mCtx );
    }

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     *  in the same buffer
     */
    public int receive( Msg msg, MsgContext ep )
        throws IOException
    {
        Msg sentResponse=(Msg)ep.getNote( receivedNote );
        ep.setNote( receivedNote, null );


        if( sentResponse == null ) {
            if( log.isDebugEnabled() )
                log.debug("No send() prior to receive(), no data buffer");
            // No sent() was done prior to receive.
            msg.reset();
            msg.end();
            sentResponse = msg;
        }
        
        sentResponse.processHeader();


        if( log.isTraceEnabled() )
            sentResponse.dump("received response ");


        if( msg != sentResponse ) {
            log.error( "Error, in JNI mode the msg used for receive() must be identical with the one used for send()");
        }

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     *  in the same buffer
     */
    public int receive( Msg msg, MsgContext ep )
        throws IOException
    {
        Msg sentResponse=(Msg)ep.getNote( receivedNote );
        ep.setNote( receivedNote, null );


        if( sentResponse == null ) {
            if( log.isDebugEnabled() )
                log.debug("No send() prior to receive(), no data buffer");
            // No sent() was done prior to receive.
            msg.reset();
            msg.end();
            sentResponse = msg;
        }
        
        sentResponse.processHeader();


        if( log.isTraceEnabled() )
            sentResponse.dump("received response ");


        if( msg != sentResponse ) {
            log.error( "Error, in JNI mode the msg used for receive() must be identical with the one used for send()");
        }

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Related Classes of org.apache.jk.core.Msg

org.apache.jk.common.ChannelJni

org.apache.jk.common.Shm

org.apache.jk.server.JkCoyoteHandler

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