Examples of org.apache.avalon.framework.service.ServiceSelector

Package org.apache.avalon.framework.service

Examples of org.apache.avalon.framework.service.ServiceSelector

org.apache.avalon.framework.service.ServiceSelector
A ServiceSelector selects {@link Object}s based on a supplied policy. The contract is that all the {@link Object}s implement the same role. @author Avalon Development Team @version CVS $Revision: 1.16 $ $Date: 2004/02/11 14:34:25 $ @see org.apache.avalon.framework.service.Serviceable @see org.apache.avalon.framework.service.ServiceSelector

        instance.setCopletData(copletData);
        
        // now lookup the adapter
        final String adapterName = copletData.getCopletBaseData().getCopletAdapterName();
        CopletAdapter adapter = null;
        ServiceSelector adapterSelector = null;
        try {
            adapterSelector = (ServiceSelector) this.manager.lookup( CopletAdapter.ROLE + "Selector");
            adapter = (CopletAdapter)adapterSelector.select( adapterName );
            adapter.init( instance );
            adapter.login( instance );
        } catch (ServiceException ce) {
            throw new ProcessingException("Unable to lookup coplet adapter selector or adaptor.", ce);
        } finally {
            if ( adapterSelector != null) {
                adapterSelector.release( adapter );
            }
            this.manager.release( adapterSelector );
        }
        
        PortalService service = null;

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            }
        }


        Tag tag = (Tag) tagStack.pop();
        if (tag != null) {
            ServiceSelector tagSelector = (ServiceSelector)tagSelectorStack.pop();
            try {
                if (saxFragment != null) {
                    //start Iteration
                    IterationTag iterTag = (IterationTag) tag;
                    XMLDeserializer xmlDeserializer = null;
                    try {
                        xmlDeserializer = (XMLDeserializer) manager.lookup(XMLDeserializer.ROLE);
                        xmlDeserializer.setConsumer(this);
                        do {
                            xmlDeserializer.deserialize(saxFragment);
                        } while (iterTag.doAfterBody() != Tag.SKIP_BODY);


                    } catch (ServiceException e) {
                        throw new SAXException("lookup XMLDeserializer failed", e);
                    }
                    finally {
                        if (xmlDeserializer != null)
                            manager.release(xmlDeserializer);
                    }
                }
                tag.doEndTag(namespaceURI, localName, qName);
                currentTag = tag.getParent();


                if (tag == currentConsumer) {
                    // search next XMLConsumer
                    Tag loop = currentTag;
                    for (; loop != null; loop = loop.getParent()) {
                        if (loop instanceof XMLConsumer)
                            break;
                    }
                    if (loop != null) {
                        currentConsumer = (XMLConsumer) loop;
                    } else {
                        currentConsumer = this.xmlConsumer;
                    }
                }
            } finally {
                getLogger().debug("endElement: release Tag");
                tagSelector.release(tag);


                tagNamespaceSelector.release(tagSelector);


                if (transformerSelector != null && tag instanceof XMLProducer) {
                    getLogger().debug("endElement: release transformer");

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        while (!tagStack.isEmpty()) {
            Tag tag = (Tag) tagStack.pop();
            if (tag == null)
                continue;
            ServiceSelector tagSelector = (ServiceSelector)tagSelectorStack.pop();
            tagSelector.release(tag);


            tagNamespaceSelector.release(tagSelector);
        }


        while (!tagTransformerStack.isEmpty()) {

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            return;
        }


        Tag tag = null;
        if (namespaceURI != null && namespaceURI.length() > 0) {
            ServiceSelector tagSelector = null;
            Transformer tagTransformer = null;
            try {
                tagSelector = (ServiceSelector) tagNamespaceSelector.select(namespaceURI);
                tagSelectorStack.push(tagSelector);


                // namespace matches tag library, lookup tag now.
                tag = (Tag) tagSelector.select(localName);


                // tag found, setup Tag and connect it to pipeline
                tag.setParent(currentTag);
                tag.setup(this.resolver, this.objectModel, this.parameters);

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        throws SAXException {    
            
        if ( Web3.URI.equals( uri ) && !this.error ) { 
            switch ( Integer.parseInt( (String) this.tags.get( loc ))) {
                case INCLUDE_ELEM: 
                    ServiceSelector r3sc = null;
                    try {
                        r3sc = (ServiceSelector) 
                            this.manager.lookup ( Web3DataSource.ROLE + "Selector");
                        this.web3source = (Web3DataSource) r3sc.select( this.backend );
                        this.connection = this.web3source.getWeb3Client();
                        this.repository = (JCO.Repository) this.connection.getRepository();
                        this.functionT = this.repository.getFunctionTemplate( 
                            a.getValue( Web3.INCLUDE_NAME_ATTR ) );
                        this.streamer  = (null == a.getValue( Web3.INCLUDE_CLASS_ATTR )) ?

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    {
        if ( Web3.URI.equals(uri) && !this.error ) {
            switch ( Integer.parseInt( (String) this.tags.get( loc ))) {
                case INCLUDE_ELEM: 
                    Web3Streamer w3s = null;
                    ServiceSelector streamerSelector = null;
                    try {
                        this.connection.execute( this.function );
                        streamerSelector = 
                            (ServiceSelector) 
                            this.manager.lookup( Web3Streamer.ROLE + "Selector" );
                        w3s = (Web3Streamer) streamerSelector.select( this.streamer );
                        w3s.stream( this.function,  super.contentHandler );
                    } 
                    catch (Exception x) {
                        this.attributes.clear();
                        super.contentHandler.startElement(uri, Web3.ABAP_EXCEPTION_ELEM, 
                            Web3.ABAP_EXCEPTION_ELEM, this.attributes);
                        super.contentHandler.characters(x.getMessage ().toCharArray(), 
                            0, x.getMessage ().length());
                        super.contentHandler.endElement(uri, Web3.ABAP_EXCEPTION_ELEM, 
                            Web3.ABAP_EXCEPTION_ELEM);                    
                        getLogger().error(x.getMessage(), x);
                    } 
                    finally {
                        this.web3source.releaseWeb3Client( this.connection );
                        if ( null != streamerSelector ) {
                            streamerSelector.release( w3s );
                        }
                        manager.release( streamerSelector );
                    }
                    this.connection = null;
                    this.repository = null;

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     * Store a key/value pair in the output attributes. We prefix the key
     * with the name of this class to prevent potential name collisions.
     */
    protected void setOutputAttribute(Map objectModel, String outputMode, String key, Object value) {


        ServiceSelector outputSelector = null;
        OutputModule output = null;
        try {
            outputSelector = (ServiceSelector) this.manager.lookup(OUTPUT_MODULE_SELECTOR);
            if (outputMode != null && outputSelector != null && outputSelector.isSelectable(outputMode)){
                output = (OutputModule) outputSelector.select(outputMode);
            }
            output.setAttribute( null, objectModel, key, value );
        } catch (Exception e) {
                if (getLogger().isWarnEnabled()) {
                    getLogger().warn("Could not select output mode "
                                     + outputMode + ":" + e.getMessage());
                }
        } finally {
            if (outputSelector != null) {
                if (output != null)
                    outputSelector.release(output);
                this.manager.release(outputSelector);
            }
         }
    }

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        } else {
            Object[] values;
            String cname = getOutputName( tableConf, column.columnConf );


            // obtain input module and read values
            ServiceSelector inputSelector = null;
            InputModule input = null;
            try {
                inputSelector = (ServiceSelector) this.manager.lookup(INPUT_MODULE_SELECTOR);
                if (column.mode != null && inputSelector != null && inputSelector.isSelectable(column.mode)){
                    input = (InputModule) inputSelector.select(column.mode);
                }


                if (column.isSet) {
                    if (getLogger().isDebugEnabled())
                        getLogger().debug( "Trying to set column " + cname +" from "+column.mode+" using getAttributeValues method");
                    values = input.getAttributeValues( cname, column.modeConf, objectModel );
                } else {
                    if (getLogger().isDebugEnabled())
                        getLogger().debug( "Trying to set column " + cname +" from "+column.mode+" using getAttribute method");
                    values = new Object[1];
                    values[0] = input.getAttribute( cname, column.modeConf, objectModel );
                }


                if ( values != null ) {
                    for ( int i = 0; i < values.length; i++ ) {
                        if (getLogger().isDebugEnabled())
                            getLogger().debug( "Setting column " + cname + " [" + i + "] " + values[i] );
                    }
                }


            } finally {
                if (inputSelector != null) {
                    if (input != null)
                        inputSelector.release(input);
                    this.manager.release(inputSelector);
                }
            }


            return values;

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            if (conn.getAutoCommit()==false)
                conn.commit();


            // obtain output mode module and rollback output
            ServiceSelector outputSelector = null;
            OutputModule output = null;
            try {
                outputSelector = (ServiceSelector) this.manager.lookup(OUTPUT_MODULE_SELECTOR);
                if (outputMode != null && outputSelector != null && outputSelector.isSelectable(outputMode)){
                    output = (OutputModule) outputSelector.select(outputMode);
                }
                output.commit(null, objectModel);
            } catch (Exception e) {
                if (getLogger().isWarnEnabled()) {
                    getLogger().warn("Could not select output mode "
                                     + outputMode + ":" + e.getMessage());
                }
            } finally {
                if (outputSelector != null) {
                    if (output != null)
                        outputSelector.release(output);
                    this.manager.release(outputSelector);
                }
            }


        } catch (Exception e) {
            failed = true;
            if ( conn != null ) {
                try {
                    if (getLogger().isDebugEnabled()) {
                        getLogger().debug( "Rolling back transaction. Caused by " + e.getMessage() );
                        e.printStackTrace();
                    }
                    conn.rollback();
                    results = null;


                    // obtain output mode module and commit output
                    ServiceSelector outputSelector = null;
                    OutputModule output = null;
                    try {
                        outputSelector = (ServiceSelector) this.manager.lookup(OUTPUT_MODULE_SELECTOR);
                        if (outputMode != null && outputSelector != null && outputSelector.isSelectable(outputMode)){
                            output = (OutputModule) outputSelector.select(outputMode);
                        }
                        output.rollback( null, objectModel, e);
                    } catch (Exception e2) {
                        if (getLogger().isWarnEnabled()) {
                            getLogger().warn("Could not select output mode "
                                       + outputMode + ":" + e2.getMessage());
                        }
                    } finally {
                        if (outputSelector != null) {
                            if (output != null)
                                outputSelector.release(output);
                            this.manager.release(outputSelector);
                        }
                    }


                } catch (SQLException se) {

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        XMLUtils.startElement(handler, "content");
        CopletInstanceData cid = ((CopletLayout)layout).getCopletInstanceData();


        final String adapterName = cid.getCopletData().getCopletBaseData().getCopletAdapterName();
        CopletAdapter copletAdapter = null;
        ServiceSelector adapterSelector = null;
        try {
            adapterSelector = (ServiceSelector) this.manager.lookup(CopletAdapter.ROLE + "Selector");
            copletAdapter = (CopletAdapter) adapterSelector.select(adapterName);
            copletAdapter.toSAX(cid, new IncludeXMLConsumer(handler));
        } catch (ServiceException ce) {
            throw new SAXException("Unable to lookup component.", ce);
        } finally {
            if (null != copletAdapter) {
                adapterSelector.release(copletAdapter);
            }
            this.manager.release(adapterSelector);
        }


        XMLUtils.endElement(handler, "content");

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