Examples of org.apache.cayenne.access.DataDomain

org.apache.cayenne.access.DataDomain
DataDomain performs query routing functions in Cayenne. DataDomain creates single data source abstraction hiding multiple physical data sources from the user. When a child DataContext sends a query to the DataDomain, it is transparently routed to an appropriate DataNode. @author Andrus Adamchik

     * Normally Cayenne applications don't need to access DataSource or any other JDBC
     * code directly, however in some unusual conditions it may be needed, and this method
     * provides a shortcut to raw JDBC.
     */
    public DataSource getDataSource(String dataNodeName) {
        DataDomain domain = getDataDomain();


        if (dataNodeName != null) {
            DataNode node = domain.getNode(dataNodeName);
            if (node == null) {
                throw new IllegalArgumentException("Unknown DataNode name: "
                        + dataNodeName);
            }


            return node.getDataSource();
        }


        else {
            Collection<DataNode> nodes = domain.getDataNodes();
            if (nodes.size() != 1) {
                throw new IllegalArgumentException(
                        "If DataNode name is not specified, DataDomain must have exactly 1 DataNode. Actual node count: "
                                + nodes.size());
            }

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        DataChannel channel = provider.get();
        assertNotNull(channel);


        assertTrue(channel instanceof DataDomain);


        DataDomain domain = (DataDomain) channel;
        assertSame(eventManager, domain.getEventManager());
        assertEquals(2, domain.getDataMaps().size());
        assertTrue(domain.getDataMaps().contains(map1));
        assertTrue(domain.getDataMaps().contains(map2));


        assertEquals(2, domain.getDataNodes().size());
        DataNode node1 = domain.getNode("node1");
        assertNotNull(node1);
        assertEquals(1, node1.getDataMaps().size());
        assertSame(map1, node1.getDataMaps().iterator().next());
        assertSame(node1, domain.lookupDataNode(map1));
        assertEquals(nodeDescriptor1.getDataSourceFactoryType(), node1
                .getDataSourceFactory());
        assertNotNull(node1.getDataSource());
        assertEquals(nodeDescriptor1.getParameters(), node1.getDataSourceLocation());


        assertEquals(nodeDescriptor1.getSchemaUpdateStrategyType(), node1
                .getSchemaUpdateStrategyName());
        assertNotNull(node1.getSchemaUpdateStrategy());
        assertEquals(nodeDescriptor1.getSchemaUpdateStrategyType(), node1
                .getSchemaUpdateStrategy()
                .getClass()
                .getName());


        assertNotNull(node1.getAdapter());
        assertEquals(OracleAdapter.class, node1.getAdapter().getClass());


        DataNode node2 = domain.getNode("node2");
        assertNotNull(node2);
        assertEquals(1, node2.getDataMaps().size());
        assertSame(map2, node2.getDataMaps().iterator().next());
        assertSame(node2, domain.lookupDataNode(map2));
        assertNull(node2.getDataSourceFactory());
        assertNotNull(node2.getDataSource());
        assertEquals(nodeDescriptor2.getParameters(), node2.getDataSourceLocation());
        assertEquals(SkipSchemaUpdateStrategy.class.getName(), node2
                .getSchemaUpdateStrategyName());

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            InputSource in = new InputSource(stream);
            in.setSystemId(DATA_MAPS_REQUIREING_SCHEMA_SETUP[i]);
            maps[i] = new MapLoader().loadDataMap(in);
        }


        this.domain = new DataDomain("temp");
        domain.setEventManager(new DefaultEventManager(2));
        domain.setEntitySorter(new AshwoodEntitySorter());
        domain.setQueryCache(new MapQueryCache(50));


        try {

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                    .getMessage());
        }
    }


    protected DataDomain createDataDomain(String name) {
        return new DataDomain(name);
    }

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        if (logger.isDebugEnabled()) {
            logger.debug("finished configuration loading in " + (t1 - t0) + " ms.");
        }


        DataChannelDescriptor descriptor = descriptorMerger.merge(descriptors);
        DataDomain dataDomain = createDataDomain(descriptor.getName());


        dataDomain.setQueryCache(new NestedQueryCache(queryCache));
        dataDomain.setEntitySorter(injector.getInstance(EntitySorter.class));
        dataDomain.setEventManager(injector.getInstance(EventManager.class));


        dataDomain.initWithProperties(descriptor.getProperties());


        for (DataMap dataMap : descriptor.getDataMaps()) {
            dataDomain.addDataMap(dataMap);
        }


        dataDomain.getEntityResolver().applyDBLayerDefaults();
        dataDomain.getEntityResolver().applyObjectLayerDefaults();


        for (DataNodeDescriptor nodeDescriptor : descriptor.getNodeDescriptors()) {
            DataNode dataNode = new DataNode(nodeDescriptor.getName());


            dataNode.setJdbcEventLogger(jdbcEventLogger);
            dataNode.setDataSourceLocation(nodeDescriptor.getParameters());


            DataSource dataSource = dataSourceFactory.getDataSource(nodeDescriptor);


            dataNode.setDataSourceFactory(nodeDescriptor.getDataSourceFactoryType());
            dataNode.setDataSource(dataSource);


            // schema update strategy
            String schemaUpdateStrategyType = nodeDescriptor
                    .getSchemaUpdateStrategyType();


            if (schemaUpdateStrategyType == null) {
                dataNode.setSchemaUpdateStrategy(defaultSchemaUpdateStrategy);
                dataNode.setSchemaUpdateStrategyName(defaultSchemaUpdateStrategy
                        .getClass()
                        .getName());
            }
            else {
                SchemaUpdateStrategy strategy = objectFactory.newInstance(
                        SchemaUpdateStrategy.class,
                        schemaUpdateStrategyType);
                dataNode.setSchemaUpdateStrategyName(schemaUpdateStrategyType);
                dataNode.setSchemaUpdateStrategy(strategy);
            }


            // DbAdapter
            dataNode.setAdapter(adapterFactory.createAdapter(nodeDescriptor, dataSource));


            // DataMaps
            for (String dataMapName : nodeDescriptor.getDataMapNames()) {
                dataNode.addDataMap(dataDomain.getDataMap(dataMapName));
            }


            dataDomain.addNode(dataNode);
        }


        for (DataChannelFilter filter : filters) {
            dataDomain.addFilter(filter);
        }


        return dataDomain;
    }

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            return "UntitledDomain";
        }


        @Override
        protected Object create(String name, Object namingContext) {
            return new DataDomain(name);
        }

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            // top level object of the project
            if (namingContext == null) {
                return false;
            }


            DataDomain domain = (DataDomain) namingContext;
            return domain.getMap(name) != null;
        }

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    public RuntimeSaveDelegate() {
        super();
    }


    protected DataDomain findDomain(String domainName) {
        DataDomain domain = config.getDomain(domainName);
        if (domain == null) {
            throw new IllegalArgumentException("Can't find DataDomain: " + domainName);
        }


        return domain;

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        return domain;
    }


    protected DataNode findNode(String domainName, String nodeName) {
        DataDomain domain = findDomain(domainName);
        DataNode node = domain.getNode(nodeName);
        if (node == null) {
            throw new IllegalArgumentException("Can't find DataNode: "
                    + domainName
                    + "."
                    + nodeName);

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            return new DataNode(name);
        }


        @Override
        protected boolean isNameInUse(String name, Object namingContext) {
            DataDomain domain = (DataDomain) namingContext;
            return domain.getNode(name) != null;
        }

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