Examples with MultiDataStore org.apache.jackrabbit.core.data.MultiDataStore used on opensource projects

Example 1 with MultiDataStore

use of org.apache.jackrabbit.core.data.MultiDataStore in project jackrabbit by apache.

the class RepositoryConfigurationParser method getDataStoreFactory.

/**
     * Parses data store configuration. Data store configuration uses the following format:
     * <pre>
     *   &lt;DataStore class="..."&gt;
     *     &lt;param name="..." value="..."&gt;
     *     ...
     *   &lt;/DataStore&gt;
     * </pre>
     * Its also possible to configure a multi data store. The configuration uses following format:
     * <pre>
     *   &lt;DataStore class="org.apache.jackrabbit.core.data.MultiDataStore"&gt;
     *     &lt;param name="primary" value="org.apache.jackrabbit.core.data.db.XXDataStore"&gt;
     *         &lt;param name="..." value="..."&gt;
     *         ...
     *     &lt;/param&gt;
     *     &lt;param name="archive" value="org.apache.jackrabbit.core.data.db.XXDataStore"&gt;
     *         &lt;param name="..." value="..."&gt;
     *         ...
     *     &lt;/param&gt;
     *   &lt;/DataStore&gt;
     * </pre>
     * <p>
     * <code>DataStore</code> is a {@link #parseBeanConfig(Element,String) bean configuration}
     * element.
     *
     * @param parent configuration element
     * @param directory the repository directory
     * @return data store factory
     * @throws ConfigurationException if the configuration is broken
     */
protected DataStoreFactory getDataStoreFactory(final Element parent, final String directory) throws ConfigurationException {
    return new DataStoreFactory() {

        public DataStore getDataStore() throws RepositoryException {
            NodeList children = parent.getChildNodes();
            for (int i = 0; i < children.getLength(); i++) {
                Node child = children.item(i);
                if (child.getNodeType() == Node.ELEMENT_NODE && DATA_STORE_ELEMENT.equals(child.getNodeName())) {
                    BeanConfig bc = parseBeanConfig(parent, DATA_STORE_ELEMENT);
                    bc.setValidate(false);
                    DataStore store = bc.newInstance(DataStore.class);
                    if (store instanceof MultiDataStore) {
                        DataStore primary = null;
                        DataStore archive = null;
                        NodeList subParamNodes = child.getChildNodes();
                        for (int x = 0; x < subParamNodes.getLength(); x++) {
                            Node paramNode = subParamNodes.item(x);
                            if (paramNode.getNodeType() == Node.ELEMENT_NODE && (PRIMARY_DATASTORE_ATTRIBUTE.equals(paramNode.getAttributes().getNamedItem("name").getNodeValue()) || ARCHIVE_DATASTORE_ATTRIBUTE.equals(paramNode.getAttributes().getNamedItem("name").getNodeValue()))) {
                                try {
                                    Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
                                    Element newParent = document.createElement("parent");
                                    document.appendChild(newParent);
                                    Element datastoreElement = document.createElement(DATA_STORE_ELEMENT);
                                    newParent.appendChild(datastoreElement);
                                    NodeList childNodes = paramNode.getChildNodes();
                                    for (int y = 0; childNodes.getLength() > y; y++) {
                                        datastoreElement.appendChild(document.importNode(childNodes.item(y), true));
                                    }
                                    NamedNodeMap attributes = paramNode.getAttributes();
                                    for (int z = 0; attributes.getLength() > z; z++) {
                                        Node item = attributes.item(z);
                                        datastoreElement.setAttribute(CLASS_ATTRIBUTE, item.getNodeValue());
                                    }
                                    DataStore subDataStore = getDataStoreFactory(newParent, directory).getDataStore();
                                    if (!MultiDataStoreAware.class.isAssignableFrom(subDataStore.getClass())) {
                                        throw new ConfigurationException("Only MultiDataStoreAware datastore's can be used within a MultiDataStore.");
                                    }
                                    String type = getAttribute((Element) paramNode, NAME_ATTRIBUTE);
                                    if (PRIMARY_DATASTORE_ATTRIBUTE.equals(type)) {
                                        primary = subDataStore;
                                    } else if (ARCHIVE_DATASTORE_ATTRIBUTE.equals(type)) {
                                        archive = subDataStore;
                                    }
                                } catch (Exception e) {
                                    throw new ConfigurationException("Failed to parse the MultiDataStore element.", e);
                                }
                            }
                        }
                        if (primary == null || archive == null) {
                            throw new ConfigurationException("A MultiDataStore must have configured a primary and archive datastore");
                        }
                        ((MultiDataStore) store).setPrimaryDataStore(primary);
                        ((MultiDataStore) store).setArchiveDataStore(archive);
                    }
                    store.init(directory);
                    return store;
                }
            }
            return null;
        }
    };
}