001/*
002 * (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Vladimir Pasquier <vpasquier@nuxeo.com>
016 */
017package org.nuxeo.binary.metadata.internals;
018
019import org.apache.commons.logging.Log;
020import org.apache.commons.logging.LogFactory;
021import org.nuxeo.binary.metadata.api.BinaryMetadataConstants;
022import org.nuxeo.binary.metadata.api.BinaryMetadataService;
023import org.nuxeo.runtime.api.Framework;
024import org.nuxeo.runtime.management.metrics.MetricInvocationHandler;
025import org.nuxeo.runtime.model.ComponentContext;
026import org.nuxeo.runtime.model.ComponentInstance;
027import org.nuxeo.runtime.model.DefaultComponent;
028
029/**
030 * Binary metadata component which registers all binary metadata contributions.
031 *
032 * @since 7.1
033 */
034public class BinaryMetadataComponent extends DefaultComponent {
035
036    private static final Log log = LogFactory.getLog(BinaryMetadataComponent.class);
037
038    protected static BinaryMetadataComponent self;
039
040    protected BinaryMetadataService metadataService = new BinaryMetadataServiceImpl();
041
042    protected final MetadataMappingRegistry mappingRegistry = new MetadataMappingRegistry();
043
044    protected final MetadataProcessorRegistry processorRegistry = new MetadataProcessorRegistry();
045
046    protected final MetadataRuleRegistry ruleRegistry = new MetadataRuleRegistry();
047
048    @Override
049    public void activate(ComponentContext context) {
050        super.activate(context);
051        if (Boolean.valueOf(Framework.getProperty(BinaryMetadataConstants.BINARY_METADATA_MONITOR,
052                Boolean.toString(log.isTraceEnabled())))) {
053            metadataService = MetricInvocationHandler.newProxy(metadataService, BinaryMetadataService.class);
054        }
055        self = this;
056    }
057
058    @Override
059    public void deactivate(ComponentContext context) {
060        self = null;
061        super.deactivate(context);
062    }
063
064    @Override
065    public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) {
066        if (BinaryMetadataConstants.METADATA_MAPPING_EP.equals(extensionPoint)) {
067            mappingRegistry.addContribution((MetadataMappingDescriptor) contribution);
068        } else if (BinaryMetadataConstants.METADATA_RULES_EP.equals(extensionPoint)) {
069            ruleRegistry.addContribution((MetadataRuleDescriptor) contribution);
070        } else if (BinaryMetadataConstants.METADATA_PROCESSORS_EP.equals(extensionPoint)) {
071            processorRegistry.addContribution((MetadataProcessorDescriptor) contribution);
072        } else {
073            log.error("Unknown extension point " + extensionPoint);
074        }
075    }
076
077    @Override
078    public void unregisterContribution(Object contribution, String extensionPoint, ComponentInstance contributor) {
079        if (BinaryMetadataConstants.METADATA_MAPPING_EP.equals(extensionPoint)) {
080            mappingRegistry.removeContribution((MetadataMappingDescriptor) contribution);
081        } else if (BinaryMetadataConstants.METADATA_RULES_EP.equals(extensionPoint)) {
082            ruleRegistry.removeContribution((MetadataRuleDescriptor) contribution);
083        } else if (BinaryMetadataConstants.METADATA_PROCESSORS_EP.equals(extensionPoint)) {
084            processorRegistry.removeContribution((MetadataProcessorDescriptor) contribution);
085        } else {
086            log.error("Unknown extension point " + extensionPoint);
087        }
088    }
089
090    @Override
091    public void applicationStarted(ComponentContext context) {
092        super.applicationStarted(context);
093        ruleRegistry.handleApplicationStarted();
094    }
095
096    @Override
097    public <T> T getAdapter(Class<T> adapter) {
098        if (adapter.isAssignableFrom(BinaryMetadataService.class)) {
099            return adapter.cast(metadataService);
100        }
101        return null;
102    }
103
104}