/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.syncope.core.init;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import javassist.NotFoundException;
import org.apache.commons.lang.SerializationUtils;
import org.apache.syncope.core.persistence.beans.ConnInstance;
import org.apache.syncope.core.persistence.beans.ExternalResource;
import org.apache.syncope.core.persistence.dao.ResourceDAO;
import org.apache.syncope.core.propagation.ConnectorFacadeProxy;
import org.apache.syncope.core.util.ApplicationContextManager;
import org.apache.syncope.core.util.ConnBundleManager;
import org.apache.syncope.types.ConnConfProperty;
import org.identityconnectors.common.l10n.CurrentLocale;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
/**
* Load ConnId connector instances.
*/
@Component
public class ConnInstanceLoader {
private static final Logger LOG = LoggerFactory.getLogger(ConnInstanceLoader.class);
@Autowired
private ResourceDAO resourceDAO;
@Autowired
private ConnBundleManager connBundleManager;
private DefaultListableBeanFactory getBeanFactory() {
ConfigurableApplicationContext context = ApplicationContextManager.getApplicationContext();
return (DefaultListableBeanFactory) context.getBeanFactory();
}
private String getBeanName(final ExternalResource resource) {
return String.format("connInstance-%d-%s", resource.getConnector().getId(), resource.getName());
}
/**
* Get a live connector bean that is registered with the given resource.
*
* @param resource the resource.
* @return live connector bran for given resource
* @throws BeansException in case the connector is not registered in the context
*/
public ConnectorFacadeProxy getConnector(final ExternalResource resource) throws BeansException, NotFoundException {
// Try to re-create connector bean from underlying resource
// (useful for managing failover scenarios)
if (!getBeanFactory().containsBean(getBeanName(resource))) {
registerConnector(resource);
}
return (ConnectorFacadeProxy) getBeanFactory().getBean(getBeanName(resource));
}
public ConnectorFacadeProxy createConnectorBean(final ExternalResource resource) throws NotFoundException {
final Set<ConnConfProperty> configuration = new HashSet<ConnConfProperty>();
// to be used to control managed prop (needed by overridden mechanism)
final Set<String> propertyNames = new HashSet<String>();
// get overridden connector configuration properties
for (ConnConfProperty prop : resource.getConfiguration()) {
if (!propertyNames.contains(prop.getSchema().getName())) {
configuration.add(prop);
propertyNames.add(prop.getSchema().getName());
}
}
final ConnInstance connInstance = resource.getConnector();
// get connector configuration properties
for (ConnConfProperty prop : connInstance.getConfiguration()) {
if (!propertyNames.contains(prop.getSchema().getName())) {
configuration.add(prop);
propertyNames.add(prop.getSchema().getName());
}
}
return createConnectorBean(connInstance, configuration);
}
/**
* Create connector bean starting from connector instance and configuration properties. This method must be used to
* create a connector instance without any linked external resource.
*
* @param connInstance connector instance.
* @param configuration configuration properties.
* @return connector facade proxy.
* @throws NotFoundException when not able to fetch all the required data.
*/
public ConnectorFacadeProxy createConnectorBean(final ConnInstance connInstance,
final Set<ConnConfProperty> configuration) throws NotFoundException {
final ConnInstance connInstanceClone = (ConnInstance) SerializationUtils.clone(connInstance);
connInstanceClone.setConfiguration(configuration);
return new ConnectorFacadeProxy(connInstanceClone, connBundleManager);
}
public void registerConnector(final ExternalResource resource) throws NotFoundException {
final ConnectorFacadeProxy connector = createConnectorBean(resource);
LOG.debug("Connector to be registered: {}", connector);
final String beanName = getBeanName(resource);
if (getBeanFactory().containsSingleton(beanName)) {
unregisterConnector(beanName);
}
getBeanFactory().registerSingleton(beanName, connector);
LOG.debug("Successfully registered bean {}", beanName);
}
public void unregisterConnector(final String id) {
getBeanFactory().destroySingleton(id);
}
@Transactional(readOnly = true)
public void load() {
// This is needed to avoid encoding problems when sending error
// messages via REST
CurrentLocale.set(Locale.ENGLISH);
// Next load all resource-specific connectors.
for (ExternalResource resource : resourceDAO.findAll()) {
try {
LOG.info("Registering resource-connector pair {}-{}", resource, resource.getConnector());
registerConnector(resource);
} catch (Exception e) {
LOG.error("While registering resource-connector pair {}-{}", new Object[] { resource,
resource.getConnector(), e });
}
}
LOG.info("Done loading {} connectors.", getBeanFactory().getBeansOfType(ConnectorFacadeProxy.class).size());
}
}