/*
* Copyright 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.registry.event.core.sharedmemory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.registry.core.ActionConstants;
import org.wso2.carbon.registry.event.core.EventBroker;
import org.wso2.carbon.registry.event.core.Message;
import org.wso2.carbon.registry.event.core.exception.EventBrokerConfigurationException;
import org.wso2.carbon.registry.event.core.sharedmemory.util.SharedMemoryCacheUtil;
import org.wso2.carbon.registry.event.core.util.EventBrokerConstants;
import org.wso2.carbon.registry.event.core.delivery.DeliveryManager;
import org.wso2.carbon.registry.event.core.delivery.MatchingManager;
import org.wso2.carbon.registry.event.core.exception.EventBrokerException;
import org.wso2.carbon.registry.event.core.internal.delivery.Worker;
import org.wso2.carbon.registry.event.core.internal.util.JavaUtil;
import org.wso2.carbon.registry.event.core.internal.util.EventBrokerHolder;
import org.wso2.carbon.registry.event.core.notify.NotificationManager;
import org.wso2.carbon.registry.event.core.subscription.Subscription;
import org.wso2.carbon.user.api.UserRealm;
import org.wso2.carbon.user.api.UserStoreException;
import org.wso2.carbon.context.CarbonContext;
import org.wso2.carbon.CarbonConstants;
import javax.cache.Cache;
import java.util.List;
import java.util.concurrent.ExecutorService;
/**
* shared memory implementation of the delivery manager.
*/
public class SharedMemoryDeliveryManager implements DeliveryManager {
private static final Log log = LogFactory.getLog(SharedMemoryDeliveryManager.class);
private ExecutorService executor;
private NotificationManager notificationManager;
private String topicStoragePath;
private EventBroker eventBroker;
public SharedMemoryDeliveryManager(ExecutorService executor, String topicStoragePath) {
this.executor = executor;
this.topicStoragePath = topicStoragePath;
}
public void subscribe(Subscription subscription) throws EventBrokerException {
String resourcePath = JavaUtil.getResourcePath(subscription.getTopicName(), this.topicStoragePath);
try {
UserRealm userRealm =
EventBrokerHolder.getInstance().getRealmService().getTenantUserRealm
(CarbonContext.getThreadLocalCarbonContext().getTenantId());
String userName = subscription.getOwner();
// trim the domain part if it is there.
if (userName.lastIndexOf("@") != -1){
userName = userName.substring(0, userName.lastIndexOf("@"));
}
if (userName.equals(CarbonConstants.REGISTRY_SYSTEM_USERNAME) ||
userRealm.getAuthorizationManager()
.isUserAuthorized(userName, resourcePath, EventBrokerConstants.EB_PERMISSION_SUBSCRIBE) ||
userRealm.getAuthorizationManager().isUserAuthorized(userName, resourcePath, ActionConstants.GET)) {
getMatchingManager().addSubscription(subscription);
} else {
throw new EventBrokerException("User " + CarbonContext.getThreadLocalCarbonContext().getUsername()
+ " is not allowed to subscribes to " + subscription.getTopicName());
}
} catch (UserStoreException e) {
throw new EventBrokerException("Can not access the user store manager",e);
}
}
public void setNotificationManager(NotificationManager notificationManager) {
this.notificationManager = notificationManager;
}
public void publish(Message message, String topicName, int deliveryMode) throws EventBrokerException {
String resourcePath = JavaUtil.getResourcePath(topicName, this.topicStoragePath);
try {
UserRealm userRealm =
EventBrokerHolder.getInstance().getRealmService().getTenantUserRealm
(CarbonContext.getThreadLocalCarbonContext().getTenantId());
String userName = CarbonContext.getThreadLocalCarbonContext().getUsername();
if (userName == null){
userName = CarbonConstants.REGISTRY_SYSTEM_USERNAME;
}
if (userName.equals(CarbonConstants.REGISTRY_SYSTEM_USERNAME) ||
userRealm.getAuthorizationManager().isUserAuthorized(
userName,
resourcePath,
EventBrokerConstants.EB_PERMISSION_PUBLISH)) {
List<Subscription> subscriptions = getMatchingManager().getMatchingSubscriptions(topicName);
for (Subscription subscription : subscriptions) {
String verified = SharedMemorySubscriptionStorage
.getSubscriptionIDTopicNameCache().get(subscription.getId()+"-notVerfied");
if(verified != null && "false".equalsIgnoreCase(verified)){
subscription.addProperty("notVerfied", "false");
}
this.executor.submit(new Worker(this.notificationManager, message, subscription));
}
} else {
throw new EventBrokerException("User " + CarbonContext.getThreadLocalCarbonContext().getUsername()
+ " is not allowed to publish to " + topicName);
}
} catch (UserStoreException e) {
throw new EventBrokerException("Can not access the user store manager",e);
}
}
public void setMatchingManager(MatchingManager matchingManager) {
}
public void unSubscribe(String id) throws EventBrokerException {
getMatchingManager().unSubscribe(id);
}
public void cleanUp() {
// nothing to clean up in the shared memory implementation.
}
public void renewSubscription(Subscription subscription) throws EventBrokerException {
getMatchingManager().renewSubscription(subscription);
}
public void initializeTenant() throws EventBrokerException {
getMatchingManager().initializeTenant();
}
private static Cache<Integer, SharedMemoryMatchingManager> getInMemoryMatchingCache() {
return SharedMemoryCacheUtil.getInMemoryMatchingCache();
}
public synchronized MatchingManager getMatchingManager() throws EventBrokerConfigurationException {
SharedMemoryMatchingManager inMemoryMatchingManager = getInMemoryMatchingCache().get(1);
if(inMemoryMatchingManager == null) {
inMemoryMatchingManager = new SharedMemoryMatchingManager();
getInMemoryMatchingCache().put(1, inMemoryMatchingManager);
}
try {
//call initialize tenant for super tenant
inMemoryMatchingManager.initializeTenant();
} catch (EventBrokerException e) {
throw new EventBrokerConfigurationException("Can not initialize the in memory mathing manager",e);
}
return inMemoryMatchingManager;
}
public void setEventBroker(EventBroker eventbroker) {
this.eventBroker = eventbroker;
}
}