/*
* Copyright 2015 The Apache Software Foundation.
*
* Licensed 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.internal.delivery.inmemory;
import org.wso2.carbon.registry.core.ActionConstants;
import org.wso2.carbon.registry.event.core.Message;
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 java.util.List;
import java.util.concurrent.ExecutorService;
/**
* in memory implementation of the delivary manager.
*/
public class InMemoryDeliveryManager implements DeliveryManager {
private ExecutorService executor;
private NotificationManager notificationManager;
private MatchingManager matchingManager;
private String topicStoragePath;
public InMemoryDeliveryManager(ExecutorService executor, String topicStoragePath) {
this.executor = executor;
this.topicStoragePath = topicStoragePath;
}
public void subscribe(Subscription subscription) throws EventBrokerException {
String resoucePath = 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, resoucePath, EventBrokerConstants.EB_PERMISSION_SUBSCRIBE) ||
userRealm.getAuthorizationManager().isUserAuthorized(userName, resoucePath, ActionConstants.GET)) {
this.matchingManager.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");
}
}
public void setNotificationManager(NotificationManager notificationManager) {
this.notificationManager = notificationManager;
}
public void publish(Message message, String topicName, int deliveryMode) throws EventBrokerException {
String resoucePath = 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, resoucePath,
EventBrokerConstants.EB_PERMISSION_PUBLISH)) {
List<Subscription> subscriptions = this.matchingManager.getMatchingSubscriptions(topicName);
for (Subscription subscription : subscriptions) {
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");
}
}
public void setMatchingManager(MatchingManager matchingManager) {
this.matchingManager = matchingManager;
}
public void unSubscribe(String id) throws EventBrokerException {
this.matchingManager.unSubscribe(id);
}
public void cleanUp() {
// nothing to clean up in the inmemory implementation.
}
public void renewSubscription(Subscription subscription) throws EventBrokerException {
this.matchingManager.renewSubscription(subscription);
}
public void initializeTenant() throws EventBrokerException {
this.matchingManager.initializeTenant();
}
}