modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/PublisherFactory.java

/*
 *
 * 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.airavata.messaging.core;

import org.apache.airavata.common.exception.AiravataException;
import org.apache.airavata.common.utils.ServerSettings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class PublisherFactory {
    private static Logger log = LoggerFactory.getLogger(PublisherFactory.class);

    public static Publisher createActivityPublisher() throws AiravataException {
        String activityPublisher = ServerSettings.getStatusPublisher();

        if (activityPublisher == null) {
            String s = "Activity publisher is not specified";
            log.error(s);
            throw new AiravataException(s);
        }

        try {
            Class<? extends Publisher> aPublisher = Class.forName(activityPublisher).asSubclass(Publisher.class);
            return aPublisher.newInstance();
        } catch (Exception e) {
            String msg = "Failed to load the publisher from the publisher class property: " + activityPublisher;
            log.error(msg, e);
            throw new AiravataException(msg, e);
        }
    }

    public static Publisher createTaskLaunchPublisher() throws AiravataException {
        String taskLaunchPublisher = ServerSettings.getTaskLaunchPublisher();

        if (taskLaunchPublisher == null) {
            String s = "Task launch publisher is not specified";
            log.error(s);
            throw new AiravataException(s);
        }

        try {
            Class<? extends Publisher> aPublisher = Class.forName(taskLaunchPublisher).asSubclass(Publisher.class);
            return aPublisher.newInstance();
        } catch (Exception e) {
            String msg = "Failed to load the publisher from the publisher class property: " + taskLaunchPublisher;
            log.error(msg, e);
            throw new AiravataException(msg, e);
        }
    }
}