Java tutorial
/* * Copyright 2015 herd contributors * * 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.finra.herd.service.helper; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.Session; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jms.support.destination.DestinationResolver; import org.springframework.stereotype.Component; import org.finra.herd.core.helper.ConfigurationHelper; import org.finra.herd.model.dto.ConfigurationValue; @Component public class HerdJmsDestinationResolver implements DestinationResolver { private static final Logger LOGGER = LoggerFactory.getLogger(HerdJmsDestinationResolver.class); // The queue names that are used to annotate the JMS listener {@link HerdJmsMessageListener}. public static final String SQS_DESTINATION_HERD_INCOMING = "herd_incoming_queue"; public static final String SQS_DESTINATION_STORAGE_POLICY_SELECTOR_JOB_SQS_QUEUE = "storage_policy_selector_job_sqs_queue"; public static final String SQS_DESTINATION_SAMPLE_DATA_QUEUE = "sample_data_queue"; public static final String SQS_DESTINATION_SEARCH_INDEX_UPDATE_QUEUE = "search_index_update_queue"; @Autowired private ConfigurationHelper configurationHelper; @Override public Destination resolveDestinationName(Session session, String destinationName, boolean pubSubDomain) throws JMSException { String sqsQueueName; switch (destinationName) { case SQS_DESTINATION_HERD_INCOMING: // Get the incoming SQS queue name. sqsQueueName = getSqsQueueName(ConfigurationValue.HERD_NOTIFICATION_SQS_INCOMING_QUEUE_NAME); break; case SQS_DESTINATION_STORAGE_POLICY_SELECTOR_JOB_SQS_QUEUE: // Get the storage policy selector job SQS queue name. sqsQueueName = getSqsQueueName(ConfigurationValue.STORAGE_POLICY_SELECTOR_JOB_SQS_QUEUE_NAME); break; case SQS_DESTINATION_SAMPLE_DATA_QUEUE: // Get the storage policy selector job SQS queue name. sqsQueueName = getSqsQueueName(ConfigurationValue.SAMPLE_DATA_SQS_QUEUE_NAME); break; case SQS_DESTINATION_SEARCH_INDEX_UPDATE_QUEUE: // Get the storage policy selector job SQS queue name. sqsQueueName = getSqsQueueName(ConfigurationValue.SEARCH_INDEX_UPDATE_SQS_QUEUE_NAME); break; default: LOGGER.warn("Failed to resolve the destination name: \"%s\".", destinationName); sqsQueueName = ""; break; } Destination destination; try { destination = session.createQueue(sqsQueueName); } catch (Exception ex) { throw new IllegalStateException(String.format("Failed to resolve the SQS queue: \"%s\".", sqsQueueName), ex); } return destination; } /** * Returns the SQS queue name configured in the system per specified configuration value. Throws {@link IllegalStateException} if SQS queue name is * undefined. * * @return the SQS queue name */ private String getSqsQueueName(ConfigurationValue configurationValue) { String sqsQueueName = configurationHelper.getProperty(configurationValue); if (StringUtils.isBlank(sqsQueueName)) { throw new IllegalStateException( String.format("SQS queue name not found. Ensure the \"%s\" configuration entry is configured.", configurationValue.getKey())); } return sqsQueueName; } }