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package eu.dnetlib.enabling.is.sn;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.LinkedBlockingQueue;
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import javax.xml.ws.wsaddressing.W3CEndpointReference;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* Asynchronous but in-order delivery of notifications.
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*
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* @author marko
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*
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*/
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public class AsynchronousNotificationSenderImpl extends AbstractNotificationSender implements Runnable { // NOPMD
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(AsynchronousNotificationSenderImpl.class); // NOPMD by marko on 11/24/08 5:02 PM
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/**
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* Encapsulates an notification job.
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*
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* @author marko
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*
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*/
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class NotificationJob {
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/**
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* notification destination.
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*/
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private final transient W3CEndpointReference destination;
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/**
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* notification message.
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*/
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private final transient NotificationMessage message;
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/**
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* construct a new notification job.
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*
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* @param destination destination
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* @param message message
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*/
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public NotificationJob(final W3CEndpointReference destination, final NotificationMessage message) {
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super();
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this.destination = destination;
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this.message = message;
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}
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public W3CEndpointReference getDestination() {
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return destination;
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}
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public NotificationMessage getMessage() {
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return message;
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}
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}
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/**
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* job queue.
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*/
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private BlockingQueue<NotificationJob> jobQueue = new LinkedBlockingQueue<NotificationJob>();
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.NotificationSender#send(javax.xml.ws.wsaddressing.W3CEndpointReference,
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* eu.dnetlib.enabling.is.sn.NotificationMessage)
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*/
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@Override
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public void send(final W3CEndpointReference destination, final NotificationMessage message) {
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log.debug("queuing asynchronous notification");
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try {
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jobQueue.put(new NotificationJob(destination, message));
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} catch (InterruptedException e) {
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log.warn("possibly lost notification", e);
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}
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}
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/**
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* start this notification sender (called by spring lifecycle).
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*/
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void start() {
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new Thread(this).start(); // NOPMD
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}
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/**
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* {@inheritDoc}
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* @see java.lang.Runnable#run()
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*/
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@Override
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public void run() {
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while (true) {
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try {
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final NotificationJob job = jobQueue.take();
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try {
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getInvoker().send(job.getDestination(), job.getMessage(), 0);
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} catch (javax.xml.ws.soap.SOAPFaultException t) {
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log.fatal("error sending notification to " + job.getDestination().toString(), t);
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}
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} catch (InterruptedException e) {
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log.warn("possibly lost notification", e);
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}
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}
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}
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public BlockingQueue<NotificationJob> getJobQueue() {
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return jobQueue;
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}
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public void setJobQueue(final BlockingQueue<NotificationJob> jobQueue) {
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this.jobQueue = jobQueue;
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}
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}
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