Example usage for org.springframework.amqp.core Queue isDurable

Introduction

In this page you can find the example usage for org.springframework.amqp.core Queue isDurable.

Prototype

public boolean isDurable() 

Source Link

Document

A durable queue will survive a server restart.

Usage

From source file:org.springframework.amqp.rabbit.core.RabbitAdmin.java

/**
 * Declares all the exchanges, queues and bindings in the enclosing application context, if any. It should be safe
 * (but unnecessary) to call this method more than once.
 *//*w ww.  ja  v  a  2  s . c o m*/
public void initialize() {

    if (this.applicationContext == null) {
        if (this.logger.isDebugEnabled()) {
            this.logger.debug(
                    "no ApplicationContext has been set, cannot auto-declare Exchanges, Queues, and Bindings");
        }
        return;
    }

    logger.debug("Initializing declarations");
    final Collection<Exchange> exchanges = applicationContext.getBeansOfType(Exchange.class).values();
    final Collection<Queue> queues = applicationContext.getBeansOfType(Queue.class).values();
    final Collection<Binding> bindings = applicationContext.getBeansOfType(Binding.class).values();

    for (Exchange exchange : exchanges) {
        if (!exchange.isDurable()) {
            logger.warn("Auto-declaring a non-durable Exchange (" + exchange.getName()
                    + "). It will be deleted by the broker if it shuts down, and can be redeclared by closing and reopening the connection.");
        }
        if (exchange.isAutoDelete()) {
            logger.warn("Auto-declaring an auto-delete Exchange (" + exchange.getName()
                    + "). It will be deleted by the broker if not in use (if all bindings are deleted), but will only be redeclared if the connection is closed and reopened.");
        }
    }

    for (Queue queue : queues) {
        if (!queue.isDurable()) {
            logger.warn("Auto-declaring a non-durable Queue (" + queue.getName()
                    + "). It will be redeclared if the broker stops and is restarted while the connection factory is alive, but all messages will be lost.");
        }
        if (queue.isAutoDelete()) {
            logger.warn("Auto-declaring an auto-delete Queue (" + queue.getName()
                    + "). It will be deleted by the broker if not in use, and all messages will be lost.  Redeclared when the connection is closed and reopened.");
        }
        if (queue.isExclusive()) {
            logger.warn("Auto-declaring an exclusive Queue (" + queue.getName()
                    + "). It cannot be accessed by consumers on another connection, and will be redeclared if the connection is reopened.");
        }
    }

    rabbitTemplate.execute(new ChannelCallback<Object>() {
        public Object doInRabbit(Channel channel) throws Exception {
            declareExchanges(channel, exchanges.toArray(new Exchange[exchanges.size()]));
            declareQueues(channel, queues.toArray(new Queue[queues.size()]));
            declareBindings(channel, bindings.toArray(new Binding[bindings.size()]));
            return null;
        }
    });
    logger.debug("Declarations finished");

}

---

From source file:org.springframework.amqp.rabbit.core.RabbitAdmin.java

private void declareQueues(final Channel channel, final Queue... queues) throws IOException {
    for (Queue queue : queues) {
        if (!queue.getName().startsWith("amq.")) {
            if (logger.isDebugEnabled()) {
                logger.debug("declaring Queue '" + queue.getName() + "'");
            }/*w  ww  . ja v  a 2s .  c om*/
            channel.queueDeclare(queue.getName(), queue.isDurable(), queue.isExclusive(), queue.isAutoDelete(),
                    queue.getArguments());
        } else if (logger.isDebugEnabled()) {
            logger.debug("Queue with name that starts with 'amq.' cannot be declared.");
        }
    }
}

---