org.springframework.jms.support.destination.JmsDestinationAccessor.java Source code

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Here is the source code for org.springframework.jms.support.destination.JmsDestinationAccessor.java

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/*
 * Copyright 2002-2016 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.jms.support.destination;

import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Session;

import org.springframework.jms.support.JmsAccessor;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

/**
 * Base class for {@link org.springframework.jms.core.JmsTemplate} and other
 * JMS-accessing gateway helpers, adding destination-related properties to
 * {@link JmsAccessor JmsAccessor's} common properties.
 *
 * <p>Not intended to be used directly.
 * See {@link org.springframework.jms.core.JmsTemplate}.
 *
 * @author Juergen Hoeller
 * @since 1.2.5
 * @see org.springframework.jms.support.JmsAccessor
 * @see org.springframework.jms.core.JmsTemplate
 */
public abstract class JmsDestinationAccessor extends JmsAccessor {

    /**
     * Timeout value indicating that a receive operation should
     * check if a message is immediately available without blocking.
     * @since 4.3
     */
    public static final long RECEIVE_TIMEOUT_NO_WAIT = -1;

    /**
     * Timeout value indicating a blocking receive without timeout.
     * @since 4.3
     */
    public static final long RECEIVE_TIMEOUT_INDEFINITE_WAIT = 0;

    private DestinationResolver destinationResolver = new DynamicDestinationResolver();

    private boolean pubSubDomain = false;

    /**
     * Set the {@link DestinationResolver} that is to be used to resolve
     * {@link javax.jms.Destination} references for this accessor.
     * <p>The default resolver is a DynamicDestinationResolver. Specify a
     * JndiDestinationResolver for resolving destination names as JNDI locations.
     * @see org.springframework.jms.support.destination.DynamicDestinationResolver
     * @see org.springframework.jms.support.destination.JndiDestinationResolver
     */
    public void setDestinationResolver(DestinationResolver destinationResolver) {
        Assert.notNull(destinationResolver, "'destinationResolver' must not be null");
        this.destinationResolver = destinationResolver;
    }

    /**
     * Return the DestinationResolver for this accessor (never {@code null}).
     */
    public DestinationResolver getDestinationResolver() {
        return this.destinationResolver;
    }

    /**
     * Configure the destination accessor with knowledge of the JMS domain used.
     * Default is Point-to-Point (Queues).
     * <p>This setting primarily indicates what type of destination to resolve
     * if dynamic destinations are enabled.
     * @param pubSubDomain "true" for the Publish/Subscribe domain ({@link javax.jms.Topic Topics}),
     * "false" for the Point-to-Point domain ({@link javax.jms.Queue Queues})
     * @see #setDestinationResolver
     */
    public void setPubSubDomain(boolean pubSubDomain) {
        this.pubSubDomain = pubSubDomain;
    }

    /**
     * Return whether the Publish/Subscribe domain ({@link javax.jms.Topic Topics}) is used.
     * Otherwise, the Point-to-Point domain ({@link javax.jms.Queue Queues}) is used.
     */
    public boolean isPubSubDomain() {
        return this.pubSubDomain;
    }

    /**
     * Resolve the given destination name into a JMS {@link Destination},
     * via this accessor's {@link DestinationResolver}.
     * @param session the current JMS {@link Session}
     * @param destinationName the name of the destination
     * @return the located {@link Destination}
     * @throws javax.jms.JMSException if resolution failed
     * @see #setDestinationResolver
     */
    protected Destination resolveDestinationName(Session session, String destinationName) throws JMSException {
        return getDestinationResolver().resolveDestinationName(session, destinationName, isPubSubDomain());
    }

    /**
     * Actually receive a message from the given consumer.
     * @param consumer the JMS MessageConsumer to receive with
     * @param timeout the receive timeout (a negative value indicates
     * a no-wait receive; 0 indicates an indefinite wait attempt)
     * @return the JMS Message received, or {@code null} if none
     * @throws JMSException if thrown by JMS API methods
     * @since 4.3
     * @see #RECEIVE_TIMEOUT_NO_WAIT
     * @see #RECEIVE_TIMEOUT_INDEFINITE_WAIT
     */
    @Nullable
    protected Message receiveFromConsumer(MessageConsumer consumer, long timeout) throws JMSException {
        if (timeout > 0) {
            return consumer.receive(timeout);
        } else if (timeout < 0) {
            return consumer.receiveNoWait();
        } else {
            return consumer.receive();
        }
    }

}