jndidestinationresolvertests.java

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/*
 * Copyright 2002-2006 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
 *
 *      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.springframework.jms.support.destination;

import junit.framework.TestCase;
import org.easymock.MockControl;
import org.springframework.test.AssertThrows;

import javax.jms.Destination;
import javax.jms.Session;
import javax.naming.NamingException;

/**
 * Unit tests for the {@link JndiDestinationResolver} class.
 *
 * @author Rick Evans
 */
public final class JndiDestinationResolverTests extends TestCase {

    private static final String DESTINATION_NAME = "foo";

    private static final Destination DESTINATION = new StubTopic();


    public void testHitsCacheSecondTimeThrough() throws Exception {

        MockControl mockSession = MockControl.createControl(Session.class);
        Session session = (Session) mockSession.getMock();
        mockSession.replay();

        JndiDestinationResolver resolver = new OneTimeLookupJndiDestinationResolver();
        Destination destination = resolver.resolveDestinationName(session, DESTINATION_NAME, true);
        assertNotNull(destination);
        assertSame(DESTINATION, destination);

        mockSession.verify();
    }

    public void testDoesNotUseCacheIfCachingIsTurnedOff() throws Exception {

        MockControl mockSession = MockControl.createControl(Session.class);
        Session session = (Session) mockSession.getMock();
        mockSession.replay();

        CountingCannedJndiDestinationResolver resolver
                = new CountingCannedJndiDestinationResolver();
        resolver.setCache(false);
        Destination destination = resolver.resolveDestinationName(session, DESTINATION_NAME, true);
        assertNotNull(destination);
        assertSame(DESTINATION, destination);
        assertEquals(1, resolver.getCallCount());
        
        destination = resolver.resolveDestinationName(session, DESTINATION_NAME, true);
        assertNotNull(destination);
        assertSame(DESTINATION, destination);
        assertEquals(2, resolver.getCallCount());

        mockSession.verify();
    }

    public void testDelegatesToFallbackIfNotResolvedInJndi() throws Exception {
        MockControl mockSession = MockControl.createControl(Session.class);
        Session session = (Session) mockSession.getMock();
        mockSession.replay();

        MockControl mockDestinationResolver = MockControl.createControl(DestinationResolver.class);
        DestinationResolver dynamicResolver = (DestinationResolver) mockDestinationResolver.getMock();
        dynamicResolver.resolveDestinationName(session, DESTINATION_NAME, true);
        mockDestinationResolver.setReturnValue(DESTINATION);
        mockDestinationResolver.replay();

        JndiDestinationResolver resolver = new JndiDestinationResolver() {
            protected Object lookup(String jndiName, Class requiredClass) throws NamingException {
                throw new NamingException();
            }
        };
        resolver.setFallbackToDynamicDestination(true);
        resolver.setDynamicDestinationResolver(dynamicResolver);
        Destination destination = resolver.resolveDestinationName(session, DESTINATION_NAME, true);

        assertNotNull(destination);
        assertSame(DESTINATION, destination);

        mockSession.verify();
        mockDestinationResolver.verify();
    }

    public void testDoesNotDelegateToFallbackIfNotResolvedInJndi() throws Exception {
        MockControl mockSession = MockControl.createControl(Session.class);
        final Session session = (Session) mockSession.getMock();
        mockSession.replay();

        MockControl mockDestinationResolver = MockControl.createControl(DestinationResolver.class);
        DestinationResolver dynamicResolver = (DestinationResolver) mockDestinationResolver.getMock();
        mockDestinationResolver.replay();

        final JndiDestinationResolver resolver = new JndiDestinationResolver() {
            protected Object lookup(String jndiName, Class requiredClass) throws NamingException {
                throw new NamingException();
            }
        };
        resolver.setDynamicDestinationResolver(dynamicResolver);

        new AssertThrows(DestinationResolutionException.class) {
            public void test() throws Exception {
                resolver.resolveDestinationName(session, DESTINATION_NAME, true);
            }
        }.runTest();

        mockSession.verify();
        mockDestinationResolver.verify();
    }


    private static class OneTimeLookupJndiDestinationResolver extends JndiDestinationResolver {

        private boolean called;

        protected Object lookup(String jndiName, Class requiredType) throws NamingException {
            if (called) {
                fail("Must not be delegating to lookup(..), must be resolving from cache.");
            }
            assertEquals(DESTINATION_NAME, jndiName);
            called = true;
            return DESTINATION;
        }
    }

    private static class CountingCannedJndiDestinationResolver extends JndiDestinationResolver {
        private int callCount;

        public int getCallCount() {
            return this.callCount;
        }

        protected Object lookup(String jndiName, Class requiredType) throws NamingException {
            ++this.callCount;
            return DESTINATION;
        }
    }
}