components/camel-jgroups/src/test/java/org/apache/camel/component/jgroups/JGroupsComponentTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.jgroups;

import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.jgroups.JChannel;
import org.jgroups.Message;
import org.junit.Test;

public class JGroupsComponentTest extends CamelTestSupport {

    // Constants

    static final String CLUSTER_NAME = "CLUSTER_NAME";

    static final String MESSAGE = "MESSAGE";

    static final String SAMPLE_CHANNEL_PROPERTY = "discard_incompatible_packets=true";

    static final String SAMPLE_CHANNEL_PROPERTIES = String.format("UDP(%s)", SAMPLE_CHANNEL_PROPERTY);

    static final String CONFIGURED_ENDPOINT_URI = String.format("jgroups:%s?channelProperties=%s", CLUSTER_NAME, SAMPLE_CHANNEL_PROPERTIES);

    // Fixtures

    JChannel clientChannel;

    JChannel defaultComponentChannel;

    // Routes fixture

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        JGroupsComponent defaultComponent = new JGroupsComponent();
        defaultComponent.setChannel(defaultComponentChannel);
        context().addComponent("my-default-jgroups", defaultComponent);

        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("my-default-jgroups:" + CLUSTER_NAME).to("mock:default");
                from(CONFIGURED_ENDPOINT_URI).to("mock:configured");
            }
        };
    }

    // Fixture setup

    @Override
    protected void doPreSetup() throws Exception {
        super.doPreSetup();
        clientChannel = new JChannel();
        clientChannel.connect(CLUSTER_NAME);

        defaultComponentChannel = new JChannel();
    }

    @Override
    public void tearDown() throws Exception {
        clientChannel.close();
        super.tearDown();
    }

    @Test
    public void shouldConsumeMulticastedMessage() throws Exception {
        // Given
        MockEndpoint mockEndpoint = getMockEndpoint("mock:default");
        mockEndpoint.setExpectedMessageCount(1);
        mockEndpoint.expectedBodiesReceived(MESSAGE);

        // When
        clientChannel.send(new Message(null, null, MESSAGE));

        // Then
        mockEndpoint.assertIsSatisfied();
    }

    @Test
    public void shouldConfigureChannelWithProperties() throws Exception {
        // When
        JGroupsEndpoint endpoint = getMandatoryEndpoint(CONFIGURED_ENDPOINT_URI, JGroupsEndpoint.class);

        // Then
        assertTrue(endpoint.getResolvedChannel().getProperties().contains(SAMPLE_CHANNEL_PROPERTY));
    }

    @Test
    public void shouldCreateChannel() throws Exception {
        // When
        JGroupsEndpoint endpoint = getMandatoryEndpoint("my-default-jgroups:" + CLUSTER_NAME, JGroupsEndpoint.class);
        JGroupsComponent component = (JGroupsComponent)endpoint.getComponent();

        // Then
        assertNotNull(component.getChannel());
    }

}