FailOverRouterTest.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.openejb.resource.jdbc;

import org.apache.openejb.junit.ApplicationComposer;
import org.apache.openejb.resource.jdbc.router.FailOverRouter;
import org.apache.openejb.testing.Configuration;
import org.apache.openejb.testing.Module;
import org.apache.openejb.testng.PropertiesBuilder;
import org.apache.xbean.finder.AnnotationFinder;
import org.apache.xbean.finder.IAnnotationFinder;
import org.apache.xbean.finder.archive.ClassesArchive;
import org.junit.Test;
import org.junit.runner.RunWith;

import javax.annotation.Resource;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Properties;

import static org.apache.openejb.resource.jdbc.FailOverRouters.datasource;
import static org.apache.openejb.resource.jdbc.FailOverRouters.url;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

@RunWith(ApplicationComposer.class)
public class FailOverRouterTest {
    @Resource(name = "routedDs")
    private DataSource failover;

    @Resource(name = "router")
    private FailOverRouter router;

    @Test
    public void test() throws SQLException {
        assertNotNull(failover);

        int total = 0;
        int i = 1;
        for (int it = 0; it < 6; it++) {
            for (int a = 0; a < 10; a++) {
                total++;
                assertEquals("jdbc:hsqldb:mem:fo" + i, url(failover.getConnection()));
            }

            rotate();
            i = 1 + (i % 3);
        }

        assertEquals(60, total);
    }

    private void rotate() {
        final Iterator<FailOverRouter.DataSourceHolder> it = router.getDataSources().iterator();
        final FailOverRouter.DataSourceHolder ds1 = it.next();
        router.updateDataSources(Arrays.asList(it.next(), it.next(), ds1));
    }

    @Configuration
    public Properties configuration() {
        // datasources
        return datasource(datasource(datasource(new PropertiesBuilder(), "fo1"), "fo2"), "fo3")

            // router
            .property("router", "new://Resource?class-name=" + FailOverRouter.class.getName())
            .property("router.datasourceNames", "fo1,fo2,fo3")

                // routed DS
            .property("routedDs", "new://Resource?provider=RoutedDataSource&type=DataSource")
            .property("routedDs.router", "router")

            .build();
    }

    @Module
    public IAnnotationFinder finder() { // needed to run the test
        return new AnnotationFinder(new ClassesArchive());
    }
}