/*
* Copyright 2008-2012 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.batch.item.database;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
import javax.sql.DataSource;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.batch.item.ExecutionContext;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemStream;
import org.springframework.batch.item.sample.Foo;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.transaction.annotation.Transactional;
/**
* Common scenarios for testing {@link ItemReader} implementations which read data from database.
*
* @author Lucas Ward
* @author Robert Kasanicky
*/
public abstract class AbstractJdbcItemReaderIntegrationTests {
protected ItemReader<Foo> itemReader;
protected ExecutionContext executionContext;
protected abstract ItemReader<Foo> createItemReader() throws Exception;
protected DataSource dataSource;
protected JdbcTemplate jdbcTemplate;
@Autowired
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(dataSource);
}
@Before
public void onSetUp()throws Exception{
itemReader = createItemReader();
getAsInitializingBean(itemReader).afterPropertiesSet();
executionContext = new ExecutionContext();
}
@After
public void onTearDown()throws Exception {
getAsDisposableBean(itemReader).destroy();
}
/*
* Regular scenario - read all rows and eventually return null.
*/
@Transactional @Test
public void testNormalProcessing() throws Exception {
getAsInitializingBean(itemReader).afterPropertiesSet();
getAsItemStream(itemReader).open(executionContext);
Foo foo1 = itemReader.read();
assertEquals(1, foo1.getValue());
Foo foo2 = itemReader.read();
assertEquals(2, foo2.getValue());
Foo foo3 = itemReader.read();
assertEquals(3, foo3.getValue());
Foo foo4 = itemReader.read();
assertEquals(4, foo4.getValue());
Foo foo5 = itemReader.read();
assertEquals(5, foo5.getValue());
assertNull(itemReader.read());
}
/*
* Restart scenario.
*/
@Transactional @Test
public void testRestart() throws Exception {
getAsItemStream(itemReader).open(executionContext);
Foo foo1 = itemReader.read();
assertEquals(1, foo1.getValue());
Foo foo2 = itemReader.read();
assertEquals(2, foo2.getValue());
getAsItemStream(itemReader).update(executionContext);
// create new input source
itemReader = createItemReader();
getAsItemStream(itemReader).open(executionContext);
Foo fooAfterRestart = itemReader.read();
assertEquals(3, fooAfterRestart.getValue());
}
/*
* Reading from an input source and then trying to restore causes an error.
*/
@Transactional @Test
public void testInvalidRestore() throws Exception {
getAsItemStream(itemReader).open(executionContext);
Foo foo1 = itemReader.read();
assertEquals(1, foo1.getValue());
Foo foo2 = itemReader.read();
assertEquals(2, foo2.getValue());
getAsItemStream(itemReader).update(executionContext);
// create new input source
itemReader = createItemReader();
getAsItemStream(itemReader).open(new ExecutionContext());
Foo foo = itemReader.read();
assertEquals(1, foo.getValue());
try {
getAsItemStream(itemReader).open(executionContext);
fail();
}
catch (IllegalStateException ex) {
// expected
}
}
/*
* Empty restart data should be handled gracefully.
*/
@Transactional @Test
public void testRestoreFromEmptyData() throws Exception {
ExecutionContext streamContext = new ExecutionContext();
getAsItemStream(itemReader).open(streamContext);
Foo foo = itemReader.read();
assertEquals(1, foo.getValue());
}
private ItemStream getAsItemStream(ItemReader<Foo> source) {
return (ItemStream) source;
}
private InitializingBean getAsInitializingBean(ItemReader<Foo> source) {
return (InitializingBean) source;
}
private DisposableBean getAsDisposableBean(ItemReader<Foo> source) {
return (DisposableBean) source;
}
}