/*
 * Copyright 2006-2007 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.sample;

import org.springframework.batch.core.UnexpectedJobExecutionException;
import org.springframework.batch.core.JobParameters;
import org.springframework.jdbc.core.JdbcOperations;

/**
 * Simple restart scenario.
 * 
 * @author Robert Kasanicky
 * @author Dave Syer
 */
public class RestartFunctionalTests extends AbstractBatchLauncherTests {

	//auto-injected attributes
	private JdbcOperations jdbcTemplate;

	/**
	 * Public setter for the jdbcTemplate.
	 *
	 * @param jdbcTemplate the jdbcTemplate to set
	 */
	public void setJdbcTemplate(JdbcOperations jdbcTemplate) {
		this.jdbcTemplate = jdbcTemplate;
	}
	
	/* (non-Javadoc)
	 * @see org.springframework.test.AbstractSingleSpringContextTests#onTearDown()
	 */
	protected void onTearDown() throws Exception {
		jdbcTemplate.update("DELETE FROM TRADE");
	}
	
	/**
	 * Job fails on first run, because the module throws exception after
	 * processing more than half of the input. On the second run, the job should
	 * finish successfully, because it continues execution where the previous
	 * run stopped (module throws exception after fixed number of processed
	 * records).
	 * @throws Exception 
	 */
	public void testRestart() throws Exception {
		
		int before = jdbcTemplate.queryForInt("SELECT COUNT(*) FROM TRADE");

		try {
			runJob();
			fail("First run of the job is expected to fail.");
		}
		catch (UnexpectedJobExecutionException expected) {
			//expected
			assertTrue("Not planned exception: "+expected.getMessage(), expected.getMessage().toLowerCase().indexOf("planned")>=0);
		}

		int medium = jdbcTemplate.queryForInt("SELECT COUNT(*) FROM TRADE");
		// assert based on commit interval = 2
		assertEquals(before+2, medium);

		runJob();

		int after = jdbcTemplate.queryForInt("SELECT COUNT(*) FROM TRADE");

		assertEquals(before+5, after);
	}

	// load the application context and launch the job
	private void runJob() throws Exception {
		launcher.run(getJob(), new JobParameters());
	}

}
