BATCH-1918: First effort at @EnableBatchProcessing

Example:

    @Configuration
    @EnableBatchProcessing
    public class RetrySampleConfiguration {

      @Autowired
      private JobBuilderFactory jobs;

      @Autowired
      private StepBuilderFactory steps;

      @Bean
      public Job retrySample() throws Exception {
        return jobs.get("retrySample").start(step()).build();
      }

      @Bean
      protected Step step() throws Exception {
        return steps.get("step").<Trade, Object> chunk(1).reader(reader()).writer(writer()).faultTolerant()
          .retry(Exception.class).retryLimit(3).build();
      }

      @Bean
      protected ItemReader<Trade> reader() {
        GeneratingTradeItemReader reader = new GeneratingTradeItemReader();
        reader.setLimit(10);
        return reader;
      }

      @Bean
      protected ItemWriter<Object> writer() {
        return new RetrySampleItemWriter<Object>();
      }

    }

spring-batch-samples/src/main/java/org/springframework/batch/sample/config/DataSourceConfiguration.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2012-2013 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.config;
+
+import javax.annotation.PostConstruct;
+import javax.sql.DataSource;
+
+import org.apache.commons.dbcp.BasicDataSource;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
+import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
+
+/**
+ * @author Dave Syer
+ *
+ */
+@Configuration
+@PropertySource("classpath:/batch-hsql.properties")
+public class DataSourceConfiguration {
+	
+	@Autowired
+	private Environment environment;
+	
+	@Autowired
+	private ResourceLoader resourceLoader;
+	
+	@PostConstruct
+	protected void initialize() {
+		ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
+		populator.addScript(resourceLoader.getResource(environment.getProperty("batch.schema.script")));
+		populator.setContinueOnError(true);
+		DatabasePopulatorUtils.execute(populator , dataSource());
+	}
+	
+	@Bean(destroyMethod="close")
+	public DataSource dataSource() {
+		BasicDataSource dataSource = new BasicDataSource();
+		dataSource.setDriverClassName(environment.getProperty("batch.jdbc.driver"));
+		dataSource.setUrl(environment.getProperty("batch.jdbc.url"));
+		dataSource.setUsername(environment.getProperty("batch.jdbc.user"));
+		dataSource.setPassword(environment.getProperty("batch.jdbc.password"));
+		return dataSource;
+	}
+
+}

spring-batch-samples/src/main/java/org/springframework/batch/sample/config/RetrySampleConfiguration.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-2013 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.config;
+
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.Step;
+import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
+import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
+import org.springframework.batch.item.ItemReader;
+import org.springframework.batch.item.ItemWriter;
+import org.springframework.batch.sample.domain.trade.Trade;
+import org.springframework.batch.sample.domain.trade.internal.GeneratingTradeItemReader;
+import org.springframework.batch.sample.support.RetrySampleItemWriter;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author Dave Syer
+ * 
+ */
+@Configuration
+public class RetrySampleConfiguration {
+
+	@Autowired
+	private JobBuilderFactory jobs;
+
+	@Autowired
+	private StepBuilderFactory steps;
+
+	@Bean
+	public Job retrySample() throws Exception {
+		return jobs.get("retrySample").start(step()).build();
+	}
+
+	@Bean
+	protected Step step() throws Exception {
+		return steps.get("step").<Trade, Object> chunk(1).reader(reader()).writer(writer()).faultTolerant()
+				.retry(Exception.class).retryLimit(3).build();
+	}
+
+	@Bean
+	protected ItemReader<Trade> reader() {
+		GeneratingTradeItemReader reader = new GeneratingTradeItemReader();
+		reader.setLimit(10);
+		return reader;
+	}
+
+	@Bean
+	protected ItemWriter<Object> writer() {
+		return new RetrySampleItemWriter<Object>();
+	}
+
+}

spring-batch-samples/src/main/resources/jobs/tradeJob.xml

@@ -2,8 +2,11 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:p="http://www.springframework.org/schema/p"
+	xmlns:batch="http://www.springframework.org/schema/batch"
 	xsi:schemaLocation="http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch-2.1.xsd
 		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
+		
+	<batch:job-repository />
 
 	<job id="tradeJob" xmlns="http://www.springframework.org/schema/batch">
 		<step id="step1" next="step2">

spring-batch-samples/src/test/java/org/springframework/batch/sample/RetrySampleConfigurationTests.java

@@ -0,0 +1,43 @@
+package org.springframework.batch.sample;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.batch.sample.config.DataSourceConfiguration;
+import org.springframework.batch.sample.config.JobRunnerConfiguration;
+import org.springframework.batch.sample.config.RetrySampleConfiguration;
+import org.springframework.batch.sample.domain.trade.internal.GeneratingTradeItemReader;
+import org.springframework.batch.sample.support.RetrySampleItemWriter;
+import org.springframework.batch.test.JobLauncherTestUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * Checks that expected number of items have been processed.
+ * 
+ * @author Robert Kasanicky
+ * @author Dave Syer
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { DataSourceConfiguration.class, RetrySampleConfiguration.class, JobRunnerConfiguration.class})
+public class RetrySampleConfigurationTests {
+
+	@Autowired
+	private GeneratingTradeItemReader itemGenerator;
+	
+	@Autowired
+	private RetrySampleItemWriter<?> itemProcessor;
+	
+	@Autowired
+	private JobLauncherTestUtils jobLauncherTestUtils;
+
+	@Test
+	public void testLaunchJob() throws Exception {
+		jobLauncherTestUtils.launchJob();
+		//items processed = items read + 2 exceptions
+		assertEquals(itemGenerator.getLimit()+2, itemProcessor.getCounter());
+	}
+	
+}

spring-batch-samples/src/test/java/org/springframework/batch/sample/config/JobRunnerConfiguration.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2012-2013 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.config;
+
+import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
+import org.springframework.batch.test.JobLauncherTestUtils;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author Dave Syer
+ * 
+ */
+@Configuration
+@EnableBatchProcessing
+public class JobRunnerConfiguration {
+
+	@Bean
+	public JobLauncherTestUtils utils() throws Exception {
+		return new JobLauncherTestUtils();
+	}
+
+}