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/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();
+	}
+
+}