Add java configuration for the XML file import sample

Issue #3663

spring-batch-samples/src/main/java/org/springframework/batch/sample/file/xml/README.md

@@ -0,0 +1,52 @@
+### XML Input Output
+
+## About
+
+The goal here is to show the use of XML input and output through
+streaming and Spring OXM marshallers and unmarshallers.
+
+The job has a single step that copies `CustomerCredit` data from one XML
+file to another:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<customers>
+	<customer>
+		<name>customer1</name>
+		<credit>10</credit>
+	</customer>
+	<customer>
+		<name>customer2</name>
+		<credit>20</credit>
+	</customer>
+	<customer>
+		<name>customer3</name>
+		<credit>30</credit>
+	</customer>
+	<customer>
+		<name>customer4</name>
+		<credit>40</credit>
+	</customer>
+	<customer>
+		<name>customer5</name>
+		<credit>50</credit>
+	</customer>
+</customers>
+```
+
+
+It uses XStream for the object XML conversion,
+because this is simple to configure for basic use cases like this
+one.  See [Spring OXM documentation](https://docs.spring.io/spring-framework/reference/data-access/oxm.html) for details of other options.
+
+## Run the sample
+
+You can run the sample from the command line as following:
+
+```
+$>cd spring-batch-samples
+# Launch the sample using the XML configuration
+$>../mvnw -Dtest=XmlFunctionalTests#testLaunchJobWithXmlConfig test
+# Launch the sample using the Java configuration
+$>../mvnw -Dtest=XmlFunctionalTests#testLaunchJobWithJavaConfig test
+```

spring-batch-samples/src/main/java/org/springframework/batch/sample/file/xml/XmlJobConfiguration.java

@@ -0,0 +1,97 @@
+package org.springframework.batch.sample.file.xml;
+
+import java.math.BigDecimal;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import com.thoughtworks.xstream.security.ExplicitTypePermission;
+
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
+import org.springframework.batch.core.configuration.annotation.StepScope;
+import org.springframework.batch.core.job.builder.JobBuilder;
+import org.springframework.batch.core.repository.JobRepository;
+import org.springframework.batch.core.step.builder.StepBuilder;
+import org.springframework.batch.item.ItemReader;
+import org.springframework.batch.item.ItemWriter;
+import org.springframework.batch.item.xml.StaxEventItemReader;
+import org.springframework.batch.item.xml.StaxEventItemWriter;
+import org.springframework.batch.item.xml.builder.StaxEventItemReaderBuilder;
+import org.springframework.batch.item.xml.builder.StaxEventItemWriterBuilder;
+import org.springframework.batch.sample.domain.trade.CustomerCredit;
+import org.springframework.batch.sample.domain.trade.internal.CustomerCreditIncreaseProcessor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.WritableResource;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+import org.springframework.jdbc.support.JdbcTransactionManager;
+import org.springframework.oxm.xstream.XStreamMarshaller;
+
+@Configuration
+@EnableBatchProcessing
+public class XmlJobConfiguration {
+
+	@Bean
+	public XStreamMarshaller customerCreditMarshaller() {
+		XStreamMarshaller marshaller = new XStreamMarshaller();
+		marshaller
+			.setAliases(Map.of("customer", CustomerCredit.class, "credit", BigDecimal.class, "name", String.class));
+		marshaller.setTypePermissions(new ExplicitTypePermission(new Class[] { CustomerCredit.class }));
+		return marshaller;
+	}
+
+	@Bean
+	@StepScope
+	public StaxEventItemReader<CustomerCredit> itemReader(@Value("#{jobParameters[inputFile]}") Resource resource) {
+		return new StaxEventItemReaderBuilder<CustomerCredit>().name("itemReader")
+			.resource(resource)
+			.addFragmentRootElements("customer")
+			.unmarshaller(customerCreditMarshaller())
+			.build();
+	}
+
+	@Bean
+	@StepScope
+	public StaxEventItemWriter<CustomerCredit> itemWriter(
+			@Value("#{jobParameters[outputFile]}") WritableResource resource) {
+		return new StaxEventItemWriterBuilder<CustomerCredit>().name("itemWriter")
+			.resource(resource)
+			.marshaller(customerCreditMarshaller())
+			.rootTagName("customers")
+			.overwriteOutput(true)
+			.build();
+	}
+
+	@Bean
+	public Job job(JobRepository jobRepository, JdbcTransactionManager transactionManager,
+			ItemReader<CustomerCredit> itemReader, ItemWriter<CustomerCredit> itemWriter) {
+		return new JobBuilder("ioSampleJob", jobRepository)
+			.start(new StepBuilder("step1", jobRepository).<CustomerCredit, CustomerCredit>chunk(2, transactionManager)
+				.reader(itemReader)
+				.processor(new CustomerCreditIncreaseProcessor())
+				.writer(itemWriter)
+				.build())
+			.build();
+	}
+
+	// Infrastructure beans
+
+	@Bean
+	public DataSource dataSource() {
+		return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.HSQL)
+			.addScript("/org/springframework/batch/core/schema-drop-hsqldb.sql")
+			.addScript("/org/springframework/batch/core/schema-hsqldb.sql")
+			.generateUniqueName(true)
+			.build();
+	}
+
+	@Bean
+	public JdbcTransactionManager transactionManager(DataSource dataSource) {
+		return new JdbcTransactionManager(dataSource);
+	}
+
+}

spring-batch-samples/src/main/resources/org/springframework/batch/sample/file/xml/job/xml.xml

@@ -1,19 +1,32 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:batch="http://www.springframework.org/schema/batch"
 	xmlns:util="http://www.springframework.org/schema/util"
 	xsi:schemaLocation="
 		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/batch https://www.springframework.org/schema/batch/spring-batch.xsd
 		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">
 
-	<bean id="itemReader" class="org.springframework.batch.item.xml.StaxEventItemReader">
+	<batch:job id="ioSampleJob" xmlns="http://www.springframework.org/schema/batch">
+		<batch:step id="step1">
+			<batch:tasklet>
+				<batch:chunk reader="itemReader" processor="itemProcessor" writer="itemWriter"
+							 commit-interval="2"/>
+			</batch:tasklet>
+		</batch:step>
+	</batch:job>
+
+	<bean id="itemProcessor" class="org.springframework.batch.sample.domain.trade.internal.CustomerCreditIncreaseProcessor" />
+
+	<bean id="itemReader" class="org.springframework.batch.item.xml.StaxEventItemReader" scope="step">
 		<property name="fragmentRootElementName" value="customer" />
-		<property name="resource" value="data/iosample/input/input.xml" />
+		<property name="resource" value="#{jobParameters[inputFile]}" />
 		<property name="unmarshaller" ref="customerCreditMarshaller" />
 	</bean>
 
-	<bean id="itemWriter" class="org.springframework.batch.item.xml.StaxEventItemWriter">
-		<property name="resource" ref="outputResource" />
+	<bean id="itemWriter" class="org.springframework.batch.item.xml.StaxEventItemWriter" scope="step">
+		<property name="resource" value="#{jobParameters[outputFile]}" />
 		<property name="marshaller" ref="customerCreditMarshaller" />
 		<property name="rootTagName" value="customers" />
 		<property name="overwriteOutput" value="true" />
@@ -24,7 +37,7 @@
 			<util:map id="aliases">
 				<entry key="customer"
 					value="org.springframework.batch.sample.domain.trade.CustomerCredit" />
-				<entry key="price" value="java.math.BigDecimal" />
+				<entry key="credit" value="java.math.BigDecimal" />
 				<entry key="name" value="java.lang.String" />
 			</util:map>
 		</property>
@@ -39,7 +52,4 @@
 		</property>
 	</bean>
 
-	<bean id="outputResource" class="org.springframework.core.io.FileSystemResource">
-		<constructor-arg value="target/test-outputs/output.xml" />
-	</bean>
 </beans>

spring-batch-samples/src/test/java/org/springframework/batch/sample/file/xml/XmlFunctionalTests.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2006-2023 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
+ *
+ *      https://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.file.xml;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.batch.core.BatchStatus;
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.JobExecution;
+import org.springframework.batch.core.JobParameters;
+import org.springframework.batch.core.JobParametersBuilder;
+import org.springframework.batch.core.launch.JobLauncher;
+import org.springframework.batch.test.JobLauncherTestUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @author Dan Garrette
+ * @author Glenn Renfro
+ * @author Mahmoud Ben Hassine
+ * @since 2.0
+ */
+@SpringJUnitConfig(locations = { "/org/springframework/batch/sample/file/xml/job/xml.xml",
+		"/simple-job-launcher-context.xml", "/job-runner-context.xml" })
+class XmlFunctionalTests {
+
+	@Autowired
+	private JobLauncherTestUtils jobLauncherTestUtils;
+
+	@Test
+	void testLaunchJobWithXmlConfig() throws Exception {
+		// given
+		JobParameters jobParameters = new JobParametersBuilder()
+			.addString("inputFile", "org/springframework/batch/sample/file/xml/data/input.xml")
+			.addString("outputFile", "file:./target/test-outputs/output.xml")
+			.toJobParameters();
+
+		// when
+		JobExecution jobExecution = this.jobLauncherTestUtils.launchJob(jobParameters);
+
+		// then
+		assertEquals(BatchStatus.COMPLETED, jobExecution.getStatus());
+	}
+
+	@Test
+	public void testLaunchJobWithJavaConfig() throws Exception {
+		// given
+		ApplicationContext context = new AnnotationConfigApplicationContext(XmlJobConfiguration.class);
+		JobLauncher jobLauncher = context.getBean(JobLauncher.class);
+		Job job = context.getBean(Job.class);
+		JobParameters jobParameters = new JobParametersBuilder()
+			.addString("inputFile", "org/springframework/batch/sample/file/xml/data/input.xml")
+			.addString("outputFile", "file:./target/test-outputs/output.xml")
+			.toJobParameters();
+
+		// when
+		JobExecution jobExecution = jobLauncher.run(job, jobParameters);
+
+		// then
+		assertEquals(BatchStatus.COMPLETED, jobExecution.getStatus());
+	}
+
+}

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

@@ -1,44 +0,0 @@
-/*
- * Copyright 2006-2022 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
- *
- *      https://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.iosample;
-
-import org.springframework.batch.item.ItemReader;
-import org.springframework.batch.item.xml.StaxEventItemReader;
-import org.springframework.batch.sample.domain.trade.CustomerCredit;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.core.io.Resource;
-import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
-
-/**
- * @author Dan Garrette
- * @author Glenn Renfro
- * @author Mahmoud Ben Hassine
- * @since 2.0
- */
-@SpringJUnitConfig(locations = "/jobs/iosample/xml.xml")
-class XmlFunctionalTests extends AbstractIoSampleTests {
-
-	@Autowired
-	private Resource outputResource;
-
-	@Override
-	protected void pointReaderToOutput(ItemReader<CustomerCredit> reader) {
-		StaxEventItemReader<?> xmlReader = (StaxEventItemReader<?>) reader;
-		xmlReader.setResource(outputResource);
-	}
-
-}