Add java configuration for the multi-resource job sample

Issue #3663

spring-batch-samples/src/main/java/org/springframework/batch/sample/file/multiresource/MultiResourceJobConfiguration.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright 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.multiresource;
+
+import javax.sql.DataSource;
+
+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.file.FlatFileItemReader;
+import org.springframework.batch.item.file.FlatFileItemWriter;
+import org.springframework.batch.item.file.MultiResourceItemReader;
+import org.springframework.batch.item.file.MultiResourceItemWriter;
+import org.springframework.batch.item.file.builder.FlatFileItemReaderBuilder;
+import org.springframework.batch.item.file.builder.FlatFileItemWriterBuilder;
+import org.springframework.batch.item.file.builder.MultiResourceItemReaderBuilder;
+import org.springframework.batch.item.file.builder.MultiResourceItemWriterBuilder;
+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;
+
+/**
+ * @author Mahmoud Ben Hassine
+ */
+@Configuration
+@EnableBatchProcessing
+public class MultiResourceJobConfiguration {
+
+	@Bean
+	@StepScope
+	public MultiResourceItemReader<CustomerCredit> itemReader(
+			@Value("#{jobParameters[inputFiles]}") Resource[] resources) {
+		return new MultiResourceItemReaderBuilder<CustomerCredit>().name("itemReader")
+			.resources(resources)
+			.delegate(delegateReader())
+			.build();
+	}
+
+	@Bean
+	public FlatFileItemReader<CustomerCredit> delegateReader() {
+		return new FlatFileItemReaderBuilder<CustomerCredit>().name("delegateItemReader")
+			.delimited()
+			.names("name", "credit")
+			.targetType(CustomerCredit.class)
+			.build();
+	}
+
+	@Bean
+	@StepScope
+	public MultiResourceItemWriter<CustomerCredit> itemWriter(
+			@Value("#{jobParameters[outputFiles]}") WritableResource resource) {
+		return new MultiResourceItemWriterBuilder<CustomerCredit>().name("itemWriter")
+			.delegate(delegateWriter())
+			.resource(resource)
+			.itemCountLimitPerResource(6)
+			.build();
+	}
+
+	@Bean
+	public FlatFileItemWriter<CustomerCredit> delegateWriter() {
+		return new FlatFileItemWriterBuilder<CustomerCredit>().name("delegateItemWriter")
+			.delimited()
+			.names("name", "credit")
+			.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/java/org/springframework/batch/sample/file/multiresource/README.md

@@ -0,0 +1,19 @@
+### MultiResource Input Output Job
+
+## About
+
+This sample shows how to use the `MultiResourceItemReader` and `MultiResourceItemWriter`
+to read and write multiple files in the same step.
+
+## 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=MultiResourceFunctionalTests#testLaunchJobWithXmlConfig test
+# Launch the sample using the Java configuration
+$>../mvnw -Dtest=MultiResourceFunctionalTests#testLaunchJobWithJavaConfig test
+```
+

spring-batch-samples/src/main/resources/org/springframework/batch/sample/file/multiresource/data/delimited.csv

@@ -0,0 +1,6 @@
+customer1,10
+customer2,20
+customer3,30
+customer4,40
+customer5,50
+customer6,60

spring-batch-samples/src/main/resources/org/springframework/batch/sample/file/multiresource/data/delimited2.csv

@@ -0,0 +1,2 @@
+customer7,70
+customer8,80

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

@@ -1,9 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:batch="http://www.springframework.org/schema/batch"
+	   xsi:schemaLocation="
+		http://www.springframework.org/schema/batch https://www.springframework.org/schema/batch/spring-batch.xsd
 		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
 
+	<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.file.MultiResourceItemReader" scope="step">
 		<property name="delegate">
@@ -29,13 +42,13 @@
 				</property>
 			</bean>
 		</property>
-		<property name="resources" value="#{jobParameters['input.file.path']}" />
+		<property name="resources" value="#{jobParameters['inputFiles']}" />
 	</bean>
 
 	<bean id="itemWriter"
 		class="org.springframework.batch.item.file.MultiResourceItemWriter" scope="step">
 		<property name="resource"
-			value="#{jobParameters['output.file.path']}" />
+			value="#{jobParameters['outputFiles']}" />
 		<property name="itemCountLimitPerResource" value="6" />
 		<property name="delegate" ref="delegateWriter" />
 	</bean>