Revert @ConditionalOnProperty

timestamp-batch-3.0.x/pom.xml

@@ -49,6 +49,10 @@
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

timestamp-batch-3.0.x/src/main/java/io/spring/configuration/TimestampBatchTaskConfiguration.java

@@ -56,7 +56,7 @@ public class TimestampBatchTaskConfiguration extends DefaultBatchConfiguration {
 	private TimestampBatchTaskProperties config;
 
 	@Bean
-	@ConditionalOnMissingBean
+	@ConditionalOnProperty(name = "spring.datasource.driver-class-name", matchIfMissing = true, havingValue="matchonlyifmissing")
 	public DataSource dataSource() {
 		return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2)
 				.addScript("/org/springframework/batch/core/schema-h2.sql")