[bs-72] Add Batch compiler by default

We could take this out again when we decide what to do about plugins
but it's good to have it in for now because it shows how to do it,
and exposes some holes.  The job.groovy script now works, but
a lot of it should be defaulted through auto-configuration.

(See also [bs-73] for a non-Batch related bug.)

[#48716881]

spring-bootstrap-cli/samples/job.groovy

@@ -0,0 +1,88 @@
+package org.test
+
+@GrabResolver(name='spring-milestone', root='http://repo.springframework.org/milestone')
+@Grab("org.hsqldb:hsqldb-j5:2.0.0")
+@Configuration
+@EnableBatchProcessing
+class JobConfig {
+
+	@Autowired
+	private JobBuilderFactory jobs
+
+	@Autowired
+	private StepBuilderFactory steps
+
+	@Bean
+	protected Tasklet tasklet() {
+		return new SampleTasklet()
+	}
+
+	@Bean
+	Job job() throws Exception {
+		return jobs.get("job").start(step1()).build()
+	}
+
+	@Bean
+	protected Step step1() throws Exception {
+		return steps.get("step1").tasklet(tasklet()).build()
+	}
+}
+
+class SampleTasklet implements Tasklet {
+	@Override
+	RepeatStatus execute(StepContribution contribution, ChunkContext context) {
+		return RepeatStatus.FINISHED
+	}
+}
+
+import org.springframework.util.StringUtils
+import groovy.util.logging.Log
+
+@Component
+@Log
+class JobRunner implements CommandLineRunner {
+
+	@Autowired(required=false)
+	private JobParametersConverter converter = new DefaultJobParametersConverter()
+
+	@Autowired
+	private JobLauncher jobLauncher
+
+	@Autowired
+	private Job job
+
+	void run(String... args) {
+		log.info("Running default command line with: ${args}")
+		launchJobFromProperties(StringUtils.splitArrayElementsIntoProperties(args, "="))
+	}
+
+	protected void launchJobFromProperties(Properties properties) {
+		jobLauncher.run(job, converter.getJobParameters(properties))
+	}
+}
+
+import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils
+import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator
+
+@Component
+class DatabaseInitializer {
+
+	@Autowired
+	private DataSource dataSource
+
+	@Autowired
+	private ResourceLoader resourceLoader
+
+	@PostConstruct
+	protected void initialize() {
+		String platform = org.springframework.batch.support.DatabaseType.fromMetaData(dataSource).toString().toLowerCase()
+		if (platform=="hsql") {
+			platform = "hsqldb"
+		}
+		ResourceDatabasePopulator populator = new ResourceDatabasePopulator()
+		populator.addScript(resourceLoader.getResource("org/springframework/batch/core/schema-${platform}.sql"))
+		populator.setContinueOnError(true)
+		DatabasePopulatorUtils.execute(populator, dataSource)
+	}
+}
+

spring-bootstrap-cli/src/main/java/org/springframework/bootstrap/cli/compiler/GroovyCompiler.java

@@ -31,6 +31,7 @@ import org.codehaus.groovy.control.CompilerConfiguration;
 import org.codehaus.groovy.control.SourceUnit;
 import org.codehaus.groovy.control.customizers.CompilationCustomizer;
 import org.codehaus.groovy.control.customizers.ImportCustomizer;
+import org.springframework.bootstrap.cli.compiler.autoconfigure.SpringBatchCompilerAutoConfiguration;
 import org.springframework.bootstrap.cli.compiler.autoconfigure.SpringBootstrapCompilerAutoConfiguration;
 import org.springframework.bootstrap.cli.compiler.autoconfigure.SpringMvcCompilerAutoConfiguration;
 
@@ -54,6 +55,7 @@ public class GroovyCompiler {
 	private static final CompilerAutoConfiguration[] COMPILER_AUTO_CONFIGURATIONS = {
 			new SpringBootstrapCompilerAutoConfiguration(),
 			new SpringMvcCompilerAutoConfiguration(),
+			new SpringBatchCompilerAutoConfiguration(),
 			new SpringBootstrapCompilerAutoConfiguration() };
 
 	private GroovyCompilerConfiguration configuration;

spring-bootstrap-cli/src/main/java/org/springframework/bootstrap/cli/compiler/autoconfigure/SpringBatchCompilerAutoConfiguration.java

@@ -38,7 +38,9 @@ public class SpringBatchCompilerAutoConfiguration extends CompilerAutoConfigurat
 	@Override
 	public void applyDependencies(DependencyCustomizer dependencies) {
 		dependencies.ifAnyMissingClasses("org.springframework.batch.core.Job").add(
-				"org.springframework.batch", "spring-batch-core", "2.1.9.RELEASE");
+				"org.springframework.batch", "spring-batch-core", "2.2.0.RC1");
+		dependencies.ifAnyMissingClasses("org.springframework.jdbc.core.JdbcTemplate")
+				.add("org.springframework", "spring-jdbc", "4.0.0.BOOTSTRAP-SNAPSHOT");
 	}
 
 	@Override
@@ -59,6 +61,7 @@ public class SpringBatchCompilerAutoConfiguration extends CompilerAutoConfigurat
 				"org.springframework.batch.core.JobParameter",
 				"org.springframework.batch.core.JobParameters",
 				"org.springframework.batch.core.launch.JobLauncher",
+				"org.springframework.batch.core.converter.JobParametersConverter",
 				"org.springframework.batch.core.converter.DefaultJobParametersConverter");
 	}
 }

spring-bootstrap-cli/src/main/java/org/springframework/bootstrap/cli/compiler/autoconfigure/SpringBootstrapCompilerAutoConfiguration.java

@@ -55,7 +55,8 @@ public class SpringBootstrapCompilerAutoConfiguration extends CompilerAutoConfig
 
 	@Override
 	public void applyImports(ImportCustomizer imports) {
-		imports.addImports("javax.sql.DataSource",
+		imports.addImports("javax.sql.DataSource", "javax.annotation.PostConstruct",
+				"javax.annotation.PreDestroy",
 				"org.springframework.stereotype.Controller",
 				"org.springframework.stereotype.Service",
 				"org.springframework.stereotype.Component",
@@ -67,6 +68,8 @@ public class SpringBootstrapCompilerAutoConfiguration extends CompilerAutoConfig
 				"org.springframework.context.annotation.Scope",
 				"org.springframework.context.annotation.Configuration",
 				"org.springframework.context.annotation.Bean",
+				"org.springframework.core.io.ResourceLoader",
+				"org.springframework.bootstrap.CommandLineRunner",
 				"org.springframework.bootstrap.context.annotation.EnableAutoConfiguration");
 		imports.addStarImports("org.springframework.stereotype");
 	}