Add Groovy template engine support for Spring MVC apps

Default suffix .tpl. If groovy-templates is on the classpath user
can now add templates and get them rendered and resolved in an MVC
app.

TODO: Macro helpers for message rendering etc.

See gh-878

spring-boot-autoconfigure/pom.xml

@@ -66,6 +66,11 @@
 			<artifactId>tomcat-jdbc</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.codehaus.groovy</groupId>
+			<artifactId>groovy-templates</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>com.zaxxer</groupId>
 			<artifactId>HikariCP</artifactId>

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/GroovyTemplateAutoConfiguration.java

+/*
+ * 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.boot.autoconfigure.groovy.template;
+
+import groovy.text.TemplateEngine;
+import groovy.text.markup.BaseTemplate;
+import groovy.text.markup.MarkupTemplateEngine;
+import groovy.text.markup.TemplateConfiguration;
+
+import java.net.URL;
+import java.net.URLClassLoader;
+
+import javax.annotation.PostConstruct;
+import javax.servlet.Servlet;
+
+import org.springframework.beans.factory.BeanClassLoaderAware;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.groovy.template.web.GroovyTemplateViewResolver;
+import org.springframework.boot.autoconfigure.groovy.template.web.LocaleAwareTemplate;
+import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.core.Ordered;
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.util.Assert;
+
+/**
+ * Autoconfiguration support for Groovy templates in MVC. By default creates a
+ * {@link MarkupTemplateEngine} configured from {@link GroovyTemplateProperties}, but you
+ * can override that by providing a {@link TemplateEngine} of a different type.
+ * 
+ * @author Dave Syer
+ * @since 1.1.0
+ */
+@Configuration
+@ConditionalOnClass(TemplateEngine.class)
+@AutoConfigureAfter(WebMvcAutoConfiguration.class)
+@EnableConfigurationProperties(GroovyTemplateProperties.class)
+public class GroovyTemplateAutoConfiguration {
+
+	@Autowired
+	private final ResourceLoader resourceLoader = new DefaultResourceLoader();
+
+	@Autowired
+	private GroovyTemplateProperties properties;
+
+	@PostConstruct
+	public void checkTemplateLocationExists() {
+		if (this.properties.isCheckTemplateLocation()) {
+			Resource resource = this.resourceLoader.getResource(this.properties
+					.getPrefix());
+			Assert.state(resource.exists(), "Cannot find template location: " + resource
+					+ " (please add some templates "
+					+ "or check your FreeMarker configuration)");
+		}
+	}
+
+	@Configuration
+	@ConditionalOnClass({ Servlet.class, LocaleContextHolder.class })
+	@ConditionalOnWebApplication
+	public static class GroovyWebConfiguration implements BeanClassLoaderAware {
+
+		@Autowired
+		private final ResourceLoader resourceLoader = new DefaultResourceLoader();
+
+		@Autowired
+		private GroovyTemplateProperties properties;
+
+		private ClassLoader classLoader = GroovyWebConfiguration.class.getClassLoader();
+
+		@Override
+		public void setBeanClassLoader(ClassLoader classLoader) {
+			this.classLoader = classLoader;
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(TemplateEngine.class)
+		public TemplateEngine groovyTemplateEngine() throws Exception {
+			TemplateConfiguration configuration = this.properties.getConfiguration();
+			if (configuration.getBaseTemplateClass() == BaseTemplate.class) {
+				// Enable locale-dependent includes
+				configuration.setBaseTemplateClass(LocaleAwareTemplate.class);
+			}
+			return new MarkupTemplateEngine(createParentLoaderForTemplates(),
+					configuration);
+		}
+
+		private ClassLoader createParentLoaderForTemplates() throws Exception {
+			return new URLClassLoader(new URL[] { this.resourceLoader.getResource(
+					this.properties.getPrefix()).getURL() }, this.classLoader);
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(name = "groovyTemplateViewResolver")
+		public GroovyTemplateViewResolver groovyTemplateViewResolver(TemplateEngine engine) {
+			GroovyTemplateViewResolver resolver = new GroovyTemplateViewResolver();
+			resolver.setPrefix(this.properties.getPrefix());
+			resolver.setSuffix(this.properties.getSuffix());
+			resolver.setCache(this.properties.isCache());
+			resolver.setContentType(this.properties.getContentType());
+			resolver.setCharSet(this.properties.getCharSet());
+			resolver.setViewNames(this.properties.getViewNames());
+			resolver.setTemplateEngine(engine);
+
+			// This resolver acts as a fallback resolver (e.g. like a
+			// InternalResourceViewResolver) so it needs to have low precedence
+			resolver.setOrder(Ordered.LOWEST_PRECEDENCE - 6);
+
+			return resolver;
+		}
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/GroovyTemplateAvailabilityProvider.java

+/*
+ * Copyright 2012-2014 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.boot.autoconfigure.groovy.template;
+
+import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider;
+import org.springframework.core.env.Environment;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.util.ClassUtils;
+
+/**
+ * {@link TemplateAvailabilityProvider} that provides availability information for Groovy
+ * view templates
+ * 
+ * @author Dave Syer
+ * @since 1.1.0
+ */
+public class GroovyTemplateAvailabilityProvider implements TemplateAvailabilityProvider {
+
+	@Override
+	public boolean isTemplateAvailable(String view, Environment environment,
+			ClassLoader classLoader, ResourceLoader resourceLoader) {
+		if (ClassUtils.isPresent("groovy.text.TemplateEngine", classLoader)) {
+			String prefix = environment.getProperty("spring.groovy.template.prefix",
+					GroovyTemplateProperties.DEFAULT_PREFIX);
+			String suffix = environment.getProperty("spring.groovy.template.suffix",
+					GroovyTemplateProperties.DEFAULT_SUFFIX);
+			return resourceLoader.getResource(prefix + view + suffix).exists();
+		}
+		return false;
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/GroovyTemplateProperties.java

+/*
+ * 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.boot.autoconfigure.groovy.template;
+
+import groovy.text.markup.TemplateConfiguration;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * @author Dave Syer
+ * @since 1.1.0
+ */
+@ConfigurationProperties(prefix = "spring.groovy.template")
+public class GroovyTemplateProperties {
+
+	public static final String DEFAULT_PREFIX = "classpath:/templates/";
+
+	public static final String DEFAULT_SUFFIX = ".tpl";
+
+	private String prefix = DEFAULT_PREFIX;
+
+	private String suffix = DEFAULT_SUFFIX;
+
+	private boolean cache;
+
+	private String contentType = "text/html";
+
+	private String charSet = "UTF-8";
+
+	private String[] viewNames;
+
+	private boolean checkTemplateLocation = true;
+
+	private TemplateConfiguration configuration = new TemplateConfiguration();
+
+	public void setCheckTemplateLocation(boolean checkTemplateLocation) {
+		this.checkTemplateLocation = checkTemplateLocation;
+	}
+
+	public boolean isCheckTemplateLocation() {
+		return this.checkTemplateLocation;
+	}
+
+	public String[] getViewNames() {
+		return this.viewNames;
+	}
+
+	public void setViewNames(String[] viewNames) {
+		this.viewNames = viewNames;
+	}
+
+	public boolean isCache() {
+		return this.cache;
+	}
+
+	public void setCache(boolean cache) {
+		this.cache = cache;
+	}
+
+	public String getContentType() {
+		return this.contentType
+				+ (this.contentType.contains(";charset=") ? "" : ";charset="
+						+ this.charSet);
+	}
+
+	public void setContentType(String contentType) {
+		this.contentType = contentType;
+	}
+
+	public String getCharSet() {
+		return this.charSet;
+	}
+
+	public void setCharSet(String charSet) {
+		this.charSet = charSet;
+	}
+
+	public String getPrefix() {
+		return this.prefix;
+	}
+
+	public void setPrefix(String prefix) {
+		this.prefix = prefix;
+	}
+
+	public String getSuffix() {
+		return this.suffix;
+	}
+
+	public void setSuffix(String suffix) {
+		this.suffix = suffix;
+	}
+
+	public void setConfiguration(TemplateConfiguration configuration) {
+		this.configuration = configuration;
+	}
+
+	public TemplateConfiguration getConfiguration() {
+		return this.configuration;
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/web/GroovyTemplateView.java

+/*
+ * 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.boot.autoconfigure.groovy.template.web;
+
+import groovy.text.Template;
+
+import java.io.BufferedWriter;
+import java.util.Map;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.web.servlet.view.AbstractUrlBasedView;
+
+/**
+ * @author Dave Syer
+ * 
+ * @since 1.1.0
+ */
+public class GroovyTemplateView extends AbstractUrlBasedView {
+
+	private final Template template;
+
+	public GroovyTemplateView(Template template) {
+		this.template = template;
+	}
+
+	@Override
+	protected void renderMergedOutputModel(Map<String, Object> model,
+			HttpServletRequest request, HttpServletResponse response) throws Exception {
+		applyContentType(response);
+		this.template.make(model).writeTo(new BufferedWriter(response.getWriter()));
+	}
+
+	/**
+	 * Apply this view's content type as specified in the "contentType" bean property to
+	 * the given response.
+	 * @param response current HTTP response
+	 * @see #setContentType
+	 */
+	protected void applyContentType(HttpServletResponse response) {
+		if (response.getContentType() == null) {
+			response.setContentType(getContentType());
+		}
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/web/GroovyTemplateViewResolver.java

+/*
+ * 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.boot.autoconfigure.groovy.template.web;
+
+import groovy.text.SimpleTemplateEngine;
+import groovy.text.Template;
+import groovy.text.TemplateEngine;
+
+import java.io.InputStreamReader;
+import java.util.Locale;
+
+import org.springframework.beans.propertyeditors.LocaleEditor;
+import org.springframework.core.io.Resource;
+import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.view.UrlBasedViewResolver;
+
+/**
+ * @author Dave Syer
+ * @since 1.1.0
+ */
+public class GroovyTemplateViewResolver extends UrlBasedViewResolver {
+
+	private TemplateEngine engine = new SimpleTemplateEngine();
+
+	private String charSet = "UTF-8";
+
+	public GroovyTemplateViewResolver() {
+		setViewClass(GroovyTemplateView.class);
+	}
+
+	/**
+	 * @param engine the engine to set
+	 */
+	public void setTemplateEngine(TemplateEngine engine) {
+		this.engine = engine;
+	}
+
+	/**
+	 * @param charSet the charSet to set
+	 */
+	public void setCharSet(String charSet) {
+		this.charSet = charSet;
+	}
+
+	@Override
+	protected View loadView(String viewName, Locale locale) throws Exception {
+		Resource resource = resolveResource(viewName, locale);
+		if (resource == null) {
+			return null;
+		}
+		Template template = this.engine.createTemplate(new InputStreamReader(resource
+				.getInputStream(), this.charSet));
+		GroovyTemplateView view = new GroovyTemplateView(template);
+		view.setApplicationContext(getApplicationContext());
+		view.setServletContext(getServletContext());
+		view.setContentType(getContentType());
+		return view;
+	}
+
+	private Resource resolveResource(String viewName, Locale locale) {
+		String l10n = "";
+		if (locale != null) {
+			LocaleEditor localeEditor = new LocaleEditor();
+			localeEditor.setValue(locale);
+			l10n = "_" + localeEditor.getAsText();
+		}
+		return resolveFromLocale(viewName, l10n);
+	}
+
+	private Resource resolveFromLocale(String viewName, String locale) {
+		Resource resource = getApplicationContext().getResource(
+				getPrefix() + viewName + locale + getSuffix());
+		if (resource == null || !resource.exists()) {
+			if (locale.isEmpty()) {
+				return null;
+			}
+			int index = locale.lastIndexOf("_");
+			return resolveFromLocale(viewName, locale.substring(0, index));
+		}
+		return resource;
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/groovy/template/web/LocaleAwareTemplate.java

+/*
+ * 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.boot.autoconfigure.groovy.template.web;
+
+import groovy.text.markup.BaseTemplate;
+import groovy.text.markup.MarkupTemplateEngine;
+import groovy.text.markup.TemplateConfiguration;
+
+import java.util.Map;
+
+import org.springframework.context.i18n.LocaleContextHolder;
+
+/**
+ * @author Dave Syer
+ */
+public abstract class LocaleAwareTemplate extends BaseTemplate {
+
+	public LocaleAwareTemplate(MarkupTemplateEngine templateEngine, Map<?, ?> model,
+			Map<String, String> modelTypes, TemplateConfiguration configuration) {
+		super(localize(templateEngine), model, modelTypes, localize(configuration));
+	}
+
+	private static MarkupTemplateEngine localize(MarkupTemplateEngine templateEngine) {
+		TemplateConfiguration templateConfiguration = templateEngine
+				.getTemplateConfiguration();
+		ClassLoader parent = templateEngine.getTemplateLoader().getParent();
+		return new MarkupTemplateEngine(parent, localize(templateConfiguration));
+	}
+
+	private static TemplateConfiguration localize(TemplateConfiguration configuration) {
+		TemplateConfiguration result = new TemplateConfiguration(configuration);
+		result.setLocale(LocaleContextHolder.getLocale());
+		return result;
+	}
+
+}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/groovy/template/GroovyTemplateAutoConfigurationTests.java

+/*
+ * Copyright 2012-2014 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.boot.autoconfigure.groovy.template;
+
+import groovy.text.TemplateEngine;
+
+import java.io.File;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Locale;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.beans.factory.BeanCreationException;
+import org.springframework.boot.autoconfigure.groovy.template.web.GroovyTemplateViewResolver;
+import org.springframework.boot.test.EnvironmentTestUtils;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import org.springframework.mock.web.MockServletContext;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.support.RequestContext;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for GroovyTemplateAutoConfiguration.
+ * 
+ * @author Dave Syer
+ */
+public class GroovyTemplateAutoConfigurationTests {
+
+	private AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
+
+	@Before
+	public void setupContext() {
+		this.context.setServletContext(new MockServletContext());
+	}
+
+	@After
+	public void close() {
+		LocaleContextHolder.resetLocaleContext();
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void defaultConfiguration() {
+		registerAndRefreshContext();
+		assertThat(this.context.getBean(GroovyTemplateViewResolver.class), notNullValue());
+	}
+
+	@Test(expected = BeanCreationException.class)
+	public void nonExistentTemplateLocation() {
+		registerAndRefreshContext("spring.groovy.template.prefix:"
+				+ "classpath:/does-not-exist/");
+	}
+
+	@Test
+	public void emptyTemplateLocation() {
+		new File("target/test-classes/templates/empty-directory").mkdir();
+		registerAndRefreshContext("spring.groovy.template.prefix:"
+				+ "classpath:/templates/empty-directory/");
+	}
+
+	@Test
+	public void defaultViewResolution() throws Exception {
+		registerAndRefreshContext();
+		MockHttpServletResponse response = render("home");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("home"));
+		assertThat(response.getContentType(), equalTo("text/html;charset=UTF-8"));
+	}
+
+	@Test
+	public void includesViewResolution() throws Exception {
+		registerAndRefreshContext();
+		MockHttpServletResponse response = render("includes");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("here"));
+		assertThat(response.getContentType(), equalTo("text/html;charset=UTF-8"));
+	}
+
+	@Test
+	public void localeViewResolution() throws Exception {
+		LocaleContextHolder.setLocale(Locale.FRENCH);
+		registerAndRefreshContext();
+		MockHttpServletResponse response = render("includes", Locale.FRENCH);
+		String result = response.getContentAsString();
+		assertThat(result, containsString("voila"));
+		assertThat(response.getContentType(), equalTo("text/html;charset=UTF-8"));
+	}
+
+	@Test
+	public void customContentType() throws Exception {
+		registerAndRefreshContext("spring.groovy.template.contentType:application/json");
+		MockHttpServletResponse response = render("home");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("home"));
+		assertThat(response.getContentType(), equalTo("application/json;charset=UTF-8"));
+	}
+
+	@Test
+	public void customPrefix() throws Exception {
+		registerAndRefreshContext("spring.groovy.template.prefix:classpath:/templates/prefix/");
+		MockHttpServletResponse response = render("prefixed");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("prefixed"));
+	}
+
+	@Test
+	public void customSuffix() throws Exception {
+		registerAndRefreshContext("spring.groovy.template.suffix:.groovytemplate");
+		MockHttpServletResponse response = render("suffixed");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("suffixed"));
+	}
+
+	@Test
+	public void customTemplateLoaderPath() throws Exception {
+		registerAndRefreshContext("spring.groovy.template.prefix:classpath:/custom-templates/");
+		MockHttpServletResponse response = render("custom");
+		String result = response.getContentAsString();
+		assertThat(result, containsString("custom"));
+	}
+
+	@Test
+	public void disableCache() {
+		registerAndRefreshContext("spring.groovy.template.cache:false");
+		assertThat(
+				this.context.getBean(GroovyTemplateViewResolver.class).getCacheLimit(),
+				equalTo(0));
+	}
+
+	@Test
+	public void renderTemplate() throws Exception {
+		registerAndRefreshContext();
+		TemplateEngine engine = this.context.getBean(TemplateEngine.class);
+		Writer writer = new StringWriter();
+		engine.createTemplate(new ClassPathResource("templates/message.tpl").getFile())
+				.make(new HashMap<String, Object>(Collections.singletonMap("greeting",
+						"Hello World"))).writeTo(writer);
+		assertThat(writer.toString(), containsString("Hello World"));
+	}
+
+	private void registerAndRefreshContext(String... env) {
+		EnvironmentTestUtils.addEnvironment(this.context, env);
+		this.context.register(GroovyTemplateAutoConfiguration.class);
+		this.context.refresh();
+	}
+
+	private MockHttpServletResponse render(String viewName) throws Exception {
+		return render(viewName, Locale.UK);
+	}
+
+	private MockHttpServletResponse render(String viewName, Locale locale)
+			throws Exception {
+		GroovyTemplateViewResolver resolver = this.context
+				.getBean(GroovyTemplateViewResolver.class);
+		View view = resolver.resolveViewName(viewName, locale);
+		assertThat(view, notNullValue());
+		HttpServletRequest request = new MockHttpServletRequest();
+		request.setAttribute(RequestContext.WEB_APPLICATION_CONTEXT_ATTRIBUTE,
+				this.context);
+		MockHttpServletResponse response = new MockHttpServletResponse();
+		view.render(null, request, response);
+		return response;
+	}
+}

spring-boot-autoconfigure/src/test/resources/custom-templates/custom.tpl

+yield "custom"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/home.tpl

+yield "home"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/included.tpl

+yield "here"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/included_fr.tpl

+yield "voila"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/includes.tpl

+yield "include"
+include template: "included.tpl"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/message.tpl

+yield "Message: ${greeting}"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/prefix/prefixed.tpl

+yield "prefixed"
\ No newline at end of file

spring-boot-autoconfigure/src/test/resources/templates/suffixed.groovytemplate

+yield """
+suffixed
+"""
\ No newline at end of file

spring-boot-dependencies/pom.xml

@@ -106,8 +106,9 @@
 		<spring-plugin.version>1.1.0.RELEASE</spring-plugin.version>
 		<spring-amqp.version>1.3.2.RELEASE</spring-amqp.version>
 		<spring-mobile.version>1.1.1.RELEASE</spring-mobile.version>
+		<spring-retry.version>1.1.0.RELEASE</spring-retry.version>
 		<spring-security.version>3.2.3.RELEASE</spring-security.version>
-		<spring-security-oauth.version>2.0.0.RC2</spring-security-oauth.version>
+		<spring-security-oauth.version>2.0.0.RELEASE</spring-security-oauth.version>
 		<spring-security-jwt.version>1.0.2.RELEASE</spring-security-jwt.version>
 		<thymeleaf.version>2.1.3.RELEASE</thymeleaf.version>
 		<thymeleaf-extras-springsecurity3.version>2.1.1.RELEASE</thymeleaf-extras-springsecurity3.version>
@@ -994,6 +995,11 @@
 				<artifactId>spring-mobile-device</artifactId>
 				<version>${spring-mobile.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.springframework.retry</groupId>
+				<artifactId>spring-retry</artifactId>
+				<version>${spring-retry.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>org.springframework.security</groupId>
 				<artifactId>spring-security-acl</artifactId>