Automatically apply development time properties

Add auto-configuration to automatically apply properties that make
sense during application development. Currently the single property
`spring.thymeleaf.cache` is set to `false`.

Closes gh-3083

spring-boot-developer-tools/src/main/java/org/springframework/boot/developertools/autoconfigure/LocalDeveloperPropertyDefaultsPostProcessor.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2012-2015 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.developertools.autoconfigure;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.context.EnvironmentAware;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.PropertySource;
+
+/**
+ * {@link BeanFactoryPostProcessor} to add properties that make sense when working
+ * locally.
+ *
+ * @author Phillip Webb
+ */
+class LocalDeveloperPropertyDefaultsPostProcessor implements BeanFactoryPostProcessor,
+		EnvironmentAware {
+
+	private static final Map<String, Object> PROPERTIES;
+	static {
+		Map<String, Object> properties = new HashMap<String, Object>();
+		properties.put("spring.thymeleaf.cache", "false");
+		PROPERTIES = Collections.unmodifiableMap(properties);
+	}
+
+	private Environment environment;
+
+	@Override
+	public void setEnvironment(Environment environment) {
+		this.environment = environment;
+	}
+
+	@Override
+	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
+			throws BeansException {
+		if (this.environment instanceof ConfigurableEnvironment) {
+			postProcessEnvironment((ConfigurableEnvironment) this.environment);
+		}
+	}
+
+	private void postProcessEnvironment(ConfigurableEnvironment environment) {
+		PropertySource<?> propertySource = new MapPropertySource("refresh", PROPERTIES);
+		environment.getPropertySources().addFirst(propertySource);
+	}
+
+}

spring-boot-developer-tools/src/main/java/org/springframework/boot/developertools/autoconfigure/LocalDeveloperToolsAutoConfiguration.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012-2015 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.developertools.autoconfigure;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * {@link EnableAutoConfiguration Auto-configuration} for local development support.
+ *
+ * @author Phillip Webb
+ * @since 1.3.0
+ */
+@Configuration
+public class LocalDeveloperToolsAutoConfiguration {
+
+	@Bean
+	public static LocalDeveloperPropertyDefaultsPostProcessor localDeveloperPropertyDefaultsPostProcessor() {
+		return new LocalDeveloperPropertyDefaultsPostProcessor();
+	}
+
+}

spring-boot-developer-tools/src/main/java/org/springframework/boot/developertools/autoconfigure/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012-2015 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.
+ */
+
+/**
+ * Auto-configuration for {@code spring-boot-developer-tools}.
+ */
+package org.springframework.boot.developertools.autoconfigure;
+

spring-boot-developer-tools/src/main/resources/META-INF/spring.factories

@@ -0,0 +1,3 @@
+# Auto Configure
+org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+org.springframework.boot.developertools.autoconfigure.LocalDeveloperToolsAutoConfiguration

spring-boot-developer-tools/src/test/java/org/springframework/boot/developertools/autoconfigure/LocalDeveloperToolsAutoConfigurationTests.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2012-2015 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.developertools.autoconfigure;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.After;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.util.SocketUtils;
+import org.thymeleaf.templateresolver.TemplateResolver;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link LocalDeveloperToolsAutoConfiguration}.
+ *
+ * @author Phillip Webb
+ */
+public class LocalDeveloperToolsAutoConfigurationTests {
+
+	@Rule
+	public ExpectedException thrown = ExpectedException.none();
+
+	private int liveReloadPort = SocketUtils.findAvailableTcpPort();
+
+	private ConfigurableApplicationContext context;
+
+	@After
+	public void cleanup() {
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void thymeleafCacheIsFalse() throws Exception {
+		this.context = initializeAndRun(Config.class);
+		TemplateResolver resolver = this.context.getBean(TemplateResolver.class);
+		resolver.initialize();
+		assertThat(resolver.isCacheable(), equalTo(false));
+	}
+
+	private ConfigurableApplicationContext initializeAndRun(Class<?> config) {
+		return initializeAndRun(config, Collections.<String, Object> emptyMap());
+	}
+
+	private ConfigurableApplicationContext initializeAndRun(Class<?> config,
+			Map<String, Object> properties) {
+		SpringApplication application = new SpringApplication(config);
+		application.setDefaultProperties(getDefaultProperties(properties));
+		application.setWebEnvironment(false);
+		ConfigurableApplicationContext context = application.run();
+		return context;
+	}
+
+	private Map<String, Object> getDefaultProperties(
+			Map<String, Object> specifiedProperties) {
+		Map<String, Object> properties = new HashMap<String, Object>();
+		properties.put("spring.thymeleaf.check-template-location", false);
+		properties.put("spring.developertools.livereload.port", this.liveReloadPort);
+		properties.putAll(specifiedProperties);
+		return properties;
+	}
+
+	@Configuration
+	@Import({ LocalDeveloperToolsAutoConfiguration.class,
+			ThymeleafAutoConfiguration.class })
+	public static class Config {
+
+	}
+
+}