Add support for rebinding log levels

pom.xml

@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.1.4.BUILD-SNAPSHOT</version>
+		<version>1.1.5.BUILD-SNAPSHOT</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<modules>

spring-platform-config-client/src/main/java/org/springframework/platform/autoconfigure/RefreshAutoConfiguration.java

@@ -46,6 +46,7 @@ import org.springframework.platform.context.restart.RestartEndpoint;
 import org.springframework.platform.context.restart.RestartMvcEndpoint;
 import org.springframework.platform.context.scope.refresh.RefreshScope;
 import org.springframework.platform.endpoint.GenericPostableMvcEndpoint;
+import org.springframework.platform.logging.LoggingRebinder;
 
 @Configuration
 @ConditionalOnClass(RefreshScope.class)
@@ -58,6 +59,12 @@ public class RefreshAutoConfiguration {
 		return new RefreshScope();
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	public static LoggingRebinder loggingRebinder() {
+		return new LoggingRebinder();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public EnvironmentManager environmentManager(ConfigurableEnvironment environment) {

spring-platform-config-client/src/main/java/org/springframework/platform/logging/LoggingRebinder.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2013-2014 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.platform.logging;
+
+import org.springframework.boot.logging.LoggingApplicationListener;
+import org.springframework.boot.logging.LoggingSystem;
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.EnvironmentAware;
+import org.springframework.core.env.Environment;
+import org.springframework.platform.context.environment.EnvironmentChangeEvent;
+
+/**
+ * @author Dave Syer
+ *
+ */
+public class LoggingRebinder implements
+		ApplicationListener<EnvironmentChangeEvent>, EnvironmentAware {
+
+	private Environment environment;
+
+	private LoggingApplicationListener delegate = new LoggingApplicationListener();
+
+	@Override
+	public void setEnvironment(Environment environment) {
+		this.environment = environment;
+	}
+
+	@Override
+	public void onApplicationEvent(EnvironmentChangeEvent event) {
+		if (environment == null) {
+			return;
+		}
+		LoggingSystem system = LoggingSystem.get(LoggingSystem.class
+				.getClassLoader());
+		delegate.setLogLevels(system, environment);
+	}
+
+}

spring-platform-config-client/src/test/java/org/springframework/platform/logging/LoggingRebinderTests.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2013-2014 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.platform.logging;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Collections;
+
+import org.junit.After;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.logging.LogLevel;
+import org.springframework.boot.logging.LoggingSystem;
+import org.springframework.boot.test.EnvironmentTestUtils;
+import org.springframework.core.env.StandardEnvironment;
+import org.springframework.platform.context.environment.EnvironmentChangeEvent;
+
+/**
+ * @author Dave Syer
+ *
+ */
+public class LoggingRebinderTests {
+
+	private LoggingRebinder rebinder = new LoggingRebinder();
+	private Logger logger = LoggerFactory.getLogger("org.springframework.web");
+	
+	@After
+	public void reset() {
+		LoggingSystem.get(getClass().getClassLoader()).setLogLevel("org.springframework.web", LogLevel.INFO);
+	}
+
+	@Test
+	public void logLevelsChanged() {
+		assertFalse(logger.isTraceEnabled());
+		StandardEnvironment environment = new StandardEnvironment();
+		EnvironmentTestUtils.addEnvironment(environment, "logging.level.org.springframework.web=TRACE");
+		rebinder.setEnvironment(environment);
+		rebinder.onApplicationEvent(new EnvironmentChangeEvent(Collections.singleton("logging.level.org.springframework.web")));
+		assertTrue(logger.isTraceEnabled());
+	}
+
+}

spring-platform-config-sample/pom.xml

@@ -43,7 +43,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<start-class>org.springframework.platform.config.server.Application</start-class>
+		<start-class>sample.Application</start-class>
 		<java.version>1.7</java.version>
 	</properties>