Add log4j starter and some documentation

As discussed in gh-162

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/java/org/springframework/boot/sample/actuator/log4j/HelloWorldService.java

@@ -0,0 +1,32 @@
+/*
+ * 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.sample.actuator.log4j;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class HelloWorldService {
+
+	@Autowired
+	private ServiceProperties configuration;
+
+	public String getHelloMessage() {
+		return "Hello " + this.configuration.getName();
+	}
+
+}

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/java/org/springframework/boot/sample/actuator/log4j/SampleActuatorApplication.java

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+/*
+ * 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.sample.actuator.log4j;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableAutoConfiguration
+@EnableConfigurationProperties
+@ComponentScan
+public class SampleActuatorApplication {
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleActuatorApplication.class, args);
+	}
+
+}

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/java/org/springframework/boot/sample/actuator/log4j/SampleController.java

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+/*
+ * 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.sample.actuator.log4j;
+
+import java.util.Collections;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class SampleController {
+
+	@Autowired
+	private HelloWorldService helloWorldService;
+
+	@RequestMapping("/")
+	@ResponseBody
+	public Map<String, String> helloWorld() {
+		return Collections.singletonMap("message",
+				this.helloWorldService.getHelloMessage());
+	}
+
+	@RequestMapping("/foo")
+	@ResponseBody
+	public String foo() {
+		throw new IllegalArgumentException("Server error");
+	}
+}

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/java/org/springframework/boot/sample/actuator/log4j/ServiceProperties.java

@@ -0,0 +1,36 @@
+/*
+ * 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.sample.actuator.log4j;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@ConfigurationProperties(name = "service", ignoreUnknownFields = false)
+@Component
+public class ServiceProperties {
+
+	private String name = "World";
+
+	public String getName() {
+		return this.name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/resources/application.properties

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+logging.file: /tmp/logs/app.log
+management.port: 8080
+management.address: 127.0.0.1
+endpoints.shutdown.enabled: true
+server.port: 8080
+server.tomcat.basedir: target/tomcat
+server.tomcat.access_log_pattern: %h %t "%r" %s %b
+security.require_ssl: false
+service.name: Phil
+shell.ssh.enabled: true
+shell.ssh.port: 2222
+#shell.telnet.enabled: false
+#shell.telnet.port: 1111
+shell.auth: spring
+#shell.auth: key
+#shell.auth.key.path: ${user.home}/test/id_rsa.pub.pem
+#shell.auth: simple

spring-boot-samples/spring-boot-sample-actuator-log4j/src/main/resources/log4j.properties

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+log4j.rootCategory=INFO, CONSOLE
+
+PID=????
+LOG_PATTERN=[%d{yyyy-MM-dd HH:mm:ss.SSS}] log4j%X{context} - ${PID} %5p [%t] --- %c{1}: %m%n
+
+# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
+log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
+log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
+log4j.appender.CONSOLE.layout.ConversionPattern=${LOG_PATTERN}
+
+log4j.category.org.hibernate.validator.internal.util.Version=WARN
+log4j.category.org.apache.coyote.http11.Http11NioProtocol=WARN
+log4j.category.org.apache.tomcat.util.net.NioSelectorPool=WARN
+log4j.category.org.apache.catalina.startup.DigesterFactory=ERROR

spring-boot-samples/spring-boot-sample-actuator-log4j/src/test/java/org/springframework/boot/sample/actuator/log4j/SampleActuatorApplicationTests.java

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+/*
+ * 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.sample.actuator.log4j;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.springframework.boot.SpringApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.http.client.ClientHttpResponse;
+import org.springframework.web.client.DefaultResponseErrorHandler;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Basic integration tests for service demo application.
+ * 
+ * @author Dave Syer
+ */
+public class SampleActuatorApplicationTests {
+
+	private static ConfigurableApplicationContext context;
+
+	@BeforeClass
+	public static void start() throws Exception {
+		Future<ConfigurableApplicationContext> future = Executors
+				.newSingleThreadExecutor().submit(
+						new Callable<ConfigurableApplicationContext>() {
+							@Override
+							public ConfigurableApplicationContext call() throws Exception {
+								return SpringApplication
+										.run(SampleActuatorApplication.class);
+							}
+						});
+		context = future.get(60, TimeUnit.SECONDS);
+	}
+
+	@AfterClass
+	public static void stop() {
+		if (context != null) {
+			context.close();
+		}
+	}
+
+	@Test
+	public void testHome() throws Exception {
+		@SuppressWarnings("rawtypes")
+		ResponseEntity<Map> entity = getRestTemplate().getForEntity(
+				"http://localhost:8080", Map.class);
+		assertEquals(HttpStatus.OK, entity.getStatusCode());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> body = entity.getBody();
+		assertEquals("Hello Phil", body.get("message"));
+	}
+
+
+	private RestTemplate getRestTemplate() {
+		RestTemplate restTemplate = new RestTemplate();
+		restTemplate.setErrorHandler(new DefaultResponseErrorHandler() {
+			@Override
+			public void handleError(ClientHttpResponse response) throws IOException {
+			}
+		});
+		return restTemplate;
+
+	}
+
+}