Add a logging system, starter and sample for Log4j 2

Closes gh-1565

spring-boot-samples/spring-boot-sample-actuator-log4j2/src/main/java/sample/actuator/log4j2/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 sample.actuator.log4j2;
+
+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-log4j2/src/main/java/sample/actuator/log4j2/SampleActuatorApplication.java

@@ -0,0 +1,35 @@
+/*
+ * 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 sample.actuator.log4j2;
+
+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-log4j2/src/main/java/sample/actuator/log4j2/SampleController.java

@@ -0,0 +1,45 @@
+/*
+ * 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 sample.actuator.log4j2;
+
+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-log4j2/src/main/java/sample/actuator/log4j2/ServiceProperties.java

@@ -0,0 +1,36 @@
+/*
+ * 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 sample.actuator.log4j2;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@ConfigurationProperties(prefix = "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-log4j2/src/main/resources/application.properties

@@ -0,0 +1,17 @@
+logging.file: /tmp/logs/app.log
+#server.port: 8080
+#management.port: 8080
+management.address: 127.0.0.1
+endpoints.shutdown.enabled: true
+server.tomcat.basedir: target/tomcat
+server.tomcat.access_log_pattern: %h %t "%r" %s %b
+security.require_ssl: false
+service.name: Daniel
+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-log4j2/src/main/resources/log4j2.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Properties>
+        <Property name="PID">????</Property>
+        <Property name="LOG_PATTERN">[%d{yyyy-MM-dd HH:mm:ss.SSS}] log4j2%X{context} - ${sys:PID} %5p [%t] --- %c{1}: %m%n</Property>
+    </Properties>
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT" follow="true">
+            <PatternLayout pattern="${LOG_PATTERN}"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Logger name="org.hibernate.validator.internal.util.Version" level="warn" />
+        <Logger name="org.apache.coyote.http11.Http11NioProtocol" level="warn" />
+        <Logger name="org.apache.tomcat.util.net.NioSelectorPool" level="warn" />
+        <Logger name="org.apache.catalina.startup.DigesterFactory" level="error" />
+
+        <Root level="info">
+            <AppenderRef ref="Console"/>
+        </Root>
+    </Loggers>
+</Configuration>

spring-boot-samples/spring-boot-sample-actuator-log4j2/src/test/java/sample/actuator/log4j2/SampleActuatorApplicationTests.java

@@ -0,0 +1,61 @@
+/*
+ * 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 sample.actuator.log4j2;
+
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Basic integration tests for service demo application.
+ *
+ * @author Dave Syer
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@WebAppConfiguration
+@IntegrationTest("server.port=0")
+@DirtiesContext
+public class SampleActuatorApplicationTests {
+
+	@Value("${local.server.port}")
+	private int port;
+
+	@Test
+	public void testHome() throws Exception {
+		@SuppressWarnings("rawtypes")
+		ResponseEntity<Map> entity = new TestRestTemplate().getForEntity(
+				"http://localhost:" + port, Map.class);
+		assertEquals(HttpStatus.OK, entity.getStatusCode());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> body = entity.getBody();
+		assertEquals("Hello Daniel", body.get("message"));
+	}
+
+}