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org.springframework.boot.StartupInfoLogger Maven / Gradle / Ivy
/*
* Copyright 2012-2021 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
*
* https://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;
import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.time.Duration;
import java.util.concurrent.Callable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.system.ApplicationHome;
import org.springframework.boot.system.ApplicationPid;
import org.springframework.context.ApplicationContext;
import org.springframework.core.log.LogMessage;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
/**
* Logs application information on startup.
*
* @author Phillip Webb
* @author Dave Syer
*/
class StartupInfoLogger {
private static final Log logger = LogFactory.getLog(StartupInfoLogger.class);
private static final long HOST_NAME_RESOLVE_THRESHOLD = 200;
private final Class sourceClass;
StartupInfoLogger(Class sourceClass) {
this.sourceClass = sourceClass;
}
void logStarting(Log applicationLog) {
Assert.notNull(applicationLog, "Log must not be null");
applicationLog.info(LogMessage.of(this::getStartingMessage));
applicationLog.debug(LogMessage.of(this::getRunningMessage));
}
void logStarted(Log applicationLog, Duration timeTakenToStartup) {
if (applicationLog.isInfoEnabled()) {
applicationLog.info(getStartedMessage(timeTakenToStartup));
}
}
private CharSequence getStartingMessage() {
StringBuilder message = new StringBuilder();
message.append("Starting ");
appendApplicationName(message);
appendVersion(message, this.sourceClass);
appendJavaVersion(message);
appendOn(message);
appendPid(message);
appendContext(message);
return message;
}
private CharSequence getRunningMessage() {
StringBuilder message = new StringBuilder();
message.append("Running with Spring Boot");
appendVersion(message, getClass());
message.append(", Spring");
appendVersion(message, ApplicationContext.class);
return message;
}
private CharSequence getStartedMessage(Duration timeTakenToStartup) {
StringBuilder message = new StringBuilder();
message.append("Started ");
appendApplicationName(message);
message.append(" in ");
message.append(timeTakenToStartup.toMillis() / 1000.0);
message.append(" seconds");
try {
double uptime = ManagementFactory.getRuntimeMXBean().getUptime() / 1000.0;
message.append(" (JVM running for ").append(uptime).append(")");
}
catch (Throwable ex) {
// No JVM time available
}
return message;
}
private void appendApplicationName(StringBuilder message) {
String name = (this.sourceClass != null) ? ClassUtils.getShortName(this.sourceClass) : "application";
message.append(name);
}
private void appendVersion(StringBuilder message, Class source) {
append(message, "v", () -> source.getPackage().getImplementationVersion());
}
private void appendOn(StringBuilder message) {
long startTime = System.currentTimeMillis();
append(message, "on ", () -> InetAddress.getLocalHost().getHostName());
long resolveTime = System.currentTimeMillis() - startTime;
if (resolveTime > HOST_NAME_RESOLVE_THRESHOLD) {
logger.warn(LogMessage.of(() -> {
StringBuilder warning = new StringBuilder();
warning.append("InetAddress.getLocalHost().getHostName() took ");
warning.append(resolveTime);
warning.append(" milliseconds to respond.");
warning.append(" Please verify your network configuration");
if (System.getProperty("os.name").toLowerCase().contains("mac")) {
warning.append(" (macOS machines may need to add entries to /etc/hosts)");
}
warning.append(".");
return warning;
}));
}
}
private void appendPid(StringBuilder message) {
append(message, "with PID ", ApplicationPid::new);
}
private void appendContext(StringBuilder message) {
StringBuilder context = new StringBuilder();
ApplicationHome home = new ApplicationHome(this.sourceClass);
if (home.getSource() != null) {
context.append(home.getSource().getAbsolutePath());
}
append(context, "started by ", () -> System.getProperty("user.name"));
append(context, "in ", () -> System.getProperty("user.dir"));
if (context.length() > 0) {
message.append(" (");
message.append(context);
message.append(")");
}
}
private void appendJavaVersion(StringBuilder message) {
append(message, "using Java ", () -> System.getProperty("java.version"));
}
private void append(StringBuilder message, String prefix, Callable call) {
append(message, prefix, call, "");
}
private void append(StringBuilder message, String prefix, Callable call, String defaultValue) {
Object result = callIfPossible(call);
String value = (result != null) ? result.toString() : null;
if (!StringUtils.hasLength(value)) {
value = defaultValue;
}
if (StringUtils.hasLength(value)) {
message.append((message.length() > 0) ? " " : "");
message.append(prefix);
message.append(value);
}
}
private Object callIfPossible(Callable call) {
try {
return call.call();
}
catch (Exception ex) {
return null;
}
}
}
