org.springframework.boot.logging.LogFile Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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.logging;
import java.util.Properties;
import org.springframework.core.env.Environment;
import org.springframework.core.env.PropertyResolver;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* A reference to a log output file. Log output files are specified using
* {@code logging.file} or {@code logging.path} {@link Environment} properties. If the
* {@code logging.file} property is not specified {@code "spring.log"} will be written in
* the {@code logging.path} directory.
*
* @author Phillip Webb
* @since 1.2.1
* @see #get(PropertyResolver)
*/
public class LogFile {
/**
* The name of the Spring property that contains the name of the log file. Names can
* be an exact location or relative to the current directory.
*/
public static final String FILE_PROPERTY = "logging.file";
/**
* The name of the Spring property that contains the directory where log files are
* written.
*/
public static final String PATH_PROPERTY = "logging.path";
private final String file;
private final String path;
/**
* Create a new {@link LogFile} instance.
* @param file a reference to the file to write
*/
LogFile(String file) {
this(file, null);
}
/**
* Create a new {@link LogFile} instance.
* @param file a reference to the file to write
* @param path a reference to the logging path to use if {@code file} is not specified
*/
LogFile(String file, String path) {
Assert.isTrue(StringUtils.hasLength(file) || StringUtils.hasLength(path),
"File or Path must not be empty");
this.file = file;
this.path = path;
}
/**
* Apply log file details to {@code LOG_PATH} and {@code LOG_FILE} system properties.
*/
public void applyToSystemProperties() {
applyTo(System.getProperties());
}
/**
* Apply log file details to {@code LOG_PATH} and {@code LOG_FILE} map entries.
* @param properties the properties to apply to
*/
public void applyTo(Properties properties) {
put(properties, "LOG_PATH", this.path);
put(properties, "LOG_FILE", toString());
}
private void put(Properties properties, String key, String value) {
if (StringUtils.hasLength(value)) {
properties.put(key, value);
}
}
@Override
public String toString() {
if (StringUtils.hasLength(this.file)) {
return this.file;
}
String path = this.path;
if (!path.endsWith("/")) {
path = path + "/";
}
return StringUtils.applyRelativePath(path, "spring.log");
}
/**
* Get a {@link LogFile} from the given Spring {@link Environment}.
* @param propertyResolver the {@link PropertyResolver} used to obtain the logging
* properties
* @return a {@link LogFile} or {@code null} if the environment didn't contain any
* suitable properties
*/
public static LogFile get(PropertyResolver propertyResolver) {
String file = propertyResolver.getProperty(FILE_PROPERTY);
String path = propertyResolver.getProperty(PATH_PROPERTY);
if (StringUtils.hasLength(file) || StringUtils.hasLength(path)) {
return new LogFile(file, path);
}
return null;
}
}