org.springframework.boot.loader.tools.BuildPropertiesWriter Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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.loader.tools;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.time.Instant;
import java.time.format.DateTimeFormatter;
import java.util.Map;
import java.util.Properties;
/**
* A {@code BuildPropertiesWriter} writes the {@code build-info.properties} for
* consumption by the Actuator.
*
* @author Andy Wilkinson
* @author Stephane Nicoll
*/
public final class BuildPropertiesWriter {
private final File outputFile;
/**
* Creates a new {@code BuildPropertiesWriter} that will write to the given
* {@code outputFile}.
* @param outputFile the output file
*/
public BuildPropertiesWriter(File outputFile) {
this.outputFile = outputFile;
}
public void writeBuildProperties(ProjectDetails projectDetails) throws IOException {
Properties properties = createBuildInfo(projectDetails);
createFileIfNecessary(this.outputFile);
try (FileOutputStream outputStream = new FileOutputStream(this.outputFile)) {
properties.store(outputStream, "Properties");
}
}
private void createFileIfNecessary(File file) throws IOException {
if (file.exists()) {
return;
}
File parent = file.getParentFile();
if (!parent.isDirectory() && !parent.mkdirs()) {
throw new IllegalStateException("Cannot create parent directory for '"
+ this.outputFile.getAbsolutePath() + "'");
}
if (!file.createNewFile()) {
throw new IllegalStateException("Cannot create target file '"
+ this.outputFile.getAbsolutePath() + "'");
}
}
protected Properties createBuildInfo(ProjectDetails project) {
Properties properties = new Properties();
properties.put("build.group", project.getGroup());
properties.put("build.artifact", project.getArtifact());
properties.put("build.name", project.getName());
properties.put("build.version", project.getVersion());
if (project.getTime() != null) {
properties.put("build.time",
DateTimeFormatter.ISO_INSTANT.format(project.getTime()));
}
if (project.getAdditionalProperties() != null) {
project.getAdditionalProperties()
.forEach((name, value) -> properties.put("build." + name, value));
}
return properties;
}
/**
* Build-system agnostic details of a project.
*/
public static final class ProjectDetails {
private final String group;
private final String artifact;
private final String name;
private final String version;
private final Instant time;
private final Map additionalProperties;
public ProjectDetails(String group, String artifact, String version, String name,
Instant time, Map additionalProperties) {
this.group = group;
this.artifact = artifact;
this.name = name;
this.version = version;
this.time = time;
validateAdditionalProperties(additionalProperties);
this.additionalProperties = additionalProperties;
}
private static void validateAdditionalProperties(
Map additionalProperties) {
if (additionalProperties != null) {
additionalProperties.forEach((name, value) -> {
if (value == null) {
throw new NullAdditionalPropertyValueException(name);
}
});
}
}
public String getGroup() {
return this.group;
}
public String getArtifact() {
return this.artifact;
}
public String getName() {
return this.name;
}
public String getVersion() {
return this.version;
}
public Instant getTime() {
return this.time;
}
public Map getAdditionalProperties() {
return this.additionalProperties;
}
}
/**
* Exception thrown when an additional property with a null value is encountered.
*/
public static class NullAdditionalPropertyValueException
extends IllegalArgumentException {
public NullAdditionalPropertyValueException(String name) {
super("Additional property '" + name + "' is illegal as its value is null");
}
}
}