/*
* 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.loader.tools;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.Map.Entry;
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);
FileOutputStream outputStream = new FileOutputStream(this.outputFile);
try {
properties.store(outputStream, "Properties");
}
finally {
try {
outputStream.close();
}
catch (IOException ex) {
// Continue
}
}
}
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());
properties.put("build.time", formatDate(new Date()));
if (project.getAdditionalProperties() != null) {
for (Map.Entry<String, String> entry : project.getAdditionalProperties()
.entrySet()) {
properties.put("build." + entry.getKey(), entry.getValue());
}
}
return properties;
}
private String formatDate(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
return sdf.format(date);
}
/**
* 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 Map<String, String> additionalProperties;
public ProjectDetails(String group, String artifact, String version, String name,
Map<String, String> additionalProperties) {
this.group = group;
this.artifact = artifact;
this.name = name;
this.version = version;
validateAdditionalProperties(additionalProperties);
this.additionalProperties = additionalProperties;
}
private static void validateAdditionalProperties(
Map<String, String> additionalProperties) {
if (additionalProperties != null) {
for (Entry<String, String> property : additionalProperties.entrySet()) {
if (property.getValue() == null) {
throw new NullAdditionalPropertyValueException(property.getKey());
}
}
}
}
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 Map<String, String> 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");
}
}
}