spring ImagePackager 源码
springboot ImagePackager 代码
文件路径：/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/ImagePackager.java
/*
* 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.loader.tools;
import java.io.File;
import java.io.IOException;
import java.util.function.BiConsumer;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
import org.springframework.util.Assert;
/**
* Utility class that can be used to export a fully packaged archive to an OCI image.
*
* @author Phillip Webb
* @author Scott Frederick
* @since 2.3.0
*/
public class ImagePackager extends Packager {
/**
* Create a new {@link ImagePackager} instance.
* @param source the source file to package
* @param backupFile the backup of the source file to package
*/
public ImagePackager(File source, File backupFile) {
super(source);
setBackupFile(backupFile);
if (isAlreadyPackaged()) {
Assert.isTrue(getBackupFile().exists() && getBackupFile().isFile(),
"Original source '" + getBackupFile() + "' is required for building an image");
Assert.state(!isAlreadyPackaged(getBackupFile()),
() -> "Repackaged archive file " + source + " cannot be used to build an image");
}
}
/**
* Create a packaged image.
* @param libraries the contained libraries
* @param exporter the exporter used to write the image
* @throws IOException on IO error
*/
public void packageImage(Libraries libraries, BiConsumer<ZipEntry, EntryWriter> exporter) throws IOException {
packageImage(libraries, new DelegatingJarWriter(exporter));
}
private void packageImage(Libraries libraries, AbstractJarWriter writer) throws IOException {
File source = isAlreadyPackaged() ? getBackupFile() : getSource();
try (JarFile sourceJar = new JarFile(source)) {
write(sourceJar, libraries, writer);
}
}
/**
* {@link AbstractJarWriter} that delegates to a {@link BiConsumer}.
*/
private static class DelegatingJarWriter extends AbstractJarWriter {
private BiConsumer<ZipEntry, EntryWriter> exporter;
DelegatingJarWriter(BiConsumer<ZipEntry, EntryWriter> exporter) {
this.exporter = exporter;
}
@Override
protected void writeToArchive(ZipEntry entry, EntryWriter entryWriter) throws IOException {
this.exporter.accept(entry, entryWriter);
}
}
}
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- 本文标签： Spring Boot Java Spring
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