mirror of
https://github.com/google/nomulus.git
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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
71 lines
2.5 KiB
Java
71 lines
2.5 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.rde;
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import static com.google.common.base.Preconditions.checkArgument;
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import com.google.auto.factory.AutoFactory;
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import google.registry.util.ImprovedOutputStream;
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import google.registry.util.PosixTarHeader;
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import org.joda.time.DateTime;
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import java.io.IOException;
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import java.io.OutputStream;
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import javax.annotation.WillNotClose;
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/**
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* Single-file POSIX tar archive creator that wraps an {@link OutputStream}.
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*/
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@AutoFactory(allowSubclasses = true)
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public class RydeTarOutputStream extends ImprovedOutputStream {
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/**
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* Creates a new instance that outputs a tar archive.
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*
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* @param os is the upstream {@link OutputStream} which is not closed by this object
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* @param size is the length in bytes of the one file, which you will write to this object
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* @param modified is the {@link PosixTarHeader.Builder#setMtime mtime} you want to set
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* @param filename is the name of the one file that will be contained in this archive
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* @throws RuntimeException to rethrow {@link IOException}
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* @throws IllegalArgumentException if {@code size} is negative
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*/
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public RydeTarOutputStream(
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@WillNotClose OutputStream os, long size, DateTime modified, String filename) {
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super(os, false, size);
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checkArgument(size >= 0);
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checkArgument(filename.endsWith(".xml"),
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"Ryde expects tar archive to contain a filename with an '.xml' extension.");
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try {
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os.write(new PosixTarHeader.Builder()
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.setName(filename)
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.setSize(size)
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.setMtime(modified)
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.build()
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.getBytes());
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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/** Writes the end of archive marker. */
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@Override
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public void onClose() throws IOException {
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// Round up to a 512-byte boundary and another 1024-bytes to indicate end of archive.
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write(new byte[1024 + 512 - (int) (getBytesWritten() % 512L)]);
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}
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}
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