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8ec2eaf39c
Second step of RDE encoding refactoring. Creates a single OutputStream encode RyDE files. This replaces the 5 OutputStreams that were needed before. Also removes all the factories that were injected. It's an encoding, there's no point in injecting it. Finally, removed the buffer-size configuration and replaced with a static final const value in each individual OutputStream. This doesn't yet include a decoder (InputStream). And there's still a lot of overlap between the Ryde and the Ghostryde code. Both of those are left for the next CLs. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=204898369
74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
// Copyright 2017 The Nomulus 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 google.registry.util.ImprovedOutputStream;
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import google.registry.util.PosixTarHeader;
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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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import org.joda.time.DateTime;
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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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public class RydeTarOutputStream extends ImprovedOutputStream {
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private final long expectedSize;
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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("RydeTarOutputStream", os, false);
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checkArgument(size >= 0);
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this.expectedSize = size;
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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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if (getBytesWritten() != expectedSize) {
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throw new IOException(
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String.format(
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"RydeTarOutputStream expected %,d bytes, but got %,d bytes",
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expectedSize, getBytesWritten()));
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}
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// Round up to a 512-byte boundary and another 1024-bytes to indicate end of archive.
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out.write(new byte[1024 + 512 - (int) (getBytesWritten() % 512L)]);
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}
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}
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