| package org.apache.maven.plugin.surefire.report; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.RandomAccessFile; |
| import java.io.UncheckedIOException; |
| import java.lang.ref.SoftReference; |
| import java.nio.Buffer; |
| import java.nio.ByteBuffer; |
| import java.nio.file.Path; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static java.nio.file.Files.notExists; |
| import static java.nio.file.Files.size; |
| import static java.util.Objects.requireNonNull; |
| import static org.apache.maven.surefire.api.util.internal.StringUtils.NL; |
| |
| import org.apache.maven.surefire.api.util.SureFireFileManager; |
| |
| /** |
| * A deferred file output stream decorator that encodes the string from the VM to UTF-8. |
| * <br> |
| * The deferred file is temporary file, and it is created at the first {@link #write(String, boolean) write}. |
| * The {@link #writeTo(OutputStream) reads} can be called anytime. |
| * It is highly recommended to {@link #commit() commit} the cache which would close the file stream |
| * and subsequent reads may continue. |
| * The {@link #free()} method would commit and delete the deferred file. |
| * |
| * @author Andreas Gudian |
| */ |
| final class Utf8RecodingDeferredFileOutputStream |
| { |
| private static final byte[] NL_BYTES = NL.getBytes( UTF_8 ); |
| public static final int CACHE_SIZE = 64 * 1024; |
| |
| private final String channel; |
| private Path file; |
| private RandomAccessFile storage; |
| private boolean closed; |
| private SoftReference<byte[]> largeCache; |
| private ByteBuffer cache; |
| private boolean isDirty; |
| |
| Utf8RecodingDeferredFileOutputStream( String channel ) |
| { |
| this.channel = requireNonNull( channel ); |
| } |
| |
| public synchronized void write( String output, boolean newLine ) |
| throws IOException |
| { |
| if ( closed ) |
| { |
| return; |
| } |
| |
| if ( storage == null ) |
| { |
| |
| file = SureFireFileManager.createTempFile( channel, "deferred" ).toPath(); |
| storage = new RandomAccessFile( file.toFile(), "rw" ); |
| } |
| |
| if ( output == null ) |
| { |
| output = "null"; |
| } |
| |
| if ( cache == null ) |
| { |
| cache = ByteBuffer.allocate( CACHE_SIZE ); |
| } |
| |
| isDirty = true; |
| |
| byte[] decodedString = output.getBytes( UTF_8 ); |
| int newLineLength = newLine ? NL_BYTES.length : 0; |
| if ( cache.remaining() >= decodedString.length + newLineLength ) |
| { |
| cache.put( decodedString ); |
| if ( newLine ) |
| { |
| cache.put( NL_BYTES ); |
| } |
| } |
| else |
| { |
| ( (Buffer) cache ).flip(); |
| int minLength = cache.remaining() + decodedString.length + NL_BYTES.length; |
| byte[] buffer = getLargeCache( minLength ); |
| int bufferLength = 0; |
| System.arraycopy( cache.array(), cache.arrayOffset() + ( (Buffer) cache ).position(), |
| buffer, bufferLength, cache.remaining() ); |
| bufferLength += cache.remaining(); |
| ( (Buffer) cache ).clear(); |
| |
| System.arraycopy( decodedString, 0, buffer, bufferLength, decodedString.length ); |
| bufferLength += decodedString.length; |
| |
| if ( newLine ) |
| { |
| System.arraycopy( NL_BYTES, 0, buffer, bufferLength, NL_BYTES.length ); |
| bufferLength += NL_BYTES.length; |
| } |
| |
| storage.write( buffer, 0, bufferLength ); |
| } |
| } |
| |
| public synchronized long getByteCount() |
| { |
| try |
| { |
| sync(); |
| if ( storage != null && !closed ) |
| { |
| storage.getFD().sync(); |
| } |
| return file == null ? 0 : size( file ); |
| } |
| catch ( IOException e ) |
| { |
| return 0; |
| } |
| } |
| |
| @SuppressWarnings( "checkstyle:innerassignment" ) |
| public synchronized void writeTo( OutputStream out ) |
| throws IOException |
| { |
| if ( file != null && notExists( file ) ) |
| { |
| storage = null; |
| } |
| |
| if ( ( storage == null && file != null ) || ( storage != null && !storage.getChannel().isOpen() ) ) |
| { |
| storage = new RandomAccessFile( file.toFile(), "rw" ); |
| } |
| |
| if ( storage != null ) |
| { |
| sync(); |
| final long currentFilePosition = storage.getFilePointer(); |
| storage.seek( 0L ); |
| try |
| { |
| byte[] buffer = new byte[CACHE_SIZE]; |
| for ( int readCount; ( readCount = storage.read( buffer ) ) != -1; ) |
| { |
| out.write( buffer, 0, readCount ); |
| } |
| } |
| finally |
| { |
| storage.seek( currentFilePosition ); |
| } |
| } |
| } |
| |
| public synchronized void commit() |
| { |
| if ( storage == null ) |
| { |
| return; |
| } |
| |
| try |
| { |
| sync(); |
| storage.close(); |
| } |
| catch ( IOException e ) |
| { |
| throw new UncheckedIOException( e ); |
| } |
| finally |
| { |
| storage = null; |
| cache = null; |
| largeCache = null; |
| } |
| } |
| |
| public synchronized void free() |
| { |
| if ( !closed ) |
| { |
| closed = true; |
| if ( file != null ) |
| { |
| try |
| { |
| commit(); |
| //todo delete( file ); uncomment L485 assertThat( file ).doesNotExist() in StatelessXmlReporterTest |
| } |
| catch ( /*todo uncomment IOException |*/ UncheckedIOException e ) |
| { |
| /*todo uncomment file.toFile() |
| .deleteOnExit();*/ |
| } |
| finally |
| { |
| // todo should be removed after uncommented delete( file ) |
| file.toFile() |
| .deleteOnExit(); |
| } |
| |
| storage = null; |
| cache = null; |
| largeCache = null; |
| } |
| } |
| } |
| |
| private void sync() throws IOException |
| { |
| if ( !isDirty ) |
| { |
| return; |
| } |
| |
| isDirty = false; |
| |
| if ( storage != null && cache != null ) |
| { |
| ( (Buffer) cache ).flip(); |
| byte[] array = cache.array(); |
| int offset = cache.arrayOffset() + ( (Buffer) cache ).position(); |
| int length = cache.remaining(); |
| ( (Buffer) cache ).clear(); |
| storage.write( array, offset, length ); |
| // the data that you wrote with the mode "rw" may still only be kept in memory and may be read back |
| // storage.getFD().sync(); |
| } |
| } |
| |
| @SuppressWarnings( "checkstyle:innerassignment" ) |
| private byte[] getLargeCache( int minLength ) |
| { |
| byte[] buffer; |
| if ( largeCache == null || ( buffer = largeCache.get() ) == null || buffer.length < minLength ) |
| { |
| buffer = new byte[minLength]; |
| largeCache = new SoftReference<>( buffer ); |
| } |
| return buffer; |
| } |
| } |