72 lines
2.7 KiB
Java
72 lines
2.7 KiB
Java
/*
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* Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javacserver.util;
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import java.io.ByteArrayOutputStream;
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import java.io.FilterOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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public class LoggingOutputStream extends FilterOutputStream {
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private static final byte[] LINE_SEP = System.lineSeparator().getBytes();
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private final Log.Level level;
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private final String linePrefix;
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private EolTrackingByteArrayOutputStream buf = new EolTrackingByteArrayOutputStream();
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public LoggingOutputStream(OutputStream out, Log.Level level, String linePrefix) {
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super(out);
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this.level = level;
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this.linePrefix = linePrefix;
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}
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@Override
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public void write(int b) throws IOException {
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super.write(b);
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buf.write(b);
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if (buf.isLineComplete()) {
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String line = new String(buf.toByteArray(), 0, buf.size() - LINE_SEP.length);
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Log.log(level, linePrefix + line);
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buf = new EolTrackingByteArrayOutputStream();
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}
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}
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private static class EolTrackingByteArrayOutputStream extends ByteArrayOutputStream {
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private static final byte[] EOL = System.lineSeparator().getBytes();
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private boolean isLineComplete() {
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if (count < EOL.length) {
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return false;
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}
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for (int i = 0; i < EOL.length; i++) {
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if (buf[count - EOL.length + i] != EOL[i]) {
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return false;
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}
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}
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return true;
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}
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}
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}
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