145 lines
4.5 KiB
Java
145 lines
4.5 KiB
Java
/*
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* Copyright (c) 2007, 2018, 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.
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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 nsk.share.log;
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import java.io.PrintStream;
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/**
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* Basic Log that outputs to PrintStream.
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*
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* This log also tries to catch OutOfMemoryErrors and retry.
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*
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* @see nsk.share.log.Log
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*/
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public class LogSupport implements Log {
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private final int attempts = 2;
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private PrintStream out;
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private boolean infoEnabled = true;
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private boolean debugEnabled = true;
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private boolean warnEnabled = true;
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private boolean errorEnabled = true;
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public LogSupport() {
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this(System.out);
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}
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public LogSupport(PrintStream out) {
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this.out = out;
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}
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protected void logObject(Object o) {
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if (o instanceof Throwable) {
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logThrowable((Throwable) o);
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return;
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}
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for (int i = 0; i < attempts; ++i) {
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try {
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out.println(o.toString());
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out.flush();
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break;
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} catch (OutOfMemoryError e) {
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System.gc();
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try {
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Thread.sleep(500);
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} catch (InterruptedException ie) {
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}
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}
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}
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out.flush();
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}
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protected void logThrowable(Throwable o) {
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for (int i = 0; i < attempts; ++i) {
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try {
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o.printStackTrace(out);
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out.flush();
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break;
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} catch (OutOfMemoryError e) {
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System.gc();
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try {
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Thread.sleep(500);
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} catch (InterruptedException ie) {
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}
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}
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}
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out.flush();
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}
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public void info(Object o) {
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if (infoEnabled)
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logObject(o);
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}
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public void debug(Object o) {
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if (debugEnabled)
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logObject(o);
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}
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public void warn(Object o) {
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if (warnEnabled)
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logObject(o);
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}
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public void error(Object o) {
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if (errorEnabled)
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logObject(o);
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}
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public boolean isInfoEnabled() {
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return infoEnabled;
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}
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public void setInfoEnabled(boolean infoEnabled) {
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this.infoEnabled = infoEnabled;
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}
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public boolean isDebugEnabled() {
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return debugEnabled;
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}
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public void setDebugEnabled(boolean debugEnabled) {
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this.debugEnabled = debugEnabled;
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}
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public boolean isWarnEnabled() {
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return warnEnabled;
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}
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public void setWarnEnabled(boolean warnEnabled) {
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this.warnEnabled = warnEnabled;
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}
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public boolean isErrorEnabled() {
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return errorEnabled;
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}
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public void setErrorEnabled(boolean errorEnabled) {
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this.errorEnabled = errorEnabled;
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}
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public void setOut(PrintStream out) {
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this.out = out;
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}
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}
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