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/*
* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package nsk.share.log;
import java.io.PrintStream;
/**
* Basic Log that outputs to PrintStream.
*
* This log also tries to catch OutOfMemoryErrors and retry.
*
* @see nsk.share.log.Log
*/
public class LogSupport implements Log {
private final int attempts = 2;
private PrintStream out;
private boolean infoEnabled = true;
private boolean debugEnabled = true;
private boolean warnEnabled = true;
private boolean errorEnabled = true;
public LogSupport() {
this(System.out);
}
public LogSupport(PrintStream out) {
this.out = out;
}
protected void logObject(Object o) {
if (o instanceof Throwable) {
logThrowable((Throwable) o);
return;
}
for (int i = 0; i < attempts; ++i) {
try {
out.println(o.toString());
out.flush();
break;
} catch (OutOfMemoryError e) {
System.gc();
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
}
}
}
out.flush();
}
protected void logThrowable(Throwable o) {
for (int i = 0; i < attempts; ++i) {
try {
o.printStackTrace(out);
out.flush();
break;
} catch (OutOfMemoryError e) {
System.gc();
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
}
}
}
out.flush();
}
public void info(Object o) {
if (infoEnabled)
logObject(o);
}
public void debug(Object o) {
if (debugEnabled)
logObject(o);
}
public void warn(Object o) {
if (warnEnabled)
logObject(o);
}
public void error(Object o) {
if (errorEnabled)
logObject(o);
}
public boolean isInfoEnabled() {
return infoEnabled;
}
public void setInfoEnabled(boolean infoEnabled) {
this.infoEnabled = infoEnabled;
}
public boolean isDebugEnabled() {
return debugEnabled;
}
public void setDebugEnabled(boolean debugEnabled) {
this.debugEnabled = debugEnabled;
}
public boolean isWarnEnabled() {
return warnEnabled;
}
public void setWarnEnabled(boolean warnEnabled) {
this.warnEnabled = warnEnabled;
}
public boolean isErrorEnabled() {
return errorEnabled;
}
public void setErrorEnabled(boolean errorEnabled) {
this.errorEnabled = errorEnabled;
}
public void setOut(PrintStream out) {
this.out = out;
}
}
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