/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.scribe.pen.probe;
import org.smallmind.scribe.pen.Discriminator;
import org.smallmind.scribe.pen.Level;
import org.smallmind.scribe.pen.Logger;
public class ProbeFactory {
private static final ProbeStackThreadLocal PROBE_STACK_LOCAL = new ProbeStackThreadLocal();
private static final ThreadLocal<Throwable> THROWABLE_LOCAL = new ThreadLocal<Throwable>();
private static final ThreadLocal<byte[]> IDENTIFIER_LOCAL = new ThreadLocal<byte[]>();
public static void setIdentifier (byte[] identifier) {
IDENTIFIER_LOCAL.set(identifier);
}
public static byte[] getIdentifier () {
return IDENTIFIER_LOCAL.get();
}
public static void setThrowable (Throwable throwable) {
THROWABLE_LOCAL.set(throwable);
}
public static Throwable getThrowable () {
return THROWABLE_LOCAL.get();
}
public static Probe getProbe () {
return PROBE_STACK_LOCAL.get().peek();
}
public static Probe createProbe (Logger logger, Discriminator discriminator, Level level, String title) {
return PROBE_STACK_LOCAL.get().push(logger, discriminator, level, title);
}
protected static void closeProbe (Probe probe)
throws ProbeException {
PROBE_STACK_LOCAL.get().pop(probe);
}
public static void executeInstrumentation (Logger logger, Discriminator discriminator, Level level, String title, Instrument instrument)
throws ProbeException {
Probe probe = createProbe(logger, discriminator, level, title);
probe.start();
try {
instrument.withProbe(probe);
}
catch (ProbeException probeException) {
probe.abort();
throw probeException;
}
catch (Exception exception) {
probe.abort(exception);
throw new ProbeException(exception);
}
finally {
if (!probe.isAborted()) {
probe.stop();
}
}
}
public static <T> T executeInstrumentationAndReturn (Logger logger, Discriminator discriminator, Level level, String title, InstrumentAndReturn<T> instrumentAndReturn)
throws ProbeException {
Probe probe = createProbe(logger, discriminator, level, title);
probe.start();
try {
return instrumentAndReturn.withProbe(probe);
}
catch (ProbeException probeException) {
probe.abort();
throw probeException;
}
catch (Exception exception) {
probe.abort(exception);
throw new ProbeException(exception);
}
finally {
if (!probe.isAborted()) {
probe.stop();
}
}
}
private static class ProbeStackThreadLocal extends InheritableThreadLocal<ProbeStack> {
protected ProbeStack initialValue () {
return new ProbeStack(getIdentifier());
}
protected ProbeStack childValue (ProbeStack parentValue) {
return new ProbeStack(parentValue.getCurrentIdentifier());
}
}
}