/*
* Copyright 2003-2012 JetBrains s.r.o.
*
* Licensed 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.
*/
package jetbrains.mps.diagnostic;
import com.intellij.idea.IdeaApplication;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.components.ApplicationComponent;
import org.apache.log4j.Level;
import org.apache.log4j.spi.LoggingEvent;
import org.jetbrains.annotations.NotNull;
import java.util.LinkedList;
import java.util.Queue;
/**
* Delegates all the error messages to the parent which in turn sends all the errors to the IDE event log.
* Which is essential e.g. when the unchecked exceptions are thrown and not being caught.
*
* [Idea platform has default {@link java.lang.Thread.UncaughtExceptionHandler} which logs most of errors]
*/
public class MPSDialogAppender extends com.intellij.diagnostic.DialogAppender implements ApplicationComponent {
private static Queue<LoggingEvent> ourEvents = new LinkedList<LoggingEvent>();
@Override
protected synchronized void append(@NotNull final LoggingEvent event) {
assert event.getLevel().isGreaterOrEqual(Level.ERROR);
if (!IdeaApplication.isLoaded()) {
ourEvents.add(event);
} else {
super.append(event);
}
}
@Override
public void initComponent() {
// this is the only way I know to flush all gathered log events after the application is loaded
ApplicationManager.getApplication().invokeLater(new Runnable() {
@Override
public void run() {
flush();
}
});
}
public void flush() {
while (!ourEvents.isEmpty()) {
LoggingEvent event = ourEvents.poll();
super.append(event);
}
}
@Override
public void disposeComponent() {
}
@NotNull
@Override
public String getComponentName() {
return "MPS Dialog Appender";
}
}