com.google.gwt.logging.impl.FormatterImpl Maven / Gradle / Ivy
/*
* Copyright 2010 Google Inc.
*
* 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 com.google.gwt.logging.impl;
import com.google.gwt.core.client.impl.SerializableThrowable;
import java.util.Date;
import java.util.HashSet;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
/**
* Base class for Formatters - provides common functionality.
*/
public abstract class FormatterImpl extends Formatter {
/**
* Note that this format is likely to change in the future.
* Outputs the meta information in the log record in the following format:
* Date LoggerName\nLEVEL:
* Most formatters will append the message right after the colon
*/
protected String getRecordInfo(LogRecord event, String newline) {
Date date = new Date(event.getMillis());
StringBuilder s = new StringBuilder();
s.append(date.toString());
s.append(" ");
s.append(event.getLoggerName());
s.append(newline);
s.append(event.getLevel().getName());
s.append(": ");
return s.toString();
}
// This method is borrowed from AbstractTreeLogger.
// TODO(unnurg): once there is a clear place where code used by gwt-dev and
// gwt-user can live, move this function there.
protected String getStackTraceAsString(Throwable e, String newline,
String indent) {
if (e == null) {
return "";
}
// For each cause, print the requested number of entries of its stack
// trace, being careful to avoid getting stuck in an infinite loop.
//
StringBuffer s = new StringBuffer(newline);
Throwable currentCause = e;
String causedBy = "";
HashSet seenCauses = new HashSet();
while (currentCause != null && !seenCauses.contains(currentCause)) {
seenCauses.add(currentCause);
s.append(causedBy);
causedBy = newline + "Caused by: "; // after 1st, all say "caused by"
if (currentCause instanceof SerializableThrowable.ThrowableWithClassName) {
s.append(((SerializableThrowable.ThrowableWithClassName) currentCause).getExceptionClass());
} else {
s.append(currentCause.getClass().getName());
}
s.append(": " + currentCause.getMessage());
StackTraceElement[] stackElems = currentCause.getStackTrace();
if (stackElems != null) {
for (int i = 0; i < stackElems.length; ++i) {
s.append(newline + indent + "at ");
s.append(stackElems[i].toString());
}
}
currentCause = currentCause.getCause();
}
return s.toString();
}
}