/**
* Logback: the reliable, fast and flexible logging library for Java.
*
* Copyright (C) 1999-2006, QOS.ch
*
* This library is free software, you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation.
*/
package ch.qos.logback.core.util;
import java.io.PrintStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import ch.qos.logback.core.Context;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.helpers.ThrowableToStringArray;
import ch.qos.logback.core.status.ErrorStatus;
import ch.qos.logback.core.status.Status;
import ch.qos.logback.core.status.StatusManager;
public class StatusPrinter {
private static PrintStream ps = System.out;
static SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
"HH:mm:ss,SSS");
public static void setPrintStream(PrintStream printStream) {
ps = printStream;
}
/**
* Print the contents of the context statuses, but only if they contain
* errors.
*
* @param context
*/
public static void printIfErrorsOccured(Context context) {
if (context == null) {
throw new IllegalArgumentException("Context argument cannot be null");
}
StatusManager sm = context.getStatusManager();
if (sm == null) {
ps.println("WARN: Context named \"" + context.getName()
+ "\" has no status manager");
} else {
if (sm.getLevel() == ErrorStatus.ERROR) {
print(sm);
}
}
}
/**
* Print the contents of the context's status data.
*
* @param context
*/
public static void print(Context context) {
if (context == null) {
throw new IllegalArgumentException("Context argument cannot be null");
}
StatusManager sm = context.getStatusManager();
if (sm == null) {
ps.println("WARN: Context named \"" + context.getName()
+ "\" has no status manager");
} else {
print(sm);
}
}
public static void print(StatusManager sm) {
StringBuilder sb = new StringBuilder();
buildStrFromStatusManager(sb, sm);
ps.println(sb.toString());
}
public static void print(List<Status> statusList) {
StringBuilder sb = new StringBuilder();
buildStrFromStatusList(sb, statusList);
ps.println(sb.toString());
}
private static void buildStrFromStatusList(StringBuilder sb, List<Status> statusList) {
Iterator it = statusList.iterator();
while (it.hasNext()) {
Status s = (Status) it.next();
buildStr(sb, "", s);
}
}
private static void buildStrFromStatusManager(StringBuilder sb, StatusManager sm) {
buildStrFromStatusList(sb, sm.getCopyOfStatusList());
}
private static void appendThrowable(StringBuilder sb, Throwable t) {
String[] stringRep = ThrowableToStringArray.convert(t);
for (String s : stringRep) {
if (s.startsWith(CoreConstants.CAUSED_BY)) {
// nothing
} else if (Character.isDigit(s.charAt(0))) {
// if line resembles "48 common frames omitted"
sb.append("\t... ");
} else {
// most of the time. just add a tab+"at"
sb.append("\tat ");
}
sb.append(s).append(CoreConstants.LINE_SEPARATOR);
}
}
public static void buildStr(StringBuilder sb, String indentation, Status s) {
String prefix;
if (s.hasChildren()) {
prefix = indentation + "+ ";
} else {
prefix = indentation + "|-";
}
if (simpleDateFormat != null) {
Date date = new Date(s.getDate());
String dateStr = simpleDateFormat.format(date);
sb.append(dateStr).append(" ");
}
sb.append(prefix).append(s).append(CoreConstants.LINE_SEPARATOR);
if (s.getThrowable() != null) {
appendThrowable(sb, s.getThrowable());
}
if (s.hasChildren()) {
Iterator<Status> ite = s.iterator();
while (ite.hasNext()) {
Status child = ite.next();
buildStr(sb, indentation + " ", child);
}
}
}
}