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LogSupport.java
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package act.util;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import org.osgl.logging.LogManager;
import org.osgl.logging.Logger;
import org.osgl.util.S;
/**
* Provides logging support utility methods to extended classes.
*/
public class LogSupport {
public static final String DOUBLE_DASHED_LINE = S.times('=', 80);
public static final String DASHED_LINE = S.times('-', 80);
public static final String STAR_LINE = S.times('*', 80);
public static final String HASH_SYMBOL_LINE = S.times('#', 80);
public static final String TILD_LINE = S.times('~', 80);
protected final transient Logger logger;
public LogSupport() {
this(false);
}
/**
* Used by sub class that want to implement it's own logging logic.
*
* Typically for class that generates massive number of instances and
* want to avoid creating logger every time.
*
* @param noLogger if `false` then logger will not be generated
*/
protected LogSupport(boolean noLogger) {
logger = noLogger ? null : LogManager.get(getClass());
}
/**
* Print a line of 80 `=` chars
*/
protected void printDoubleDashedLine() {
info(DOUBLE_DASHED_LINE);
}
/**
* Print a line of 80 `-` chars
*/
protected void printDashedLine() {
info(DASHED_LINE);
}
/**
* Print a line of 80 `*` chars
*/
protected void printStarLine() {
info(STAR_LINE);
}
/**
* Print a line of 80 `#` chars
*/
protected void printHashSimbolLine() {
info(HASH_SYMBOL_LINE);
}
/**
* Print a line of 80 `~` chars
*/
protected void printTildLine() {
info(TILD_LINE);
}
/**
* Print a blank line
*/
protected void println() {
info("");
}
/**
* Print formatted string in the center of 80 chars line, left and right padded.
*
* @param format
* The string format pattern
* @param args
* The string format arguments
*/
protected void printCenter(String format, Object... args) {
String text = S.fmt(format, args);
info(S.center(text, 80));
}
/**
* Print the lead string followed by centered formatted string. The whole
* length of the line is 80 chars.
*
* Example:
*
* ```java
* printCenterWithLead(" *", "Hello %s", "World");
* ```
*
* will print something like
*
* ```
* * Hello World
* ```
*
* Note the above is just a demo, the exact number of whitespace might not be correct.
*
*
* @param lead
* the lead string
* @param format
* The string format pattern
* @param args
* The string format arguments
*/
protected void printCenterWithLead(String lead, String format, Object ... args) {
String text = S.fmt(format, args);
int len = 80 - lead.length();
info(S.concat(lead, S.center(text, len)));
}
protected void trace(String format, Object ... args) {
logger.trace(format, args);
}
protected boolean isTraceEnabled() {
return logger.isTraceEnabled();
}
protected void trace(Throwable t, String format, Object ... args) {
logger.trace(t, format, args);
}
protected boolean isDebugEnabled() {
return logger.isDebugEnabled();
}
protected void debug(String format, Object ... args) {
logger.debug(format, args);
}
protected void debug(Throwable t, String format, Object ... args) {
logger.debug(t, format, args);
}
protected void info(String format, Object ... args) {
logger.info(format, args);
}
protected void info(Throwable t, String format, Object ... args) {
logger.info(t, format, args);
}
protected void warn(String format, Object ... args) {
logger.warn(format, args);
}
protected void warn(Throwable t, String format, Object ... args) {
logger.warn(t, format, args);
}
protected void error(String format, Object ... args) {
logger.error(format, args);
}
protected void error(Throwable t, String format, Object ... args) {
logger.error(t, format, args);
}
protected void fatal(String format, Object ... args) {
logger.fatal(format, args);
}
public void fatal(Throwable t, String format, Object ... args) {
logger.fatal(t, format, args);
}
}