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Logging.java
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Logging.java
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// Logging.java
package io.airbrake.utility;
import java.sql.Timestamp;
import java.util.Arrays;
import org.apache.commons.lang3.ClassUtils;
import org.apache.commons.lang3.builder.*;
/**
* Houses all logging methods for various debug outputs.
*/
public class Logging {
private static final char separatorCharacterDefault = '-';
private static final String separatorInsertDefault = "";
private static final int separatorLengthDefault = 40;
/**
* Get a String of passed char of passed length size.
* @param character Character to repeat.
* @param length Length of string.
* @return Created string.
*/
private static String getRepeatedCharString(char character, int length) {
// Create new character array of proper length.
char[] characters = new char[length];
// Fill each array element with character.
Arrays.fill(characters, character);
// Return generated string.
return new String(characters);
}
/**
* Outputs any kind of Object.
* Uses ReflectionToStringBuilder from Apache commons-lang library.
*
* @param value Object to be output.
*/
public static void log(Object value)
{
if (value == null) return;
// If primitive or wrapper object, directly output.
if (ClassUtils.isPrimitiveOrWrapper(value.getClass()))
{
System.out.println(value);
}
else
{
// For complex objects, use reflection builder output.
System.out.println(new ReflectionToStringBuilder(value, ToStringStyle.MULTI_LINE_STYLE).toString());
}
}
/**
* Outputs any kind of String.
*
* @param value String to be output.
*/
public static void log(String value)
{
if (value == null) return;
System.out.println(value);
}
/**
* Outputs any kind of String, with prefixed timestamp.
*
* @param value String to be output.
* @param includeTimestamp Indicates if timestamp should be included.
*/
public static void log(String value, boolean includeTimestamp)
{
if (value == null) return;
if (includeTimestamp) {
System.out.println(String.format("[%s] %s", new Timestamp(System.currentTimeMillis()), value));
} else {
log(value);
}
}
/**
* Outputs passed in Throwable exception or error instance.
* Can be overloaded if expected parameter should be specified.
*
* @param throwable Throwable instance to output.
*/
public static void log(Throwable throwable)
{
// Invoke call with default expected value.
log(throwable, true);
}
/**
* Outputs passed in Throwable exception or error instance.
* Includes Throwable class type, message, stack trace, and expectation status.
*
* @param throwable Throwable instance to output.
* @param expected Determines if this Throwable was expected or not.
*/
public static void log(Throwable throwable, boolean expected)
{
System.out.println(String.format("[%s] %s", expected ? "EXPECTED" : "UNEXPECTED", throwable.toString()));
throwable.printStackTrace();
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator() {
lineSeparator(separatorInsertDefault, separatorLengthDefault, separatorCharacterDefault);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(String insert) {
lineSeparator(insert, separatorLengthDefault, separatorCharacterDefault);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(int length) {
lineSeparator(separatorInsertDefault, length, separatorCharacterDefault);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(int length, char separator) {
lineSeparator(separatorInsertDefault, length, separator);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(char separator) {
lineSeparator(separatorInsertDefault, separatorLengthDefault, separator);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(String insert, int length) {
lineSeparator(insert, length, separatorCharacterDefault);
}
/**
* See: lineSeparator(String, int, char)
*/
public static void lineSeparator(String insert, char separator) {
lineSeparator(insert, separatorLengthDefault, separator);
}
/**
* Outputs a dashed line separator with
* inserted text centered in the middle.
*
* @param insert Inserted text to be centered.
* @param length Length of line to be output.
* @param separator Separator character.
*/
public static void lineSeparator(String insert, int length, char separator)
{
// Default output to insert.
String output = insert;
if (insert.length() == 0) {
output = getRepeatedCharString(separator, length);
} else if (insert.length() < length) {
// Update length based on insert length, less a space for margin.
length -= (insert.length() + 2);
// Halve the length and floor left side.
int left = (int) Math.floor(length / 2);
int right = left;
// If odd number, add dropped remainder to right side.
if (length % 2 != 0) right += 1;
// Surround insert with separators.
output = String.format("%s %s %s", getRepeatedCharString(separator, left), insert, getRepeatedCharString(separator, right));
}
System.out.println(output);
}
}