com.pamirs.pradar.PradarCoreUtils Maven / Gradle / Ivy
package com.pamirs.pradar;
import org.apache.commons.lang.StringUtils;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.CRC32;
import static com.pamirs.pradar.AppNameUtils.appName;
public final class PradarCoreUtils {
public static final String EMPTY_STRING = "";
public static String DEFAULT_STRING = "default";
public static final String NEWLINE = "\r\n";
public static final String[] EMPTY_STRING_ARRAY = new String[0];
private static final String LOCAL_IP_ADDRESS = getLocalInetAddress();
private static final long LOCAL_IP_ADDRESS_NUMBER = getLocalInetAddressNumber();
private static final String LOCAL_HOST_NAME = getLocalHostName();
private static String getAppName() {
return appName();
}
/**
* 处理特殊字符使可以安全的记录日志
*
* @param value 字符串
* @return 返回保证安全的字符串
*/
public static String makeLogSafe(String value) {
value = StringUtils.replace(value, PradarCoreUtils.NEWLINE, "\t");
value = StringUtils.replace(value, "\n", "\t");
value = StringUtils.replace(value, "|", "\\");
return value;
}
public static boolean isBlank(String str) {
int strLen;
if (str == null || (strLen = str.length()) == 0) {
return true;
}
for (int i = 0; i < strLen; i++) {
if ((Character.isWhitespace(str.charAt(i)) == false)) {
return false;
}
}
return true;
}
public static String checkNotNullEmpty(String value, String name) throws IllegalArgumentException {
if (isBlank(value)) {
throw new IllegalArgumentException(name + " is null or empty");
}
return value;
}
public static T checkNotNull(T value, String name) throws IllegalArgumentException {
if (value == null) {
throw new IllegalArgumentException(name + " is null");
}
return value;
}
public static T defaultIfNull(T value, T defaultValue) {
return (value == null) ? defaultValue : value;
}
public static boolean isNotBlank(String str) {
return !isBlank(str);
}
public static String trim(String str) {
return str == null ? null : str.trim();
}
public static String[] split(String str, char separatorChar) {
return splitWorker(str, separatorChar, false);
}
private static String[] splitWorker(String str, char separatorChar, boolean preserveAllTokens) {
if (str == null) {
return null;
}
int len = str.length();
if (len == 0) {
return EMPTY_STRING_ARRAY;
}
List list = new ArrayList();
int i = 0, start = 0;
boolean match = false;
boolean lastMatch = false;
while (i < len) {
if (str.charAt(i) == separatorChar) {
if (match || preserveAllTokens) {
list.add(str.substring(start, i));
match = false;
lastMatch = true;
}
start = ++i;
continue;
}
lastMatch = false;
match = true;
i++;
}
if (match || (preserveAllTokens && lastMatch)) {
list.add(str.substring(start, i));
}
return (String[]) list.toArray(new String[list.size()]);
}
public static StringBuilder appendWithBlankCheck(String str, String defaultValue, StringBuilder appender) {
if (isNotBlank(str)) {
appender.append(str);
} else {
appender.append(defaultValue);
}
return appender;
}
public static StringBuilder appendWithNullCheck(Object obj, String defaultValue, StringBuilder appender) {
if (obj != null) {
appender.append(obj.toString());
} else {
appender.append(defaultValue);
}
return appender;
}
/**
* 追加日志，同时过滤字符串中的换行为空格，避免导致日志格式解析错误
*
* @param str 需要追加的字符串
* @param appender 用于追加的appender
* @param delimiter 分隔符
* @return 返回追加后的StringBuilder
*/
public static StringBuilder appendLog(String str, StringBuilder appender, char delimiter) {
if (str != null) {
int len = str.length();
appender.ensureCapacity(appender.length() + len);
for (int i = 0; i < len; i++) {
char c = str.charAt(i);
if (c == '\n' || c == '\r' || c == delimiter) {
// 用 appender.append(str, start, len) 批量 append 实质也是一个字符一个字符拷贝
// 因此此处还是用土办法
c = ' ';
}
appender.append(c);
}
}
return appender;
}
/**
* 过滤字符串中的换行为空格，避免导致日志格式解析错误
*
* @param str str
* @return 返回过滤后的结果
* @see #appendLog(String, StringBuilder, char)
*/
public static String filterInvalidCharacters(String str) {
StringBuilder appender = new StringBuilder(str.length());
return appendLog(str, appender, '|').toString();
}
/**
* 对字符串生成摘要，目前使用 CRC32 算法
*
* @param str str
* @return 摘要后的字符串
*/
public static String digest(String str) {
CRC32 crc = new CRC32();
crc.update(str.getBytes());
return Long.toHexString(crc.getValue());
}
// 自身日志的时间标签格式化器
private static final ThreadLocal dateFmt = new ThreadLocal() {
@Override
protected FastDateFormat initialValue() {
return new FastDateFormat();
}
};
/**
* 时间格式化成 yyyy-MM-dd HH:mm:ss.SSS
*
* @param timestamp 时间戳
* @return 返回format后的时间
*/
public static String formatTime(long timestamp) {
return dateFmt.get().format(timestamp);
}
private static long getLocalInetAddressNumber() {
String ip = getLocalInetAddress();
StringBuilder builder = new StringBuilder();
String[] arr = StringUtils.split(ip, '.');
for (String str : arr) {
for (int i = str.length(); i < 3; i++) {
builder.append('0');
}
builder.append(str);
}
return Long.valueOf(builder.toString());
}
public static String getIpFromLong(long number) {
String str = String.valueOf(number);
int idx1 = 3 - (12 - str.length());
int idx2 = idx1 + 3;
int idx3 = idx2 + 3;
int idx4 = idx3 + 3;
StringBuilder builder = new StringBuilder();
builder.append(Integer.valueOf(str.substring(0, idx1))).append('.')
.append(Integer.valueOf(str.substring(idx1, idx2))).append('.')
.append(Integer.valueOf(str.substring(idx2, idx3))).append('.')
.append(Integer.valueOf(str.substring(idx3, idx4)));
return builder.toString();
}
private static String getLocalInetAddress() {
try {
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
InetAddress address = null;
while (interfaces.hasMoreElements()) {
NetworkInterface ni = interfaces.nextElement();
Enumeration addresses = ni.getInetAddresses();
while (addresses.hasMoreElements()) {
address = addresses.nextElement();
if (!address.isLoopbackAddress() && address.getHostAddress().indexOf(":") == -1) {
return address.getHostAddress();
}
}
}
} catch (Throwable t) {
}
return "127.0.0.1";
}
private static String getLocalHostName() {
try {
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
InetAddress address = null;
while (interfaces.hasMoreElements()) {
NetworkInterface ni = interfaces.nextElement();
Enumeration addresses = ni.getInetAddresses();
while (addresses.hasMoreElements()) {
address = addresses.nextElement();
if (!address.isLoopbackAddress() && address.getHostAddress().indexOf(":") == -1) {
return address.getHostName();
}
}
}
} catch (Throwable t) {
}
return "localhost";
}
public static String getLocalAddress() {
return LOCAL_IP_ADDRESS;
}
public static long getLocalAddressNumber() {
return LOCAL_IP_ADDRESS_NUMBER;
}
public static String getHostName() {
return LOCAL_HOST_NAME;
}
public static boolean isClusterTestEnabled(InvokeContext ctx) {
return ctx != null && "1".equals(ctx.getUserData("t"));
}
}
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