package com.java110.utils.exception;
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import com.java110.utils.util.StringUtil;
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import org.springframework.util.ObjectUtils;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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/**
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* Created by wuxw on 2018/4/14.
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*/
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public class ExceptionUtils {
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public static Throwable resolveActualException(Throwable t)
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{
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Throwable cause = t;
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while (cause != null) {
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if (ObjectUtils.nullSafeClassName(cause).startsWith("com.java110.")) {
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return cause;
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}
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cause = cause.getCause();
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}
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return cause;
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}
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public static void rethrowException(Throwable t) {
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if ((t instanceof RuntimeException)) {
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throw ((RuntimeException)t);
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}
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throw new RuntimeException(t);
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}
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public static String populateExecption(Throwable t)
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{
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return populateExecption(t, 2000);
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}
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public static String populateExecption(Throwable t, int descLimit) {
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if (t != null) {
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String message = "";
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StringWriter writer = null;
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PrintWriter pw = null;
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try{
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writer = new StringWriter();
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pw = new PrintWriter(writer);
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t.printStackTrace(pw);
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message = writer.toString();
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} finally {
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if(pw != null) {
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pw.close();
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}
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if(writer != null) {
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try {
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writer.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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return StringUtil.truncateMessage(message, descLimit);
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}
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return null;
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}
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/**
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* 创建异常堆栈信息
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* @param message
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* @param cause
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* @return
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*/
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public static String buildMessage(String message, Throwable cause) {
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if (cause != null) {
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StringBuilder buf = new StringBuilder();
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if (message != null) {
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buf.append(message).append("; ");
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}
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buf.append("nested exception is ").append(cause);
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return buf.toString();
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}
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else {
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return message;
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}
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}
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}
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