com.alibaba.nacos.common.utils.ExceptionUtil Maven / Gradle / Ivy
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.
*/
package com.alibaba.nacos.common.utils;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.Objects;
/**
* Common methods for exception.
*
* @author nkorange
* @since 1.2.0
*/
public class ExceptionUtil {
private ExceptionUtil() {
}
/**
* Represents an empty exception, that is, no exception occurs, only a constant.
*/
public static final Exception NONE_EXCEPTION = new RuntimeException("");
public static String getAllExceptionMsg(Throwable e) {
Throwable cause = e;
StringBuilder strBuilder = new StringBuilder();
while (cause != null && !StringUtils.isEmpty(cause.getMessage())) {
strBuilder.append("caused: ").append(cause.getMessage()).append(';');
cause = cause.getCause();
}
return strBuilder.toString();
}
public static Throwable getCause(final Throwable t) {
final Throwable cause = t.getCause();
if (Objects.isNull(cause)) {
return t;
}
return cause;
}
public static String getStackTrace(final Throwable t) {
if (t == null) {
return "";
}
final ByteArrayOutputStream out = new ByteArrayOutputStream();
final PrintStream ps = new PrintStream(out);
t.printStackTrace(ps);
ps.flush();
return out.toString();
}
}