exception.cc
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:4k
- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you 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.
- */
- #include "exception.hh"
- #ifdef USE_EXECINFO
- #include <execinfo.h>
- #endif
- #include <errno.h>
- #include <sstream>
- #include <typeinfo>
- using std::string;
- namespace hadoop {
- /**
- * Create an exception.
- * @param message The message to give to the user.
- * @param reason The exception that caused the new exception.
- */
- Exception::Exception(const string& message,
- const string& component,
- const string& location,
- const Exception* reason
- ): mMessage(message),
- mComponent(component),
- mLocation(location),
- mReason(reason)
-
- {
- #ifdef USE_EXECINFO
- mCalls = backtrace(mCallStack, sMaxCallStackDepth);
- #else
- mCalls = 0;
- #endif
- }
- /**
- * Copy the exception.
- * Clones the reason, if there is one.
- */
- Exception::Exception(const Exception& other
- ): mMessage(other.mMessage),
- mComponent(other.mComponent),
- mLocation(other.mLocation),
- mCalls(other.mCalls)
- {
- for(int i=0; i < mCalls; ++i) {
- mCallStack[i] = other.mCallStack[i];
- }
- if (other.mReason) {
- mReason = other.mReason->clone();
- } else {
- mReason = NULL;
- }
- }
- Exception::~Exception() throw () {
- delete mReason;
- }
- /**
- * Print all of the information about the exception.
- */
- void Exception::print(std::ostream& stream) const {
- stream << "Exception " << getTypename();
- if (mComponent.size() != 0) {
- stream << " (" << mComponent << ")";
- }
- stream << ": " << mMessage << "n";
- if (mLocation.size() != 0) {
- stream << " thrown at " << mLocation << "n";
- }
- #ifdef USE_EXECINFO
- printCallStack(stream);
- #endif
- if (mReason) {
- stream << "caused by: ";
- mReason->print(stream);
- }
- stream.flush();
- }
- /**
- * Result of print() as a string.
- */
- string Exception::toString() const {
- std::ostringstream stream;
- print(stream);
- return stream.str();
- }
- #ifdef USE_EXECINFO
- /**
- * Print the call stack where the exception was created.
- */
- void Exception::printCallStack(std::ostream& stream) const {
- char ** symbols = backtrace_symbols(mCallStack, mCalls);
- for(int i=0; i < mCalls; ++i) {
- stream << " ";
- if (i == 0) {
- stream << "at ";
- } else {
- stream << "from ";
- }
- stream << symbols[i] << "n";
- }
- free(symbols);
- }
- #endif
- const char* Exception::getTypename() const {
- return "Exception";
- }
- Exception* Exception::clone() const {
- return new Exception(*this);
- }
- IOException::IOException(const string& message,
- const string& component,
- const string& location,
- const Exception* reason
- ): Exception(message, component, location, reason)
- {
- }
- const char* IOException::getTypename() const {
- return "IOException";
- }
- IOException* IOException::clone() const {
- return new IOException(*this);
- }
- }