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/*
* 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.
*/
/**
* \file RunState.cpp
*/
#include "qpid/asyncStore/RunState.h"
#include "qpid/Exception.h"
#include <sstream>
namespace qpid {
namespace asyncStore {
RunState::RunState() :
qpid::asyncStore::jrnl2::State<RunState_t>()
{}
RunState::RunState(const RunState_t s) :
qpid::asyncStore::jrnl2::State<RunState_t>(s)
{}
RunState::RunState(const RunState& s) :
qpid::asyncStore::jrnl2::State<RunState_t>(s)
{}
RunState::~RunState() {}
void
RunState::setInitializing() {
set(RS_INITIALIZING);
}
void
RunState::setRestoring() {
set(RS_RESTORING);
}
void
RunState::setRunning() {
set(RS_RUNNING);
}
void
RunState::setStopping() {
set(RS_STOPPING);
}
void
RunState::setStopped() {
set(RS_STOPPED);
}
const char*
RunState::getAsStr() const {
return s_toStr(m_state);
}
//static
const char*
RunState::s_toStr(const RunState_t s) {
switch (s) {
case RS_NONE:
return "WR_NONE";
case RS_INITIALIZING:
return "RS_INITIALIZING";
case RS_RESTORING:
return "RS_RESTORING";
case RS_RUNNING:
return "RS_RUNNING";
case RS_STOPPING:
return "RS_STOPPING";
case RS_STOPPED:
return "RS_STOPPED";
default:
std::ostringstream oss;
oss << "<unknown state (" << "s" << ")>";
return oss.str().c_str();
}
}
// private
void
RunState::set(const RunState_t s) {
// State transition logic: set stateError to true if an invalid transition is attempted
bool stateTransitionError = false;
switch (m_state) {
case RS_NONE:
if (s != RS_INITIALIZING && s != RS_RESTORING) {
stateTransitionError = true;
}
break;
case RS_INITIALIZING:
case RS_RESTORING:
if (s != RS_RUNNING) {
stateTransitionError = true;
}
break;
case RS_RUNNING:
if (s != RS_STOPPING) {
stateTransitionError = true;
}
break;
case RS_STOPPING:
if (s != RS_STOPPED) {
stateTransitionError = true;
}
break;
case RS_STOPPED: // Cannot move out of this state except with reset()
stateTransitionError = true;
break;
}
if (stateTransitionError) {
std::ostringstream oss;
oss << "RunState::set() is in state " << m_state << " and cannot be moved to state " << s << ".";
throw qpid::Exception(oss.str());
}
m_state = s;
}
}} // namespace qpid::asyncStore
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