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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "dummystoragelink.h"
#include <vespa/storageframework/defaultimplementation/clock/realclock.h>
#include <vespa/vespalib/util/exceptions.h>
#include <cassert>
namespace storage {
DummyStorageLink* DummyStorageLink::_last(nullptr);
DummyStorageLink::DummyStorageLink()
: StorageLink("Dummy storage link"),
_commands(),
_replies(),
_injected(),
_autoReply(false),
_useDispatch(false),
_ignore(false),
_waitMonitor()
{
_last = this;
}
DummyStorageLink::~DummyStorageLink()
{
// Often a chain with dummy link on top is deleted in unit tests.
// If they haven't been closed already, close them for a cleaner
// shutdown
if (getState() == OPENED) {
close();
flush();
}
closeNextLink();
reset();
}
bool
DummyStorageLink::handleInjectedReply()
{
std::lock_guard guard(_lock);
if (!_injected.empty()) {
sendUp(*_injected.begin());
_injected.pop_front();
return true;
}
return false;
}
bool DummyStorageLink::onDown(const api::StorageMessage::SP& cmd)
{
if (_ignore) {
return false;
}
bool injected = handleInjectedReply();
if (!injected && _autoReply) {
if (!cmd->getType().isReply()) {
std::shared_ptr<api::StorageReply> reply(
std::dynamic_pointer_cast<api::StorageCommand>(cmd)
->makeReply().release());
reply->setResult(api::ReturnCode(
api::ReturnCode::OK, "Automatically generated reply"));
sendUp(reply);
}
}
if (isBottom()) {
std::lock_guard lock(_waitMonitor);
{
std::lock_guard guard(_lock);
_commands.push_back(cmd);
}
_waitCond.notify_all();
return true;
}
return StorageLink::onDown(cmd);
}
bool DummyStorageLink::onUp(const api::StorageMessage::SP& reply) {
if (isTop()) {
std::lock_guard lock(_waitMonitor);
{
std::lock_guard guard(_lock);
_replies.push_back(reply);
}
_waitCond.notify_all();
return true;
}
return StorageLink::onUp(reply);
}
void DummyStorageLink::injectReply(api::StorageReply* reply)
{
assert(reply);
std::lock_guard guard(_lock);
_injected.push_back(std::shared_ptr<api::StorageReply>(reply));
}
void DummyStorageLink::reset() {
std::lock_guard lock(_waitMonitor);
std::lock_guard guard(_lock);
_commands.clear();
_replies.clear();
_injected.clear();
}
void DummyStorageLink::waitForMessages(unsigned int msgCount, int timeout)
{
framework::defaultimplementation::RealClock clock;
vespalib::steady_time endTime = clock.getMonotonicTime() + vespalib::from_s(timeout);
std::unique_lock guard(_waitMonitor);
while (_commands.size() + _replies.size() < msgCount) {
if (timeout != 0 && clock.getMonotonicTime() > endTime) {
std::ostringstream ost;
ost << "Timed out waiting for " << msgCount << " messages to "
<< "arrive in dummy storage link. Only "
<< (_commands.size() + _replies.size()) << " messages seen "
<< "after timout of " << timeout << " seconds was reached.";
throw vespalib::IllegalStateException(ost.str(), VESPA_STRLOC);
}
if (timeout >= 0) {
_waitCond.wait_until(guard, endTime);
} else {
_waitCond.wait(guard);
}
}
}
void DummyStorageLink::waitForMessage(const api::MessageType& type, int timeout)
{
framework::defaultimplementation::RealClock clock;
vespalib::steady_time endTime = clock.getMonotonicTime() + vespalib::from_s(timeout);
std::unique_lock lock(_waitMonitor);
while (true) {
for (uint32_t i=0; i<_commands.size(); ++i) {
if (_commands[i]->getType() == type) return;
}
for (uint32_t i=0; i<_replies.size(); ++i) {
if (_replies[i]->getType() == type) return;
}
if (timeout != 0 && clock.getMonotonicTime() > endTime) {
std::ostringstream ost;
ost << "Timed out waiting for " << type << " message to "
<< "arrive in dummy storage link. Only "
<< (_commands.size() + _replies.size()) << " messages seen "
<< "after timout of " << timeout << " seconds was reached.";
if (_commands.size() == 1) {
ost << " Found command of type " << _commands[0]->getType();
}
if (_replies.size() == 1) {
ost << " Found command of type " << _replies[0]->getType();
}
throw vespalib::IllegalStateException(ost.str(), VESPA_STRLOC);
}
if (timeout >= 0) {
_waitCond.wait_until(lock, endTime);
} else {
_waitCond.wait(lock);
}
}
}
api::StorageMessage::SP
DummyStorageLink::getAndRemoveMessage(const api::MessageType& type)
{
std::lock_guard lock(_waitMonitor);
for (std::vector<api::StorageMessage::SP>::iterator it = _commands.begin();
it != _commands.end(); ++it)
{
if ((*it)->getType() == type) {
api::StorageMessage::SP result(*it);
_commands.erase(it);
return result;
}
}
for (std::vector<api::StorageMessage::SP>::iterator it = _replies.begin();
it != _replies.end(); ++it)
{
if ((*it)->getType() == type) {
api::StorageMessage::SP result(*it);
_replies.erase(it);
return result;
}
}
std::ostringstream ost;
ost << "No message of type " << type << " found.";
throw vespalib::IllegalStateException(ost.str(), VESPA_STRLOC);
}
} // storage
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