79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* OnDemandStore.actor.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fdbserver/OnDemandStore.h"
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#include "flow/actorcompiler.h" // must be last include
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ACTOR static Future<Void> onErr(Future<Future<Void>> e) {
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Future<Void> f = wait(e);
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wait(f);
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return Void();
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}
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void OnDemandStore::open() {
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platform::createDirectory(folder);
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store = keyValueStoreMemory(joinPath(folder, prefix), myID, 500e6);
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err.send(store->getError());
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}
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OnDemandStore::OnDemandStore(std::string const& folder, UID myID, std::string const& prefix)
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: folder(folder), myID(myID), store(nullptr), prefix(prefix) {}
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OnDemandStore::~OnDemandStore() {
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close();
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}
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IKeyValueStore* OnDemandStore::get() {
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if (!store) {
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open();
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}
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return store;
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}
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bool OnDemandStore::exists() const {
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return store || fileExists(joinPath(folder, prefix + "0.fdq")) || fileExists(joinPath(folder, prefix + "1.fdq")) ||
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fileExists(joinPath(folder, prefix + ".fdb"));
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}
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IKeyValueStore* OnDemandStore::operator->() {
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return get();
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}
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Future<Void> OnDemandStore::getError() const {
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return onErr(err.getFuture());
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}
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Future<Void> OnDemandStore::onClosed() const {
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return store->onClosed();
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}
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void OnDemandStore::dispose() {
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if (store) {
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store->dispose();
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store = nullptr;
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}
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}
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void OnDemandStore::close() {
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if (store) {
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store->close();
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store = nullptr;
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}
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}
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