src/qpid/linearstore/StorePlugin.cpp

/*
 *
 * 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 "qpid/broker/Broker.h"
#include "qpid/Plugin.h"
#include "qpid/Options.h"
#include "qpid/DataDir.h"
#include "qpid/linearstore/JournalLogImpl.h"
#include "qpid/linearstore/MessageStoreImpl.h"
#include "qpid/log/Statement.h"

using qpid::linearstore::MessageStoreImpl;

namespace qpid {
namespace broker {

using namespace std;

struct StorePlugin : public Plugin {

    MessageStoreImpl::StoreOptions options;
    boost::shared_ptr<MessageStoreImpl> store;

    Options* getOptions() { return &options; }

    void earlyInitialize (Plugin::Target& target)
    {
        Broker* broker = dynamic_cast<Broker*>(&target);
        if (!broker) return;
        store.reset(new MessageStoreImpl(broker));
        const DataDir& dataDir = broker->getDataDir ();
        if (options.storeDir.empty ())
        {
            if (!dataDir.isEnabled ())
                throw Exception ("linearstore: If broker option --data-dir is blank or --no-data-dir is specified, linearstore option --store-dir must be present.");

            options.storeDir = dataDir.getPath ();
        } else {
            // Check if store dir is absolute. If not, make it absolute using qpidd executable dir as base
            if (options.storeDir.at(0) != '/') {
                char buf[1024];
                if (::getcwd(buf, sizeof(buf)-1) == 0) {
                    std::ostringstream oss;
                    oss << "linearstore: getcwd() unable to read current directory: errno=" << errno << " (" << strerror(errno) << ")";
                    throw Exception(oss.str());
                }
                std::string newStoreDir = std::string(buf) + "/" + options.storeDir;
                std::ostringstream oss;
                oss << "store-dir option \"" << options.storeDir << "\" is not absolute, changed to \"" << newStoreDir << "\"";
                QLS_LOG(warning, oss.str());
                options.storeDir = newStoreDir;
            }
        }
        store->init(&options);
        boost::shared_ptr<qpid::broker::MessageStore> brokerStore(store);
        broker->setStore(brokerStore);
        target.addFinalizer(boost::bind(&StorePlugin::finalize, this));
    }

    void initialize(Plugin::Target& target)
    {
        Broker* broker = dynamic_cast<Broker*>(&target);
        if (!broker) return;
        if (!store) return;
        QLS_LOG(info, "Enabling management instrumentation.");
        store->initManagement();
    }

    void finalize()
    {
        store.reset();
    }

    const char* id() {return "StorePlugin";}
};

static StorePlugin instance; // Static initialization.

}} // namespace qpid::broker