/*
 *
 * 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 "Quorum.h"
#include "qpid/log/Statement.h"
#include "qpid/Options.h"
#include "qpid/sys/Time.h"

namespace qpid {
namespace cluster {

Quorum::Quorum() : enable(false), cman(0) {}

Quorum::~Quorum() { if (cman) cman_finish(cman); }

void Quorum::addOption(Options& opts) {
    opts.addOptions()("cluster-cman", optValue(enable), "Enable integration with CMAN Cluster Manager");
}

void Quorum::init() {
    if (enable) {
        cman = cman_init(0);
        if (cman == 0) throw ErrnoException("Can't connect to cman service");
        // FIXME aconway 2008-11-13: configure max wait.
        for (int retry = 0;  !cman_is_quorate(cman) && retry < 30; retry++) {
            QPID_LOG(notice, "Waiting for cluster quorum: " << sys::strError(errno));
            sys::sleep(1);
        }
        if (!cman_is_quorate(cman))
            throw ErrnoException("Timed out waiting for cluster quorum");
    }
}

bool Quorum::isQuorate() { return cman_is_quorate(cman); }

}} // namespace qpid::cluster