cpp/lib/common/CommonOptions.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 "CommonOptions.h"
#include <algorithm>

namespace qpid {

namespace program_options {

static const std::string prefix("QPID_");

static char env2optchar(char env) { return (env=='_') ? '-' : tolower(env); }

std::string EnvMapper::operator()(const std::string& env) {
    if (env.substr(0, prefix.size()) == prefix) {
        std::string opt = env.substr(prefix.size());
        transform(opt.begin(), opt.end(), opt.begin(), env2optchar);
        // Ignore env vars that don't match to known options.
        if (opts.find_nothrow(opt, false))
            return opt;
    }
    return std::string();
}

} // namespace program_options

const int CommonOptions::DEFAULT_PORT=5672;

CommonOptions::CommonOptions() : trace(false), port(DEFAULT_PORT) {}

void CommonOptions::addTo(po::options_description& desc)
{
    using namespace po;
    desc.add_options()
        ("trace,t", optValue(trace), "Enable debug tracing" )
        ("port,p", optValue(port,"PORT"), "Use PORT for AMQP connections.");
}

} // namespace qpid