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// Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#include <datasrc/cache_config.h>
#include <datasrc/client.h>
#include <datasrc/memory/load_action.h>
#include <dns/name.h>
#include <cc/data.h>
#include <exceptions/exceptions.h>
#include <map>
#include <string>
using namespace isc::data;
namespace isc {
namespace datasrc {
namespace internal {
namespace {
bool
getEnabledFromConf(const Element& conf) {
return (conf.contains("cache-enable") &&
conf.get("cache-enable")->boolValue());
}
std::string
getSegmentTypeFromConf(const Element& conf) {
// If cache-zones is not explicitly configured, use the default type.
// (Ideally we should retrieve the default from the spec).
if (!conf.contains("cache-type")) {
return ("local");
}
return (conf.get("cache-type")->stringValue());
}
}
CacheConfig::CacheConfig(const std::string& datasrc_type,
const DataSourceClient* datasrc_client,
const Element& datasrc_conf,
bool allowed) :
enabled_(allowed && getEnabledFromConf(datasrc_conf)),
segment_type_(getSegmentTypeFromConf(datasrc_conf)),
datasrc_client_(datasrc_client)
{
ConstElementPtr params = datasrc_conf.get("params");
if (!params) {
params.reset(new NullElement());
}
if (datasrc_type == "MasterFiles") {
if (datasrc_client) {
isc_throw(isc::InvalidParameter,
"data source client is given for MasterFiles");
}
if (!enabled_) {
isc_throw(CacheConfigError,
"The cache must be enabled for the MasterFiles type");
}
typedef std::map<std::string, ConstElementPtr> ZoneToFile;
const ZoneToFile& zone_to_file = params->mapValue();
ZoneToFile::const_iterator const it_end = zone_to_file.end();
for (ZoneToFile::const_iterator it = zone_to_file.begin();
it != it_end;
++it)
{
zone_config_[dns::Name(it->first)] = it->second->stringValue();
}
} else {
if (!datasrc_client) {
isc_throw(isc::InvalidParameter,
"data source client is missing for data source type: "
<< datasrc_type);
}
if (!enabled_) {
return;
}
if (!datasrc_conf.contains("cache-zones")) {
isc_throw(isc::NotImplemented, "Auto-detection of zones "
"to cache is not yet implemented, supply "
"cache-zones parameter");
// TODO: Auto-detect list of all zones in the
// data source.
}
const ConstElementPtr zones = datasrc_conf.get("cache-zones");
for (size_t i = 0; i < zones->size(); ++i) {
const dns::Name zone_name(zones->get(i)->stringValue());
if (!zone_config_.insert(Zones::value_type(zone_name,
"")).second) {
isc_throw(InvalidParameter, "Duplicate cache zone: " <<
zone_name);
}
}
}
}
} // namespace internal
} // namespace datasrc
} // namespace isc
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