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/*
*
* 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/amqp/Filter.h"
#include "qpid/broker/amqp/DataReader.h"
#include "qpid/broker/DirectExchange.h"
#include "qpid/broker/TopicExchange.h"
#include "qpid/amqp/descriptors.h"
#include "qpid/log/Statement.h"
extern "C" {
#include <proton/engine.h>
}
namespace qpid {
namespace broker {
namespace amqp {
void Filter::read(pn_data_t* data)
{
try {
DataReader reader(*this);
reader.read(data);
} catch (const std::exception& e) {
QPID_LOG(warning, "Error parsing filter: " << e.what());
}
}
void Filter::write(pn_data_t* data)
{
pn_data_put_map(data);
pn_data_enter(data);
subjectFilter.write(data);
pn_data_exit(data);
}
void Filter::onStringValue(const qpid::amqp::CharSequence& key, const qpid::amqp::CharSequence& value, const qpid::amqp::Descriptor* descriptor)
{
StringFilter filter;
filter.key = std::string(key.data, key.size);
filter.value = std::string(value.data, value.size);
if (descriptor) {
filter.described = true;
filter.descriptor = *descriptor;
if (descriptor->match(qpid::amqp::filters::LEGACY_TOPIC_FILTER_SYMBOL, qpid::amqp::filters::LEGACY_TOPIC_FILTER_CODE)
|| descriptor->match(qpid::amqp::filters::LEGACY_DIRECT_FILTER_SYMBOL, qpid::amqp::filters::LEGACY_DIRECT_FILTER_CODE)) {
setSubjectFilter(filter);
} else {
QPID_LOG(notice, "Skipping unrecognised string filter with key " << filter.key << " and descriptor " << filter.descriptor);
}
} else {
setSubjectFilter(filter);
}
}
bool Filter::hasSubjectFilter() const
{
return !subjectFilter.value.empty();
}
std::string Filter::getSubjectFilter() const
{
return subjectFilter.value;
}
void Filter::setSubjectFilter(const StringFilter& filter)
{
if (hasSubjectFilter()) {
QPID_LOG(notice, "Skipping filter with key " << filter.key << "; subject filter already set");
} else {
subjectFilter = filter;
}
}
void Filter::bind(boost::shared_ptr<Exchange> exchange, boost::shared_ptr<Queue> queue)
{
subjectFilter.bind(exchange, queue);
}
Filter::StringFilter::StringFilter() : described(false), descriptor(0) {}
namespace {
pn_bytes_t convert(const std::string& in)
{
pn_bytes_t out;
out.start = const_cast<char*>(in.data());
out.size = in.size();
return out;
}
pn_bytes_t convert(const qpid::amqp::CharSequence& in)
{
pn_bytes_t out;
out.start = const_cast<char*>(in.data);
out.size = in.size;
return out;
}
}
void Filter::StringFilter::write(pn_data_t* data)
{
pn_data_put_symbol(data, convert(key));
if (described) {
pn_data_put_described(data);
pn_data_enter(data);
switch (descriptor.type) {
case qpid::amqp::Descriptor::NUMERIC:
pn_data_put_ulong(data, descriptor.value.code);
break;
case qpid::amqp::Descriptor::SYMBOLIC:
pn_data_put_symbol(data, convert(descriptor.value.symbol));
break;
}
}
pn_data_put_string(data, convert(value));
if (described) pn_data_exit(data);
}
void Filter::StringFilter::bind(boost::shared_ptr<Exchange> exchange, boost::shared_ptr<Queue> queue)
{
if (described && exchange->getType() == DirectExchange::typeName
&& descriptor.match(qpid::amqp::filters::LEGACY_TOPIC_FILTER_SYMBOL, qpid::amqp::filters::LEGACY_TOPIC_FILTER_CODE)) {
QPID_LOG(info, "Using legacy topic filter as a direct matching filter for " << exchange->getName());
if (descriptor.type == qpid::amqp::Descriptor::NUMERIC) {
descriptor = qpid::amqp::Descriptor(qpid::amqp::filters::LEGACY_DIRECT_FILTER_CODE);
} else {
qpid::amqp::CharSequence symbol;
symbol.data = qpid::amqp::filters::LEGACY_DIRECT_FILTER_SYMBOL.data();
symbol.size = qpid::amqp::filters::LEGACY_DIRECT_FILTER_SYMBOL.size();
descriptor = qpid::amqp::Descriptor(symbol);
}
}
exchange->bind(queue, value, 0);
}
}}} // namespace qpid::broker::amqp
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