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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.
*/
/* $Rev$ $Date$ */
/**
* Scribe-based logger component implementation, used to intercept
* and log service invocations.
*/
#include "string.hpp"
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
#include "monad.hpp"
#include "scribe.hpp"
namespace tuscany {
namespace logger {
/**
* Component implementation lambda function.
*/
class applyLog {
public:
applyLog(const lambda<value(const list<value>&)>& relay, const value& category, scribe::Scribe& sc) : relay(relay), category(category), sc(sc) {
}
const value operator()(const list<value>& params) const {
// Log the function params
debug(params, "logger::apply::params");
scribe::log(params, category, sc);
// Relay the function
const failable<value> res = relay(params);
// Log the result
scribe::log(res, category, sc);
return res;
}
private:
const lambda<value(const list<value>&)> relay;
const value category;
scribe::Scribe& sc;
};
/**
* Start the component.
*/
const failable<value> start(unused const list<value>& params) {
// Connect to Scribe
scribe::Scribe& sc = *(new (gc_new<scribe::Scribe>()) scribe::Scribe("localhost", 1464));
// Extract the configured relay service and category
const value rel = car(params);
const value category = ((lambda<value(list<value>)>)cadr(params))(list<value>());
debug(category, "logger::start::category");
// Return the component implementation lambda function
return value(lambda<value(const list<value>&)>(applyLog(rel, category, sc)));
}
}
}
extern "C" {
const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
const tuscany::value func(car(params));
if (func == "start")
return tuscany::logger::start(cdr(params));
return tuscany::mkfailure<tuscany::value>();
}
}
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