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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.
*/
/* $Rev$ $Date$ */
#ifndef tuscany_scribe_hpp
#define tuscany_scribe_hpp
/**
* Scribe logging functions.
*/
// Work around redundant defines in Scribe headers
#undef PACKAGE
#undef PACKAGE_BUGREPORT
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#undef VERSION
#undef OK
// Ignore integer conversion issues in Thrift and Scribe headers
#ifdef WANT_MAINTAINER_WARNINGS
#pragma GCC diagnostic ignored "-Wconversion"
#endif
#include <protocol/TBinaryProtocol.h>
#include <transport/TSocket.h>
#include <transport/TTransportUtils.h>
#include "gen-cpp/scribe.h"
#ifdef WANT_MAINTAINER_WARNINGS
#pragma GCC diagnostic warning "-Wconversion"
#endif
#include "string.hpp"
#include "list.hpp"
#include "value.hpp"
#include "monad.hpp"
#include "../../modules/scheme/eval.hpp"
namespace tuscany {
namespace scribe {
/**
* Represents a Scribe connection.
*/
class Scribe {
public:
Scribe() : owner(false) {
}
Scribe(const string host, const int port) : owner(true) {
debug(host, "scribe::scribe::host");
debug(port, "scribe::scribe::port");
init(host, port);
}
Scribe(const Scribe& c) : owner(false) {
debug("scribe::scribe::copy");
client = c.client;
transport = c.transport;
}
const Scribe& operator=(const Scribe& c) {
debug("scribe::scribe::operator=");
if(this == &c)
return *this;
owner = false;
client = c.client;
transport = c.transport;
return *this;
}
~Scribe() {
if (!owner)
return;
try {
transport->close();
delete client;
} catch (const std::exception& e) {
mkfailure<bool>(e.what());
}
}
private:
bool owner;
::scribe::thrift::scribeClient* client;
boost::shared_ptr<apache::thrift::transport::TTransport> transport;
friend const failable<bool> log(const value& val, const string& host, const value& category, const Scribe& sc);
friend const failable<string> status(const Scribe& sc);
/**
* Initialize the Scribe connection.
*/
const failable<bool> init(const string& host, const int port) {
try {
boost::shared_ptr<apache::thrift::transport::TTransport> sock(new apache::thrift::transport::TSocket(c_str(host), port));
boost::shared_ptr<apache::thrift::transport::TFramedTransport> framedSock(new apache::thrift::transport::TFramedTransport(sock));
transport = framedSock;
boost::shared_ptr<apache::thrift::protocol::TProtocol> proto(new apache::thrift::protocol::TBinaryProtocol(transport));
client = new ::scribe::thrift::scribeClient(proto);
transport->open();
return true;
} catch (const std::exception& e) {
return mkfailure<bool>(e.what());
}
}
};
/**
* Log an item.
*/
const failable<bool> log(const value& val, const string& host, const value& category, const Scribe& sc) {
debug(val, "scribe::log::value");
debug(category, "scribe::log::category");
const value cat = isString(category)? value(c_str(category)):category;
const string cs(scheme::writeValue(cat));
const string vs(scheme::writeValue(val));
ostringstream os;
os << "[" << host << "] " << vs;
try {
::scribe::thrift::LogEntry entry;
entry.category = c_str(cs);
entry.message = c_str(str(os));
std::vector< ::scribe::thrift::LogEntry> msgs;
msgs.push_back(entry);
int result = sc.client->Log(msgs);
if (result != ::scribe::thrift::OK)
return mkfailure<bool>("Could not log value, retry later");
} catch (const std::exception& e) {
return mkfailure<bool>(e.what());
}
debug(true, "scribe::log::result");
return true;
}
/**
* Return Scribe status.
*/
const failable<string> status(const Scribe& sc) {
debug("scribe::status");
try {
::facebook::fb303::fb_status s = sc.client->getStatus();
switch(s) {
case ::facebook::fb303::DEAD:
debug("DEAD", "scribe::status::result");
return string("DEAD");
case ::facebook::fb303::STARTING:
debug("STARTING", "scribe::status::result");
return string("STARTING");
case ::facebook::fb303::ALIVE:
debug("ALIVE", "scribe::status::result");
return string("ALIVE");
case ::facebook::fb303::STOPPING:
debug("STOPPING", "scribe::status::result");
return string("STOPPING");
case ::facebook::fb303::STOPPED:
debug("STOPPED", "scribe::status::result");
return string("STOPPED");
case ::facebook::fb303::WARNING:
debug("WARNING", "scribe::status::result");
return string("WARNING");
}
return mkfailure<string>("Unknown status");
} catch (const std::exception& e) {
return mkfailure<string>(e.what());
}
}
}
}
#endif /* tuscany_scribe_hpp */
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