d_process.h

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// Copyright (C) 2013-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#ifndef D_PROCESS_H
#define D_PROCESS_H
 
#include <asiolink/io_service.h>
#include <cc/data.h>
#include <process/d_cfg_mgr.h>
 
#include <boost/shared_ptr.hpp>
 
#include <exceptions/exceptions.h>
 
#include <atomic>
 
namespace isc {
namespace process {
 
class DProcessBaseError : public isc::Exception {
public:
    DProcessBaseError(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { }
};
 
static const std::string VERSION_GET_COMMAND("version-get");
 
static const std::string BUILD_REPORT_COMMAND("build-report");
 
static const std::string CONFIG_GET_COMMAND("config-get");
 
static const std::string CONFIG_HASH_GET_COMMAND("config-hash-get");
 
static const std::string CONFIG_WRITE_COMMAND("config-write");
 
static const std::string CONFIG_TEST_COMMAND("config-test");
 
static const std::string CONFIG_RELOAD_COMMAND("config-reload");
 
static const std::string CONFIG_SET_COMMAND("config-set");
 
static const std::string SERVER_TAG_GET_COMMAND("server-tag-get");
 
static const std::string SHUT_DOWN_COMMAND("shutdown");
 
static const std::string STATUS_GET_COMMAND("status-get");
 
class DProcessBase {
public:
    DProcessBase(const char* app_name, asiolink::IOServicePtr io_service,
                 DCfgMgrBasePtr cfg_mgr)
        : app_name_(app_name), io_service_(io_service), shut_down_flag_(false),
        cfg_mgr_(cfg_mgr) {
        if (!io_service_) {
            isc_throw (DProcessBaseError, "IO Service cannot be null");
        }
 
        if (!cfg_mgr_) {
            isc_throw (DProcessBaseError, "CfgMgr cannot be null");
        }
    }
 
    virtual void init() = 0;
 
    virtual void run() = 0;
 
    virtual isc::data::ConstElementPtr
    shutdown(isc::data::ConstElementPtr args) = 0;
 
    virtual isc::data::ConstElementPtr
    configure(isc::data::ConstElementPtr config_set,
              bool check_only = false) = 0;
 
    virtual ~DProcessBase() {
        io_service_->stopAndPoll();
    }
 
    bool shouldShutdown() const {
        return (shut_down_flag_);
    }
 
    void setShutdownFlag(bool value) {
        shut_down_flag_ = value;
    }
 
    const std::string getAppName() const {
        return (app_name_);
    }
 
    asiolink::IOServicePtr& getIOService() {
        return (io_service_);
    }
 
    void stopIOService() {
        io_service_->stop();
    }
 
    DCfgMgrBasePtr& getCfgMgr() {
        return (cfg_mgr_);
    }
 
private:
    std::string app_name_;
 
    asiolink::IOServicePtr io_service_;
 
    std::atomic<bool> shut_down_flag_;
 
    DCfgMgrBasePtr cfg_mgr_;
};
 
typedef boost::shared_ptr<DProcessBase> DProcessBasePtr;
 
}  // namespace process
}  // namespace isc
 
#endif