ErrorListener.h

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/*
* Copyright Onix Solutions Limited [OnixS]. All rights reserved.
*
* This software owned by Onix Solutions Limited [OnixS] and is protected by copyright law
* and international copyright treaties.
*
* Access to and use of the software is governed by the terms of the applicable ONIXS Software
* Services Agreement (the Agreement) and Customer end user license agreements granting
* a non-assignable, non-transferable and non-exclusive license to use the software
* for it's own data processing purposes under the terms defined in the Agreement.
*
* Except as otherwise granted within the terms of the Agreement, copying or reproduction of any part
* of this source code or associated reference material to any other location for further reproduction
* or redistribution, and any amendments to this copyright notice, are expressly prohibited.
*
* Any reproduction or redistribution for sale or hiring of the Software not in accordance with
* the terms of the Agreement is a violation of copyright law.
*/

#pragma once

#include <string>

#include <OnixS/SgxTitan/Trading/OUCH/ABI.h>
#include <OnixS/SgxTitan/Trading/OUCH/Bootstrap.h>

ONIXS_SGXTITAN_OUCH_NAMESPACE_BEGIN

/// Known (selected) error codes.
struct ONIXS_SGXTITAN_OUCH_API ErrorCode
{
    /// @copydoc ErrorCode
    enum Enum
    {
        General = 1, ///< Identifies errors of generic nature.
    };
};

/// Returns string representation of ErrorCode value.
ONIXS_SGXTITAN_OUCH_API std::string enumToString (ErrorCode::Enum);

/// Defines an interface through which the Handler notifies subscribers
/// about errors occurred while processing messages.
class ErrorListener
{
public:
    /// Implement this member to get notified about errors.
    /// @param code identifies error occurred while processing messages.
    /// @param description supplies notes on occurred error.
    /// @note Usually, Handler is capable to recover from errors by itself.
    /// That means, there's no need to restart manually.
    /// Instead, Handler will perform all necessary recovering by itself.
    virtual void onError (ErrorCode::Enum code, const std::string& description) = 0;

protected:
    /// Class provides an interface for handling errors in subscriptions.
    /// It doesn't provide an interface for instance deletion. However,
    /// since C++ doesn't have pure interface concept, destructor will be
    /// generated anyway. We can only control proper use of it. For this
    /// reason we hide from public use and make it available for descendants.
    virtual ~ErrorListener() {}
};

ONIXS_SGXTITAN_OUCH_NAMESPACE_END