PeerPoolMgr.h

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/*
 * Copyright (C) 1996-2019 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

#ifndef SQUID_PEERPOOLMGR_H
#define SQUID_PEERPOOLMGR_H

#include "base/AsyncJob.h"
#include "comm/forward.h"
#include "security/forward.h"

class HttpRequest;
class CachePeer;
class CommConnectCbParams;

class PeerPoolMgr: public AsyncJob
{
    CBDATA_CLASS(PeerPoolMgr);

public:
    typedef CbcPointer<PeerPoolMgr> Pointer;

    // syncs mgr state whenever connection-related peer or pool state changes
    static void Checkpoint(const Pointer &mgr, const char *reason);

    explicit PeerPoolMgr(CachePeer *aPeer);
    virtual ~PeerPoolMgr();

protected:
    /* AsyncJob API */
    virtual void start();
    virtual void swanSong();
    virtual bool doneAll() const;

    bool validPeer() const;

    void checkpoint(const char *reason);
    void openNewConnection();
    void closeOldConnections(const int howMany);

    void handleOpenedConnection(const CommConnectCbParams &params);

    void handleSecuredPeer(Security::EncryptorAnswer &answer);

    void handleSecureClosure(const CommCloseCbParams &params);

    void pushNewConnection(const Comm::ConnectionPointer &conn);

private:
    CachePeer *peer; 
    RefCount<HttpRequest> request; 
    AsyncCall::Pointer opener; 
    AsyncCall::Pointer securer; 
    AsyncCall::Pointer closer; 
    unsigned int addrUsed; 
};

#endif /* SQUID_PEERPOOLMGR_H */