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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SPDY_SPDY_SESSION_POOL_H_
#define NET_SPDY_SPDY_SESSION_POOL_H_
#pragma once
#include <map>
#include <list>
#include <string>
#include "base/basictypes.h"
#include "base/gtest_prod_util.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_errors.h"
#include "net/base/network_change_notifier.h"
namespace net {
class BoundNetLog;
class ClientSocketHandle;
class HttpNetworkSession;
class SpdySession;
// This is a very simple pool for open SpdySessions.
// TODO(mbelshe): Make this production ready.
class SpdySessionPool
: public base::RefCounted<SpdySessionPool>,
public NetworkChangeNotifier::Observer {
public:
SpdySessionPool();
// Either returns an existing SpdySession or creates a new SpdySession for
// use.
scoped_refptr<SpdySession> Get(
const HostPortPair& host_port_pair, HttpNetworkSession* session,
const BoundNetLog& net_log);
// Set the maximum concurrent sessions per domain.
static void set_max_sessions_per_domain(int max) {
if (max >= 1)
g_max_sessions_per_domain = max;
}
// Builds a SpdySession from an existing SSL socket. Users should try
// calling Get() first to use an existing SpdySession so we don't get
// multiple SpdySessions per domain. Note that ownership of |connection| is
// transferred from the caller to the SpdySession.
// |certificate_error_code| is used to indicate the certificate error
// encountered when connecting the SSL socket. OK means there was no error.
// For testing, setting is_secure to false allows Spdy to connect with a
// pre-existing TCP socket.
// Returns OK on success, and the |spdy_session| will be provided.
// Returns an error on failure, and |spdy_session| will be NULL.
net::Error GetSpdySessionFromSocket(
const HostPortPair& host_port_pair,
HttpNetworkSession* session,
ClientSocketHandle* connection,
const BoundNetLog& net_log,
int certificate_error_code,
scoped_refptr<SpdySession>* spdy_session,
bool is_secure);
// TODO(willchan): Consider renaming to HasReusableSession, since perhaps we
// should be creating a new session.
bool HasSession(const HostPortPair& host_port_pair)const;
// Close all Spdy Sessions; used for debugging.
void CloseAllSessions();
// Removes a SpdySession from the SpdySessionPool. This should only be called
// by SpdySession, because otherwise session->state_ is not set to CLOSED.
void Remove(const scoped_refptr<SpdySession>& session);
// NetworkChangeNotifier::Observer methods:
// We flush all idle sessions and release references to the active ones so
// they won't get re-used. The active ones will either complete successfully
// or error out due to the IP address change.
virtual void OnIPAddressChanged();
private:
friend class base::RefCounted<SpdySessionPool>;
friend class SpdySessionPoolPeer; // For testing.
friend class SpdyNetworkTransactionTest; // For testing.
FRIEND_TEST_ALL_PREFIXES(SpdyNetworkTransactionTest, WindowUpdateOverflow);
typedef std::list<scoped_refptr<SpdySession> > SpdySessionList;
typedef std::map<HostPortPair, SpdySessionList*> SpdySessionsMap;
virtual ~SpdySessionPool();
// Helper functions for manipulating the lists.
SpdySessionList* AddSessionList(const HostPortPair& host_port_pair);
SpdySessionList* GetSessionList(const HostPortPair& host_port_pair);
const SpdySessionList* GetSessionList(
const HostPortPair& host_port_pair) const;
void RemoveSessionList(const HostPortPair& host_port_pair);
// Releases the SpdySessionPool reference to all sessions. Will result in all
// idle sessions being deleted, and the active sessions from being reused, so
// they will be deleted once all active streams belonging to that session go
// away.
void ClearSessions();
// This is our weak session pool - one session per domain.
SpdySessionsMap sessions_;
static int g_max_sessions_per_domain;
DISALLOW_COPY_AND_ASSIGN(SpdySessionPool);
};
} // namespace net
#endif // NET_SPDY_SPDY_SESSION_POOL_H_
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