net2

package
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 Go to latest Published: Sep 18, 2014 License: BSD-3-Clause Imports: 5 Imported by: 0

Documentation

Overview

net2 is a collection of functions meant to supplement the capabilities provided by the standard "net" package.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func GetLocalIPs 

func GetLocalIPs() ([]*net.IP, error)

This returns the list of local ip addresses which other hosts can connect to (NOTE: Loopback ip is ignored).

func IsLocalhost 

func IsLocalhost(host string) bool

Given a host string, return true if the host is an ip (v4/v6) localhost.

Types

type ConnectionOptions 

type ConnectionOptions struct {
	// The maximum number of connections that can be active per host at any
	// given time (A non-positive value indicates the number of connections
	// is unbounded).
	MaxActiveConnections int32

	// The maximum number of idle connections per host that are kept alive by
	// the connection pool.
	MaxIdleConnections uint32

	// The maximum amount of time an idle connection can alive (if specified).
	MaxIdleTime *time.Duration

	// Dial specifies the dial function for creating network connections.
	// If Dial is nil, net.Dial is used.
	Dial func(network string, address string) (net.Conn, error)

	// This specifies the now time function.  When the function is non-nil, the
	// connection pool will use the specified function instead of time.Now to
	// generate the current time.
	NowFunc func() time.Time

	// This specifies the timeout for any Read() operation.
	ReadTimeout time.Duration

	// This specifies the timeout for any Write() operation.
	WriteTimeout time.Duration
}

type ConnectionPool 

type ConnectionPool interface {
	// This returns the number of active connections.
	NumActive() int32

	// This associates (network, address) to the connection pool; afterwhich,
	// the user can get connections to (network, address).
	Register(network string, address string) error

	// This dissociate (network, address) from the connection pool;
	// afterwhich, the user can no longer get connections to
	// (network, address).
	Unregister(network string, address string) error

	// This returns the list of registered (network, address) entries.
	ListRegistered() []NetworkAddress

	// This gets an active connection from the connection pool.  The connection
	// will remain active until one of the following is called:
	//  1. conn.ReleaseConnection()
	//  2. conn.DiscardConnection()
	//  3. pool.Release(conn)
	//  4. pool.Discard(conn)
	Get(network string, address string) (ManagedConn, error)

	// This releases an active connection back to the connection pool.
	Release(conn ManagedConn) error

	// This discards an active connection from the connection pool.
	Discard(conn ManagedConn) error

	// Enter the connection pool into lame duck mode.  The connection pool
	// will no longer return connections, and all idle connections are closed
	// immediately (including active connections that are released back to the
	// pool afterward).
	EnterLameDuckMode()
}

A generic interface for managed connection pool. All connection pool implementations must be threadsafe.

func NewMultiConnectionPool 

func NewMultiConnectionPool(
	options ConnectionOptions,
	createPool func(ConnectionOptions) ConnectionPool) ConnectionPool

This returns a MultiConnectionPool, which manages multiple (network, address) entries. The connections to each (network, address) entry acts independently.

When createPool is nil, NewSimpleConnectionPool is used as default.

func NewSimpleConnectionPool 

func NewSimpleConnectionPool(options ConnectionOptions) ConnectionPool

This returns a SimpleConnectionPool, where all connections are connected to (network, address)

type ManagedConn 

type ManagedConn interface {
	net.Conn

	// This returns the original (network, address) entry used for creating
	// the connection.
	Key() NetworkAddress

	// This returns the underlying net.Conn implementation.
	RawConn() net.Conn

	// This returns the connection pool which owns this connection.
	Owner() ConnectionPool

	// This indictes a user is done with the connection and releases the
	// connection back to the connection pool.
	ReleaseConnection() error

	// This indicates the connection is an invalid state, and that the
	// connection should be discarded from the connection pool.
	DiscardConnection() error
}

A connection managed by a connection pool. NOTE: SetDeadline, SetReadDeadline and SetWriteDeadline are disabled for managed connections. (The deadlines are set by the connection pool).

func NewManagedConn 

func NewManagedConn(
	network string,
	address string,
	conn net.Conn,
	pool ConnectionPool,
	options ConnectionOptions) ManagedConn

This creates a managed connection wrapper.

type ManagedConnImpl 

type ManagedConnImpl struct {
	// contains filtered or unexported fields
}

A physical implementation of ManagedConn

func (*ManagedConnImpl) Close 

func (c *ManagedConnImpl) Close() error

See net.Conn for documentation

func (*ManagedConnImpl) DiscardConnection 

func (c *ManagedConnImpl) DiscardConnection() error

See ManagedConn for documentation.

func (*ManagedConnImpl) Key 

func (c *ManagedConnImpl) Key() NetworkAddress

See ManagedConn for documentation.

func (*ManagedConnImpl) LocalAddr 

func (c *ManagedConnImpl) LocalAddr() net.Addr

See net.Conn for documentation

func (*ManagedConnImpl) Owner 

func (c *ManagedConnImpl) Owner() ConnectionPool

See ManagedConn for documentation.

func (*ManagedConnImpl) RawConn 

func (c *ManagedConnImpl) RawConn() net.Conn

See ManagedConn for documentation.

func (*ManagedConnImpl) Read 

func (c *ManagedConnImpl) Read(b []byte) (n int, err error)

See net.Conn for documentation

func (*ManagedConnImpl) ReleaseConnection 

func (c *ManagedConnImpl) ReleaseConnection() error

See ManagedConn for documentation.

func (*ManagedConnImpl) RemoteAddr 

func (c *ManagedConnImpl) RemoteAddr() net.Addr

See net.Conn for documentation

func (*ManagedConnImpl) SetDeadline 

func (c *ManagedConnImpl) SetDeadline(t time.Time) error

SetDeadline is disabled for managed connection (The deadline is set by us, with respect to the read/write timeouts specified in ConnectionOptions).

func (*ManagedConnImpl) SetReadDeadline 

func (c *ManagedConnImpl) SetReadDeadline(t time.Time) error

SetReadDeadline is disabled for managed connection (The deadline is set by us with respect to the read timeout specified in ConnectionOptions).

func (*ManagedConnImpl) SetWriteDeadline 

func (c *ManagedConnImpl) SetWriteDeadline(t time.Time) error

SetWriteDeadline is disabled for managed connection (The deadline is set by us with respect to the write timeout specified in ConnectionOptions).

func (*ManagedConnImpl) Write 

func (c *ManagedConnImpl) Write(b []byte) (n int, err error)

See net.Conn for documentation

type MultiConnectionPool 

type MultiConnectionPool struct {
	// contains filtered or unexported fields
}

A connection pool implementation that manages multiple (network, address) entries. The connections to each (network, address) entry acts independently. For example ("tcp", "localhost:11211") could act as memcache shard 0 and ("tcp", "localhost:11212") could act as memcache shard 1.

func (*MultiConnectionPool) Discard 

func (p *MultiConnectionPool) Discard(conn ManagedConn) error

See ConnectionPool for documentation.

func (*MultiConnectionPool) EnterLameDuckMode 

func (p *MultiConnectionPool) EnterLameDuckMode()

See ConnectionPool for documentation.

func (*MultiConnectionPool) Get 

func (p *MultiConnectionPool) Get(
	network string,
	address string) (ManagedConn, error)

See ConnectionPool for documentation.

func (*MultiConnectionPool) ListRegistered 

func (p *MultiConnectionPool) ListRegistered() []NetworkAddress

func (*MultiConnectionPool) NumActive 

func (p *MultiConnectionPool) NumActive() int32

See ConnectionPool for documentation.

func (*MultiConnectionPool) Register 

func (p *MultiConnectionPool) Register(network string, address string) error

See ConnectionPool for documentation.

func (*MultiConnectionPool) Release 

func (p *MultiConnectionPool) Release(conn ManagedConn) error

See ConnectionPool for documentation.

func (*MultiConnectionPool) Unregister 

func (p *MultiConnectionPool) Unregister(network string, address string) error

See ConnectionPool for documentation.

type NetworkAddress 

type NetworkAddress struct {
	Network string
	Address string
}

Dial's arguments.

type SimpleConnectionPool 

type SimpleConnectionPool struct {
	// contains filtered or unexported fields
}

A connection pool implementation where all connections are connected to the same (network, address).

func (*SimpleConnectionPool) Discard 

func (p *SimpleConnectionPool) Discard(conn ManagedConn) error

See ConnectionPool for documentation.

func (*SimpleConnectionPool) EnterLameDuckMode 

func (p *SimpleConnectionPool) EnterLameDuckMode()

See ConnectionPool for documentation.

func (*SimpleConnectionPool) Get 

func (p *SimpleConnectionPool) Get(
	network string,
	address string) (ManagedConn, error)

This gets an active connection from the connection pool. Note that network and address arguments are ignored (The connections with point to the network/address provided by the first Register call).

func (*SimpleConnectionPool) ListRegistered 

func (p *SimpleConnectionPool) ListRegistered() []NetworkAddress

func (*SimpleConnectionPool) NumActive 

func (p *SimpleConnectionPool) NumActive() int32

See ConnectionPool for documentation.

func (*SimpleConnectionPool) NumIdle 

func (p *SimpleConnectionPool) NumIdle() int

This returns the number of alive idle connections. This method is not part of ConnectionPool's API. It is used only for testing.

func (*SimpleConnectionPool) Register 

func (p *SimpleConnectionPool) Register(network string, address string) error

SimpleConnectionPool can only register a single (network, address) entry. Register should be call before any Get calls.

func (*SimpleConnectionPool) Release 

func (p *SimpleConnectionPool) Release(conn ManagedConn) error

See ConnectionPool for documentation.

func (*SimpleConnectionPool) Unregister 

func (p *SimpleConnectionPool) Unregister(
	network string,
	address string) error

SimpleConnectionPool does not support Unregister.

Source Files

View all Source files

Directories

Path Synopsis
http2 is a collection of functions meant to supplement the capabilities provided by the standard "net/http" package.
 http2 is a collection of functions meant to supplement the capabilities provided by the standard "net/http" package.
test_utils
Utility functions for testing net2/http2
 Utility functions for testing net2/http2

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