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## org.jivesoftware.openfire.net
Class VirtualConnection

    java.lang.Object
      org.jivesoftware.openfire.net.VirtualConnection

All Implemented Interfaces:
  Connection

Direct Known Subclasses:
  ClientSessionConnection, HttpSession.HttpVirtualConnection

    public abstract class VirtualConnection

extends Object
implements Connection

Abstract implementation of the Connection interface that models abstract connections. Abstract connections are connections that don't have a physical connection counterpart. Instead they can be seen as conceptual or just 'abstract' connections.

Default values and common behavior of virtual connections are modeled in this class. Subclasses should just need to specify how packets are delivered and what means closing the connection.

Author:
  Gaston Dombiak

Nested Class Summary

Nested classes/interfaces inherited from interface org.jivesoftware.openfire.Connection
`Connection.ClientAuth, Connection.CompressionPolicy, Connection.TLSPolicy`

Field Summary
`protected LocalSession` | `session`

Constructor Summary
`VirtualConnection()`

Method Summary
`void` | `addCompression()` Adds the compression filter to the connection but only filter incoming traffic.
`void` | `close()` Closes the session, the virtual connection and notifies listeners that the connection has been closed.
`abstract void` | `closeVirtualConnection()` Closes the virtual connection.
`Connection.CompressionPolicy` | `getCompressionPolicy()` Returns whether compression is optional or is disabled.
`String` | `getLanguage()` Returns the language code that should be used for this connection (e.g.
`Certificate[]` | `getLocalCertificates()` Returns the local underlying `X509Certificate` chain for the connection.
`int` | `getMajorXMPPVersion()` Returns the major version of XMPP being used by this connection (major_version.minor_version.
`int` | `getMinorXMPPVersion()` Returns the minor version of XMPP being used by this connection (major_version.minor_version.
`PacketDeliverer` | `getPacketDeliverer()` Returns the packet deliverer to use when delivering a packet over the socket fails.
`Certificate[]` | `getPeerCertificates()` Returns the underlying `X509Certificate` for the connection of the peer.
`Connection.TLSPolicy` | `getTlsPolicy()` Returns whether TLS is mandatory, optional or is disabled.
`void` | `init(LocalSession session)` Initializes the connection with it's owning session.
`boolean` | `isClosed()` Returns true if the connection/session is closed.
`boolean` | `isCompressed()` Returns true if the connection is using compression.
`boolean` | `isFlashClient()` Returns true if the connected client is a flash client.
`boolean` | `isSecure()` Returns true if this connection is secure.
`boolean` | `isUsingSelfSignedCertificate()` Returns true if the other peer of this session presented a self-signed certificate.
`void` | `registerCloseListener(ConnectionCloseListener listener, Object handbackMessage)` Registers a listener for close event notification.
`void` | `removeCloseListener(ConnectionCloseListener listener)` Removes a registered close event listener.
`void` | `setCompressionPolicy(Connection.CompressionPolicy compressionPolicy)` Sets whether compression is enabled or is disabled.
`void` | `setFlashClient(boolean flashClient)` Sets whether the connected client is a flash client.
`void` | `setLanaguage(String language)` Sets the language code that should be used for this connection (e.g.
`void` | `setTlsPolicy(Connection.TLSPolicy tlsPolicy)` Sets whether TLS is mandatory, optional or is disabled.
`void` | `setUsingSelfSignedCertificate(boolean isSelfSigned)` Keeps track if the other peer of this session presented a self-signed certificate.
`void` | `setXMPPVersion(int majorVersion, int minorVersion)` Sets the XMPP version information.
`void` | `startCompression()` Start compressing outgoing traffic for this connection.
`void` | `startTLS(boolean clientMode, String remoteServer, Connection.ClientAuth authentication)` Secures the plain connection by negotiating TLS with the other peer.
`boolean` | `validate()` Verifies that the connection is still live.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.jivesoftware.openfire.Connection
`deliver, deliverRawText, getAddress, getHostAddress, getHostName, systemShutdown`

Field Detail

### session

    protected LocalSession session

Constructor Detail

### VirtualConnection

    public VirtualConnection()

Method Detail

### getLanguage

    public String getLanguage()

  Description copied from interface: `Connection`
  Returns the language code that should be used for this connection (e.g. "en").

  Specified by:
    `getLanguage` in interface `Connection`
  Returns:
    the language code for the connection.

### getMajorXMPPVersion

    public int getMajorXMPPVersion()

  Description copied from interface: `Connection`
  Returns the major version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

  Specified by:
    `getMajorXMPPVersion` in interface `Connection`
  Returns:
    the major XMPP version being used by this connection.

### getMinorXMPPVersion

    public int getMinorXMPPVersion()

  Description copied from interface: `Connection`
  Returns the minor version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

  Specified by:
    `getMinorXMPPVersion` in interface `Connection`
  Returns:
    the minor XMPP version being used by this connection.

### getLocalCertificates

    public Certificate[] getLocalCertificates()

  Description copied from interface: `Connection`
  Returns the local underlying `X509Certificate` chain for the connection.

  Specified by:
    `getLocalCertificates` in interface `Connection`
  Returns:
    an ordered array of certificates, with the local certificate first followed by any certificate authorities. If no certificates is present for the connection, then `null` is returned.

### getPeerCertificates

    public Certificate[] getPeerCertificates()

  Description copied from interface: `Connection`
  Returns the underlying `X509Certificate` for the connection of the peer.

  Specified by:
    `getPeerCertificates` in interface `Connection`
  Returns:
    an ordered array of peer certificates, with the peer's own certificate first followed by any certificate authorities.

### setUsingSelfSignedCertificate

    public void setUsingSelfSignedCertificate(boolean isSelfSigned)

  Description copied from interface: `Connection`
  Keeps track if the other peer of this session presented a self-signed certificate. When using self-signed certificate for server-2-server sessions then SASL EXTERNAL will not be used and instead server-dialback will be preferred for vcerifying the identify of the remote server.

  Specified by:
    `setUsingSelfSignedCertificate` in interface `Connection`
  Parameters:
    `isSelfSigned` - true if the other peer presented a self-signed certificate.

### isUsingSelfSignedCertificate

    public boolean isUsingSelfSignedCertificate()

  Description copied from interface: `Connection`
  Returns true if the other peer of this session presented a self-signed certificate. When using self-signed certificate for server-2-server sessions then SASL EXTERNAL will not be used and instead server-dialback will be preferred for vcerifying the identify of the remote server.

  Specified by:
    `isUsingSelfSignedCertificate` in interface `Connection`
  Returns:
    true if the other peer of this session presented a self-signed certificate.

### isClosed

    public boolean isClosed()

  Description copied from interface: `Connection`
  Returns true if the connection/session is closed.

  Specified by:
    `isClosed` in interface `Connection`
  Returns:
    true if the connection is closed.

### getCompressionPolicy

    public Connection.CompressionPolicy getCompressionPolicy()

  Description copied from interface: `Connection`
  Returns whether compression is optional or is disabled.

  Specified by:
    `getCompressionPolicy` in interface `Connection`
  Returns:
    whether compression is optional or is disabled.

### getTlsPolicy

    public Connection.TLSPolicy getTlsPolicy()

  Description copied from interface: `Connection`
  Returns whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.

  Specified by:
    `getTlsPolicy` in interface `Connection`
  Returns:
    whether TLS is mandatory, optional or is disabled.

### isCompressed

    public boolean isCompressed()

  Description copied from interface: `Connection`
  Returns true if the connection is using compression.

  Specified by:
    `isCompressed` in interface `Connection`
  Returns:
    true if the connection is using compression.

### isFlashClient

    public boolean isFlashClient()

  Description copied from interface: `Connection`
  Returns true if the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".

  Specified by:
    `isFlashClient` in interface `Connection`
  Returns:
    true if the connected client is a flash client.

### setFlashClient

    public void setFlashClient(boolean flashClient)

  Description copied from interface: `Connection`
  Sets whether the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".

  Specified by:
    `setFlashClient` in interface `Connection`
  Parameters:
    `flashClient` - true if the if the connection is a flash client.

### setXMPPVersion

    public void setXMPPVersion(int majorVersion,
                               int minorVersion)

  Description copied from interface: `Connection`
  Sets the XMPP version information. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

  Specified by:
    `setXMPPVersion` in interface `Connection`
  Parameters:
    `majorVersion` - the major version.
    `minorVersion` - the minor version.

### setLanaguage

    public void setLanaguage(String language)

  Description copied from interface: `Connection`
  Sets the language code that should be used for this connection (e.g. "en").

  Specified by:
    `setLanaguage` in interface `Connection`
  Parameters:
    `language` - the language code.

### setCompressionPolicy

    public void setCompressionPolicy(Connection.CompressionPolicy compressionPolicy)

  Description copied from interface: `Connection`
  Sets whether compression is enabled or is disabled.

  Specified by:
    `setCompressionPolicy` in interface `Connection`
  Parameters:
    `compressionPolicy` - whether Compression is enabled or is disabled.

### setTlsPolicy

    public void setTlsPolicy(Connection.TLSPolicy tlsPolicy)

  Description copied from interface: `Connection`
  Sets whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.

  Specified by:
    `setTlsPolicy` in interface `Connection`
  Parameters:
    `tlsPolicy` - whether TLS is mandatory, optional or is disabled.

### getPacketDeliverer

    public PacketDeliverer getPacketDeliverer()

  Description copied from interface: `Connection`
  Returns the packet deliverer to use when delivering a packet over the socket fails. The packet deliverer will retry to send the packet using some other connection, will store the packet offline for later retrieval or will just drop it.

  Specified by:
    `getPacketDeliverer` in interface `Connection`
  Returns:
    the packet deliverer to use when delivering a packet over the socket fails.

### startTLS

    public void startTLS(boolean clientMode,
                         String remoteServer,
                         Connection.ClientAuth authentication)
                  throws Exception

  Description copied from interface: `Connection`
  Secures the plain connection by negotiating TLS with the other peer. In a server-2-server connection the server requesting the TLS negotiation will be the client and the other server will be the server during the TLS negotiation. Therefore, the server requesting the TLS negotiation must pass `true` in the `clientMode` parameter and the server receiving the TLS request must pass `false` in the `clientMode` parameter. Both servers should specify the xmpp domain of the other server in the `remoteServer` parameter.

  In the case of client-2-server the XMPP server must pass `false` in the `clientMode` parameter since it will behave as the server in the TLS negotiation. The `remoteServer` parameter will always be `null`.

  Specified by:
    `startTLS` in interface `Connection`
  Parameters:
    `clientMode` - boolean indicating if this entity is a client or a server in the TLS negotiation.
    `remoteServer` - xmpp domain of the remote server or `null`. When null a `ClientTrustManager` will be used for verifying certificates otherwise a `ServerTrustManager` will be used.
    `authentication` - policy to use for authenticating the remote peer.
  Throws:
    `Exception` - if an error occured while securing the connection.

### addCompression

    public void addCompression()

  Description copied from interface: `Connection`
  Adds the compression filter to the connection but only filter incoming traffic. Do not filter outgoing traffic since we still need to send an uncompressed stanza to the client indicating that he can start compressing the traffic. After we sent the uncompresses stanza we can start compression outgoing traffic as well.

  Specified by:
    `addCompression` in interface `Connection`

### startCompression

    public void startCompression()

  Description copied from interface: `Connection`
  Start compressing outgoing traffic for this connection. Compression will only be available after TLS has been negotiated. This means that a connection can never be using compression before TLS. However, it is possible to use compression without TLS.

  Specified by:
    `startCompression` in interface `Connection`

### isSecure

    public boolean isSecure()

  Description copied from interface: `Connection`
  Returns true if this connection is secure.

  Specified by:
    `isSecure` in interface `Connection`
  Returns:
    true if the connection is secure (e.g. SSL/TLS)

### validate

    public boolean validate()

  Description copied from interface: `Connection`
  Verifies that the connection is still live. Typically this is done by sending a whitespace character between packets.

  Specified by:
    `validate` in interface `Connection`
  Returns:
    true if the socket remains valid, false otherwise.

### init

    public void init(LocalSession session)

  Description copied from interface: `Connection`
  Initializes the connection with it's owning session. Allows the connection class to configure itself with session related information (e.g. stream ID).

  Specified by:
    `init` in interface `Connection`
  Parameters:
    `session` - the session that owns this connection

### close

    public void close()

  Closes the session, the virtual connection and notifies listeners that the connection has been closed.

  Specified by:
    `close` in interface `Connection`

### registerCloseListener

    public void registerCloseListener(ConnectionCloseListener listener,
                                      Object handbackMessage)

  Description copied from interface: `Connection`
  Registers a listener for close event notification. Registrations after the Session is closed will be immediately notified before the registration call returns (within the context of the registration call). An optional handback object can be associated with the registration if the same listener is registered to listen for multiple connection closures.

  Specified by:
    `registerCloseListener` in interface `Connection`
  Parameters:
    `listener` - the listener to register for events.
    `handbackMessage` - the object to send in the event notification.

### removeCloseListener

    public void removeCloseListener(ConnectionCloseListener listener)

  Description copied from interface: `Connection`
  Removes a registered close event listener. Registered listeners must be able to receive close events up until the time this method returns. (i.e. it is possible to call unregister, receive a close event registration, and then have the unregister call return.)

  Specified by:
    `removeCloseListener` in interface `Connection`
  Parameters:
    `listener` - the listener to deregister for close events.

### closeVirtualConnection

    public abstract void closeVirtualConnection()

  Closes the virtual connection. Subsclasses should indicate what closing a virtual connection means. At this point the session has a CLOSED state.

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