- java.lang.Object
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- java.rmi.server.RMISocketFactory
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- All Implemented Interfaces:
- RMIClientSocketFactory, RMIServerSocketFactory
public abstract class RMISocketFactory extends Object implements RMIClientSocketFactory, RMIServerSocketFactory
AnRMISocketFactory
instance is used by the RMI runtime in order to obtain client and server sockets for RMI calls. An application may use thesetSocketFactory
method to request that the RMI runtime use its socket factory instance instead of the default implementation.The default socket factory implementation used goes through a three-tiered approach to creating client sockets. First, a direct socket connection to the remote VM is attempted. If that fails (due to a firewall), the runtime uses HTTP with the explicit port number of the server. If the firewall does not allow this type of communication, then HTTP to a cgi-bin script on the server is used to POST the RMI call.
- Since:
- JDK1.1
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Constructor Summary
Constructors Constructor and Description RMISocketFactory()
Constructs anRMISocketFactory
.
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Method Summary
Methods Modifier and Type Method and Description abstract ServerSocket
createServerSocket(int port)
Create a server socket on the specified port (port 0 indicates an anonymous port).abstract Socket
createSocket(String host, int port)
Creates a client socket connected to the specified host and port.static RMISocketFactory
getDefaultSocketFactory()
Returns a reference to the default socket factory used by this RMI implementation.static RMIFailureHandler
getFailureHandler()
Returns the handler for socket creation failure set by thesetFailureHandler
method.static RMISocketFactory
getSocketFactory()
Returns the socket factory set by thesetSocketFactory
method.static void
setFailureHandler(RMIFailureHandler fh)
Sets the failure handler to be called by the RMI runtime if server socket creation fails.static void
setSocketFactory(RMISocketFactory fac)
Set the global socket factory from which RMI gets sockets (if the remote object is not associated with a specific client and/or server socket factory).
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Constructor Detail
-
RMISocketFactory
public RMISocketFactory()
Constructs anRMISocketFactory
.- Since:
- JDK1.1
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Method Detail
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createSocket
public abstract Socket createSocket(String host, int port) throws IOException
Creates a client socket connected to the specified host and port.- Specified by:
createSocket
in interfaceRMIClientSocketFactory
- Parameters:
host
- the host nameport
- the port number- Returns:
- a socket connected to the specified host and port.
- Throws:
IOException
- if an I/O error occurs during socket creation- Since:
- JDK1.1
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createServerSocket
public abstract ServerSocket createServerSocket(int port) throws IOException
Create a server socket on the specified port (port 0 indicates an anonymous port).- Specified by:
createServerSocket
in interfaceRMIServerSocketFactory
- Parameters:
port
- the port number- Returns:
- the server socket on the specified port
- Throws:
IOException
- if an I/O error occurs during server socket creation- Since:
- JDK1.1
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setSocketFactory
public static void setSocketFactory(RMISocketFactory fac) throws IOException
Set the global socket factory from which RMI gets sockets (if the remote object is not associated with a specific client and/or server socket factory). The RMI socket factory can only be set once. Note: The RMISocketFactory may only be set if the current security manager allows setting a socket factory; if disallowed, a SecurityException will be thrown.- Parameters:
fac
- the socket factory- Throws:
IOException
- if the RMI socket factory is already setSecurityException
- if a security manager exists and itscheckSetFactory
method doesn't allow the operation.- Since:
- JDK1.1
- See Also:
getSocketFactory()
,SecurityManager.checkSetFactory()
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getSocketFactory
public static RMISocketFactory getSocketFactory()
Returns the socket factory set by thesetSocketFactory
method. Returnsnull
if no socket factory has been set.- Returns:
- the socket factory
- Since:
- JDK1.1
- See Also:
setSocketFactory(RMISocketFactory)
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getDefaultSocketFactory
public static RMISocketFactory getDefaultSocketFactory()
Returns a reference to the default socket factory used by this RMI implementation. This will be the factory used by the RMI runtime whengetSocketFactory
returnsnull
.- Returns:
- the default RMI socket factory
- Since:
- JDK1.1
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setFailureHandler
public static void setFailureHandler(RMIFailureHandler fh)
Sets the failure handler to be called by the RMI runtime if server socket creation fails. By default, if no failure handler is installed and server socket creation fails, the RMI runtime does attempt to recreate the server socket.If there is a security manager, this method first calls the security manager's
checkSetFactory
method to ensure the operation is allowed. This could result in aSecurityException
.- Parameters:
fh
- the failure handler- Throws:
SecurityException
- if a security manager exists and itscheckSetFactory
method doesn't allow the operation.- Since:
- JDK1.1
- See Also:
getFailureHandler()
,RMIFailureHandler.failure(Exception)
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getFailureHandler
public static RMIFailureHandler getFailureHandler()
Returns the handler for socket creation failure set by thesetFailureHandler
method.- Returns:
- the failure handler
- Since:
- JDK1.1
- See Also:
setFailureHandler(RMIFailureHandler)
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