org.jacorb.orb.etf

Class ConnectionBase

java.lang.Object

org.omg.CORBA.LocalObject

org.omg.ETF._ConnectionLocalBase

org.jacorb.orb.etf.ConnectionBase

All Implemented Interfaces:

Serializable, Configurable, LocalInterface, Object, IDLEntity, org.omg.ETF.Connection, org.omg.ETF.ConnectionOperations

Direct Known Subclasses:

StreamConnectionBase

public abstract class ConnectionBase
extends org.omg.ETF._ConnectionLocalBase
implements Configurable

This an abstract base implementation of the ETF::Connection interface.

Author:

Nicolas Noffke, Andre Spiegel

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteArrayOutputStream	b_out Optionally initialised to be used in the dumping of messages.
protected Configuration	configuration
protected boolean	connected
protected String	connection_info
protected int	finalTimeout Time out after a close connection has been received.
protected org.slf4j.Logger	logger shared with sub classes
protected ORB	orb
protected ProfileBase	profile The Profile of the target / server side of the connection.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ConnectionBase()
protected	ConnectionBase(ConnectionBase other) Initialise this instance as a copy of another.

Method Summary

Methods

Modifier and Type	Method and Description
void	configure(Configuration config)
org.omg.ETF.Profile	get_server_profile()
protected String	getLocalhost()
protected abstract int	getTimeout()
protected abstract COMM_FAILURE	handleCommFailure(IOException exception) this is invoked whenever a communication error occurs.
boolean	is_connected()
protected abstract void	setTimeout(int timeout)
boolean	supports_callback() A boolean flag describing whether this connection supports the Bidirectional GIOP mechanism as described by GIOP-1.2 in CORBA 2.3.1 (OMG Document: formal/99-10-07).
protected COMM_FAILURE	to_COMM_FAILURE(IOException exception) convert the specified exception into a CORBA COMM_FAILURE
void	turnOnFinalTimeout() This is used to tell the transport that a CloseConnection has been sent, and that it should set a timeout in case the client doesn't close its side of the connection right away.
boolean	use_handle_time_out() A flag directing the ORB to use either the Handle class to perform data queries with a time_out, or the transport layer (through this connection).
boolean	wait_next_data(long time_out) Wait for the given time_out period for incoming data on this connection.

Methods inherited from class org.omg.ETF._ConnectionLocalBase

_ids

Methods inherited from class org.omg.CORBA.LocalObject

_create_request, _create_request, _duplicate, _get_domain_managers, _get_interface_def, _get_interface, _get_policy, _hash, _invoke, _is_a, _is_equivalent, _is_local, _non_existent, _orb, _release, _releaseReply, _request, _request, _servant_postinvoke, _servant_preinvoke, _set_policy_override, validate_connection

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.omg.ETF.ConnectionOperations

close, connect, flush, is_data_available, read, write

Methods inherited from interface org.omg.CORBA.Object

_create_request, _create_request, _duplicate, _get_domain_managers, _get_interface_def, _get_policy, _hash, _is_a, _is_equivalent, _non_existent, _release, _request, _set_policy_override

Field Detail

connected

protected boolean connected

b_out

protected ByteArrayOutputStream b_out

Optionally initialised to be used in the dumping of messages. See property jacorb.debug.dump_outgoing_messages. Default is off.

finalTimeout

protected int finalTimeout

Time out after a close connection has been received. See property jacorb.connection.timeout_after_closeconnection. Default 20000 milliseconds.

profile

protected ProfileBase profile

The Profile of the target / server side of the connection.

logger

protected org.slf4j.Logger logger

shared with sub classes

configuration

protected Configuration configuration

connection_info

protected String connection_info

orb

protected ORB orb

Constructor Detail

ConnectionBase

protected ConnectionBase()

ConnectionBase

protected ConnectionBase(ConnectionBase other)

Initialise this instance as a copy of another. Intended for use within subclass constructors.

Method Detail

configure

public void configure(Configuration config)
               throws ConfigurationException

Specified by:

configure in interface Configurable

Throws:

ConfigurationException

setTimeout

protected abstract void setTimeout(int timeout)

getTimeout

protected abstract int getTimeout()

get_server_profile

public org.omg.ETF.Profile get_server_profile()

Specified by:

get_server_profile in interface org.omg.ETF.ConnectionOperations

is_connected

public boolean is_connected()

Specified by:

is_connected in interface org.omg.ETF.ConnectionOperations

turnOnFinalTimeout

public void turnOnFinalTimeout()

This is used to tell the transport that a CloseConnection has been sent, and that it should set a timeout in case the client doesn't close its side of the connection right away. This should only be called on the thread that listens on the socket because timeouts are not applied until read() is called the next time.

handleCommFailure

protected abstract COMM_FAILURE handleCommFailure(IOException exception)

this is invoked whenever a communication error occurs. subclasses must provide a appropiate implementation. the simplest possible implementation would just pass in the specified exception to to_COMM_FAILURE and return the result.

to_COMM_FAILURE

protected COMM_FAILURE to_COMM_FAILURE(IOException exception)

convert the specified exception into a CORBA COMM_FAILURE

wait_next_data

public boolean wait_next_data(long time_out)

Wait for the given time_out period for incoming data on this connection. It shall return false if this call times out and no data is available. It may not throw a TIMEOUT exception. If data can already be read or arrives before the end of the time out, this function shall return true, immediately.

Specified by:

wait_next_data in interface org.omg.ETF.ConnectionOperations

supports_callback

public boolean supports_callback()

A boolean flag describing whether this connection supports the Bidirectional GIOP mechanism as described by GIOP-1.2 in CORBA 2.3.1 (OMG Document: formal/99-10-07). It shall return true if it does, and false if it does not.

Specified by:

supports_callback in interface org.omg.ETF.ConnectionOperations

use_handle_time_out

public boolean use_handle_time_out()

A flag directing the ORB to use either the Handle class to perform data queries with a time_out, or the transport layer (through this connection). The instance shall return true, if the Handle should signal time outs for read operations. Then the ORB may not call wait_next_data. Otherwise, a false shall be returned, and the function wait_next_data shall be implemented by this class.

Specified by:

use_handle_time_out in interface org.omg.ETF.ConnectionOperations

getLocalhost

protected final String getLocalhost()