gov.aps.jca
Class Channel

java.lang.Object
  |
  +--gov.aps.jca.Channel

public abstract class Channel

extends java.lang.Object

The class representing a CA Channel.

A Channel is a link between a client (the application) and a CA process variable located on a CA server. All operations between the client and the process variable are handled by objects of this class.

The following code shows how to synchronously create a channel.

  try {
    JCALibrary jca= JCALibrary.getInstance();
    Context ctxt= jca.createContext(JCALibrary.JNI_THREAD_SAFE);
    Channel ch= ctxt.createChannel("my.Channel");
    ctxt.pendIO(1.0);
    ... // If we're here, then the channel has been found and connected.
    ...
    ch.destroy();
    ctxt.destroy();
  } catch(CAException caEx) {
    System.err.println("A Error occured: "+caEx);
  }
 

The following code shows how to asynchronously create a channel.

  try {
    JCALibrary jca= JCALibrary.getInstance();
    Context ctxt= jca.createContext(JCALibrary.JNI_THREAD_SAFE);
    Channel ch= ctxt.createChannel("my.Channel", new ConnectionListener() {
      public void connectionChanged(ConnectionEvent ev) {
        System.out.println("Channel is connected: "+ev.isConnected());
      });
    ctxt.flushIO();
    ... // We have no clue on whether the channel has been found and connected.
    ... // until the connection callback is called.
    ... //
    ch.destroy();
    ctxt.destroy();
  } catch(CAException caEx) {
    System.err.println("A Error occured: "+caEx);
  }
 

See Also:

Context

Nested Class Summary

static class

Channel.ConnectionState Enumeration class representing the Channel's connection state.

Field Summary

static Channel.ConnectionState	CLOSED Channel has been closed and destroyed.
static Channel.ConnectionState	CONNECTED Channel is connected.
static Channel.ConnectionState	DISCONNECTED Channel is disconnected.
static Channel.ConnectionState	NEVER_CONNECTED Channel has never been connected.

Constructor Summary

Channel()

Method Summary

abstract void	addAccessRightsListener(AccessRightsListener l) Adds a AccessRightsListener which will be notified of the access rights's changes of this Channel.
abstract void	addConnectionListener(ConnectionListener l) Adds a ConnectionListener which will be notified of the connection state's changes of this Channel.
Monitor	addMonitor(DBRType type, int count, int mask) Add a monitor to this channel.
abstract Monitor	addMonitor(DBRType type, int count, int mask, MonitorListener l) Adds a monitor to this Channel.
Monitor	addMonitor(int mask) Add a monitor to this channel using the channel's native DBR type and count.
Monitor	addMonitor(int mask, MonitorListener l) Add a monitor to this channel using the channel's native DBR type and count.
abstract void	destroy() Clear the ressources used by this channel.
void	dispose()
DBR	get() Synchronously reads this Channel's value using the native DBR type and count.
abstract DBR	get(DBRType type, int count) Synchronously Reads a specified number of elements of a specified type from this Channel.
abstract void	get(DBRType type, int count, GetListener l) Asynchronously reads a specified number of elements of a specified type from this Channel
void	get(GetListener l) Asynchronously reads this Channel's value using the native DBR type and count.
DBR	get(int count) Synchronously Reads a specified number elements from this Channel value using the native DBR type.
void	get(int count, GetListener l) Asynchronously Reads a specified number from this Channel's value using the native DBR type.
abstract AccessRightsListener[]	getAccessRightsListeners() Returns the AccessRightsListeners registered with this channel.
abstract ConnectionListener[]	getConnectionListeners() Returns the ConnectionListeners registered with this channel.
abstract Channel.ConnectionState	getConnectionState() Returns the connection state of this channel.
abstract Context	getContext() Returns the context which created this channel.
abstract int	getElementCount() Returns the element count of this channel.
abstract DBRType	getFieldType() Returns the DBR type of this Channel.
abstract java.lang.String	getHostName() Returns the Channel's hostname.
abstract java.lang.String	getName() Returns the name of this channel.
abstract boolean	getReadAccess() Returns whether read operations are allowed on this Channel.
abstract boolean	getWriteAccess() Returns whether write operations are allowed on this Channel.
void	printInfo() Prints details information about this Channel to the standard output stream.
void	printInfo(java.io.PrintStream out) Prints details information about this Channel to the specified output stream.
void	put(byte value) Synchrously writes a value to this Channel.
abstract void	put(byte[] value) Synchrously writes an array to this Channel.
abstract void	put(byte[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(byte value, PutListener l) Asynchrously writes a value to this Channel.
void	put(double value) Synchrously writes a value to this Channel.
abstract void	put(double[] value) Synchrously writes an array to this Channel.
abstract void	put(double[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(double value, PutListener l) Asynchrously writes a value to this Channel.
void	put(float value) Synchrously writes a value to this Channel.
abstract void	put(float[] value) Synchrously writes an array to this Channel.
abstract void	put(float[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(float value, PutListener l) Asynchrously writes a value to this Channel.
void	put(int value) Synchrously writes a value to this Channel.
abstract void	put(int[] value) Synchrously writes an array to this Channel.
abstract void	put(int[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(int value, PutListener l) Asynchrously writes a value to this Channel.
void	put(short value) Synchrously writes a value to this Channel.
abstract void	put(short[] value) Synchrously writes an array to this Channel.
abstract void	put(short[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(short value, PutListener l) Asynchrously writes a value to this Channel.
void	put(java.lang.String value) Synchrously writes a value to this Channel.
abstract void	put(java.lang.String[] value) Synchrously writes an array to this Channel.
abstract void	put(java.lang.String[] value, PutListener l) Asynchrously writes an array to this Channel.
void	put(java.lang.String value, PutListener l) Asynchrously writes a value to this Channel.
abstract void	removeAccessRightsListener(AccessRightsListener l) Removes a AccessRightsListener which will be notified of the access rights's changes of this Channel.
abstract void	removeConnectionListener(ConnectionListener l) Removes a ConnectionListener .

Methods inherited from class java.lang.Object

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

Field Detail

NEVER_CONNECTED

public static final Channel.ConnectionState NEVER_CONNECTED

Channel has never been connected.

DISCONNECTED

public static final Channel.ConnectionState DISCONNECTED

Channel is disconnected.

CONNECTED

public static final Channel.ConnectionState CONNECTED

Channel is connected.

CLOSED

public static final Channel.ConnectionState CLOSED

Channel has been closed and destroyed.

Constructor Detail

Channel

public Channel()

Method Detail

getContext

public abstract Context getContext()
                            throws java.lang.IllegalStateException

Returns the context which created this channel.

Returns:

the context

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

destroy

public abstract void destroy()
                      throws CAException,
                             java.lang.IllegalStateException

Clear the ressources used by this channel. No further access should be made to a channel after it has been destroyed.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

CAException

getConnectionListeners

public abstract ConnectionListener[] getConnectionListeners()
                                                     throws java.lang.IllegalStateException

Returns the ConnectionListeners registered with this channel.

Returns:

an array containing the ConnectionListeners.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

addConnectionListener

public abstract void addConnectionListener(ConnectionListener l)
                                    throws CAException,
                                           java.lang.IllegalStateException

Adds a ConnectionListener which will be notified of the connection state's changes of this Channel.

Parameters:

l - the ConnectionListener to register.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

removeConnectionListener

public abstract void removeConnectionListener(ConnectionListener l)
                                       throws CAException,
                                              java.lang.IllegalStateException

Removes a ConnectionListener .

Parameters:

l - the ConnectionListener to remove.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getAccessRightsListeners

public abstract AccessRightsListener[] getAccessRightsListeners()
                                                         throws java.lang.IllegalStateException

Returns the AccessRightsListeners registered with this channel.

Returns:

an array containing the AccessRightsListeners.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

addAccessRightsListener

public abstract void addAccessRightsListener(AccessRightsListener l)
                                      throws CAException,
                                             java.lang.IllegalStateException

Adds a AccessRightsListener which will be notified of the access rights's changes of this Channel.

Parameters:

l - the ConnectionListener to register.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

removeAccessRightsListener

public abstract void removeAccessRightsListener(AccessRightsListener l)
                                         throws CAException,
                                                java.lang.IllegalStateException

Removes a AccessRightsListener which will be notified of the access rights's changes of this Channel.

Parameters:

l - the ConnectionListener to remove.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getName

public abstract java.lang.String getName()
                                  throws java.lang.IllegalStateException

Returns the name of this channel.

Returns:

the name of this Channel.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getFieldType

public abstract DBRType getFieldType()
                              throws java.lang.IllegalStateException

Returns the DBR type of this Channel.

Returns:

the DBR type.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

See Also:

DBR

getElementCount

public abstract int getElementCount()
                             throws java.lang.IllegalStateException

Returns the element count of this channel.

Returns:

the element count.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getConnectionState

public abstract Channel.ConnectionState getConnectionState()
                                                    throws java.lang.IllegalStateException

Returns the connection state of this channel.

Returns:

the ConnectionState value.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

See Also:

Channel.ConnectionState

getHostName

public abstract java.lang.String getHostName()
                                      throws java.lang.IllegalStateException

Returns the Channel's hostname.

Returns:

the hostname.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getReadAccess

public abstract boolean getReadAccess()
                               throws java.lang.IllegalStateException

Returns whether read operations are allowed on this Channel.

Returns:

true is read operations are allowed, false otherwise.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

getWriteAccess

public abstract boolean getWriteAccess()
                                throws java.lang.IllegalStateException

Returns whether write operations are allowed on this Channel.

Returns:

true is write operations are allowed, false otherwise.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(byte value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(byte value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(short value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(short value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(int value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(int value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(float value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(float value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(double value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(double value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(java.lang.String value)
         throws CAException,
                java.lang.IllegalStateException

Synchrously writes a value to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public void put(java.lang.String value,
                PutListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchrously writes a value to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(byte[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(byte[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(short[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(short[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(int[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(int[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(float[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(float[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(double[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(double[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(java.lang.String[] value)
                  throws CAException,
                         java.lang.IllegalStateException

Synchrously writes an array to this Channel.

Parameters:

value - the value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

put

public abstract void put(java.lang.String[] value,
                         PutListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchrously writes an array to this Channel.

Parameters:

value - the value.

l - the PutListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public DBR get()
        throws CAException,
               java.lang.IllegalStateException

Synchronously reads this Channel's value using the native DBR type and count.

Returns:

the channel's value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public void get(GetListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchronously reads this Channel's value using the native DBR type and count.

Parameters:

l - the GetListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public DBR get(int count)
        throws CAException,
               java.lang.IllegalStateException

Synchronously Reads a specified number elements from this Channel value using the native DBR type.

Parameters:

count - the number of element to read.

Returns:

the channel's value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public void get(int count,
                GetListener l)
         throws CAException,
                java.lang.IllegalStateException

Asynchronously Reads a specified number from this Channel's value using the native DBR type.

Parameters:

count - the number of element to read.

l - the GetListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public abstract DBR get(DBRType type,
                        int count)
                 throws CAException,
                        java.lang.IllegalStateException

Synchronously Reads a specified number of elements of a specified type from this Channel.

Parameters:

type - the DBR type to read.

count - the number of element to read.

Returns:

the channel's value.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

get

public abstract void get(DBRType type,
                         int count,
                         GetListener l)
                  throws CAException,
                         java.lang.IllegalStateException

Asynchronously reads a specified number of elements of a specified type from this Channel

Parameters:

type - the DBR type.

count - the number of element to read.

l - the GetListener to notify when the request has been completed.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

addMonitor

public Monitor addMonitor(int mask)
                   throws CAException,
                          java.lang.IllegalStateException

Add a monitor to this channel using the channel's native DBR type and count.

Parameters:

mask - the mask value indicating when the listener need to be notified.

Returns:

the Monitor object representing this monitor.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

addMonitor

public Monitor addMonitor(int mask,
                          MonitorListener l)
                   throws CAException,
                          java.lang.IllegalStateException

Add a monitor to this channel using the channel's native DBR type and count.

Parameters:

mask - the mask value indicating when the listener need to be notified.

l - a MonitorListener to be notified when the value/log/alarm changed.

Returns:

the Monitor object representing this monitor.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

See Also:

Monitor

addMonitor

public Monitor addMonitor(DBRType type,
                          int count,
                          int mask)
                   throws CAException,
                          java.lang.IllegalStateException

Add a monitor to this channel.

Parameters:

type - the monitor's type.

count - the monitor's element count.

mask - the mask value indicating when the listener need to be notified.

Returns:

the Monitor object representing this monitor.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

addMonitor

public abstract Monitor addMonitor(DBRType type,
                                   int count,
                                   int mask,
                                   MonitorListener l)
                            throws CAException,
                                   java.lang.IllegalStateException

Adds a monitor to this Channel.

Parameters:

type - the monitor's type.

count - the monitor's element count.

mask - the mask value indicating when the listener need to be notified.

l - a MonitorListener to be notified when the value/log/alarm changed.

Returns:

the Monitor object representing this monitor.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

See Also:

Monitor

printInfo

public void printInfo()
               throws java.lang.IllegalStateException

Prints details information about this Channel to the standard output stream.

Throws:

java.lang.IllegalStateException - if the channel is in no state to perform this operation (ie destroyed, etc...)

printInfo

public void printInfo(java.io.PrintStream out)
               throws java.lang.IllegalStateException

Prints details information about this Channel to the specified output stream.

Parameters:

out - the output stream.

Throws:

CAException - if a Channel Exception occured while performing this operation.

java.lang.IllegalStateException

dispose

public void dispose()