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WebLogic Server 6.0sp2 API Reference

## weblogic.common
Class T3Client

    java.lang.Object
      |
      +--weblogic.common.T3Client

public class T3Client
extends java.lang.Object
implements weblogic.rjvm.PeerGoneListener, ClientCallback

Class for creating and managing T3Clients. A T3Client must be constructed with the URL of the WebLogic Server that it will connect to. A T3Client may access many services within WebLogic.

The URL for constructing the T3Client follows the pattern:

     scheme://WebLogicHost:port

The scheme identifies the client access. Valid schemes are currently:

- t3:// for standard T3Client-to-WebLogic communications
- t3s:// for secure T3Client-to-WebLogic communications using WebLogic SSL
- http:// for HTTP tunneling over port 80, for transfirewall T3Client-to-WebLogic communications

A T3Client has a Workspace inside the WebLogic Server that can be named and saved, so that the T3Client can disconnect and then return later to the same Workspace. The T3Client Workspace is at the lowest level of a hierarchy of Workspaces that exist for WebLogic Clusters, WebLogic Servers, T3Users and groups, and T3Clients. T3Clients can set various timeouts to control disconnects from the WebLogic Server; a T3Client can also add entries to the WebLogic logfile, and can store and fetch arbitrary objects from its own Workspace or the other Workspaces within its access.

Author:
  Copyright (c) 1996-1998 by WebLogic, Inc. All Rights Reserved., Copyright (c) 1998-2000 BEA Systems, Inc. All Rights Reserved.
  Copyright © 2001 BEA Systems, Inc. All Rights Reserved.
See Also:
  `T3ServicesDef`

Field Summary
`static int` | `DISCONNECT_TIMEOUT_DEFAULT` The default DISCONNECT_TIMEOUT value set in the server configuration.
`static int` | `DISCONNECT_TIMEOUT_NEVER` Disables disconnect altogether.
`static int` | `INVALID_CALLBACK_ID`
`T3ServicesDef` | `services` Defines the WebLogic services that a T3Client can access.

Constructor Summary
`T3Client(java.lang.String url)` Constructs a T3Client.
`T3Client(java.lang.String url, java.lang.String workspace)` Constructs a T3Client.
`T3Client(java.lang.String url, java.lang.String workspace, UserInfo t3u)` Constructs a T3Client.
`T3Client(java.lang.String url, UserInfo t3u)` Constructs a T3Client.
`T3Client(T3Connection conn)` Constructs a T3Client over the specified T3Connection.
`T3Client(T3Connection conn, java.lang.String workspace)`

Method Summary
`void` | `addDisconnectListener(DisconnectListener dl)` Adds a T3Client to the list of those clients listening for a DisconnectEvent.
`T3Client` | `connect()` Connects the T3Client to a WebLogic Server.
`T3Client` | `disconnect()` Disconnects a T3Client from the WebLogic Server.
`void` | `dispatch(java.lang.Throwable problem, java.lang.Object msg)`
`int` | `getHardDisconnectTimeoutMins()` Gets the value for a T3Client's hard disconnect timeout in minutes.
`int` | `getIdleDisconnectTimeoutMins()` Gets the value for a T3Client's idle disconnect timeout in minutes.
`java.lang.String` | `getServerName()` Gets the name of the WebLogic Server to which the T3Client is currently connected.
`int` | `getSoftDisconnectTimeoutMins()` Gets the value for a T3Client's soft disconnect timeout in minutes.
`T3Connection` | `getT3Connection()` Returns the T3Connection object by which a T3Client is connected to a WebLogic Server.
`T3ServicesDef` | `getT3Services()` Returns the WebLogic services that a T3Client can access.
`boolean` | `getVerbose()` Gets the verbose setting for a T3Client.
`java.lang.String` | `getWorkspaceID()` Deprecated. Use t3.services.workspace().getID();
`java.lang.String` | `getWorkspaceName()` Deprecated. Use t3.services.workspace().getName();
`protected java.lang.String` | `getWSID()`
`boolean` | `isConnected()` Determines whether the T3Client is connected to a WebLogic Server, that is, whether the `connect()` method has been called for this T3Client and the T3Client is currently connected.
`java.lang.Class` | `loadClass(java.lang.String className)`
`void` | `peerGone(weblogic.rjvm.PeerGoneEvent pge)`
`int` | `registerCallback(ClientCallback c, boolean orderingIsCrucial)` Registers a callback.
`void` | `removeDisconnectListener(DisconnectListener dl)` Removes a T3Client from the list of those clients listening for a DisconnectEvent.
`void` | `sendOneWay(java.lang.String clss, java.lang.Object o)`
`java.lang.Object` | `sendRecv(java.lang.String clss, java.lang.Object o)`
`weblogic.rjvm.Response` | `sendRecvAsync(java.lang.String clss, java.lang.Object o)` Replaces sendRecv and sendLazy/recv, because it is non-blocking.
`T3Client` | `setHardDisconnectTimeoutMins(int minutes)` Sets the value for a T3Client's hard disconnect timeout in minutes.
`T3Client` | `setIdleDisconnectTimeoutMins(int minutes)` Sets the value for a T3Client's idle disconnect timeout in minutes.
`T3Client` | `setSoftDisconnectTimeoutMins(int minutes)` Sets the value for a T3Client's soft disconnect timeout in minutes.
`T3Client` | `setVerbose(boolean verbose)` Sets the verbose setting for a T3Client.
`boolean` | `timeTraceEnable(java.io.PrintStream ps)` Enables time tracing to the specified print stream.
`boolean` | `timeTraceEnabled()` Determines whether time tracing has been enabled.
`java.lang.String` | `toString()` Returns a string representation of the T3Client, including the name of the host, the port to which it is connected, and its Workspace ID.
`void` | `unregisterCallback(int callbackID)`

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

Field Detail

### DISCONNECT_TIMEOUT_DEFAULT

    public static final int DISCONNECT_TIMEOUT_DEFAULT

  The default DISCONNECT_TIMEOUT value set in the server configuration.

### DISCONNECT_TIMEOUT_NEVER

    public static final int DISCONNECT_TIMEOUT_NEVER

  Disables disconnect altogether. Setting a soft disconnect timeout of "never" keeps WebLogic from cleaning up (destroying) a T3Client's resources in the WebLogic Server, including its Workspace.

### services

    public T3ServicesDef services

  Defines the WebLogic services that a T3Client can access. It is used to access the object factory for a WebLogic service or facility. This example shows how a T3Client accesses WebLogic Remote computing services (T3Servlets). First the client requests a T3Servlet object from the object factory for that facility. Then it executes it inside WebLogic. In this example, the class pathname of the T3Servlet is "tutorial.t3client.StartupQuery" and the T3Client is "t3". The ParamSet for the T3Servlet is "ps".

         T3ServletDef t3s =
           t3.services.remote().getT3Servlet("tutorial.t3client.StartupQuery");
         t3s.execute(ps);

### INVALID_CALLBACK_ID

    public static final int INVALID_CALLBACK_ID

Constructor Detail

### T3Client

    public T3Client(T3Connection conn,
                    java.lang.String workspace)

### T3Client

    public T3Client(T3Connection conn)

  Constructs a T3Client over the specified T3Connection. The T3Connection represents other information necessary for the client to gain access to the WebLogic Server, including the WebLogic host and port and a UserInfo username and password.

  Parameters:
    `conn` - T3Connection to a WebLogic Server

### T3Client

    public T3Client(java.lang.String url,
                    java.lang.String workspace,
                    UserInfo t3u)
             throws java.net.UnknownHostException,
                    T3Exception,
                    java.io.IOException

  Constructs a T3Client. The WebLogic URL should follow the pattern "t3://WebLogicHost:port", where the WebLogicHost is the host name of the WebLogic Server, and the port is the TCP port over which the WebLogic Server is listening for T3Client connections (defaults to port 80, if no port number is provided).

  The Workspace is the name or ID of an existing Workspace; if there is no Workspace on the WebLogic Server with that name or ID, the argument is assumed to be the name of a new T3Client Workspace that is to be created. When you specify the name of a Workspace on WebLogic, that name is implicitly qualified on the left by the UserInfo's username, after the pattern "username:workspaceName".

  Parameters:
    `url` - URL for the WebLogic Server
    `workspace` - Name or ID of a client Workspace
    `t3u` - A UserInfo that has access to the WebLogic Server
  Throws:
    java.net.UnknownHostException - if the URL for the WebLogic Server is invalid
    T3Exception - if there is an error creating the T3Client
    java.io.IOException - if there is an IO error with the connection

### T3Client

    public T3Client(java.lang.String url,
                    java.lang.String workspace)
             throws java.net.UnknownHostException,
                    T3Exception,
                    java.io.IOException

  Constructs a T3Client. The WebLogic URL should follow the pattern "t3://WebLogicHost:port", where the WebLogicHost is the host name of the WebLogic Server, and the port is the TCP port over which WebLogic is listening for T3Client connections (defaults to port 80, if no port number is provided).

  The Workspace is the name or ID of an existing Workspace; if there is no Workspace on the WebLogic Server with that name or ID, the argument is assumed to be the name of a new T3Client Workspace that is to be created. When you specify the name of a Workspace on WebLogic, that name is implicitly qualified on the left by the UserInfo's username, after the pattern "username:workspaceName". The default UserInfo is "T3User.GUEST".

  Parameters:
    `url` - URL for the WebLogic Server
    `workspace` - Name or ID of a client workspace
  Throws:
    java.net.UnknownHostException - if the URL for the WebLogic Server is invalid
    T3Exception - if there is an error creating the T3Client
    java.io.IOException - if there is an IO error with the connection

### T3Client

    public T3Client(java.lang.String url)
             throws java.net.UnknownHostException,
                    T3Exception,
                    java.io.IOException

  Constructs a T3Client. The WebLogic URL should follow the pattern "t3://WebLogicHost:port", where the WebLogicHost is the host name of the WebLogic Server, and the port is the TCP port over which WebLogic is listening for T3Client connections (defaults to port 80, if no port number is provided).

  Parameters:
    `url` - URL for the WebLogic Server
  Throws:
    java.net.UnknownHostException - if the URL for the WebLogic Server is invalid
    T3Exception - if there is an error creating the T3Client
    java.io.IOException - if there is an IO error with the connection

### T3Client

    public T3Client(java.lang.String url,
                    UserInfo t3u)
             throws java.net.UnknownHostException,
                    T3Exception,
                    java.io.IOException

  Constructs a T3Client. The WebLogic URL should follow the pattern "t3://WebLogicHost:port", where the WebLogicHost is the host name of WebLogic, and the port is the TCP port over which the WebLogic Server is listening for T3Client connections (defaults to port 80, if no port number is provided).

  Parameters:
    `url` - URL for the WebLogic Server
    `t3u` - A UserInfo that has access to the WebLogic Server
  Throws:
    java.net.UnknownHostException - if the URL for the WebLogic Server is invalid
    T3Exception - if there is an error creating the T3Client
    java.io.IOException - if there is an IO error with the connection

Method Detail

### getT3Services

    public T3ServicesDef getT3Services()

  Returns the WebLogic services that a T3Client can access.

  Returns:
    T3Services object that gives a T3Client access to WebLogic services

### isConnected

    public boolean isConnected()

  Determines whether the T3Client is connected to a WebLogic Server, that is, whether the `connect()` method has been called for this T3Client and the T3Client is currently connected. Making a call on a disconnected client causes a `T3Exception [T3Client not connected]` to be thrown.

  Also see Writing a T3Client application, in the WebLogic Server documentation, on how to set up a T3Client to listen for its own disconnect event.

  Returns:
    True if the T3Client is connected
  See Also:
    `connect()`

### getT3Connection

    public T3Connection getT3Connection()

  Returns the T3Connection object by which a T3Client is connected to a WebLogic Server. The T3Connection represents other information necessary for the client to gain access to the WebLogic Server, including the WebLogic host and port and a UserInfo username and password.

  Returns:
    Connection object

### getWorkspaceID

    public java.lang.String getWorkspaceID()

  Deprecated. Use t3.services.workspace().getID();

### getWSID

    protected java.lang.String getWSID()

### getWorkspaceName

    public java.lang.String getWorkspaceName()

  Deprecated. Use t3.services.workspace().getName();

### timeTraceEnabled

    public boolean timeTraceEnabled()

  Determines whether time tracing has been enabled.

  Returns:
    true if time tracing is enabled

### timeTraceEnable

    public boolean timeTraceEnable(java.io.PrintStream ps)

  Enables time tracing to the specified print stream.

  Parameters:
    `ps` - PrintStream
  Returns:
    true if time tracing is enabled

### connect

    public T3Client connect()
                     throws java.io.IOException,
                            T3Exception,
                            T3ExecuteException,
                            java.lang.SecurityException

  Connects the T3Client to a WebLogic Server.

  Returns:
    T3Client connected to a WebLogic Server
  Throws:
    java.io.IOException - if an IO error occurs
    T3Exception - if there is an error with the connect request
    T3ExecuteException - if there is an error with the connect request
    java.lang.SecurityException - if there is an error with the connect request

### addDisconnectListener

    public void addDisconnectListener(DisconnectListener dl)

  Adds a T3Client to the list of those clients listening for a DisconnectEvent.

  Parameters:
    `dl` - DisconnectListener

### removeDisconnectListener

    public void removeDisconnectListener(DisconnectListener dl)

  Removes a T3Client from the list of those clients listening for a DisconnectEvent.

  Parameters:
    `dl` - DisconnectListener

### disconnect

    public T3Client disconnect()
                        throws java.io.IOException,
                               T3Exception

  Disconnects a T3Client from the WebLogic Server. Calling disconnect invokes a soft disconnect. A T3Client's resources inside WebLogic will be cleaned up (destroyed) when the soft disconnect timeout expires. Setting the disconnect timeout to never effectively prevents WebLogic from disposing of the T3Client's resources.

  Check the Developers Guide, Writing a T3Client application, in the WebLogic Server documentation, for info on how to set up a T3Client to listen for its own disconnect event. A T3Client can listen for a disconnect event that is the result of a soft or idle disconnect timeout.

  Returns:
    T3Client
  Throws:
    java.io.IOException - if an IO error occurs
    T3Exception - if there is an error with the disconnect request

### peerGone

    public void peerGone(weblogic.rjvm.PeerGoneEvent pge)

  Specified by:
    peerGone in interface weblogic.rjvm.PeerGoneListener

### dispatch

    public void dispatch(java.lang.Throwable problem,
                         java.lang.Object msg)

  Specified by:
    dispatch in interface ClientCallback

### getHardDisconnectTimeoutMins

    public int getHardDisconnectTimeoutMins()

  Gets the value for a T3Client's hard disconnect timeout in minutes. The timeout is how long WebLogic will wait to clean up a T3Client's resources after the socket supporting the T3Client's connection goes away. The default timeout is 0 (immediately).

  Returns:
    Minutes (as an int)

### setHardDisconnectTimeoutMins

    public T3Client setHardDisconnectTimeoutMins(int minutes)
                                          throws RemoteException,
                                                 T3Exception

  Sets the value for a T3Client's hard disconnect timeout in minutes. The timeout is how long WebLogic will wait to clean up a T3Client's resources after the socket supporting the T3Client's connection goes away. The default timeout is 0 (immediately).

  Parameters:
    `minutes` - Delay before cleanup after a hard disconnect occurs
  Throws:
    RemoteException - if there is an error

### getSoftDisconnectTimeoutMins

    public int getSoftDisconnectTimeoutMins()

  Gets the value for a T3Client's soft disconnect timeout in minutes. The timeout is how long WebLogic will wait to clean up a T3Client's resources after the T3Client requests a disconnect with the disconnect() method. The default timeout is 0 (immediately).

  Returns:
    Minutes (as an int)
  See Also:
    `disconnect()`

### setSoftDisconnectTimeoutMins

    public T3Client setSoftDisconnectTimeoutMins(int minutes)
                                          throws RemoteException,
                                                 T3Exception

  Sets the value for a T3Client's soft disconnect timeout in minutes. The timeout is how long WebLogic will wait to clean up a T3Client's resources after the T3Client requests a disconnect with the disconnect() method. The default timeout is 0 (immediately). Setting the soft disconnect timeout to never effectively prevents WebLogic from cleaning up a client's resources after the disconnect() method is called.

  Check the Developers Guide, Writing a T3Client application, in the WebLogic Server documentation for more info on how to set up a T3Client to listen for its own disconnect event.

  Parameters:
    `minutes` - Delay after T3Client requests disconnect
  Throws:
    RemoteException - if there is an error
  See Also:
    `disconnect()`

### getIdleDisconnectTimeoutMins

    public int getIdleDisconnectTimeoutMins()

  Gets the value for a T3Client's idle disconnect timeout in minutes. This timeout is how long WebLogic will wait to clean up a T3Client's server resources after the WebLogic Server notices that the T3Client is idle. The default timeout is "never".

  Check the Developers Guide, Writing a T3Client application, in the WebLogic Server documentation, for more info on how to set up a T3Client to listen for its own disconnect event.

  Returns:
    Minutes (int)

### setIdleDisconnectTimeoutMins

    public T3Client setIdleDisconnectTimeoutMins(int minutes)
                                          throws RemoteException,
                                                 T3Exception

  Sets the value for a T3Client's idle disconnect timeout in minutes. This timeout is how long WebLogic will wait to clean up a T3Client's server resources after the WebLogic Server notices that the T3Client is idle. The default timeout is "never".

  Parameters:
    `minutes` - Minutes
  Returns:
    T3Client
  Throws:
    RemoteException - if there is an error
    T3Exception - if the timeout value is invalid or if it cannot be set

### getServerName

    public java.lang.String getServerName()

  Gets the name of the WebLogic Server to which the T3Client is currently connected. The name of the WebLogic Server is defined in the property `weblogic.system.name`.

### getVerbose

    public boolean getVerbose()

  Gets the verbose setting for a T3Client.

  Returns:
    true if verbose is set

### setVerbose

    public T3Client setVerbose(boolean verbose)
                        throws RemoteException

  Sets the verbose setting for a T3Client.

  Parameters:
    `verbose` - True if verbose should be set
  Throws:
    RemoteException - if there is an error

### toString

    public java.lang.String toString()

  Returns a string representation of the T3Client, including the name of the host, the port to which it is connected, and its Workspace ID.

  Overrides:
    toString in class java.lang.Object

### sendOneWay

    public void sendOneWay(java.lang.String clss,
                           java.lang.Object o)
                    throws RemoteException

### sendRecvAsync

    public weblogic.rjvm.Response sendRecvAsync(java.lang.String clss,
                                                java.lang.Object o)
                                         throws RemoteException

  Replaces sendRecv and sendLazy/recv, because it is non-blocking. The blocking calls are Response.getThrowable() and Response.getMsg().

  Throws:
    RemoteException - if there is an error

### sendRecv

    public java.lang.Object sendRecv(java.lang.String clss,
                                     java.lang.Object o)
                              throws T3Exception

### registerCallback

    public int registerCallback(ClientCallback c,
                                boolean orderingIsCrucial)

  Registers a callback. The returned integer should be used on the server in ClientContext.sendUnsolicitedData. Unless ordering is crucial, each post results in a separate ExecuteRequest which is enqueued to perform the dispatch, which will typically result in the dispatch being in the same order as posts. If ordering is crucial, postings are queued in a queue specific for this callback and every dispatch waits for the previous one to return.

### unregisterCallback

    public void unregisterCallback(int callbackID)

### loadClass

    public java.lang.Class loadClass(java.lang.String className)
                              throws java.lang.ClassNotFoundException

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