ORG.oclc.zbase.server
Class TransactionHandler

java.lang.Object
  |
  +--ORG.oclc.zbase.server.TransactionHandler

public class TransactionHandler

extends Object

implements Runnable

Process a Z39.50 request. Accepts the request from an ZBaseThread object, invokes a Db object and replies to the client.

Field Summary

protected DataOutputStream	dataOut Output stream for response.
protected boolean	holdConnection Flag to caller (ZBaseThread) that connection should be held open.
protected int	lastNewSessionId Last assigned session id.
protected BerString	message Z39.50 request.
protected BerString	response Z39.50 response.

Constructor Summary

TransactionHandler()
Just initialize the thread group.

Method Summary

protected BerString	AccessControl(DataDir dir) Z3950 AccessControl Response.
protected BerString	Close(DataDir dir) Z39.50 Close request.
protected BerString	Dedup(DataDir dir) Z39.50 Dedup request.
protected BerString	Delete(DataDir dir) Z39.50 Delete Hitlist request.
protected BerString	Display(DataDir dir) Z39.50 Present request.
protected BerString	Extsvc(DataDir dir) Z39.50 Extended Services request.
protected BerString	Find(DataDir dir) Z39.50 Search request.
static AccessClient	getUserAccessClient(String sessionID)
BerString	handle(BerString message) Handle the request.
protected BerString	Init(DataDir dir) Z39.50 Init request.
static void	init(IniFile ini, String serverName) Invokes the init method with the input IniFile object, serverName and the verbose flag set to true.
static void	init(IniFile ini, String serverName, boolean verbose) init should only be called once.
void	run() Used by ZBaseMultiThread.
protected BerString	Scan(DataDir dir) Z39.50 Scan request.
protected BerString	Sort(DataDir dir) Z39.50 Sort request.
protected void	Stop(DataDir dir) Z39.50 Trigger Resource Control request.

Methods inherited from class java.lang.Object

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

Field Detail

message

protected BerString message

Z39.50 request.

response

protected BerString response

Z39.50 response.

dataOut

protected DataOutputStream dataOut

Output stream for response.

lastNewSessionId

protected int lastNewSessionId

Last assigned session id. A traditional (connection-full) Z39.50 connection gets its session id from this. A connection-less Z39.50 connections gets its session id from the request.

holdConnection

protected boolean holdConnection

Flag to caller (ZBaseThread) that connection should be held open. This is set to true when the client is a traditional (connection-full) Z39.50 connection.

Constructor Detail

TransactionHandler

public TransactionHandler()

Just initialize the thread group. Used by ZBaseSingleThread.

Method Detail

getUserAccessClient

public static AccessClient getUserAccessClient(String sessionID)

init

public static void init(IniFile ini,
                        String serverName)

Invokes the init method with the input IniFile object, serverName and the verbose flag set to true.

Parameters:

ini - configuration file

name - section name for this thread

init

public static void init(IniFile ini,
                        String serverName,
                        boolean verbose)

init should only be called once. It sets some static variables and opens the databases.

Parameters:

ini - configuration file

name - section name for this thread

verbose - flag indicating whether the configuration information should be dumped to the server log.

run

public void run()

Used by ZBaseMultiThread. Handle the message and respond to dataOut.

Specified by:

run in interface Runnable

handle

public BerString handle(BerString message)

Handle the request. Invoke an action method based on the fldid of the request. Write a stats record if the stats object has been initialized.

Parameters:

message - the request

Returns:

the response

Init

protected BerString Init(DataDir dir)

Z39.50 Init request.

Parameters:

sessionId - the assigned session id

dir - the request

Returns:

the response

Sort

protected BerString Sort(DataDir dir)

Z39.50 Sort request.

Parameters:

dir - the request

Returns:

the response

Dedup

protected BerString Dedup(DataDir dir)

Z39.50 Dedup request.

Parameters:

dir - the request

Returns:

the response

Scan

protected BerString Scan(DataDir dir)

Z39.50 Scan request.

Parameters:

dir - the request

Returns:

the response

Display

protected BerString Display(DataDir dir)

Z39.50 Present request.

Parameters:

dir - the request

Returns:

the response

Find

protected BerString Find(DataDir dir)

Z39.50 Search request.

Parameters:

dir - the request

Returns:

the response

Delete

protected BerString Delete(DataDir dir)

Z39.50 Delete Hitlist request.

Parameters:

dir - the request

Returns:

the response

Close

protected BerString Close(DataDir dir)

Z39.50 Close request.

Parameters:

dir - the request

Returns:

the response

Extsvc

protected BerString Extsvc(DataDir dir)

Z39.50 Extended Services request.

AccessControl

protected BerString AccessControl(DataDir dir)

Z3950 AccessControl Response.

Stop

protected void Stop(DataDir dir)

Z39.50 Trigger Resource Control request.

Parameters:

dir - the request

Returns:

the response