jpos.loader.simple.SimpleServiceConnection Maven / Gradle / Ivy
package jpos.loader.simple;
///////////////////////////////////////////////////////////////////////////////
//
// This software is provided "AS IS". The JavaPOS working group (including
// each of the Corporate members, contributors and individuals) MAKES NO
// REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE SOFTWARE,
// EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NON-INFRINGEMENT. The JavaPOS working group shall not be liable for
// any damages suffered as a result of using, modifying or distributing this
// software or its derivatives. Permission to use, copy, modify, and distribute
// the software and its documentation for any purpose is hereby granted.
//
// The JavaPOS Config/Loader (aka JCL) is now under the CPL license, which
// is an OSS Apache-like license. The complete license is located at:
// http://www.ibm.com/developerworks/library/os-cpl.html
//
///////////////////////////////////////////////////////////////////////////////
import java.util.*;
import java.lang.reflect.*;
import jpos.JposConst;
import jpos.JposException;
import jpos.loader.*;
import jpos.config.*;
import jpos.util.tracing.Tracer;
import jpos.util.tracing.TracerFactory;
/**
* This is a simple implementation of the JposServiceConnection interface
* @since 0.1 (Philly 99 meeting)
* @author E. Michael Maximilien ([email protected])
*/
public class SimpleServiceConnection extends Object
implements JposServiceConnection
{
/**
* Creates a new SimpleServiceConnection by passing the logicalName,
* the associated JposEntry and JposServiceInstanceFactory
* @param logicalName the logicalName for this connection
* @param entry the JposEntry matching this logicalName
* @param siFactoryClassName the class name implememting the
* JposServiceInstanceFactory interface
* @since 0.1 (Philly 99 meeting)
*/
SimpleServiceConnection( String logicalName, JposEntry entry,
String siFactoryClassName )
{
this.logicalName = logicalName;
this.entry = entry;
this.siFactoryClassName = siFactoryClassName;
}
/**
* @return the JposServiceInstance for this connection (it's null
* util a succesful connection)
* @since 0.1 (Philly 99 meeting)
*/
public JposServiceInstance getService() { return service; }
/**
* @return the logicalName of the JposServiceInstance of this connection
* @since 0.1 (Philly 99 meeting)
*/
public String getLogicalName() { return logicalName; }
/**
* Connects this service by trying to create the JposServiceInstance
* @since 0.1 (Philly 99 meeting)
* @throws jpos.JposException if the service throws a exception while
* disconnecting
*/
public void connect() throws JposException
{
try
{
Class[] parameterTypes = new Class[ 2 ];
parameterTypes[ 0 ] = Class.forName( "java.lang.String" );
parameterTypes[ 1 ] = Class.forName( "jpos.config.JposEntry");
JposServiceInstanceFactory siFactory = null;
if( siFactoryTable.containsKey( siFactoryClassName ) )
siFactory = (JposServiceInstanceFactory)siFactoryTable.
get( siFactoryClassName );
else
{
Class instanceClass = Class.forName( siFactoryClassName );
Constructor defaultCtor = instanceClass.
getConstructor( new Class[ 0 ] );
siFactory = (JposServiceInstanceFactory)defaultCtor.
newInstance( new Object[ 0 ] );
siFactoryTable.put( siFactoryClassName, siFactory );
}
service = (JposServiceInstance)siFactory.
createInstance( logicalName, entry );
}
catch( Exception e )
{
String msg = "Could not connect to service with logicalName = " +
logicalName + ": Exception.message=" + e.getMessage();
tracer.println( msg );
throw new JposException( JposConst.JPOS_E_NOSERVICE, msg, e );
}
}
/**
* Disconnect this connection
* @since 0.1 (Philly 99 meeting)
* @throws jpos.JposException if the service throws a exception while disconnecting
*/
public void disconnect() throws JposException
{
if( service != null )
{
service.deleteInstance();
service = null;
}
tracer.println( "Disconnected to service OK" );
}
/**
* Add a finalizer method in case the service connection is garbage collected
* and the service of this connection has not been disconnected
* @since 0.1 (Philly 99 meeting)
* @throws jpos.JposException if the service throws a exception while disconnecting
*/
protected void finalize() throws JposException { disconnect(); }
//---------------------------------------------------------------------------
// Class variables
//
private static Hashtable siFactoryTable = new Hashtable();
//--------------------------------------------------------------------------
// Instance variables
//
private JposServiceInstance service = null;
private JposEntry entry = null;
private String logicalName = null;
private String siFactoryClassName = null;
private Tracer tracer = TracerFactory.getInstance().
createTracer( "SimpleServiceConnection" );
}
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