Java Reference
In-Depth Information
if (entryID < currentEntry)
restore(); // restores the last saved stable state
tracking # false ; // disables the tracking process
while (entryID > currentEntry){
Entry entry # (Entry) entryList.get(currentEntry);
Target target # (Trackable)
if (logicalRecording)
currentEntry !! ;
tracking # true ; // enables the tracking process
We need to test the logical recording functionalities in two scenarios: logical
recording of simple operations and logical recording of complex operations.
Figure 18.4 shows a snapshot of the puzzle application, where the tracking
console displays the sequence of simple operations performed on the three
instances of class Tower . The code below exemplifies logical recording of
pull() and push() methods invocation of class Tower .
package hanoi;
import recap.*;
public class Tower implements Trackable {
. . .
public Tower() { }
Figure 18.4 The Tower of Hanoi after the re-execution of simple operation push() .
Copyright © 2005 Sun Microsystems, Inc. All rights reserved. Reproduced by permission of Sun
Microsystems, Inc.
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