IllegalStateException | Command Caching

Any command that extends CacheableCommand can be cached; in other words, both the TaskCommand and ControllerCommand can be cached.

IllegalStateException is thrown when a cached command cannot be serialized. This can happen if any of the variables/objects (class level) are not serializable.

sample command definition:
public class LearnerTestCmdImpl extends ControllerCommandImpl implements
        LearnerTestCmd {
   
    String name;

    MyBean bean;
         .................................
         .................................   

sample bean definition:
         public class MyBean {

 Let's say the command LearnerTestCmdImpl is cached but throws IllegalStateException while it is executed.

This can be resolved in two ways:
1. Make the object (Eg: MyBean Object in above sample) serializable
    i.e;
         public class MyBean implements Serializable {

2. Make the MyBean object transient variable in the command. But any variable/object defined as transient will not be a part of the cache content.
i.e;
public class LearnerTestCmdImpl extends ControllerCommandImpl implements
        LearnerTestCmd {
 
         String name;

         transient MyBean bean;
         .................................
         .................................