Handle sessions in a custom package

You can extract a session using a session name from the SessionsMap. In the same package, you can use sessions to pass information between actions, but not to other packages.

Configure the following attributes

Apply an annotation to the class field and add a corresponding public setter.
Retrieve the SessionsMap using the Sessions attribute.
Set the variable type as Map<String, Object>.
Set the attributeType: TEXT or SESSION. If type = TEXT, it is a regular session; if type = SESSION, it is a sharedSession.

Start a new session

@BotCommand
@CommandPkg(label = "Start session", name = "startSession", description = "Start new session", 
icon = "pkg.svg", node_label = "start session {{sessionName}}|") public class Start {
 
    @Sessions
    private Map<String, Object> sessions;
     
    @Execute
    public void start(@Idx(index = "1", type = TEXT) @Pkg(label = "Session name", 
    default_value_type = STRING, default_value = "Default") @NotEmpty String sessionName) {
 
        // Check for existing session
        if (sessions.containsKey(sessionName))
            throw new BotCommandException(MESSAGES.getString("xml.SessionNameInUse", sessionName));
 
        // Do some operation
 
        // Create new session
        sessions.put(sessionName, new Session(operation));
    }
    public void setSessions(Map<String, Object> sessions) {
        this.sessions = sessions;
    }
}

End a session

@BotCommand
@CommandPkg(label = "End session", name = "endSession", description = "End session", icon = 
"pkg.svg", node_label = "End session {{sessionName}}|")
public class EndSession {
    @Sessions
    private Map<String, Object> sessions;
    @Execute
    public void end(
            @Idx(index = "1", type = TEXT) @Pkg(label = "Session name", default_value_type = STRING, 
            default_value = "Default") @NotEmpty String sessionName) {
                 
        sessions.remove(sessionName);   
    }  
    public void setSessions(Map<String, Object> sessions) {
        this.sessions = sessions;
    }
}

Add a session

In the below example, string objects are used (although in real actions, you can use complex objects).

@BotCommand
@CommandPkg(label = "[[SessionDemo.label]]", description = "[[SessionDemo.description]]", icon = "sample.svg", name = "sessionDemo")
public class SessionDemo {

	// Sessions are provided as a Map. Actions can add or remove entries in this
	// Map.
	// The choice to reuse/overwrite/delete/add any Object in this Map belongs to
	// the actions, and the framework makes no assumption regarding it.
	@Sessions
	private Map<String, Object> sessionMap;

	@Execute
	public void execute(@Idx(index = "1", type = TEXT)
	@Pkg(label = "[[SessionDemo.name.label]]")
	@NotEmpty
	String name) {
		if (!sessionMap.containsKey(name))
			sessionMap.put(name, "Some Value");
	}

	// Ensure that a public setter exists.
	public void setSessionMap(Map<String, Object> sessionMap) {
		this.sessionMap = sessionMap;
	}
}

Set a session variable

The below example shows how to develop an action (for example, Set session variable). In the action, the session details are retrieved and stored as a session variable so that the information can be used within a specific package.

@BotCommand
@CommandPkg(label = "[[SessionDemo2.label]]", description = "[[SessionDemo2.description]]", icon = "sample.svg", name = "SessionDemo2",
return_type = DataType.STRING)
public class SessionDemo2 {

	// Sessions are provided as a Map. Actions can add or remove entries in this
	// Map.
	// The choice to reuse/overwrite/delete/add any Object in this Map belongs to
	// the actions, and the framework makes no assumption regarding it.
	@Sessions
	private Map<String, Object> sessionMap;

	@Execute
	public Value<?> execute(@Idx(index = "1", type = TEXT)
	@Pkg(label = "[[SessionDemo2.name.label]]")
	@NotEmpty
	String name) {
		if (sessionMap.containsKey(name)) {
			return new StringValue(sessionMap.get(name));
		}	
		return new StringValue("session does not exist");
	}
	// Ensure that a public setter exists.
	public void setSessionMap(Map<String, Object> sessionMap) {
		this.sessionMap = sessionMap;
	}
}

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