Java Doc for Heartbeat.java in  » Web-Framework » Tapestry » org » apache » tapestry » services » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » Tapestry » org.apache.tapestry.services 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.tapestry.services.Heartbeat

All known Subclasses:   org.apache.tapestry.internal.services.HeartbeatImpl,
Heartbeat
public interface Heartbeat (Code)
Allow for deferred execution of logic, useful when trying to get multiple components to coordinate behavior. A component may add a command to be executed " Heartbeat.end() at the end of the heartbeat ". The classic example of this is a Label and the field it labels; since we don't know which order the two will render, we can't tell if the field's id is correct until after both have rendered.




Method Summary
 voidbegin()
     Begins a new Heartbeat.
 voiddefer(Runnable command)
     Adds a new command to the current Heartbeat.
 voidend()
     Executes all commands since the most recent Heartbeat.begin() .



Method Detail
begin
void begin()(Code)
Begins a new Heartbeat. Heartbeats nest. Every call to begin() should be matched by a call to Heartbeat.end() .



defer
void defer(Runnable command)(Code)
Adds a new command to the current Heartbeat. The command will be executed by Heartbeat.end() .
Parameters:
  command - command to be executed at the end of the heartbeat



end
void end()(Code)
Executes all commands since the most recent Heartbeat.begin() .



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