Easy-Java-Events
EJE provides accessible methods for handling events/actions/listeners. Add this as dependency to your project via Maven/Gradle/Sbt/Leinigen (requires Java 8 or higher).
{ System.out.println("New value: "+value+" bye!"); }, Exception::printStackTrace); onValueChanged.execute(7); // Prints out "New value: 7" and "New value: 7 bye!" // If more and more actions get added over time // you must remove unused actions. There are some util methods for this case. // First we create a new action with additional params: isOneTime=false and object=null. Action
actionToRemove = onValueChanged.addAction(value -> { System.out.println("New value: "+value+", but I will be gone soon :/"); }, Exception::printStackTrace, false, null); // Then we initialise the cleaner thread for this event, which checks // its actions list every second for actions that // fulfill the condition "object != null" and removes those. onValueChanged.initCleaner(1000, object -> object != null, Exception::printStackTrace); // Once we want to remove the action, we simply give it an object that is not null. // The cleaner then removes it in the next check. actionToRemove.object = new Object(); // Note that you can store any type of object here.">
Event<Integer> onValueChanged = new Event<>(); onValueChanged.addAction(value -> { // Stays in memory and gets executed every time. System.out.println("New value: "+value); // You can throw exceptions in here }, Exception::printStackTrace); // and catch them here. onValueChanged.execute(10); // Prints out "New value: 10" onValueChanged.execute(5); // Prints out "New value: 5" // One time actions that only get executed once, are also supported: onValueChanged.addOneTimeAction(value -> { System.out.println("New value: "+value+" bye!"); }, Exception::printStackTrace); onValueChanged.execute(7); // Prints out "New value: 7" and "New value: 7 bye!" // If more and more actions get added over time // you must remove unused actions. There are some util methods for this case. // First we create a new action with additional params: isOneTime=false and object=null. Action<Integer> actionToRemove = onValueChanged.addAction(value -> { System.out.println("New value: "+value+", but I will be gone soon :/"); }, Exception::printStackTrace, false, null); // Then we initialise the cleaner thread for this event, which checks // its actions list every second for actions that // fulfill the condition "object != null" and removes those. onValueChanged.initCleaner(1000, object -> object != null, Exception::printStackTrace); // Once we want to remove the action, we simply give it an object that is not null. // The cleaner then removes it in the next check. actionToRemove.object = new Object(); // Note that you can store any type of object here.
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