synchronize

I have a class of common code that is thread safe. One of the methods in that class is abstract and needs to be overridden for different implementations. I need to ensure or at least flag to other developers that all implementations of this method need to be thread-safe. What is the best way to do this? Is there a keyword or annotation to this effect? I have already tried abstract synchronized but that combination of keywords is not allowed. You can't do it directly. One thing you can do is have the method be concrete, but invoke an abstract method: public synchronized final void foo() { doFoo

Closed . This question needs to be more focused. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it focuses on one problem only by editing this post . Want to synchronize the cache data between two servers. Both database is sharing the same database, but for better execution data i have cached the data into Hash Map at startup. Thus want to synchronize the cached data without restarting servers. (Both servers starts at same time). Please suggest me the best and efficient way to do. Instead of trying to synchronize the cached data

I am Java newbie (and RoR developer). I have a simple program. Ball is shared amont players. Ball should be passed to random Player. Ok here goes the code: class Ball { private int currentPlayer; public void setCurrentPlayer( int currentPlayer, int fromWho ) { this.currentPlayer = currentPlayer; System.out.println( "Ball:setCurrentPlayer " + fromWho + " ---> " + currentPlayer ); } public int getCurrentPlayer() { return currentPlayer; } } class Player implements Runnable { private int myID; private Ball ball; private int playersCount; java.util.Random rnd; public Player(int id, Ball ball, int

My app consist of the main-process and two threads, all running concurrently and making use of three fifo-queues: The fifo-q's are Qmain, Q1 and Q2. Internally the queues each use a counter that is incremented when an item is put into the queue, and decremented when an item is 'get'ed from the queue. The processing involve two threads, QMaster, which get from Q1 and Q2, and put into Qmain, Monitor, which put into Q2, and the main process, which get from Qmain and put into Q1. The QMaster-thread loop consecutively checks the counts of Q1 and Q2 and if any items are in the q's, it get's them and

I tried following the advice from this post Synchronise ScrollView scroll positions - android but running into a problem. Background - I want a table layout with both horizontal and vertical scrolling, but I want the first row and first column always present - like freeze pane with excel. Unfortunately it seems that is close to impossible with Android java programming...causing me such a headache. I have it set up so that if I can just synchronize these two horizontalscrollviews then I will have the table working the way I want. I followed the advice from the posted link above and the problem

When creating a thread object, I want to call code from the application that needs to be synchronized. The problem is that I don't know how to call Synchronize for an application function with parameters. Say we have procedure ThreadObject.Execute; var val1,val2:integer; Star:string; begin Synchronize(funcyfunc); //how to pass val1,val2,star here? end; where funcyfunc is defined as follow procedure OtherClass.funcyfunc(param1,param2:integer;spok:string); begin letsCallFriends(spok,param1); letsCallFriends(spok,param2); end; now the odd solution to this would be to say in ThreadObject private

I have a an application that has 2 parts. A service which creates content. An application that uses the content Each of these run as different processes. The problem is that both of them share a database. And I frequently get database locked error, both when the service tries to write something and the UI is reading data. Also vice versa. How do go about this? The class used to access DB is a singleton class. But since both UI & the service are 2 different processes, there are 2 singletons I presume. So that doesn't help. Even synchronise won't help I suppose, since again because of 2