DO NOT REPLY [Bug 38986] - RequestProcessor does not need synchronization to get action from action map

[bugzilla]

DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG·
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=38986>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND·
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=38986





------- Additional Comments From [EMAIL PROTECTED]  2006-03-16 16:26 -------
Well System.out.println synchronizes writing to system’s output stream but 
not ‘put’ and ‘get’ methods that were outside of System.out.println method call.
Anyway, may be code below will help.
Instead of writing to System.out each thread has its own Baffer to collect test 
results. 
Writer starts reader thread after 10th Map entry, just to make sure that reader 
has something to read
Main thread sleeps for 10 seconds and displays results. 
You can also try it without any writing to console. 
After all - all what we looking for in this case is 
ConcurrentModificationException. 
-Regards
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

        public class SynchronizeDemo {
                public static Map actions = new HashMap();
                public static StringBuffer readOut = new StringBuffer();
                public static StringBuffer writeOut = new StringBuffer();

                public static void main(String[] args) throws 
InterruptedException {
                        SynchronizeDemo demo = new SynchronizeDemo();
                        demo.test(); 
                        Thread.sleep(10000); 
                        System.out.println("Result: " + writeOut.toString() + 
readOut.toString());
                }
                public void test() throws InterruptedException{
                        MapWriter writer = new MapWriter();
                        writer.start(); 
                }
                public class MapReader extends Thread{
                        public void run(){
                                for(int i = 0; i<250; i++){// read Map 250 times
                                        Set keys = actions.keySet(); 
                                        readOut.append("\n" + this.getClass
().getName());  
                                        for(int ii = 0; ii < keys.size(); ii++)
{//     display all actions from the map 
                                                readOut.append(" 
['_action_key_" + ii + "' mapped to '" + actions.get("_action_key_" + ii)
+"']");         
                                        }
                                }
                        }
                }
                public class MapWriter extends Thread{
                        public void run(){
                                synchronized(SynchronizeDemo.actions){
                                        for(int i = 0; i<250; i++){// put new 
action 250 times
                                                if(i==10){
                                                                MapReader 
reader = new MapReader();
                                                                reader.start();
                                                }
                                                actions.put("_action_key_" + 
i, "_action_class_" + i);
                                                writeOut.append("\n" + 
this.getClass().getName() + "'_action_key_" + i + "' '_action_class_" + i 
+ "'");         
                                        }
                                }
                        }
                }
        }


-- 
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]