Java utility class for doing in-VM thread dumps. Was useful for tracking down the cause of FCREPO-946.

ThreadDumper.java

import java.util.Map;                                                               
                                                                                    
/**                                                                                 
 * Static methods for dumping current thread names, states, and stack         
 * traces, in the context of the currently executing JVM.                                      
 */                                                                                 
public class ThreadDumper {                                                         
                                                                                    
    public static void dump(String name) {                                          
        dump(name, false);                                                          
    }                                                                               
                                                                                    
    public static void dump(String name, boolean stackTrace) {                      
        System.out.println("[Thread Dump " + name + "]");                           
        Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces();          
        for (Map.Entry<Thread, StackTraceElement[]> entry: map.entrySet()) {        
            Thread thread = entry.getKey();                                         
            System.out.println("  " + thread.getName() + " (" + thread.getState() + ")");
            if (stackTrace) {                                                       
                for (StackTraceElement e: entry.getValue()) {                       
                    System.out.println("    " + e.toString());                      
                }                                                                   
            }                                                                       
        }                                                                           
    }                                                                               
                                                                                    
}