在.net中,AggregateException类允许您抛出包含多个异常的异常.
例如,如果并行运行多个任务,那么您将要抛出一个AggregateException,其中一些任务失败,例外.
java有相当的类吗？
具体情况我想用它在：
public static void runMultipleThenJoin(Runnable... jobs) {
final List<Exception> errors = new Vector<Exception>();
try {
//create exception-handling thread jobs for each job
List<Thread> threads = new ArrayList<Thread>();
for (final Runnable job : jobs)
threads.add(new Thread(new Runnable() {public void run() {
try {
job.run();
} catch (Exception ex) {
errors.add(ex);
}
}}));
//start all
for (Thread t : threads)
t.start();
//join all
for (Thread t : threads)
t.join();
} catch (InterruptedException ex) {
//no way to recover from this situation
throw new RuntimeException(ex);
}
if (errors.size() > 0)
throw new AggregateException(errors);
}
解决方法
我不知道任何内置或图书馆类,因为我从来没有想要这样做(通常你只是链接异常),但写自己并不难.
您可能希望选择其中一个例外作为“主要”,因此可用于填充堆栈跟踪等.
public class AggregateException extends Exception {
private final Exception[] secondaryExceptions;
public AggregateException(String message,Exception primary,Exception... others) {
super(message,primary);
this.secondaryExceptions = others == null ? new Exception[0] : others;
}
public Throwable[] getAllExceptions() {
int start = 0;
int size = secondaryExceptions.length;
final Throwable primary = getCause();
if (primary != null) {
start = 1;
size++;
}
Throwable[] all = new Exception[size];
if (primary != null) {
all[0] = primary;
}
Arrays.fill(all,start,all.length,secondaryExceptions);
return all;
}
}
