Apache Camel中的Bean是使用Simple Registry来管理的,当Bean被调用时,它的状态将会存储在Simple Registry中。然而,在特定的情况下,比如在多线程环境下,Bean的状态可能会丢失。这时可以通过以下方法解决:
public class MyBean {
private int count = 0;
public synchronized void incrementCount() {
count++;
}
}
public class MyProcessor implements Processor {
@Override
public void process(Exchange exchange) throws Exception {
int count = exchange.getIn().getHeader("count", Integer.class);
count++;
exchange.getIn().setHeader("count", count);
}
}
public class MyBean {
private static final ThreadLocal countThreadLocal = new ThreadLocal() {
@Override protected Integer initialValue() { return 0; }
};
public void incrementCount() {
int count = countThreadLocal.get();
count++;
countThreadLocal.set(count);
}
}