/**
* Validates the option flags that each interceptor is using and reports an error if two
* interceptor share the same flag.
*
* @throws ChannelException Error with option flag
*/
protected void checkOptionFlags() throws ChannelException {
StringBuilder conflicts = new StringBuilder();
ChannelInterceptor first = interceptors;
while (first != null) {
int flag = first.getOptionFlag();
if (flag != 0) {
ChannelInterceptor next = first.getNext();
while (next != null) {
int nflag = next.getOptionFlag();
if (nflag != 0 && (((flag & nflag) == flag) || ((flag & nflag) == nflag))) {
conflicts.append("[");
conflicts.append(first.getClass().getName());
conflicts.append(":");
conflicts.append(flag);
conflicts.append(" == ");
conflicts.append(next.getClass().getName());
conflicts.append(":");
conflicts.append(nflag);
conflicts.append("] ");
} // end if
next = next.getNext();
} // while
} // end if
first = first.getNext();
} // while
if (conflicts.length() > 0)
throw new ChannelException(
sm.getString("groupChannel.optionFlag.conflict", conflicts.toString()));
}
@Override
public ChannelInterceptor next() {
ChannelInterceptor result = null;
if (hasNext()) {
result = start;
start = start.getNext();
}
return result;
}
/**
* Adds an interceptor to the stack for message processing<br>
* Interceptors are ordered in the way they are added.<br>
* <code>channel.addInterceptor(A);</code><br>
* <code>channel.addInterceptor(C);</code><br>
* <code>channel.addInterceptor(B);</code><br>
* Will result in a interceptor stack like this:<br>
* <code>A -> C -> B</code><br>
* The complete stack will look like this:<br>
* <code>Channel -> A -> C -> B -> ChannelCoordinator</code><br>
*
* @param interceptor ChannelInterceptorBase
*/
@Override
public void addInterceptor(ChannelInterceptor interceptor) {
if (interceptors == null) {
interceptors = interceptor;
interceptors.setNext(coordinator);
interceptors.setPrevious(null);
coordinator.setPrevious(interceptors);
} else {
ChannelInterceptor last = interceptors;
while (last.getNext() != coordinator) {
last = last.getNext();
}
last.setNext(interceptor);
interceptor.setNext(coordinator);
interceptor.setPrevious(last);
coordinator.setPrevious(interceptor);
}
}
@Override
public ChannelInterceptor next() {
try {
ChannelInterceptor result = null;
if (hasNextRemote()) {
result = start;
start = start.getNext();
}
return result;
} catch (Exception excp) {
excp.printStackTrace();
}
return null;
}