LOGGER.entering(invocation);
try {
this.startBufferingCandidates.clear();
this.stopBufferingCandidates.clear();
this.startFilteringCandidates.clear();
for (StateMachineContext context : this.stateMachineContexts) {
final InvocationProcessingState state = context.getStateMachine().getState(invocation, mirrorWriter);
switch (state) {
case START_BUFFERING:
case RESTART_BUFFERING:
this.startBufferingCandidates.add(context);
if (state == START_BUFFERING) {
break;
}
case STOP_BUFFERING:
if (context.getBuffer() != null) {
this.stopBufferingCandidates.add(context);
}
break;
case START_FILTERING:
if (context.getBuffer() != null) {
this.startFilteringCandidates.add(context);
}
filteringCount++;
break;
case STOP_FILTERING:
filteringCount--;
break;
default:
break;
}
}
// filtered buffers
int firstFilteredBufferIndex = invocationBuffers.size();
for (StateMachineContext context : startFilteringCandidates) {
final InvocationBuffer buffer = context.getBuffer();
context.setBuffer(null);
int currentBufferIndex;
if ((currentBufferIndex = invocationBuffers.indexOf(buffer)) < firstFilteredBufferIndex) {
firstFilteredBufferIndex = currentBufferIndex;
}
}
while (invocationBuffers.size() > firstFilteredBufferIndex) {
final InvocationBuffer filteredBuffer = invocationBuffers.removeLast();
filteredBuffer.clear();
}
// stopped buffers
for (StateMachineContext context : stopBufferingCandidates) {
final InvocationBuffer buffer = context.getBuffer();
context.setBuffer(null);
if (buffer == null) {
continue;
}
final int newRefCount = buffer.removeReference();
if (newRefCount == 0) {
int bufferIndex;
if ((bufferIndex = invocationBuffers.indexOf(buffer)) != -1) {
invocationBuffers.remove(bufferIndex);
if (bufferIndex == 0) {
executeCommands(originalWriter, buffer);
} else {
invocationBuffers.get(bufferIndex - 1).getQueue().addAll(buffer.getQueue());
}
}
}
}
//started buffers (must be placed after stopped buffers so that restart buffering works properly)
if (filteringCount == 0 && startBufferingCandidates.size() > 0) {
final InvocationBuffer buffer = new InvocationBuffer(startBufferingCandidates.size());
invocationBuffers.addLast(buffer);
for (StateMachineContext context : startBufferingCandidates) {
context.setBuffer(buffer);
}
}
// start filtering if it is not active and should be
if (!doFiltering) {
doFiltering = filteringCount > 0;
}
// choose invocation target and execute invocation
XMLStreamWriter invocationTarget;
if (doFiltering) {
doFiltering = filteringCount > 0; // stop filtering for the next call if there are no more filtering requests active
invocationTarget = mirrorWriter;
} else {
if (invocationBuffers.isEmpty()) {
invocation.execute(mirrorWriter);
invocationTarget = originalWriter;
} else {
invocationBuffers.getLast().getQueue().offer(invocation);
invocationTarget = mirrorWriter;
}
}
return invocation.execute(invocationTarget);
} catch (IllegalArgumentException e) {
throw LOGGER.logSevereException(new InvocationProcessingException(invocation, e));
} catch (InvocationTargetException e) {
throw LOGGER.logSevereException(new InvocationProcessingException(invocation, e.getCause()));
} catch (IllegalAccessException e) {
throw LOGGER.logSevereException(new InvocationProcessingException(invocation, e));
} finally {
LOGGER.exiting();
}
