@Override
protected void longPoll(SocketWrapper<NioChannel> socket, Processor<NioChannel> processor) {
if (processor.isAsync()) {
socket.setAsync(true);
} else {
// Either:
// - this is comet request
// - this is an upgraded connection
// - the request line/headers have not been completely
// read
socket.getSocket().getPoller().add(socket.getSocket());
}
}
@SuppressWarnings("deprecation") // Old HTTP upgrade method has been deprecated
public SocketState process(SocketWrapper<S> wrapper, SocketStatus status) {
if (wrapper == null) {
// Nothing to do. Socket has been closed.
return SocketState.CLOSED;
}
S socket = wrapper.getSocket();
if (socket == null) {
// Nothing to do. Socket has been closed.
return SocketState.CLOSED;
}
Processor<S> processor = connections.get(socket);
if (status == SocketStatus.DISCONNECT && processor == null) {
// Nothing to do. Endpoint requested a close and there is no
// longer a processor associated with this socket.
return SocketState.CLOSED;
}
wrapper.setAsync(false);
ContainerThreadMarker.markAsContainerThread();
try {
if (processor == null) {
processor = recycledProcessors.poll();
}
if (processor == null) {
processor = createProcessor();
}
initSsl(wrapper, processor);
SocketState state = SocketState.CLOSED;
do {
if (status == SocketStatus.CLOSE_NOW) {
processor.errorDispatch();
state = SocketState.CLOSED;
} else if (status == SocketStatus.DISCONNECT && !processor.isComet()) {
// Do nothing here, just wait for it to get recycled
// Don't do this for Comet we need to generate an end
// event (see BZ 54022)
} else if (processor.isAsync()) {
state = processor.asyncDispatch(status);
} else if (state == SocketState.ASYNC_END) {
state = processor.asyncDispatch(status);
// release() won't get called so in case this request
// takes a long time to process remove the socket from
// the waiting requests now else the async timeout will
// fire
getProtocol().endpoint.removeWaitingRequest(wrapper);
if (state == SocketState.OPEN) {
// There may be pipe-lined data to read. If the data
// isn't processed now, execution will exit this
// loop and call release() which will recycle the
// processor (and input buffer) deleting any
// pipe-lined data. To avoid this, process it now.
state = processor.process(wrapper);
}
} else if (processor.isComet()) {
state = processor.event(status);
} else if (processor.getUpgradeInbound() != null) {
state = processor.upgradeDispatch();
} else if (processor.isUpgrade()) {
state = processor.upgradeDispatch(status);
} else {
state = processor.process(wrapper);
}
if (state != SocketState.CLOSED && processor.isAsync()) {
state = processor.asyncPostProcess();
}
if (state == SocketState.UPGRADING) {
// Get the HTTP upgrade handler
HttpUpgradeHandler httpUpgradeHandler = processor.getHttpUpgradeHandler();
// Release the Http11 processor to be re-used
release(wrapper, processor, false, false);
// Create the upgrade processor
processor = createUpgradeProcessor(wrapper, httpUpgradeHandler);
// Mark the connection as upgraded
wrapper.setUpgraded(true);
// Associate with the processor with the connection
connections.put(socket, processor);
// Initialise the upgrade handler (which may trigger
// some IO using the new protocol which is why the lines
// above are necessary)
// This cast should be safe. If it fails the error
// handling for the surrounding try/catch will deal with
// it.
httpUpgradeHandler.init((WebConnection) processor);
} else if (state == SocketState.UPGRADING_TOMCAT) {
// Get the UpgradeInbound handler
org.apache.coyote.http11.upgrade.UpgradeInbound inbound = processor.getUpgradeInbound();
// Release the Http11 processor to be re-used
release(wrapper, processor, false, false);
// Create the light-weight upgrade processor
processor = createUpgradeProcessor(wrapper, inbound);
inbound.onUpgradeComplete();
}
if (getLog().isDebugEnabled()) {
getLog()
.debug(
"Socket: ["
+ wrapper
+ "], Status in: ["
+ status
+ "], State out: ["
+ state
+ "]");
}
} while (state == SocketState.ASYNC_END
|| state == SocketState.UPGRADING
|| state == SocketState.UPGRADING_TOMCAT);
if (state == SocketState.LONG) {
// In the middle of processing a request/response. Keep the
// socket associated with the processor. Exact requirements
// depend on type of long poll
connections.put(socket, processor);
longPoll(wrapper, processor);
} else if (state == SocketState.OPEN) {
// In keep-alive but between requests. OK to recycle
// processor. Continue to poll for the next request.
connections.remove(socket);
release(wrapper, processor, false, true);
} else if (state == SocketState.SENDFILE) {
// Sendfile in progress. If it fails, the socket will be
// closed. If it works, the socket will be re-added to the
// poller
connections.remove(socket);
release(wrapper, processor, false, false);
} else if (state == SocketState.UPGRADED) {
// Need to keep the connection associated with the processor
connections.put(socket, processor);
// Don't add sockets back to the poller if this was a
// non-blocking write otherwise the poller may trigger
// multiple read events which may lead to thread starvation
// in the connector. The write() method will add this socket
// to the poller if necessary.
if (status != SocketStatus.OPEN_WRITE) {
longPoll(wrapper, processor);
}
} else {
// Connection closed. OK to recycle the processor. Upgrade
// processors are not recycled.
connections.remove(socket);
if (processor.isUpgrade()) {
processor.getHttpUpgradeHandler().destroy();
} else if (processor instanceof org.apache.coyote.http11.upgrade.UpgradeProcessor) {
// NO-OP
} else {
release(wrapper, processor, true, false);
}
}
return state;
} catch (java.net.SocketException e) {
// SocketExceptions are normal
getLog().debug(sm.getString("abstractConnectionHandler.socketexception.debug"), e);
} catch (java.io.IOException e) {
// IOExceptions are normal
getLog().debug(sm.getString("abstractConnectionHandler.ioexception.debug"), e);
}
// Future developers: if you discover any other
// rare-but-nonfatal exceptions, catch them here, and log as
// above.
catch (Throwable e) {
ExceptionUtils.handleThrowable(e);
// any other exception or error is odd. Here we log it
// with "ERROR" level, so it will show up even on
// less-than-verbose logs.
getLog().error(sm.getString("abstractConnectionHandler.error"), e);
}
// Make sure socket/processor is removed from the list of current
// connections
connections.remove(socket);
// Don't try to add upgrade processors back into the pool
if (!(processor instanceof org.apache.coyote.http11.upgrade.UpgradeProcessor)
&& !processor.isUpgrade()) {
release(wrapper, processor, true, false);
}
return SocketState.CLOSED;
}