com.sun.grizzly.tcp.SuspendResponseUtils Maven / Gradle / Ivy
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package com.sun.grizzly.tcp;
import com.sun.grizzly.tcp.Response.ResponseAttachment;
import com.sun.grizzly.util.SelectionKeyAttachment;
import com.sun.grizzly.util.ThreadAttachment;
import com.sun.grizzly.util.WorkerThread;
import java.nio.channels.SelectionKey;
/**
* Utility class, which implements general response suspension functionality.
*
* @author Alexey Stashok
*/
public class SuspendResponseUtils {
private static final ThreadLocal SUSPENDED_IN_CURRENT_THREAD = new ThreadLocal();
private static final String SUSPENDED_RESPONSE_ATTR = "SuspendedResponse";
public static void attach(SelectionKey selectionKey,
Response.ResponseAttachment suspendedResponse) {
Object attachment = selectionKey.attachment();
if (attachment == null || !(attachment instanceof ThreadAttachment)) {
attachment = obtainThreadAttachment();
selectionKey.attach(attachment);
}
final ThreadAttachment threadAttachment = (ThreadAttachment) attachment;
suspendedResponse.setThreadAttachment(threadAttachment);
suspendedResponse.resetTimeout();
threadAttachment.setIdleTimeoutDelay(suspendedResponse.getIdleTimeoutDelay());
threadAttachment.setTimeoutListener(suspendedResponse);
threadAttachment.setKeySelectionListener(suspendedResponse);
threadAttachment.setAttribute(SUSPENDED_RESPONSE_ATTR, suspendedResponse);
}
public static void updateIdleTimeOutDelay(SelectionKey selectionKey,
Response.ResponseAttachment suspendedResponse) {
Object attachment = selectionKey.attachment();
if (attachment != null) {
suspendedResponse.resetTimeout();
final ThreadAttachment threadAttachment = (ThreadAttachment) attachment;
threadAttachment.setIdleTimeoutDelay(suspendedResponse.getIdleTimeoutDelay());
}
}
public static void detach(SelectionKey selectionKey) {
final Object attachment = selectionKey.attachment();
if (attachment != null && attachment instanceof ThreadAttachment) {
final ThreadAttachment threadAttachment = (ThreadAttachment) attachment;
threadAttachment.removeAttribute(SUSPENDED_RESPONSE_ATTR);
threadAttachment.setIdleTimeoutDelay(SelectionKeyAttachment.UNSET_TIMEOUT);
threadAttachment.setTimeoutListener(null);
threadAttachment.setKeySelectionListener(null);
}
}
public static Response.ResponseAttachment get(SelectionKey selectionKey) {
final Object attachment = selectionKey.attachment();
if (attachment != null && attachment instanceof ThreadAttachment) {
return (ResponseAttachment) ((ThreadAttachment) attachment).getAttribute(SUSPENDED_RESPONSE_ATTR);
}
return null;
}
private static ThreadAttachment obtainThreadAttachment() {
final Thread currentThread = Thread.currentThread();
if (currentThread instanceof WorkerThread) {
return ((WorkerThread) currentThread).getAttachment();
}
return new ThreadAttachment();
}
public static boolean isSuspendedInCurrentThread() {
return SUSPENDED_IN_CURRENT_THREAD.get() == Boolean.TRUE; // ThreadLocal can be null
}
public static void setSuspendedInCurrentThread() {
SUSPENDED_IN_CURRENT_THREAD.set(Boolean.TRUE);
}
public static boolean removeSuspendedInCurrentThread() {
final boolean result = SUSPENDED_IN_CURRENT_THREAD.get() == Boolean.TRUE;
SUSPENDED_IN_CURRENT_THREAD.remove();
return result;
}
}