IDEMPIERE-175 Performance: Use atmosphere ( long pooling, NIO ) server push
This commit is contained in:
Heng Sin Low
parent
baada05fe5
commit
581f458ddf
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@ -1,26 +1,20 @@
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package fi.jawsy.jawwa.zk.atmosphere;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicReference;
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import org.atmosphere.cpr.AtmosphereResource;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.zkoss.lang.Library;
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import org.zkoss.util.logging.Log;
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import org.zkoss.zk.au.out.AuScript;
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import org.zkoss.zk.ui.Desktop;
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import org.zkoss.zk.ui.DesktopUnavailableException;
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import org.zkoss.zk.ui.Execution;
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import org.zkoss.zk.ui.Executions;
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import org.zkoss.zk.ui.UiException;
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import org.zkoss.zk.ui.event.Event;
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import org.zkoss.zk.ui.event.EventListener;
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import org.zkoss.zk.ui.impl.ExecutionCarryOver;
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import org.zkoss.zk.ui.sys.DesktopCtrl;
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import org.zkoss.zk.ui.sys.Scheduler;
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import org.zkoss.zk.ui.sys.ServerPush;
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import org.zkoss.zk.ui.util.Clients;
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import org.zkoss.zk.ui.util.Configuration;
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/**
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* ZK server push implementation based on Atmosphere.
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@ -29,318 +23,101 @@ import org.zkoss.zk.ui.util.Configuration;
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* (Executions.activate/deactivate) is attempted.
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*/
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public class AtmosphereServerPush implements ServerPush {
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private static final Log log = Log.lookup(AtmosphereServerPush.class);
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/** Denote a server-push thread gives up the activation (timeout). */
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private static final int GIVEUP = -99;
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private Desktop _desktop;
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/** List of ThreadInfo. */
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private final List<ThreadInfo> _pending = new LinkedList<ThreadInfo>();
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/** The active thread. */
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private ThreadInfo _active;
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/** The info to carray over from onPiggyback to the server-push thread. */
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private ExecutionCarryOver _carryOver;
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// private final int _min, _max, _factor;
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/** A mutex that is used by this object to wait for the server-push thread
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* to complete.
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*/
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private final Object _mutex = new Object();
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public static final int DEFAULT_TIMEOUT = 1000 * 60 * 5;
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private final AtomicReference<AtmosphereResource> resource = new AtomicReference<AtmosphereResource>();
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private final int timeout;
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public AtmosphereServerPush() {
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// this(-1, -1, -1);
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// }
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//
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// public AtmosphereServerPush(int min, int max, int factor) {
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// _min = min;
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// _max = max;
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// _factor = factor;
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String timeoutString = Library.getProperty("fi.jawsy.jawwa.zk.atmosphere.timeout");
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if (timeoutString == null || timeoutString.length() == 0) {
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public static final int DEFAULT_TIMEOUT = 1000 * 60 * 5;
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private final AtomicReference<Desktop> desktop = new AtomicReference<Desktop>();
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private final Logger log = LoggerFactory.getLogger(this.getClass());
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private final AtomicReference<AtmosphereResource> resource = new AtomicReference<AtmosphereResource>();
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private final int timeout;
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public AtmosphereServerPush() {
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String timeoutString = Library.getProperty("fi.jawsy.jawwa.zk.atmosphere.timeout");
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if (timeoutString == null || timeoutString.trim().length() == 0) {
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timeout = DEFAULT_TIMEOUT;
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} else {
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timeout = Integer.valueOf(timeoutString);
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}
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}
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protected void startClientPush() {
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// Clients.response("zk.clientpush", new AuScript(null, getStartScript()));
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Clients.response("jawwa.atmosphere.serverpush", new AuScript(null, getStartScript()));
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}
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protected void stopClientPush() {
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// Clients.response("zk.clientpush", new AuScript(null, getStopScript()));
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Clients.response("jawwa.atmosphere.serverpush", new AuScript(null, getStopScript()));
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}
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protected String getStartScript() {
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// final String start = _desktop.getWebApp().getConfiguration()
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// .getPreference("PollingServerPush.start", null);
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// if (start != null)
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// return start;
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//
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// final StringBuffer sb = new StringBuffer(128)
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// .append("zk.load('zk.cpsp');zk.afterLoad(function(){zk.cpsp.start('")
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// .append(_desktop.getId()).append('\'');
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//
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// final int min = _min > 0 ? _min: getIntPref("PollingServerPush.delay.min"),
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// max = _max > 0 ? _max: getIntPref("PollingServerPush.delay.max"),
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// factor = _factor > 0 ? _factor: getIntPref("PollingServerPush.delay.factor");
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// if (min > 0 || max > 0 || factor > 0)
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// sb.append(',').append(min).append(',').append(max)
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// .append(',').append(factor);
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//
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// return sb.append(");});").toString();
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int clientTimeout = timeout + 1000 * 60;
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return "jawwa.atmosphere.startServerPush('" + _desktop.getId() + "', " + clientTimeout + ");";
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}
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// private int getIntPref(String key) {
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// final String s = _desktop.getWebApp().getConfiguration()
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// .getPreference(key, null);
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// if (s != null) {
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// try {
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// return Integer.parseInt(s);
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// } catch (NumberFormatException ex) {
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// log.warning("Not a number specified at "+key);
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// }
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// }
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// return -1;
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// }
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protected String getStopScript() {
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// final String stop = _desktop.getWebApp().getConfiguration()
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// .getPreference("PollingServerPush.stop", null);
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// return stop != null ? stop:
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// "zk.cpsp.stop('" + _desktop.getId() + "');";
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return "jawwa.atmosphere.stopServerPush('" + _desktop.getId() + "');";
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}
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@Override
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public boolean isActive() {
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return _active != null && _active.nActive > 0;
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}
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@Override
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public void start(Desktop desktop) {
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if (_desktop != null) {
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log.warning("Ignored: Sever-push already started");
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return;
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}
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}
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_desktop = desktop;
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startClientPush();
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}
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@Override
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public void stop() {
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if (_desktop == null) {
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log.warning("Ignored: Sever-push not started");
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return;
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}
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final Execution exec = Executions.getCurrent();
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final boolean inexec = exec != null && exec.getDesktop() == _desktop;
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//it might be caused by DesktopCache expunge (when creating another desktop)
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try {
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if (inexec && _desktop.isAlive()) //Bug 1815480: don't send if timeout
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stopClientPush();
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commitResponse();
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} finally {
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_desktop = null; //to cause DesktopUnavailableException being thrown
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wakePending();
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//if inexec, either in working thread, or other event listener
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//if in working thread, we cannot notify here (too early to wake).
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//if other listener, no need notify (since onPiggyback not running)
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if (!inexec) {
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synchronized (_mutex) {
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_mutex.notify(); //wake up onPiggyback
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}
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}
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}
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}
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private void wakePending() {
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synchronized (_pending) {
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for (ThreadInfo info: _pending) {
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synchronized (info) {
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info.notify();
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}
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}
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_pending.clear();
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}
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}
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@Override
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public void onPiggyback() {
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final Configuration config = _desktop.getWebApp().getConfiguration();
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long tmexpired = 0;
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for (int cnt = 0; !_pending.isEmpty();) {
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//Don't hold the client too long.
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//In addition, an ill-written code might activate again
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//before onPiggyback returns. It causes dead-loop in this case.
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if (tmexpired == 0) { //first time
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tmexpired = System.currentTimeMillis()
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+ (config.getMaxProcessTime() >> 1);
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cnt = _pending.size() + 3;
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} else if (--cnt < 0 || System.currentTimeMillis() > tmexpired) {
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break;
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}
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final ThreadInfo info;
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synchronized (_pending) {
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if (_pending.isEmpty())
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return; //nothing to do
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info = _pending.remove(0);
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}
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//Note: we have to sync _mutex before info. Otherwise,
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//sync(info) might cause deactivate() to run before _mutex.wait
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synchronized (_mutex) {
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_carryOver = new ExecutionCarryOver(_desktop);
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synchronized (info) {
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if (info.nActive == GIVEUP)
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continue; //give up and try next
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info.nActive = 1; //granted
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info.notify();
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}
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if (_desktop == null) //just in case
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break;
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try {
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_mutex.wait(); //wait until the server push is done
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} catch (InterruptedException ex) {
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throw UiException.Aide.wrap(ex);
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}
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}
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}
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}
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@Override
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public <T extends Event>
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void schedule(EventListener<T> listener, T event, Scheduler<T> scheduler) {
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scheduler.schedule(listener, event); //delegate back
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commitResponse();
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}
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@Override
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public boolean activate(long timeout) throws InterruptedException, DesktopUnavailableException {
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final Thread curr = Thread.currentThread();
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if (_active != null && _active.thread.equals(curr)) { //re-activate
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++_active.nActive;
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return true;
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}
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final ThreadInfo info = new ThreadInfo(curr);
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synchronized (_pending) {
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if (_desktop != null)
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_pending.add(info);
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}
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boolean loop;
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do {
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loop = false;
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synchronized (info) {
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if (_desktop != null) {
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if (info.nActive == 0) //not granted yet
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info.wait(timeout <= 0 ? 10*60*1000: timeout);
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if (info.nActive <= 0) { //not granted
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boolean bTimeout = timeout > 0;
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boolean bDead = _desktop == null || !_desktop.isAlive();
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if (bTimeout || bDead) { //not timeout
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info.nActive = GIVEUP; //denote timeout (and give up)
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synchronized (_pending) { //undo pending
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_pending.remove(info);
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}
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if (bDead)
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throw new DesktopUnavailableException("Stopped");
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return false; //timeout
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}
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log.debug("Executions.activate() took more than 10 minutes");
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loop = true; //try again
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}
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}
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}
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} while (loop);
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if (_desktop == null)
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throw new DesktopUnavailableException("Stopped");
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_carryOver.carryOver();
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_active = info;
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return true;
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//Note: we don't mimic inEventListener since 1) ZK doesn't assume it
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//2) Window depends on it
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}
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@Override
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public boolean deactivate(boolean stop) {
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boolean stopped = false;
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if (_active != null &&
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Thread.currentThread().equals(_active.thread)) {
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if (--_active.nActive <= 0) {
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if (stop)
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stopClientPush();
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public boolean activate(long timeout) throws InterruptedException, DesktopUnavailableException {
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throw new UnsupportedOperationException("activate is not supported by AtmosphereServerPush");
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}
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_carryOver.cleanup();
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_carryOver = null;
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_active.nActive = 0; //just in case
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_active = null;
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if (stop) {
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wakePending();
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_desktop = null;
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stopped = true;
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}
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//wake up onPiggyback
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synchronized (_mutex) {
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_mutex.notify();
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}
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try {Thread.sleep(100);} catch (Throwable ex) {}
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//to minimize the chance that the server-push thread
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//activate again, before onPiggback polls next _pending
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}
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}
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return stopped;
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}
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public void clearResource(AtmosphereResource resource) {
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this.resource.compareAndSet(resource, null);
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}
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private void commitResponse() {
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AtmosphereResource resource = this.resource.getAndSet(null);
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AtmosphereResource resource = this.resource.getAndSet(null);
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if (resource != null) {
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resource.resume();
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}
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}
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@Override
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public boolean deactivate(boolean stop) {
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throw new UnsupportedOperationException("deactivate is not supported by AtmosphereServerPush");
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}
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@Override
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public boolean isActive() {
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// throw new UnsupportedOperationException("isActive is not supported by AtmosphereServerPush");
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return true;
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}
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@Override
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public void onPiggyback() {
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}
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@Override
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public <T extends Event> void schedule(EventListener<T> task, T event,
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Scheduler<T> scheduler) {
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scheduler.schedule(task, event);
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commitResponse();
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}
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@Override
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public void start(Desktop desktop) {
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Desktop oldDesktop = this.desktop.getAndSet(desktop);
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if (oldDesktop != null) {
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log.warn("Server push already started for desktop " + desktop.getId());
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return;
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}
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log.debug("Starting server push for " + desktop);
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int clientTimeout = timeout + 1000 * 60;
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Clients.response("jawwa.atmosphere.serverpush", new AuScript(null, "jawwa.atmosphere.startServerPush('" + desktop.getId() + "', " + clientTimeout
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+ ");"));
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}
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@Override
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public void stop() {
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Desktop desktop = this.desktop.getAndSet(null);
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if (desktop == null) {
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log.warn("Server push hasn't been started or has already stopped");
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return;
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}
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log.debug("Stopping server push for " + desktop);
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Clients.response("jawwa.atmosphere.serverpush", new AuScript(null, "jawwa.atmosphere.stopServerPush('" + desktop.getId() + "');"));
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commitResponse();
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}
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public void updateResource(AtmosphereResource resource) {
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commitResponse();
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boolean shouldSuspend = true;
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if (_desktop == null) {
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Desktop desktop = this.desktop.get();
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if (desktop == null) {
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return;
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}
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if (_desktop instanceof DesktopCtrl)
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{
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DesktopCtrl desktopCtrl = (DesktopCtrl) _desktop;
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shouldSuspend = !desktopCtrl.scheduledServerPush();
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if (desktop instanceof DesktopCtrl) {
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DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
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shouldSuspend = !desktopCtrl.scheduledServerPush();
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}
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if (shouldSuspend) {
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@ -350,17 +127,4 @@ public class AtmosphereServerPush implements ServerPush {
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this.resource.set(null);
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}
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}
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private static class ThreadInfo {
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private final Thread thread;
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/** # of activate() was called. */
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private int nActive;
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private ThreadInfo(Thread thread) {
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this.thread = thread;
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}
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public String toString() {
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return "[" + thread + ',' + nActive + ']';
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}
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}
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}
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@ -0,0 +1,19 @@
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package fi.jawsy.jawwa.zk.atmosphere;
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public class Either<L, R> {
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private L left;
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private R right;
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public Either(L l, R r) {
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left = l;
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right = r;
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}
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public L getLeftValue() {
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return left;
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}
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public R getRightValue() {
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return right;
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}
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}
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@ -2,6 +2,7 @@ package fi.jawsy.jawwa.zk.atmosphere;
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import java.io.IOException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.atmosphere.cpr.AtmosphereHandler;
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@ -11,110 +12,109 @@ import org.atmosphere.cpr.AtmosphereResourceEvent;
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import org.atmosphere.cpr.AtmosphereResponse;
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import org.zkoss.zk.ui.Desktop;
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import org.zkoss.zk.ui.Session;
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import org.zkoss.zk.ui.WebApp;
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import org.zkoss.zk.ui.http.WebManager;
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import org.zkoss.zk.ui.sys.DesktopCtrl;
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import org.zkoss.zk.ui.sys.ServerPush;
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import org.zkoss.zk.ui.sys.WebAppCtrl;
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/**
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* Atmosphere handler that integrates Atmosphere with ZK server push.
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*/
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public class ZkAtmosphereHandler implements AtmosphereHandler {
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private String err;
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private AtmosphereServerPush getServerPush(AtmosphereResource resource) {
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AtmosphereRequest request = resource.getRequest();
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Session session = WebManager.getSession(resource.getAtmosphereConfig().getServletContext(), request, false);
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if (session == null)
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{
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err = "Could not find session";
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return null;
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}
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else
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@Override
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public void destroy() {
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}
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private Either<String, Desktop> getDesktop(Session session, String dtid) {
|
||||
if (session.getWebApp() instanceof WebAppCtrl) {
|
||||
WebAppCtrl webAppCtrl = (WebAppCtrl) session.getWebApp();
|
||||
Desktop desktop = webAppCtrl.getDesktopCache(session).getDesktopIfAny(dtid);
|
||||
return new Either<String, Desktop>("Could not find desktop", desktop);
|
||||
}
|
||||
return new Either<String, Desktop>("Webapp does not implement WebAppCtrl", null);
|
||||
}
|
||||
|
||||
private Either<String, String> getDesktopId(HttpServletRequest request) {
|
||||
String dtid = request.getParameter("dtid");
|
||||
return new Either<String, String>(dtid, "Could not find desktop id");
|
||||
}
|
||||
|
||||
private Either<String, AtmosphereServerPush> getServerPush(AtmosphereResource resource) {
|
||||
AtmosphereRequest request = resource.getRequest();
|
||||
|
||||
Either<String, Session> sessionEither = getSession(resource, request);
|
||||
if (sessionEither.getRightValue() == null) {
|
||||
return new Either<String, AtmosphereServerPush>(sessionEither.getLeftValue(), null);
|
||||
}
|
||||
Session session = sessionEither.getRightValue();
|
||||
{
|
||||
String desktopId = request.getParameter("dtid");
|
||||
if (desktopId == null || desktopId.length() == 0)
|
||||
{
|
||||
err = "Could not find desktop id";
|
||||
return null;
|
||||
}
|
||||
|
||||
WebApp webApp = session.getWebApp();
|
||||
if (webApp instanceof WebAppCtrl)
|
||||
{
|
||||
WebAppCtrl webAppCtrl = (WebAppCtrl) webApp;
|
||||
Desktop desktop = webAppCtrl.getDesktopCache(session).getDesktopIfAny(desktopId);
|
||||
if (desktop == null)
|
||||
{
|
||||
err = "Could not find desktop";
|
||||
return null;
|
||||
}
|
||||
|
||||
if (desktop instanceof DesktopCtrl)
|
||||
{
|
||||
DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
|
||||
|
||||
ServerPush serverPush = desktopCtrl.getServerPush();
|
||||
if (serverPush == null)
|
||||
{
|
||||
err = "Server push is not enabled";
|
||||
return null;
|
||||
}
|
||||
|
||||
if (desktopCtrl.getServerPush() instanceof AtmosphereServerPush)
|
||||
{
|
||||
AtmosphereServerPush atmosphereServerPush = (AtmosphereServerPush) serverPush;
|
||||
if (atmosphereServerPush != null)
|
||||
return atmosphereServerPush;
|
||||
}
|
||||
|
||||
err = "Server push implementation is not AtmosphereServerPush";
|
||||
return null;
|
||||
}
|
||||
|
||||
err = "Desktop does not implement DesktopCtrl";
|
||||
return null;
|
||||
Either<String, String> dtidEither = getDesktopId(request);
|
||||
if (dtidEither.getLeftValue() == null || dtidEither.getLeftValue().trim().length() == 0) {
|
||||
return new Either<String, AtmosphereServerPush>(dtidEither.getRightValue(), null);
|
||||
}
|
||||
|
||||
String dtid = dtidEither.getLeftValue();
|
||||
{
|
||||
Either<String, Desktop> desktopEither = getDesktop(session, dtid);
|
||||
if (desktopEither.getRightValue() == null) {
|
||||
return new Either<String, AtmosphereServerPush> (desktopEither.getLeftValue(), null);
|
||||
}
|
||||
|
||||
Desktop desktop = desktopEither.getRightValue();
|
||||
return getServerPush(desktop);
|
||||
}
|
||||
|
||||
err = "Webapp does not implement WebAppCtrl";
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onRequest(AtmosphereResource resource) throws IOException {
|
||||
AtmosphereResponse response = resource.getResponse();
|
||||
|
||||
private Either<String, AtmosphereServerPush> getServerPush(Desktop desktop) {
|
||||
if (desktop instanceof DesktopCtrl) {
|
||||
DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
|
||||
if (desktopCtrl.getServerPush() == null)
|
||||
return new Either<String, AtmosphereServerPush>("Server push is not enabled", null);
|
||||
if (desktopCtrl.getServerPush() instanceof AtmosphereServerPush) {
|
||||
return new Either<String, AtmosphereServerPush>(null, (AtmosphereServerPush) desktopCtrl.getServerPush());
|
||||
}
|
||||
return new Either<String, AtmosphereServerPush>("Server push implementation is not AtmosphereServerPush", null);
|
||||
}
|
||||
return new Either<String, AtmosphereServerPush>("Desktop does not implement DesktopCtrl", null);
|
||||
}
|
||||
|
||||
private Either<String, Session> getSession(AtmosphereResource resource, HttpServletRequest request) {
|
||||
Session session = WebManager.getSession(resource.getAtmosphereConfig().getServletContext(), request, false);
|
||||
if (session == null)
|
||||
return new Either<String, Session>("Could not find session", null);
|
||||
else
|
||||
return new Either<String, Session>(null, session);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onRequest(AtmosphereResource resource) throws IOException {
|
||||
AtmosphereResponse response = resource.getResponse();
|
||||
|
||||
response.setContentType("text/plain");
|
||||
|
||||
AtmosphereServerPush serverPush = getServerPush(resource);
|
||||
if (serverPush == null)
|
||||
{
|
||||
Either<String, AtmosphereServerPush> serverPushEither = getServerPush(resource);
|
||||
String error = serverPushEither.getLeftValue();
|
||||
if (error != null && serverPushEither.getRightValue() == null) {
|
||||
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
|
||||
response.getWriter().write(err);
|
||||
return;
|
||||
response.getWriter().write(error);
|
||||
return;
|
||||
}
|
||||
|
||||
serverPush.updateResource(resource);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onStateChange(AtmosphereResourceEvent event) throws IOException {
|
||||
AtmosphereResource resource = event.getResource();
|
||||
AtmosphereServerPush serverPush = serverPushEither.getRightValue();
|
||||
serverPush.updateResource(resource);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onStateChange(AtmosphereResourceEvent event) throws IOException {
|
||||
AtmosphereResource resource = event.getResource();
|
||||
|
||||
if (event.isCancelled() || event.isResumedOnTimeout()) {
|
||||
AtmosphereServerPush serverPush = getServerPush(resource);
|
||||
if (serverPush != null)
|
||||
AtmosphereServerPush serverPush = getServerPush(resource).getRightValue();
|
||||
if (serverPush != null) {
|
||||
serverPush.clearResource(resource);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void destroy() {
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -38,6 +38,6 @@ Copyright (C) 2007 Ashley G Ramdass (ADempiere WebUI).
|
|||
<javascript src="/js/persist-min.js" charset="UTF-8"/>
|
||||
<javascript src="/js/token.js" charset="UTF-8"/>
|
||||
|
||||
<javascript package="jawwa.atmosphere" merge="true" />
|
||||
<javascript package="jawwa.atmosphere" merge="false" />
|
||||
|
||||
</language>
|
||||
|
|
|
|||
|
|
@ -47,9 +47,9 @@
|
|||
data: {
|
||||
dtid: this.desktop.id
|
||||
},
|
||||
accepts: "text/plain",
|
||||
dataType: "text/plain",
|
||||
dataType: "",
|
||||
timeout: me.timeout,
|
||||
transport : 'long-polling',
|
||||
error: function(jqxhr, textStatus, errorThrown) {
|
||||
me.failures += 1;
|
||||
me._schedule();
|
||||
|
|
|
|||
|
|
@ -1,6 +1,9 @@
|
|||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
|
||||
<display-name>ADempiere WebUI</display-name>
|
||||
<web-app id="iDempiere" xmlns="http://java.sun.com/xml/ns/javaee"
|
||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
|
||||
version="3.0">
|
||||
<display-name>iDempiere Web Client</display-name>
|
||||
|
||||
<servlet>
|
||||
<servlet-name>AtmosphereServlet</servlet-name>
|
||||
|
|
|
|||
Loading…
Reference in New Issue