Example usage for com.google.common.util.concurrent ListenableScheduledFuture cancel

Introduction

In this page you can find the example usage for com.google.common.util.concurrent ListenableScheduledFuture cancel.

Prototype

boolean cancel(boolean mayInterruptIfRunning);

Source Link

Document

Attempts to cancel execution of this task.

Usage

From source file:org.onosproject.mlb.MastershipLoadBalancer.java

private void scheduleBalance() {
    if (isLeader.get() && nextTask.get() == null) {

        ListenableScheduledFuture task = executorService.schedule(mastershipAdminService::balanceRoles, 30,
                TimeUnit.SECONDS);
        task.addListener(() -> {/*from  w  ww.  ja  va2s.  com*/
            log.info("Completed balance roles");
            nextTask.set(null);
        }, MoreExecutors.directExecutor());
        if (!nextTask.compareAndSet(null, task)) {
            task.cancel(false);
        }
    }
}

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From source file:io.druid.server.lookup.cache.LookupCoordinatorManager.java

@LifecycleStop
public void stop() {
    synchronized (startStopSync) {
        if (!started) {
            LOG.warn("Not started, ignoring stop request");
            return;
        }/*w w w. ja va 2  s  .  c  om*/
        started = false;
        executorService.shutdownNow();
        final ListenableScheduledFuture backgroundManagerFuture = this.backgroundManagerFuture;
        this.backgroundManagerFuture = null;
        if (backgroundManagerFuture != null && !backgroundManagerFuture.cancel(true)) {
            LOG.warn("Background lookup manager thread could not be cancelled");
        }
        // NOTE: we can't un-watch the configuration key
        LOG.debug("Stopped");
    }
}

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From source file:org.opendaylight.sxp.core.SxpNode.java

/**
 * Sets SxpNode specific Timer/*from www.  ja v a  2  s . com*/
 *
 * @param timerType Type of Timer that will be set
 * @param timer     Timer logic
 * @return ListenableScheduledFuture callback
 */
private ListenableScheduledFuture<?> setTimer(TimerType timerType, ListenableScheduledFuture<?> timer) {
    ListenableScheduledFuture<?> t = this.timers.put(timerType, timer);
    if (t != null && !t.isDone()) {
        t.cancel(false);
    }
    return timer;
}

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From source file:org.neoscoinj.core.PeerGroup.java

@SuppressWarnings("NonAtomicOperationOnVolatileField")
private void setupPinging() {
    if (getPingIntervalMsec() <= 0)
        return; // Disabled.

    vPingTask = executor.scheduleAtFixedRate(new Runnable() {
        @Override//  w w w  .  j  av a 2s.  co m
        public void run() {
            try {
                if (getPingIntervalMsec() <= 0) {
                    ListenableScheduledFuture<?> task = vPingTask;
                    if (task != null) {
                        task.cancel(false);
                        vPingTask = null;
                    }
                    return; // Disabled.
                }
                for (Peer peer : getConnectedPeers()) {
                    if (peer.getPeerVersionMessage().clientVersion < Pong.MIN_PROTOCOL_VERSION)
                        continue;
                    peer.ping();
                }
            } catch (Throwable e) {
                log.error("Exception in ping loop", e); // The executor swallows exceptions :(
            }
        }
    }, getPingIntervalMsec(), getPingIntervalMsec(), TimeUnit.MILLISECONDS);
}

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From source file:org.bitcoinj_extra.core.PeerGroup.java

/**
 * Sets the period between pings for an individual peer. Setting this lower means more accurate and timely ping
 * times are available via {@link org.bitcoinj_extra.core.Peer#getLastPingTime()} but it increases load on the
 * remote node. It defaults to {@link PeerGroup#DEFAULT_PING_INTERVAL_MSEC}.
 * Setting the value to be <= 0 disables pinging entirely, although you can still request one yourself
 * using {@link org.bitcoinj_extra.core.Peer#ping()}.
 *///www  .  java  2 s. c om
public void setPingIntervalMsec(long pingIntervalMsec) {
    lock.lock();
    try {
        this.pingIntervalMsec = pingIntervalMsec;
        ListenableScheduledFuture<?> task = vPingTask;
        if (task != null)
            task.cancel(false);
        setupPinging();
    } finally {
        lock.unlock();
    }
}

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From source file:org.bitcoinj_extra.core.PeerGroup.java

@SuppressWarnings("NonAtomicOperationOnVolatileField")
private void setupPinging() {
    if (getPingIntervalMsec() <= 0)
        return; // Disabled.

    vPingTask = executor.scheduleAtFixedRate(new Runnable() {
        @Override//  w  ww .  j  ava2  s .com
        public void run() {
            try {
                if (getPingIntervalMsec() <= 0) {
                    ListenableScheduledFuture<?> task = vPingTask;
                    if (task != null) {
                        task.cancel(false);
                        vPingTask = null;
                    }
                    return; // Disabled.
                }
                for (Peer peer : getConnectedPeers()) {
                    if (peer.getPeerVersionMessage().clientVersion < params
                            .getProtocolVersionNum(NetworkParameters.ProtocolVersion.PONG))
                        continue;
                    peer.ping();
                }
            } catch (Throwable e) {
                log.error("Exception in ping loop", e); // The executor swallows exceptions :(
            }
        }
    }, getPingIntervalMsec(), getPingIntervalMsec(), TimeUnit.MILLISECONDS);
}

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