Example usage for java.util.concurrent.atomic AtomicLong get

List of usage examples for java.util.concurrent.atomic AtomicLong get

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Introduction

In this page you can find the example usage for java.util.concurrent.atomic AtomicLong get.

Prototype

public final long get()

Source Link

Document

Returns the current value, with memory effects as specified by VarHandle#getVolatile .

Usage

From source file:org.structr.core.graph.NodeServiceCommand.java

/**
 * Executes the given transaction until the stop condition evaluates to
 * <b>true</b>./*from www. j  ava2  s  .  c  o  m*/
 *
 * @param securityContext
 * @param commitCount the number of executions after which the transaction is committed
 * @param transaction the operation to execute
 * @param stopCondition
 * @throws FrameworkException
 */
public static void bulkTransaction(final SecurityContext securityContext, final long commitCount,
        final StructrTransaction transaction, final Predicate<Long> stopCondition) throws FrameworkException {

    final App app = StructrApp.getInstance(securityContext);
    final AtomicLong objectCount = new AtomicLong(0L);

    while (!stopCondition.evaluate(securityContext, objectCount.get())) {

        try (final Tx tx = app.tx()) {

            long loopCount = 0;

            while (loopCount++ < commitCount && !stopCondition.evaluate(securityContext, objectCount.get())) {

                transaction.execute();
                objectCount.incrementAndGet();
            }

            tx.success();
        }
    }
}

From source file:org.apache.eagle.alert.engine.e2e.SampleClient2.java

private static Pair<Long, String> createFailureEntity(AtomicLong base, int hostIndex) {
    // TODO: add randomization
    IfEntity ie = new IfEntity();
    ie.host = "boot-vm-0-" + hostIndex + ".datacenter.corp.com";
    ie.instanceUuid = nextUuid;//from   w w  w  .ja  v  a2  s .c o  m
    ie.message = "boot failure for when try start the given vm!";
    ie.reqId = nextReqId;
    ie.timestamp = base.get();

    base.addAndGet(2000);// simply some interval.
    return Pair.of(base.get(), JsonUtils.writeValueAsString(ie));
}

From source file:org.springframework.http.server.reactive.AbstractRequestBodyPublisher.java

/**
 * Concurrent substraction bound to 0 and Long.MAX_VALUE.
 * Any concurrent write will "happen" before this operation.
 *
 * @param sequence current atomic to update
 * @param toSub    delta to sub//w ww . ja v  a 2  s. c  om
 * @return value before subscription, 0 or Long.MAX_VALUE
 */
private static long getAndSub(AtomicLong sequence, long toSub) {
    long r;
    long u;
    do {
        r = sequence.get();
        if (r == 0 || r == Long.MAX_VALUE) {
            return r;
        }
        u = Operators.subOrZero(r, toSub);
    } while (!sequence.compareAndSet(r, u));

    return r;
}

From source file:com.icloud.framework.core.util.FBUtilities.java

public static void atomicSetMax(AtomicLong atomic, long i) {
    while (true) {
        long j = atomic.get();
        if (j >= i || atomic.compareAndSet(j, i))
            break;
    }/*from  w w w .ja  v  a  2  s  .  c om*/
}

From source file:eu.eubrazilcc.lvl.service.rest.TaskResource.java

private static Runnable checkTaskProgress(final EventOutput eventOutput, final AtomicLong eventId,
        final CancellableTask<?> task) {
    return new Runnable() {
        @Override/*w w w.  ja va  2 s.  c o m*/
        public void run() {
            try {
                eventOutput
                        .write(new OutboundEvent.Builder().name(PROGRESS_EVENT).id(Long.toString(eventId.get()))
                                .data(String.class,
                                        JSON_MAPPER.writeValueAsString(Progress.builder().done(task.isDone())
                                                .progress(task.getProgress()).status(task.getStatus())
                                                .hasErrors(task.hasErrors()).build()))
                                .build());
            } catch (IOException e) {
                throw new RuntimeException("Error when writing the event", e);
            }
        }
    };
}

From source file:com.alibaba.rocketmq.common.MixAll.java

public static boolean compareAndIncreaseOnly(final AtomicLong target, final long value) {
    long prev = target.get();
    while (value > prev) {
        boolean updated = target.compareAndSet(prev, value);
        if (updated)
            return true;

        prev = target.get();//from  w  w w  .j  a va 2s. com
    }

    return false;
}

From source file:com.nextdoor.bender.handler.BaseHandler.java

private static void updateOldest(AtomicLong max, long time) {
    while (true) {
        long curMax = max.get();

        /*//from ww  w  .  j  a va 2  s .  c  o  m
         * With time smaller value is older
         */
        if (curMax <= time) {
            return;
        }

        if (max.compareAndSet(curMax, time)) {
            return;
        }
    }
}

From source file:ubicrypt.core.Utils.java

private static void read(final AtomicLong pos, final ByteBuffer buffer, final AsynchronousFileChannel channel,
        final Subscriber<? super byte[]> subscriber) {
    channel.read(buffer, pos.get(), pos, new CompletionHandler<Integer, AtomicLong>() {
        @Override/*from  ww w . ja va 2  s.c o  m*/
        public void completed(final Integer result, final AtomicLong attachment) {
            if (result == -1) {
                subscriber.onCompleted();
                return;
            }
            subscriber.onNext(buffer.array());
            if (result < 1 << 16) {
                subscriber.onCompleted();
                return;
            }
            pos.addAndGet(result);
            read(pos, ByteBuffer.allocate(1 << 16), channel, subscriber);
        }

        @Override
        public void failed(final Throwable exc, final AtomicLong attachment) {
            subscriber.onError(exc);
        }
    });
}

From source file:org.apache.eagle.alert.engine.e2e.SampleClient2.java

private static Pair<Long, String> createLogEntity(AtomicLong base1, int hostIndex) {
    // TODO: add randomization
    LogEntity le = new LogEntity();
    if (hostIndex < 3) {
        le.component = "NOVA";
        le.host = "nova.000-" + hostIndex + ".datacenter.corp.com";
        le.message = "RabbitMQ Exception - MQ not connectable!";
    } else {/*from ww  w  .  j a  va 2  s  .c  o  m*/
        le.component = "NEUTRON";
        le.host = "neturon.000-" + (hostIndex - 3) + ".datacenter.corp.com";
        le.message = "DNS Exception - Fail to connect to DNS!";
    }
    le.instanceUuid = nextUuid;
    le.logLevel = "ERROR";
    le.reqId = nextReqId;
    le.timestamp = base1.get();

    base1.addAndGet(1000);// simply some interval.
    return Pair.of(base1.get(), JsonUtils.writeValueAsString(le));
}

From source file:net.dv8tion.jda.core.utils.PermissionUtil.java

/**
 * Gets the {@code long} representation of the effective permissions allowed for this {@link net.dv8tion.jda.core.entities.Member Member}
 * in this {@link net.dv8tion.jda.core.entities.Channel Channel}. This can be used in conjunction with
 * {@link net.dv8tion.jda.core.Permission#getPermissions(long) Permission.getPermissions(long)} to easily get a list of all
 * {@link net.dv8tion.jda.core.Permission Permissions} that this member can use in this {@link net.dv8tion.jda.core.entities.Channel Channel}.
 * <br>This functions very similarly to how {@link net.dv8tion.jda.core.entities.Role#getPermissionsRaw() Role.getPermissionsRaw()}.
 *
 * @param  channel/*www.j a  v  a  2  s  . c o  m*/
 *         The {@link net.dv8tion.jda.core.entities.Channel Channel} being checked.
 * @param  member
 *         The {@link net.dv8tion.jda.core.entities.Member Member} whose permissions are being checked.
 *
 * @throws IllegalArgumentException
 *         if any of the provided parameters is {@code null}
 *         or the provided entities are not from the same guild
 *
 * @return The {@code long} representation of the effective permissions that this {@link net.dv8tion.jda.core.entities.Member Member}
 *         has in this {@link net.dv8tion.jda.core.entities.Channel Channel}.
 */
public static long getEffectivePermission(Channel channel, Member member) {
    Checks.notNull(channel, "Channel");
    Checks.notNull(member, "Member");

    Checks.check(channel.getGuild().equals(member.getGuild()),
            "Provided channel and provided member are not of the same guild!");

    if (member.isOwner()) {
        // Owner effectively has all permissions
        return Permission.ALL_PERMISSIONS;
    }

    long permission = getEffectivePermission(member);
    final long admin = Permission.ADMINISTRATOR.getRawValue();
    if (isApplied(permission, admin))
        return Permission.ALL_PERMISSIONS;

    AtomicLong allow = new AtomicLong(0);
    AtomicLong deny = new AtomicLong(0);
    getExplicitOverrides(channel, member, allow, deny);
    permission = apply(permission, allow.get(), deny.get());
    final long viewChannel = Permission.VIEW_CHANNEL.getRawValue();

    //When the permission to view the channel is not applied it is not granted
    // This means that we have no access to this channel at all
    return isApplied(permission, viewChannel) ? permission : 0;
    /*
    // currently discord doesn't implicitly grant permissions that the user can grant others
    // so instead the user has to explicitly make an override to grant them the permission in order to be granted that permission
    // yes this makes no sense but what can i do, the devs don't like changing things apparently...
    // I've been told half a year ago this would be changed but nothing happens
    // so instead I'll just bend over for them so people get "correct" permission checks...
    //
    // only time will tell if something happens and I can finally re-implement this section wew
    final long managePerms = Permission.MANAGE_PERMISSIONS.getRawValue();
    final long manageChannel = Permission.MANAGE_CHANNEL.getRawValue();
    if ((permission & (managePerms | manageChannel)) != 0)
    {
    // In channels, MANAGE_CHANNEL and MANAGE_PERMISSIONS grant full text/voice permissions
    permission |= Permission.ALL_TEXT_PERMISSIONS | Permission.ALL_VOICE_PERMISSIONS;
    }
    */
}