Example usage for java.util.concurrent.locks Lock lock

Introduction

In this page you can find the example usage for java.util.concurrent.locks Lock lock.

Prototype

lock

Source Link

Usage

From source file:com.alibaba.shared.django.DjangoClient.java

public String accessToken() {
    Lock rl = lock.readLock();
    rl.lock(); // Waiting for refresh!
    try {/*from  www . j a v a  2s  .c  om*/
        if (accessToken != null) {
            return accessToken;
        }
    } finally {
        rl.unlock();
    }
    if (accessToken == null) {
        try {
            refreshToken();
        } catch (URISyntaxException e) {
            LOGGER.error("refreshTokenError", e);
        } catch (IOException e) {
            LOGGER.error("refreshTokenError", e);
        }
    }
    return accessToken;
}

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From source file:net.gbmb.collector.RecordController.java

private Collection registerCollection(Application application, String cid, String mode)
        throws CollectionStateException {
    boolean isTest = TEST_KEY.equals(mode);
    Lock lock = hazelcast.getLock(cid);
    lock.lock();
    try {//from   w w  w  .  j  av  a  2  s.  c o m
        if (collectionRepository.findByCollectionId(cid) != null) {
            // collection already existing
            throw new CollectionStateException(String.format("Collection already existing: %s", cid));
        }
        Collection collection = new Collection(cid);
        collection.setCreationDate(new Date());
        collection.setState(CollectionState.COLLECTING);
        collection.setCancelable(application.getCancelableCollection());
        collection.setTestMode(isTest);
        if (collectionMap.putIfAbsent(cid, collection) == null) {
            // no previous record
            return collection;
        } else {
            // already existing
            throw new CollectionStateException("Already existising: " + cid);
        }
    } finally {
        lock.unlock();
    }
}

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From source file:com.alibaba.shared.django.DjangoClient.java

protected void refreshToken() throws URISyntaxException, IOException {
    Lock wl = lock.writeLock();
    wl.lock();
    try {//from   w ww  .  jav a2 s . c  o  m
        final String timestamp = String.valueOf(new Date().getTime());
        DjangoMessage msg = executeRequest(new Supplier<HttpUriRequest>() {
            public HttpUriRequest get() {
                Map<String, String> params = Maps.newHashMap();
                params.put("appKey", appKey);
                params.put("timestamp", timestamp);
                params.put("signature", buildSignature(timestamp));
                return new HttpGet(buildURI(tokenUrl, params, false));
            }
        }, false);
        if (msg != null && msg.isSuccess()) {
            accessToken = msg.getString(ACCESS_TOKEN_KEY);
            LOGGER.info("Received accessToken {}", accessToken);
        }
    } finally {
        wl.unlock();
    }
}

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From source file:org.apache.rave.opensocial.service.impl.DefaultAppDataService.java

/**
 * Deletes data for the specified user and group.
 *
 * @param userId  The user/*from w  ww  . j  ava  2  s  .  c om*/
 * @param groupId The group
 * @param appId   The application ID
 * @param fields  The fields to delete - empty set implies all fields
 * @param token   The security token
 * @return an error if one occurs
 */
@Override
public Future<Void> deletePersonData(UserId userId, GroupId groupId, String appId, Set<String> fields,
        SecurityToken token) throws ProtocolException {
    //make sure the request conforms to the OpenSocial visibility rules
    String personId = validateWriteRequest(userId, groupId, appId, token);

    //lock on this user and this application to avoid any potential concurrency issues
    Lock lock = getApplicationDataLock(personId, appId);
    try {
        lock.lock();

        //get the application data for this user and application
        ApplicationData applicationData = applicationDataRepository.getApplicationData(personId, appId);

        //if there is no data, there's nothing to delete, so we're done...
        if (applicationData == null || applicationData.getData() == null) {
            return Futures.immediateFuture(null);
        }

        //remove the fields specified -- empty field set implies remove all, otherwise remove just the fields specified
        Map<String, Object> data = applicationData.getData();
        if (fields == null || fields.size() == 0) {
            data.clear();
        } else {
            data.keySet().removeAll(fields);
        }

        //save our changes and return
        applicationDataRepository.save(applicationData);
    } finally {
        lock.unlock();
        lockService.returnLock(lock);
    }
    return Futures.immediateFuture(null);
}

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From source file:org.mule.service.oauth.internal.AbstractOAuthDancer.java

/**
 * Updates the resource owner oauth context information
 *
 * @param resourceOwnerOAuthContext//  w  ww  .  j a va 2s .  c  om
 */
protected void updateResourceOwnerOAuthContext(DefaultResourceOwnerOAuthContext resourceOwnerOAuthContext) {
    final Lock resourceOwnerContextLock = resourceOwnerOAuthContext.getRefreshUserOAuthContextLock();
    resourceOwnerContextLock.lock();
    try {
        tokensStore.put(resourceOwnerIdTransformer.apply(resourceOwnerOAuthContext.getResourceOwnerId()),
                resourceOwnerOAuthContext);
    } finally {
        resourceOwnerContextLock.unlock();
    }
}

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From source file:org.eclipse.gyrex.monitoring.metrics.BaseMetric.java

/**
 * Returns a map of attribute values contained in the metric.
 * <p>//from   w  w w.ja  va 2s. c o m
 * Although public this method must not be called by clients. The framework
 * uses this method to obtain further information about a metric for
 * processing purposes.
 * </p>
 * 
 * @return an unmodifiable map of metric attribute values
 * @noreference This method is not intended to be referenced by clients.
 */
public final Map<String, ?> getAttributeValues() {
    final Map<String, Object> attributeValues = new HashMap<String, Object>();
    final Lock lock = getReadLock();
    lock.lock();
    try {
        populateAttributeValues(attributeValues);
    } finally {
        lock.unlock();
    }
    return Collections.unmodifiableMap(attributeValues);
}

---

From source file:org.mule.service.oauth.internal.AbstractOAuthDancer.java

/**
 * Retrieves the oauth context for a particular user. If there's no state for that user a new state is retrieve so never returns
 * null.//from   ww  w .j  ava 2 s .c  o  m
 *
 * @param resourceOwnerId id of the user.
 * @return oauth state
 */
public ResourceOwnerOAuthContext getContextForResourceOwner(String resourceOwnerId) {
    if (resourceOwnerId == null) {
        resourceOwnerId = DEFAULT_RESOURCE_OWNER_ID;
    }

    final String transformedResourceOwnerId = resourceOwnerIdTransformer.apply(resourceOwnerId);

    DefaultResourceOwnerOAuthContext resourceOwnerOAuthContext = null;
    if (!tokensStore.containsKey(transformedResourceOwnerId)) {
        final Lock lock = lockProvider.createLock(toString() + "-config-oauth-context");
        lock.lock();
        try {
            if (!tokensStore.containsKey(transformedResourceOwnerId)) {
                resourceOwnerOAuthContext = new DefaultResourceOwnerOAuthContext(
                        createLockForResourceOwner(transformedResourceOwnerId), resourceOwnerId);
                tokensStore.put(transformedResourceOwnerId, resourceOwnerOAuthContext);
            }
        } finally {
            lock.unlock();
        }
    }
    if (resourceOwnerOAuthContext == null) {
        resourceOwnerOAuthContext = tokensStore.get(transformedResourceOwnerId);
        resourceOwnerOAuthContext
                .setRefreshUserOAuthContextLock(createLockForResourceOwner(transformedResourceOwnerId));
    }
    return resourceOwnerOAuthContext;
}

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From source file:org.eclipse.gyrex.monitoring.metrics.BaseMetric.java

/**
 * Resets the metric statistics but not the metric values.
 *///from  ww w  .java  2s.  co  m
public final void resetStats() {
    final Lock writeLock = getWriteLock();
    writeLock.lock();
    try {
        statsSince = System.currentTimeMillis();
        doResetStats();
    } finally {
        writeLock.unlock();
    }
}

---

From source file:com.mg.framework.service.DatabaseAuditServiceImpl.java

public void stop() {
    Lock lock = entityAuditSetupLock.writeLock();
    lock.lock();
    try {//from  w  ww.j av a2 s  .  co  m
        entityAuditSetup.clear();
    } finally {
        lock.unlock();
    }
}

---

From source file:org.mule.security.oauth.BaseOAuthClientFactory.java

/**
 * Passivates the object by updating the state of the persisted object with the
 * one of the given one. If the object doesn't exist in the object store then it
 * is created//w  w  w  .j a  v  a  2s .  co m
 * 
 * @param key the key of the object at the object store
 * @param connector an instance of {@link org.mule.security.oauth.OAuth2Adapter}
 * @throws IllegalArgumentException if obj is not an instance of the type returned by {@link BaseOAuthClientFactory#getAdapterClass()}
 */
@Override
public final void passivateObject(String key, OAuth2Adapter connector) throws Exception {
    if (!this.getAdapterClass().isInstance(connector)) {
        throw new IllegalArgumentException("Invalid connector type");
    }

    OAuthState state;

    Lock lock = this.getLock(key);
    lock.lock();

    try {
        if (this.objectStore.contains(key)) {
            state = this.retrieveOAuthState(key, false);
            this.objectStore.remove(key);
        } else {
            state = new OAuthState();
        }

        state.setAccessToken(connector.getAccessToken());
        state.setAccessTokenUrl(connector.getAccessTokenUrl());
        state.setAuthorizationUrl(connector.getAuthorizationUrl());
        state.setRefreshToken(connector.getRefreshToken());

        this.setCustomStateProperties(connector, state);

        this.objectStore.store(key, state);
    } finally {
        lock.unlock();
    }
}

---

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