Examples with SimpleEventListener org.apache.metron.zookeeper.SimpleEventListener used on opensource projects

Example 1 with SimpleEventListener

use of org.apache.metron.zookeeper.SimpleEventListener in project metron by apache.

the class ProfileBuilderBolt method setupZookeeper.

private void setupZookeeper() {
    try {
        if (zookeeperClient == null) {
            RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
            zookeeperClient = CuratorFrameworkFactory.newClient(zookeeperUrl, retryPolicy);
        }
        zookeeperClient.start();
        // this is temporary to ensure that any validation passes. the individual bolt
        // will reinitialize stellar to dynamically pull from zookeeper.
        ConfigurationsUtils.setupStellarStatically(zookeeperClient);
        if (zookeeperCache == null) {
            ConfigurationsUpdater<ProfilerConfigurations> updater = createUpdater();
            SimpleEventListener listener = new SimpleEventListener.Builder().with(updater::update, TreeCacheEvent.Type.NODE_ADDED, TreeCacheEvent.Type.NODE_UPDATED).with(updater::delete, TreeCacheEvent.Type.NODE_REMOVED).build();
            zookeeperCache = new ZKCache.Builder().withClient(zookeeperClient).withListener(listener).withRoot(Constants.ZOOKEEPER_TOPOLOGY_ROOT).build();
            updater.forceUpdate(zookeeperClient);
            zookeeperCache.start();
        }
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
}

Example 2 with SimpleEventListener

use of org.apache.metron.zookeeper.SimpleEventListener in project metron by apache.

the class ConfiguredBolt method prepCache.

protected void prepCache() {
    try {
        if (client == null) {
            RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
            client = CuratorFrameworkFactory.newClient(zookeeperUrl, retryPolicy);
        }
        client.start();
        // this is temporary to ensure that any validation passes.
        // The individual bolt will reinitialize stellar to dynamically pull from
        // zookeeper.
        ConfigurationsUtils.setupStellarStatically(client);
        if (cache == null) {
            ConfigurationsUpdater<CONFIG_T> updater = createUpdater();
            SimpleEventListener listener = new SimpleEventListener.Builder().with(updater::update, TreeCacheEvent.Type.NODE_ADDED, TreeCacheEvent.Type.NODE_UPDATED).with(updater::delete, TreeCacheEvent.Type.NODE_REMOVED).build();
            cache = new ZKCache.Builder().withClient(client).withListener(listener).withRoot(Constants.ZOOKEEPER_TOPOLOGY_ROOT).build();
            updater.forceUpdate(client);
            cache.start();
        }
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
}

Example 3 with SimpleEventListener

use of org.apache.metron.zookeeper.SimpleEventListener in project metron by apache.

the class ProfileBuilderBolt method setupZookeeper.

/**
 * Setup connectivity to Zookeeper which provides the necessary configuration for the bolt.
 */
private void setupZookeeper() {
    try {
        if (zookeeperClient == null) {
            RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
            zookeeperClient = CuratorFrameworkFactory.newClient(zookeeperUrl, retryPolicy);
        }
        zookeeperClient.start();
        // this is temporary to ensure that any validation passes. the individual bolt
        // will reinitialize stellar to dynamically pull from zookeeper.
        ConfigurationsUtils.setupStellarStatically(zookeeperClient);
        if (zookeeperCache == null) {
            ConfigurationsUpdater<ProfilerConfigurations> updater = createUpdater();
            SimpleEventListener listener = new SimpleEventListener.Builder().with(updater::update, TreeCacheEvent.Type.NODE_ADDED, TreeCacheEvent.Type.NODE_UPDATED).with(updater::delete, TreeCacheEvent.Type.NODE_REMOVED).build();
            zookeeperCache = new ZKCache.Builder().withClient(zookeeperClient).withListener(listener).withRoot(Constants.ZOOKEEPER_TOPOLOGY_ROOT).build();
            updater.forceUpdate(zookeeperClient);
            zookeeperCache.start();
        }
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
}

Example 4 with SimpleEventListener

use of org.apache.metron.zookeeper.SimpleEventListener in project metron by apache.

the class ConfiguredBolt method prepCache.

/**
 * Prepares the cache that will be used during Metron's interaction with ZooKeeper.
 */
protected void prepCache() {
    try {
        if (client == null) {
            RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
            client = CuratorFrameworkFactory.newClient(zookeeperUrl, retryPolicy);
        }
        client.start();
        // this is temporary to ensure that any validation passes.
        // The individual bolt will reinitialize stellar to dynamically pull from
        // zookeeper.
        ConfigurationsUtils.setupStellarStatically(client);
        if (cache == null) {
            ConfigurationsUpdater<CONFIG_T> updater = createUpdater();
            SimpleEventListener listener = new SimpleEventListener.Builder().with(updater::update, TreeCacheEvent.Type.NODE_ADDED, TreeCacheEvent.Type.NODE_UPDATED).with(updater::delete, TreeCacheEvent.Type.NODE_REMOVED).build();
            cache = new ZKCache.Builder().withClient(client).withListener(listener).withRoot(Constants.ZOOKEEPER_TOPOLOGY_ROOT).build();
            updater.forceUpdate(client);
            cache.start();
        }
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
}

Example 5 with SimpleEventListener

use of org.apache.metron.zookeeper.SimpleEventListener in project metron by apache.

the class ZKConfigurationsCache method initializeCache.

private void initializeCache(CuratorFramework client) {
    Lock writeLock = lock.writeLock();
    try {
        writeLock.lock();
        SimpleEventListener listener = new SimpleEventListener.Builder().with(Iterables.transform(updaters, u -> u::update), TreeCacheEvent.Type.NODE_ADDED, TreeCacheEvent.Type.NODE_UPDATED).with(Iterables.transform(updaters, u -> u::delete), TreeCacheEvent.Type.NODE_REMOVED).build();
        cache = new ZKCache.Builder().withClient(client).withListener(listener).withRoot(Constants.ZOOKEEPER_TOPOLOGY_ROOT).build();
        for (ConfigurationsUpdater<? extends Configurations> updater : updaters) {
            updater.forceUpdate(client);
        }
        cache.start();
    } catch (Exception e) {
        LOG.error("Unable to initialize zookeeper cache: " + e.getMessage(), e);
        throw new IllegalStateException("Unable to initialize zookeeper cache: " + e.getMessage(), e);
    } finally {
        writeLock.unlock();
    }
}