Examples with LoadBalancingPolicy com.datastax.driver.core.policies.LoadBalancingPolicy used on opensource projects

Example 1 with LoadBalancingPolicy

use of com.datastax.driver.core.policies.LoadBalancingPolicy in project spring-boot by spring-projects.

the class CassandraAutoConfiguration method cluster.

@Bean
@ConditionalOnMissingBean
public Cluster cluster() {
    CassandraProperties properties = this.properties;
    Cluster.Builder builder = Cluster.builder().withClusterName(properties.getClusterName()).withPort(properties.getPort());
    if (properties.getUsername() != null) {
        builder.withCredentials(properties.getUsername(), properties.getPassword());
    }
    if (properties.getCompression() != null) {
        builder.withCompression(properties.getCompression());
    }
    if (properties.getLoadBalancingPolicy() != null) {
        LoadBalancingPolicy policy = instantiate(properties.getLoadBalancingPolicy());
        builder.withLoadBalancingPolicy(policy);
    }
    builder.withQueryOptions(getQueryOptions());
    if (properties.getReconnectionPolicy() != null) {
        ReconnectionPolicy policy = instantiate(properties.getReconnectionPolicy());
        builder.withReconnectionPolicy(policy);
    }
    if (properties.getRetryPolicy() != null) {
        RetryPolicy policy = instantiate(properties.getRetryPolicy());
        builder.withRetryPolicy(policy);
    }
    builder.withSocketOptions(getSocketOptions());
    if (properties.isSsl()) {
        builder.withSSL();
    }
    String points = properties.getContactPoints();
    builder.addContactPoints(StringUtils.commaDelimitedListToStringArray(points));
    customize(builder);
    return builder.build();
}

Example 2 with LoadBalancingPolicy

use of com.datastax.driver.core.policies.LoadBalancingPolicy in project atlasdb by palantir.

the class CqlKeyValueService method initializeConnectionPool.

@SuppressWarnings("CyclomaticComplexity")
protected void initializeConnectionPool() {
    Collection<InetSocketAddress> configuredHosts = config.servers();
    Cluster.Builder clusterBuilder = Cluster.builder();
    clusterBuilder.addContactPointsWithPorts(configuredHosts);
    // for JMX metrics
    clusterBuilder.withClusterName("atlas_cassandra_cluster_" + config.getKeyspaceOrThrow());
    clusterBuilder.withCompression(Compression.LZ4);
    if (config.sslConfiguration().isPresent()) {
        SSLContext sslContext = SslSocketFactories.createSslContext(config.sslConfiguration().get());
        SSLOptions sslOptions = new SSLOptions(sslContext, SSLOptions.DEFAULT_SSL_CIPHER_SUITES);
        clusterBuilder.withSSL(sslOptions);
    } else if (config.ssl().isPresent() && config.ssl().get()) {
        clusterBuilder.withSSL();
    }
    PoolingOptions poolingOptions = new PoolingOptions();
    poolingOptions.setMaxRequestsPerConnection(HostDistance.LOCAL, config.poolSize());
    poolingOptions.setMaxRequestsPerConnection(HostDistance.REMOTE, config.poolSize());
    poolingOptions.setPoolTimeoutMillis(config.cqlPoolTimeoutMillis());
    clusterBuilder.withPoolingOptions(poolingOptions);
    // defaults for queries; can override on per-query basis
    QueryOptions queryOptions = new QueryOptions();
    queryOptions.setFetchSize(config.fetchBatchCount());
    clusterBuilder.withQueryOptions(queryOptions);
    // Refuse to talk to nodes twice as (latency-wise) slow as the best one, over a timescale of 100ms,
    // and every 10s try to re-evaluate ignored nodes performance by giving them queries again.
    // Note we are being purposely datacenter-irreverent here, instead relying on latency alone
    // to approximate what DCAwareRR would do;
    // this is because DCs for Atlas are always quite latency-close and should be used this way,
    // not as if we have some cross-country backup DC.
    LoadBalancingPolicy policy = LatencyAwarePolicy.builder(new RoundRobinPolicy()).build();
    // If user wants, do not automatically add in new nodes to pool (useful during DC migrations / rebuilds)
    if (!config.autoRefreshNodes()) {
        policy = new WhiteListPolicy(policy, configuredHosts);
    }
    // also try and select coordinators who own the data we're talking about to avoid an extra hop,
    // but also shuffle which replica we talk to for a load balancing that comes at the expense
    // of less effective caching
    policy = new TokenAwarePolicy(policy, true);
    clusterBuilder.withLoadBalancingPolicy(policy);
    Metadata metadata;
    try {
        cluster = clusterBuilder.build();
        // special; this is the first place we connect to
        metadata = cluster.getMetadata();
    // hosts, this is where people will see failures
    } catch (NoHostAvailableException e) {
        if (e.getMessage().contains("Unknown compression algorithm")) {
            clusterBuilder.withCompression(Compression.NONE);
            cluster = clusterBuilder.build();
            metadata = cluster.getMetadata();
        } else {
            throw e;
        }
    } catch (IllegalStateException e) {
        // god dammit datastax what did I do to _you_
        if (e.getMessage().contains("requested compression is not available")) {
            clusterBuilder.withCompression(Compression.NONE);
            cluster = clusterBuilder.build();
            metadata = cluster.getMetadata();
        } else {
            throw e;
        }
    }
    session = cluster.connect();
    clusterBuilder.withSocketOptions(new SocketOptions().setReadTimeoutMillis(CassandraConstants.LONG_RUNNING_QUERY_SOCKET_TIMEOUT_MILLIS));
    longRunningQueryCluster = clusterBuilder.build();
    longRunningQuerySession = longRunningQueryCluster.connect();
    cqlStatementCache = new CqlStatementCache(session, longRunningQuerySession);
    cqlKeyValueServices = new CqlKeyValueServices();
    if (log.isInfoEnabled()) {
        StringBuilder hostInfo = new StringBuilder();
        for (Host host : metadata.getAllHosts()) {
            hostInfo.append(String.format("Datatacenter: %s; Host: %s; Rack: %s%n", host.getDatacenter(), host.getAddress(), host.getRack()));
        }
        log.info("Initialized cassandra cluster using new API with hosts {}, seen keyspaces {}, cluster name {}", hostInfo.toString(), metadata.getKeyspaces(), metadata.getClusterName());
    }
}

Example 3 with LoadBalancingPolicy

use of com.datastax.driver.core.policies.LoadBalancingPolicy in project tutorials by eugenp.

the class CassandraConfiguration method cluster.

@Bean
public Cluster cluster(CassandraProperties properties) {
    Cluster.Builder builder = Cluster.builder().withClusterName(properties.getClusterName()).withProtocolVersion(protocolVersion).withPort(getPort(properties));
    if (properties.getUsername() != null) {
        builder.withCredentials(properties.getUsername(), properties.getPassword());
    }
    if (properties.getCompression() != null) {
        builder.withCompression(properties.getCompression());
    }
    if (properties.getLoadBalancingPolicy() != null) {
        LoadBalancingPolicy policy = instantiate(properties.getLoadBalancingPolicy());
        builder.withLoadBalancingPolicy(policy);
    }
    builder.withQueryOptions(getQueryOptions(properties));
    if (properties.getReconnectionPolicy() != null) {
        ReconnectionPolicy policy = instantiate(properties.getReconnectionPolicy());
        builder.withReconnectionPolicy(policy);
    }
    if (properties.getRetryPolicy() != null) {
        RetryPolicy policy = instantiate(properties.getRetryPolicy());
        builder.withRetryPolicy(policy);
    }
    builder.withSocketOptions(getSocketOptions(properties));
    if (properties.isSsl()) {
        builder.withSSL();
    }
    String points = properties.getContactPoints();
    builder.addContactPoints(StringUtils.commaDelimitedListToStringArray(points));
    Cluster cluster = builder.build();
    cluster.getConfiguration().getCodecRegistry().register(LocalDateCodec.instance).register(CustomZonedDateTimeCodec.instance);
    if (metricRegistry != null) {
        cluster.init();
        metricRegistry.registerAll(cluster.getMetrics().getRegistry());
    }
    return cluster;
}

Example 4 with LoadBalancingPolicy

use of com.datastax.driver.core.policies.LoadBalancingPolicy in project java-driver by datastax.

the class HostAssert method isAtDistance.

public HostAssert isAtDistance(HostDistance expected) {
    LoadBalancingPolicy loadBalancingPolicy = cluster.manager.loadBalancingPolicy();
    assertThat(loadBalancingPolicy.distance(actual)).isEqualTo(expected);
    return this;
}

Example 5 with LoadBalancingPolicy

use of com.datastax.driver.core.policies.LoadBalancingPolicy in project eventapis by kloiasoft.

the class CassandraSession method cluster.

/*    private Cluster cluster() {
            Cluster.Builder builder = Cluster.builder();
            Arrays.stream(eventStoreConfig.getContactPoints().split(";")).forEach(s -> {
                String[] hostPort = s.split(":");
                builder.addContactPointsWithPorts(new InetSocketAddress(hostPort[0], Integer.parseInt(hostPort[1])));
            });
            builder.withPoolingOptions(eventStoreConfig.getPoolingOptions());

            Cluster cluster = builder.build();
            cluster.register(QueryLogger.builder().build());
            return cluster.init();
        }*/
private Cluster cluster() {
    EventStoreConfig properties = eventStoreConfig;
    Cluster.Builder builder = Cluster.builder().withClusterName(properties.getClusterName()).withPort(properties.getPort());
    if (properties.getUsername() != null) {
        builder.withCredentials(properties.getUsername(), properties.getPassword());
    }
    if (properties.getCompression() != null) {
        builder.withCompression(properties.getCompression());
    }
    if (properties.getLoadBalancingPolicy() != null) {
        LoadBalancingPolicy policy = instantiate(properties.getLoadBalancingPolicy());
        builder.withLoadBalancingPolicy(policy);
    }
    builder.withQueryOptions(getQueryOptions());
    if (properties.getReconnectionPolicy() != null) {
        ReconnectionPolicy policy = instantiate(properties.getReconnectionPolicy());
        builder.withReconnectionPolicy(policy);
    }
    if (properties.getRetryPolicy() != null) {
        RetryPolicy policy = instantiate(properties.getRetryPolicy());
        builder.withRetryPolicy(policy);
    }
    builder.withSocketOptions(getSocketOptions());
    if (properties.isSsl()) {
        builder.withSSL();
    }
    String points = properties.getContactPoints();
    builder.addContactPointsWithPorts(Arrays.stream(StringUtils.split(points, ",")).map(s -> {
        String[] split = s.split(":");
        String host = split[0];
        int port = properties.getPort();
        try {
            port = Integer.parseInt(split[1]);
        } catch (Exception e) {
            log.trace(e.getMessage());
        }
        return new InetSocketAddress(host, port);
    }).collect(Collectors.toList()));
    return builder.build();
}