Examples of com.datastax.driver.core.policies.LoadBalancingPolicy

Package com.datastax.driver.core.policies

Examples of com.datastax.driver.core.policies.LoadBalancingPolicy

com.datastax.driver.core.policies.LoadBalancingPolicy
The policy that decides which Cassandra hosts to contact for each new query.
Two methods need to be implemented:
- {@link LoadBalancingPolicy#distance}: returns the "distance" of an host for that balancing policy.
- {@link LoadBalancingPolicy#newQueryPlan}: it is used for each query to find which host to query first, and which hosts to use as failover.
The {@code LoadBalancingPolicy} is a {@link com.datastax.driver.core.Host.StateListener}and is thus informed of hosts up/down events. For efficiency purposes, the policy is expected to exclude down hosts from query plans.

        assertThat(actual.state).isEqualTo(expected);
        return this;
    }


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

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    public static Cluster getInputCluster(String host, Configuration conf)
    {
        int port = getInputNativePort(conf);
        Optional<AuthProvider> authProvider = getAuthProvider(conf);
        Optional<SSLOptions> sslOptions = getSSLOptions(conf);
        LoadBalancingPolicy loadBalancingPolicy = getReadLoadBalancingPolicy(conf, host);
        SocketOptions socketOptions = getReadSocketOptions(conf);
        QueryOptions queryOptions = getReadQueryOptions(conf);
        PoolingOptions poolingOptions = getReadPoolingOptions(conf);
        
        Cluster.Builder builder = Cluster.builder()

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        return socketOptions;
    }


    private static LoadBalancingPolicy getReadLoadBalancingPolicy(Configuration conf, final String stickHost)
    {
        return new LoadBalancingPolicy()
        {
            private Host origHost;
            private Set<Host> liveRemoteHosts = Sets.newHashSet();


            @Override

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        Policies policies = configuration.getPolicies();
        JsonObject policiesJson = new JsonObject();
        json.putObject("policies", policiesJson);


        if (policies != null) {
            LoadBalancingPolicy lbPolicy = policies.getLoadBalancingPolicy();
            policiesJson.putString("load_balancing", lbPolicy == null ? null : lbPolicy.getClass().getSimpleName());
            ReconnectionPolicy reconnectionPolicy = policies.getReconnectionPolicy();
            policiesJson.putString("reconnection", reconnectionPolicy == null ? null : reconnectionPolicy.getClass().getSimpleName());
            RetryPolicy retryPolicy = policies.getRetryPolicy();
            policiesJson.putString("retry", retryPolicy == null ? null : retryPolicy.getClass().getSimpleName());
        }

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        Policies policies = configuration.getPolicies();
        JsonObject policiesJson = new JsonObject();
        json.putObject("policies", policiesJson);


        if (policies != null) {
            LoadBalancingPolicy lbPolicy = policies.getLoadBalancingPolicy();
            policiesJson.putString("load_balancing", lbPolicy == null ? null : lbPolicy.getClass().getSimpleName());
            ReconnectionPolicy reconnectionPolicy = policies.getReconnectionPolicy();
            policiesJson.putString("reconnection", reconnectionPolicy == null ? null : reconnectionPolicy.getClass().getSimpleName());
            RetryPolicy retryPolicy = policies.getRetryPolicy();
            policiesJson.putString("retry", retryPolicy == null ? null : retryPolicy.getClass().getSimpleName());
        }

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        Policies policies = configuration.getPolicies();
        JsonObject policiesJson = new JsonObject();
        json.putObject("policies", policiesJson);


        if (policies != null) {
            LoadBalancingPolicy lbPolicy = policies.getLoadBalancingPolicy();
            policiesJson.putString("load_balancing", lbPolicy == null ? null : lbPolicy.getClass().getSimpleName());
            ReconnectionPolicy reconnectionPolicy = policies.getReconnectionPolicy();
            policiesJson.putString("reconnection", reconnectionPolicy == null ? null : reconnectionPolicy.getClass().getSimpleName());
            RetryPolicy retryPolicy = policies.getRetryPolicy();
            policiesJson.putString("retry", retryPolicy == null ? null : retryPolicy.getClass().getSimpleName());
        }

View Full Code Here

    public static Cluster getInputCluster(String[] hosts, Configuration conf)
    {
        int port = getInputNativePort(conf);
        Optional<AuthProvider> authProvider = getAuthProvider(conf);
        Optional<SSLOptions> sslOptions = getSSLOptions(conf);
        LoadBalancingPolicy loadBalancingPolicy = getReadLoadBalancingPolicy(conf, hosts);
        SocketOptions socketOptions = getReadSocketOptions(conf);
        QueryOptions queryOptions = getReadQueryOptions(conf);
        PoolingOptions poolingOptions = getReadPoolingOptions(conf);
        
        Cluster.Builder builder = Cluster.builder()

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    public static Cluster getInputCluster(String[] hosts, Configuration conf)
    {
        int port = getInputNativePort(conf);
        Optional<AuthProvider> authProvider = getAuthProvider(conf);
        Optional<SSLOptions> sslOptions = getSSLOptions(conf);
        LoadBalancingPolicy loadBalancingPolicy = getReadLoadBalancingPolicy(conf, hosts);
        SocketOptions socketOptions = getReadSocketOptions(conf);
        QueryOptions queryOptions = getReadQueryOptions(conf);
        PoolingOptions poolingOptions = getReadPoolingOptions(conf);
        
        Cluster.Builder builder = Cluster.builder()

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    public static Cluster getInputCluster(String host, Configuration conf)
    {
        int port = getInputNativePort(conf);
        Optional<AuthProvider> authProvider = getAuthProvider(conf);
        Optional<SSLOptions> sslOptions = getSSLOptions(conf);
        LoadBalancingPolicy loadBalancingPolicy = getReadLoadBalancingPolicy(conf, host);
        SocketOptions socketOptions = getReadSocketOptions(conf);
        QueryOptions queryOptions = getReadQueryOptions(conf);
        PoolingOptions poolingOptions = getReadPoolingOptions(conf);
        
        Cluster.Builder builder = Cluster.builder()

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        return socketOptions;
    }


    private static LoadBalancingPolicy getReadLoadBalancingPolicy(Configuration conf, final String stickHost)
    {
        return new LoadBalancingPolicy()
        {
            private Host origHost;
            private Set<Host> liveRemoteHosts = Sets.newHashSet();


            @Override

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