Struct cassandra_cpp::Cluster
[−]
[src]
pub struct Cluster(pub *mut _Cluster);
The main class to use when interacting with a Cassandra cluster. Typically, one instance of this class will be created for each separate Cassandra cluster that your application interacts with.
Examples
use cassandra_cpp::Cluster; let mut cluster = Cluster::default(); cluster.set_contact_points("127.0.0.1").unwrap(); let _session = cluster.connect().unwrap();
Methods
impl Cluster[src]
fn set_contact_points(&mut self, contact_points: &str) -> Result<&mut Self>[src]
Sets/Appends contact points. This MUST be set. The first call sets the contact points and any subsequent calls appends additional contact points. Passing an empty string will clear the contact points. White space is stripped from the contact points.
{contact points: "127.0.0.1" "127.0.0.1,127.0.0.2", "server1.domain.com"}
fn set_port(&mut self, port: u16) -> Result<&mut Self>[src]
Sets the port
Default: 9042
fn set_ssl(&mut self, ssl: &mut Ssl) -> &Self[src]
Sets the SSL context and enables SSL
fn connect(&mut self) -> Result<Session>[src]
Performs a blocking call to connect to Cassandra cluster
fn set_protocol_version(
&mut self,
protocol_version: CqlProtocol
) -> Result<&mut Self>[src]
&mut self,
protocol_version: CqlProtocol
) -> Result<&mut Self>
Sets the protocol version. This will automatically downgrade to the lowest supported protocol version.
Default: version 4
fn set_num_threads_io(&mut self, num_threads: u32) -> Result<&mut Self>[src]
Sets the number of IO threads. This is the number of threads that will handle query requests.
Default: 1
fn set_queue_size_io(&mut self, queue_size: u32) -> Result<&mut Self>[src]
Sets the size of the fixed size queue that stores pending requests.
Default: 8192
fn set_queue_size_event(&mut self, queue_size: u32) -> Result<&mut Self>[src]
Sets the size of the fixed size queue that stores events.
Default: 8192
fn set_core_connections_per_host(
&mut self,
num_connections: u32
) -> Result<&mut Self>[src]
&mut self,
num_connections: u32
) -> Result<&mut Self>
Sets the number of connections made to each server in each IO thread.
Default: 1
fn set_max_connections_per_host(
&mut self,
num_connections: u32
) -> Result<&mut Self>[src]
&mut self,
num_connections: u32
) -> Result<&mut Self>
Sets the maximum number of connections made to each server in each IO thread.
Default: 2
fn set_reconnect_wait_time(&mut self, wait_time: u32) -> &Self[src]
Sets the amount of time to wait before attempting to reconnect.
Default: 1000ms
fn set_max_concurrent_creation(
&mut self,
num_connections: u32
) -> Result<&mut Self>[src]
&mut self,
num_connections: u32
) -> Result<&mut Self>
Sets the maximum number of connections that will be created concurrently. Connections are created when the current connections are unable to keep up with request throughput.
Default: 1
fn set_max_concurrent_requests_threshold(
&mut self,
num_requests: u32
) -> Result<&mut Self>[src]
&mut self,
num_requests: u32
) -> Result<&mut Self>
Sets the threshold for the maximum number of concurrent requests in-flight on a connection before creating a new connection. The number of new connections created will not exceed max_connections_per_host.
Default: 100
fn set_max_requests_per_flush(&mut self, num_requests: u32) -> Result<&mut Self>[src]
Sets the maximum number of requests processed by an IO worker per flush.
Default: 128
fn set_write_bytes_high_water_mark(
&mut self,
num_bytes: u32
) -> Result<&mut Self>[src]
&mut self,
num_bytes: u32
) -> Result<&mut Self>
Sets the high water mark for the number of bytes outstanding on a connection. Disables writes to a connection if the number of bytes queued exceed this value.
Default: 64KB
fn set_write_bytes_low_water_mark(
&mut self,
num_bytes: u32
) -> Result<&mut Self>[src]
&mut self,
num_bytes: u32
) -> Result<&mut Self>
Sets the low water mark for the number of bytes outstanding on a connection. Disables writes to a connection if the number of bytes queued fall below this value.
Default: 32KB
fn set_pending_requests_high_water_mark(
&mut self,
num_requests: u32
) -> Result<&mut Self>[src]
&mut self,
num_requests: u32
) -> Result<&mut Self>
Sets the high water mark for the number of requests queued waiting for a connection in a connection pool. Disables writes to a host on an IO worker if the number of requests queued exceed this value.
Default: 256
fn set_pending_requests_low_water_mark(
&mut self,
num_requests: u32
) -> Result<&mut Self>[src]
&mut self,
num_requests: u32
) -> Result<&mut Self>
Sets the low water mark for the number of requests queued waiting for a connection in a connection pool. After exceeding high water mark requests, writes to a host will only resume once the number of requests fall below this value.
Default: 128
fn set_connect_timeout(&mut self, timeout: Duration) -> &Self[src]
Sets the timeout for connecting to a node.
Default: 5000ms
fn set_request_timeout(&mut self, timeout: Duration) -> &Self[src]
Sets the timeout for waiting for a response from a node.
Default: 12000ms
fn set_credentials(
&mut self,
username: &str,
password: &str
) -> Result<&mut Self>[src]
&mut self,
username: &str,
password: &str
) -> Result<&mut Self>
Sets credentials for plain text authentication.
fn set_load_balance_round_robin(&mut self) -> &Self[src]
Configures the cluster to use round-robin load balancing.
The driver discovers all nodes in a cluster and cycles through them per request. All are considered 'local'.
fn set_load_balance_dc_aware<S>(
&mut self,
local_dc: &str,
used_hosts_per_remote_dc: u32,
allow_remote_dcs_for_local_cl: cass_bool_t
) -> Result<&mut Self>[src]
&mut self,
local_dc: &str,
used_hosts_per_remote_dc: u32,
allow_remote_dcs_for_local_cl: cass_bool_t
) -> Result<&mut Self>
Configures the cluster to use DC-aware load balancing. For each query, all live nodes in a primary 'local' DC are tried first, followed by any node from other DCs.
Note: This is the default, and does not need to be called unless switching an existing from another policy or changing settings. Without further configuration, a default local_dc is chosen from the first connected contact point, and no remote hosts are considered in query plans. If relying on this mechanism, be sure to use only contact points from the local DC.
fn set_token_aware_routing(&mut self, enabled: bool) -> &Self[src]
Configures the cluster to use token-aware request routing or not.
Important: Token-aware routing depends on keyspace information. For this reason enabling token-aware routing will also enable the usage of schema metadata.
Default: true (enabled).
This routing policy composes the base routing policy, routing requests first to replicas on nodes considered 'local' by the base load balancing policy.
fn set_latency_aware_routing(&mut self, enabled: bool) -> &Self[src]
Configures the cluster to use latency-aware request routing or not.
Default: false (disabled).
This routing policy is a top-level routing policy. It uses the base routing policy to determine locality (dc-aware) and/or placement (token-aware) before considering the latency.
fn set_latency_aware_routing_settings(
&mut self,
exclusion_threshold: f64,
scale: Duration,
retry_period: Duration,
update_rate: Duration,
min_measured: u64
) -> &Self[src]
&mut self,
exclusion_threshold: f64,
scale: Duration,
retry_period: Duration,
update_rate: Duration,
min_measured: u64
) -> &Self
Configures the settings for latency-aware request routing.
Defaults:
- exclusion_threshold: 2.0
- scale_ms: 100 milliseconds
- retry_period_ms: 10,000 milliseconds (10 seconds)
- update_rate_ms: 100 milliseconds
- min_measured: 50
fn set_whitelist_filtering(&mut self, hosts: Vec<String>) -> &Self[src]
/Sets/Appends whitelist hosts. The first call sets the whitelist hosts and any subsequent calls appends additional hosts. Passing an empty string will clear and disable the whitelist. White space is striped from the hosts.
This policy filters requests to all other policies, only allowing requests to the hosts contained in the whitelist. Any host not in the whitelist will be ignored and a connection will not be established. This policy is useful for ensuring that the driver will only connect to a predefined set of hosts.
Examples: "127.0.0.1" "127.0.0.1,127.0.0.2", "server1.domain.com"
fn set_tcp_nodelay(&mut self, enable: bool) -> &Self[src]
Enable/Disable Nagel's algorithm on connections.
Default: true (disables Nagel's algorithm).
fn set_tcp_keepalive(&mut self, enable: bool, delay: Duration) -> &Self[src]
Enable/Disable TCP keep-alive
Default: false (disabled).
fn set_timestamp_gen(&mut self, tsg: &TimestampGen) -> &mut Self[src]
Sets the timestamp generator used to assign timestamps to all requests unless overridden by setting the timestamp on a statement or a batch.
Default: server-side timestamp generator.
fn set_connection_heartbeat_interval(&mut self, hearbeat: Duration) -> &mut Self[src]
Sets the amount of time between heartbeat messages and controls the amount of time the connection must be idle before sending heartbeat messages. This is useful for preventing intermediate network devices from dropping connections.
Default: 30 seconds
fn set_connection_idle_timeout(&mut self, timeout: Duration) -> &mut Self[src]
Sets the amount of time a connection is allowed to be without a successful heartbeat response before being terminated and scheduled for reconnection.
Default: 60 seconds
fn set_retry_policy(&mut self, retry_policy: RetryPolicy) -> &mut Self[src]
Sets the retry policy used for all requests unless overridden by setting a retry policy on a statement or a batch.
Default: The same policy as would be created by the function: cass_retry_policy_default_new(). This policy will retry on a read timeout if there was enough replicas, but no data present, on a write timeout if a logged batch request failed to write the batch log, and on a unavailable error it retries using a new host. In all other cases the default policy will return an error.
fn set_use_schema(&mut self, enabled: bool) -> &Self[src]
Enable/Disable retrieving and updating schema metadata. If disabled this is allows the driver to skip over retrieving and updating schema metadata, but it also disables the usage of token-aware routing and cass_session_get_schema() will always return an empty object. This can be useful for reducing the startup overhead of short-lived sessions.
Default: true (enabled).