com.datastax.driver.core

Class Cluster.Builder

java.lang.Object

com.datastax.driver.core.Cluster.Builder

All Implemented Interfaces:

Cluster.Initializer

Enclosing class:

Cluster

public static class Cluster.Builder
extends Object
implements Cluster.Initializer

Helper class to build Cluster instances.

Constructor Summary

Constructors

Constructor and Description
Builder()

Method Summary

Modifier and Type	Method and Description
Cluster.Builder	addContactPoint(String address) Adds a contact point.
Cluster.Builder	addContactPoints(Collection<InetAddress> addresses) Adds contact points.
Cluster.Builder	addContactPoints(InetAddress... addresses) Adds contact points.
Cluster.Builder	addContactPoints(String... addresses) Adds contact points.
Cluster.Builder	addContactPoints(String address) Adds a contact point - or many if it host resolves to multiple InetAddresss (A records).
Cluster.Builder	addContactPointsWithPorts(Collection<InetSocketAddress> addresses) Adds contact points.
Cluster	build() Builds the cluster with the configured set of initial contact points and policies.
String	getClusterName() An optional name for the created cluster.
Configuration	getConfiguration() The configuration that will be used for the new cluster.
List<InetSocketAddress>	getContactPoints() Returns the initial Cassandra hosts to connect to.
Collection<Host.StateListener>	getInitialListeners() Optional listeners to register against the newly created cluster.
Cluster.Builder	withAddressTranslater(AddressTranslater translater) Configures the address translater to use for the new cluster.
Cluster.Builder	withAuthProvider(AuthProvider authProvider) Use the specified AuthProvider when connecting to Cassandra hosts.
Cluster.Builder	withClusterName(String name) An optional name for the create cluster.
Cluster.Builder	withCompression(ProtocolOptions.Compression compression) Sets the compression to use for the transport.
Cluster.Builder	withCredentials(String username, String password) Uses the provided credentials when connecting to Cassandra hosts.
Cluster.Builder	withInitialListeners(Collection<Host.StateListener> listeners) Register the provided listeners in the newly created cluster.
Cluster.Builder	withLoadBalancingPolicy(LoadBalancingPolicy policy) Configures the load balancing policy to use for the new cluster.
Cluster.Builder	withMaxSchemaAgreementWaitSeconds(int maxSchemaAgreementWaitSeconds) Sets the maximum time to wait for schema agreement before returning from a DDL query.
Cluster.Builder	withNettyOptions(NettyOptions nettyOptions) Set the NettyOptions to use for the newly created Cluster.
Cluster.Builder	withoutJMXReporting() Disables JMX reporting of the metrics.
Cluster.Builder	withoutMetrics() Disables metrics collection for the created cluster (metrics are enabled by default otherwise).
Cluster.Builder	withPoolingOptions(PoolingOptions options) Sets the PoolingOptions to use for the newly created Cluster.
Cluster.Builder	withPort(int port) The port to use to connect to the Cassandra host.
Cluster.Builder	withProtocolVersion(int version) The native protocol version to use.
Cluster.Builder	withQueryOptions(QueryOptions options) Sets the QueryOptions to use for the newly created Cluster.
Cluster.Builder	withReconnectionPolicy(ReconnectionPolicy policy) Configures the reconnection policy to use for the new cluster.
Cluster.Builder	withRetryPolicy(RetryPolicy policy) Configures the retry policy to use for the new cluster.
Cluster.Builder	withSocketOptions(SocketOptions options) Sets the SocketOptions to use for the newly created Cluster.
Cluster.Builder	withSpeculativeExecutionPolicy(SpeculativeExecutionPolicy policy) Configures the speculative execution policy to use for the new cluster.
Cluster.Builder	withSSL() Enables the use of SSL for the created Cluster.
Cluster.Builder	withSSL(SSLOptions sslOptions) Enable the use of SSL for the created Cluster using the provided options.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Builder

public Builder()

Method Detail

getClusterName

public String getClusterName()

Description copied from interface: Cluster.Initializer

An optional name for the created cluster.

Such name is optional (a default name will be created otherwise) and is currently only use for JMX reporting of metrics. See Cluster.getClusterName() for more information.

Specified by:

getClusterName in interface Cluster.Initializer

Returns:

the name for the created cluster or null to use an automatically generated name.

getContactPoints

public List<InetSocketAddress> getContactPoints()

Description copied from interface: Cluster.Initializer

Returns the initial Cassandra hosts to connect to.

Specified by:

getContactPoints in interface Cluster.Initializer

Returns:

the initial Cassandra contact points. See addContactPoint(java.lang.String) for more details on contact points.

withClusterName

public Cluster.Builder withClusterName(String name)

An optional name for the create cluster.

Note: this is not related to the Cassandra cluster name (though you are free to provide the same name). See Cluster.getClusterName() for details.

If you use this method and create more than one Cluster instance in the same JVM (which should be avoided unless you need to connect to multiple Cassandra clusters), you should make sure each Cluster instance get a unique name or you may have a problem with JMX reporting.

Parameters:

name - the cluster name to use for the created Cluster instance.

Returns:

this Builder.

withPort

public Cluster.Builder withPort(int port)

The port to use to connect to the Cassandra host.

If not set through this method, the default port (9042) will be used instead.

Parameters:

port - the port to set.

Returns:

this Builder.

withMaxSchemaAgreementWaitSeconds

public Cluster.Builder withMaxSchemaAgreementWaitSeconds(int maxSchemaAgreementWaitSeconds)

Sets the maximum time to wait for schema agreement before returning from a DDL query.

If not set through this method, the default value (10 seconds) will be used.

Parameters:

maxSchemaAgreementWaitSeconds - the new value to set.

Returns:

this Builder.

Throws:

IllegalStateException - if the provided value is zero or less.

withProtocolVersion

public Cluster.Builder withProtocolVersion(int version)

The native protocol version to use.

The driver supports both version 1 and 2 of the native protocol. Version 2 of the protocol has more features and should be preferred, but it is only supported by Cassandra 2.0 and above, so you will have to use version 1 with Cassandra 1.2 nodes.

By default, the driver will "auto-detect" which protocol version it can use when connecting to the first node. More precisely, it will try the version 2 first and will fallback to version 1 if it is not supported by that first node it connects to. Please note that once the version is "auto-detected", it won't change: if the first node the driver connects to is a Cassandra 1.2 node and auto-detection is used (the default), then the native protocol version 1 will be use for the lifetime of the Cluster instance.

This method allows to force the use of a particular protocol version. Forcing version 1 is always fine since all Cassandra version (at least all those supporting the native protocol in the first place) so far supports it. However, please note that a number of features of the driver won't be available if that version of thr protocol is in use, including result set paging, BatchStatement, executing a non-prepared query with binary values (Session.execute(String, Object...)), ... (those methods will throw an UnsupportedFeatureException). Using the protocol version 1 should thus only be considered when using Cassandra 1.2, until nodes have been upgraded to Cassandra 2.0.

If version 2 of the protocol is used, then Cassandra 1.2 nodes will be ignored (the driver won't connect to them).

The default behavior (auto-detection) is fine in almost all case, but you may want to force a particular version if you have a Cassandra cluster with mixed 1.2/2.0 nodes (i.e. during a Cassandra upgrade).

Parameters:

version - the native protocol version to use. The versions supported by this driver are version 1 and 2. Negative values are also supported to trigger auto-detection (see above) but this is the default (so you don't have to call this method for that behavior).

Returns:

this Builder.

Throws:

IllegalArgumentException - if version is neither 1, 2 or a negative value.

addContactPoint

public Cluster.Builder addContactPoint(String address)

Adds a contact point.

Contact points are addresses of Cassandra nodes that the driver uses to discover the cluster topology. Only one contact point is required (the driver will retrieve the address of the other nodes automatically), but it is usually a good idea to provide more than one contact point, because if that single contact point is unavailable, the driver cannot initialize itself correctly.

Note that by default (that is, unless you use the withLoadBalancingPolicy(com.datastax.driver.core.policies.LoadBalancingPolicy)) method of this builder), the first succesfully contacted host will be use to define the local data-center for the client. If follows that if you are running Cassandra in a multiple data-center setting, it is a good idea to only provided contact points that are in the same datacenter than the client, or to provide manually the load balancing policy that suits your need.

Parameters:

address - the address of the node to connect to

Returns:

this Builder.

Throws:

IllegalArgumentException - if no IP address for address could be found

SecurityException - if a security manager is present and permission to resolve the host name is denied.

addContactPoints

public Cluster.Builder addContactPoints(String... addresses)

Adds contact points.

See addContactPoint(java.lang.String) for more details on contact points.

Parameters:

addresses - addresses of the nodes to add as contact point.

Returns:

this Builder.

Throws:

IllegalArgumentException - if no IP address for at least one of addresses could be found

SecurityException - if a security manager is present and permission to resolve the host name is denied.

See Also:

addContactPoint(java.lang.String)

addContactPoints

public Cluster.Builder addContactPoints(String address)

Adds a contact point - or many if it host resolves to multiple InetAddresss (A records).

If the host name points to a dns records with multiple a-records, all InetAddresses returned will be used. Make sure that all resulting InetAddresss returned points to the same cluster and datacenter.

See addContactPoint(java.lang.String) for more details on contact points and thrown exceptions

Parameters:

address - address of the nodes to look up InetAddresses from to add as contact points.

Returns:

this Builder.

See Also:

addContactPoint(java.lang.String)

addContactPoints

public Cluster.Builder addContactPoints(InetAddress... addresses)

Adds contact points.

See addContactPoint(java.lang.String) for more details on contact points.

Parameters:

addresses - addresses of the nodes to add as contact point.

Returns:

this Builder.

See Also:

addContactPoint(java.lang.String)

addContactPoints

public Cluster.Builder addContactPoints(Collection<InetAddress> addresses)

Adds contact points. See addContactPoint(java.lang.String) for more details on contact points.

Parameters:

addresses - addresses of the nodes to add as contact point

Returns:

this Builder

See Also:

addContactPoint(java.lang.String)

addContactPointsWithPorts

public Cluster.Builder addContactPointsWithPorts(Collection<InetSocketAddress> addresses)

Adds contact points.

See addContactPoint(java.lang.String) for more details on contact points. Contrarily to other addContactPoints methods, this method allow to provide a different port for each contact points. Since Cassandra nodes must always all listen on the same port, this is rarelly what you want and most use should prefer other addContactPoints methods to this one. However, this can be useful if the Cassandra nodes are behind a router and are not accessed directly. Note that if you are in this situtation (Cassandra nodes are behind a router, not directly accessible), you almost surely want to provide a specific AddressTranslater (through withAddressTranslater(com.datastax.driver.core.policies.AddressTranslater)) to translate actual Cassandra node addresses to the addresses the driver should use, otherwise the driver will not be able to auto-detect new nodes (and will generally not function optimally).

Parameters:

addresses - addresses of the nodes to add as contact point

Returns:

this Builder

See Also:

addContactPoint(java.lang.String)

withLoadBalancingPolicy

public Cluster.Builder withLoadBalancingPolicy(LoadBalancingPolicy policy)

Configures the load balancing policy to use for the new cluster.

If no load balancing policy is set through this method, Policies.defaultLoadBalancingPolicy() will be used instead.

Parameters:

policy - the load balancing policy to use.

Returns:

this Builder.

withReconnectionPolicy

public Cluster.Builder withReconnectionPolicy(ReconnectionPolicy policy)

Configures the reconnection policy to use for the new cluster.

If no reconnection policy is set through this method, Policies.DEFAULT_RECONNECTION_POLICY will be used instead.

Parameters:

policy - the reconnection policy to use.

Returns:

this Builder.

withRetryPolicy

public Cluster.Builder withRetryPolicy(RetryPolicy policy)

Configures the retry policy to use for the new cluster.

If no retry policy is set through this method, Policies.DEFAULT_RETRY_POLICY will be used instead.

Parameters:

policy - the retry policy to use.

Returns:

this Builder.

withAddressTranslater

public Cluster.Builder withAddressTranslater(AddressTranslater translater)

Configures the address translater to use for the new cluster.

See AddressTranslater for more detail on address translation, but the default translater, IdentityTranslater, should be correct in most cases. If unsure, stick to the default.

Parameters:

translater - the translater to use.

Returns:

this Builder.

withSpeculativeExecutionPolicy

public Cluster.Builder withSpeculativeExecutionPolicy(SpeculativeExecutionPolicy policy)

Configures the speculative execution policy to use for the new cluster.

If no policy is set through this method, Policies.defaultSpeculativeExecutionPolicy() will be used instead.

Parameters:

policy - the policy to use.

Returns:

this Builder.

withCredentials

public Cluster.Builder withCredentials(String username,
                                       String password)

Uses the provided credentials when connecting to Cassandra hosts.

This should be used if the Cassandra cluster has been configured to use the PasswordAuthenticator. If the the default AllowAllAuthenticator is used instead, using this method has no effect.

Parameters:

username - the username to use to login to Cassandra hosts.

password - the password corresponding to username.

Returns:

this Builder.

withAuthProvider

public Cluster.Builder withAuthProvider(AuthProvider authProvider)

Use the specified AuthProvider when connecting to Cassandra hosts.

Use this method when a custom authentication scheme is in place. You shouldn't call both this method and withCredentials on the same Builder instance as one will supersede the other

Parameters:

authProvider - the AuthProvider to use to login to Cassandra hosts.

Returns:

this Builder

withCompression

public Cluster.Builder withCompression(ProtocolOptions.Compression compression)

Sets the compression to use for the transport.

Parameters:

compression - the compression to set.

Returns:

this Builder.

See Also:

ProtocolOptions.Compression

withoutMetrics

public Cluster.Builder withoutMetrics()

Disables metrics collection for the created cluster (metrics are enabled by default otherwise).

Returns:

this builder.

withSSL

public Cluster.Builder withSSL()

Enables the use of SSL for the created Cluster.

Calling this method will use default SSL options (see SSLOptions.SSLOptions()). This is thus a shortcut for withSSL(new SSLOptions()).

Note that if SSL is enabled, the driver will not connect to any Cassandra nodes that doesn't have SSL enabled and it is strongly advised to enable SSL on every Cassandra node if you plan on using SSL in the driver.

Returns:

this builder.

withSSL

public Cluster.Builder withSSL(SSLOptions sslOptions)

Enable the use of SSL for the created Cluster using the provided options.

Parameters:

sslOptions - the SSL options to use.

Returns:

this builder.

withInitialListeners

public Cluster.Builder withInitialListeners(Collection<Host.StateListener> listeners)

Register the provided listeners in the newly created cluster.

Note: repeated calls to this method will override the previous ones.

Parameters:

listeners - the listeners to register.

Returns:

this builder.

withoutJMXReporting

public Cluster.Builder withoutJMXReporting()

Disables JMX reporting of the metrics.

JMX reporting is enabled by default (see Metrics) but can be disabled using this option. If metrics are disabled, this is a no-op.

Returns:

this builder.

withPoolingOptions

public Cluster.Builder withPoolingOptions(PoolingOptions options)

Sets the PoolingOptions to use for the newly created Cluster.

If no pooling options are set through this method, default pooling options will be used.

Parameters:

options - the pooling options to use.

Returns:

this builder.

withSocketOptions

public Cluster.Builder withSocketOptions(SocketOptions options)

Sets the SocketOptions to use for the newly created Cluster.

If no socket options are set through this method, default socket options will be used.

Parameters:

options - the socket options to use.

Returns:

this builder.

withQueryOptions

public Cluster.Builder withQueryOptions(QueryOptions options)

Sets the QueryOptions to use for the newly created Cluster.

If no query options are set through this method, default query options will be used.

Parameters:

options - the query options to use.

Returns:

this builder.

withNettyOptions

public Cluster.Builder withNettyOptions(NettyOptions nettyOptions)

Set the NettyOptions to use for the newly created Cluster.

If no Netty options are set through this method, NettyOptions.DEFAULT_INSTANCE will be used as a default value, which means that no customization will be applied.

Parameters:

nettyOptions - the NettyOptions to use.

Returns:

this builder.

getConfiguration

public Configuration getConfiguration()

The configuration that will be used for the new cluster.

You should not modify this object directly because changes made to the returned object may not be used by the cluster build. Instead, you should use the other methods of this Builder.

Specified by:

getConfiguration in interface Cluster.Initializer

Returns:

the configuration to use for the new cluster.

getInitialListeners

public Collection<Host.StateListener> getInitialListeners()

Description copied from interface: Cluster.Initializer

Optional listeners to register against the newly created cluster.

Note that contrary to listeners registered post Cluster creation, the listeners returned by this method will see Host.StateListener.onAdd(com.datastax.driver.core.Host) events for the initial contact points.

Specified by:

getInitialListeners in interface Cluster.Initializer

Returns:

a possibly empty collection of Host.StateListener to register against the newly created cluster.

build

public Cluster build()

Builds the cluster with the configured set of initial contact points and policies.

This is a convenience method for Cluster.buildFrom(this).

Returns:

the newly built Cluster instance.