Package com.rabbitmq.stream

Interface EnvironmentBuilder

    • Method Detail

      • uri

        EnvironmentBuilder uri​(String uri)
        The URI of a node to connect to.

        URI must be of the form rabbitmq-stream://guest:guest@localhost:5552/%2f.

        Parameters:
        uri -
        Returns:
        this builder instance

      • uris

        EnvironmentBuilder uris​(List<String> uris)
        A list of URIs of nodes of the same cluster to use to connect to.

        URIs must be of the form rabbitmq-stream://guest:guest@localhost:5552/%2f.

        Parameters:
        uris -
        Returns:
        this builder instance

      • addressResolver

        EnvironmentBuilder addressResolver​(AddressResolver addressResolver)
        An AddressResolver to potentially change resolved node address to connect to.

        Applications can use this abstraction to make sure connection attempts ignore metadata hints and always go to a single point like a load balancer. Consider setting locatorConnectionCount(int) when using a load balancer.

        The default implementation does not perform any logic, it just returns the passed-in address.

        The default implementation is overridden automatically if the following conditions are met: the host to connect to is localhost, the user is guest, and no address resolver has been provided. The client will then always try to connect to localhost to facilitate local development. Just provide a pass-through address resolver to avoid this behavior, e.g.: 

         Environment.builder()
   .addressResolver(address -> address)
   .build();
        Parameters:
        addressResolver - the address resolver
        Returns:
        this builder instance
        See Also:
        "Connecting to Streams" blog post, locatorConnectionCount(int)

      • host

        EnvironmentBuilder host​(String host)
        The host to connect to.
        Parameters:
        host -
        Returns:
        this builder instance

      • port

        EnvironmentBuilder port​(int port)
        The port to use to connect.
        Parameters:
        port -
        Returns:
        this builder instance

      • codec

        EnvironmentBuilder codec​(Codec codec)
        The AMQP 1.0 codec used to encode and decode AMQP 1.0 messages.
        Parameters:
        codec -
        Returns:
        this builder instance

      • id

        EnvironmentBuilder id​(String id)
        Informational ID for this environment instance.

        This is currently used as a prefix for connection names. The broker does not enforce any kind of uniqueness based on this property. Default to rabbitmq-stream.

        Parameters:
        id -
        Returns:
        this builder instance

      • rpcTimeout

        EnvironmentBuilder rpcTimeout​(Duration timeout)
        Timeout for RPC calls.

        Default is 10 seconds.

        Parameters:
        timeout -
        Returns:
        this builder instance

      • username

        EnvironmentBuilder username​(String username)
        The username to use.
        Parameters:
        username -
        Returns:
        this builder instance

      • password

        EnvironmentBuilder password​(String password)
        The password to use.
        Parameters:
        password -
        Returns:
        this builder instance

      • virtualHost

        EnvironmentBuilder virtualHost​(String virtualHost)
        The virtual host to connect to.
        Parameters:
        virtualHost -
        Returns:
        this builder instance

      • requestedMaxFrameSize

        EnvironmentBuilder requestedMaxFrameSize​(int requestedMaxFrameSize)
        The maximum frame size to request.

        Default is 1048576.

        Parameters:
        requestedMaxFrameSize -
        Returns:
        this builder instance
        See Also:
        Stream plugin documentation

      • chunkChecksum

        EnvironmentBuilder chunkChecksum​(ChunkChecksum chunkChecksum)
        The checksum strategy used for chunk checksum.

        The default is CRC32 based on JDK implementation.

        Parameters:
        chunkChecksum -
        Returns:
        this builder instance

      • clientProperties

        EnvironmentBuilder clientProperties​(Map<String,​String> clientProperties)
        Custom client properties to add to default client properties.
        Parameters:
        clientProperties -
        Returns:
        this builder instance

      • clientProperty

        EnvironmentBuilder clientProperty​(String key,
                                  String value)
        Add a custom client properties to default client properties.
        Parameters:
        key -
        value -
        Returns:
        this builder instance

      • maxProducersByConnection

        EnvironmentBuilder maxProducersByConnection​(int maxProducersByConnection)
        The maximum number of producers allocated to a single connection.

        Default is 256, which is the maximum value.

        The limit may not be strictly enforced in case of too many concurrent creations.

        Parameters:
        maxProducersByConnection -
        Returns:
        this builder instance

      • maxTrackingConsumersByConnection

        EnvironmentBuilder maxTrackingConsumersByConnection​(int maxTrackingConsumersByConnection)
        The maximum number of tracking consumers allocated to a single connection.

        Default is 50, which is the maximum value.

        The limit may not be strictly enforced in case of too many concurrent creations.

        Parameters:
        maxTrackingConsumersByConnection -
        Returns:
        this builder instance

      • maxConsumersByConnection

        EnvironmentBuilder maxConsumersByConnection​(int maxConsumersByConnection)
        The maximum number of consumers allocated to a single connection.

        Default is 256, which is the maximum value.

        The limit may not be strictly enforced in case of too many concurrent creations.

        Parameters:
        maxConsumersByConnection -
        Returns:
        this builder instance

      • scheduledExecutorService

        EnvironmentBuilder scheduledExecutorService​(ScheduledExecutorService scheduledExecutorService)
        Set the ScheduledExecutorService used to:
        • Schedule producers batch sending
        • Handle connection recovery
        • Handle topology update
        Parameters:
        scheduledExecutorService - the service to use
        Returns:
        this builder instance

      • recoveryBackOffDelayPolicy

        EnvironmentBuilder recoveryBackOffDelayPolicy​(BackOffDelayPolicy recoveryBackOffDelayPolicy)
        The BackOffDelayPolicy to use for connection recovery.

        The default is a fixed delay of 5 seconds.

        Parameters:
        recoveryBackOffDelayPolicy -
        Returns:
        this builder instance

      • topologyUpdateBackOffDelayPolicy

        EnvironmentBuilder topologyUpdateBackOffDelayPolicy​(BackOffDelayPolicy topologyUpdateBackOffDelayPolicy)
        The BackOffDelayPolicy to use for topology recovery.

        Topology recovery can kick in when streams leaders and replicas move from nodes to nodes in the cluster.

        The default is a first delay of 5 seconds, then 1 second for the next attempts.

        Parameters:
        topologyUpdateBackOffDelayPolicy -
        Returns:
        this builder instance

      • lazyInitialization

        EnvironmentBuilder lazyInitialization​(boolean lazy)
        To delay the connection opening until necessary.

        No connection will be open before it is necessary (for stream management or producer/consumer creation).

        Default is false.

        Parameters:
        lazy -
        Returns:
        this builder instance

      • forceReplicaForConsumers

        EnvironmentBuilder forceReplicaForConsumers​(boolean forceReplica)
        Flag to force the connection to a stream replica for consumers.

        The library will always prefer to connect to a stream replica to consume from, but it will fall back to the stream leader if no replica is available. This is the default behavior. Set this flag to true to make the library wait for a replica to become available if only the stream leader is available. This can lead to longer recovery time but help to offload a stream leader and let it deal only with write requests.

        Note the library performs only 5 attempts to locate a replica before falling back to the leader when the flag is set to true.

        The recoveryBackOffDelayPolicy(BackOffDelayPolicy) and topologyUpdateBackOffDelayPolicy(BackOffDelayPolicy) policies control the time between attempts.

        Do not set this flag to true when streams have only 1 member (the leader), e.g. for local development.

        Default is false.

        Parameters:
        forceReplica - whether to force the connection to a replica or not
        Returns:
        this builder instance
        Since:
        0.13.0
        See Also:
        recoveryBackOffDelayPolicy(BackOffDelayPolicy), topologyUpdateBackOffDelayPolicy(BackOffDelayPolicy)

      • forceLeaderForProducers

        EnvironmentBuilder forceLeaderForProducers​(boolean forceLeader)
        Flag to force the connection to the stream leader for producers.

        The library prefers to connect to a node that hosts a stream leader for producers (default behavior).

        When using a load balancer, the library does not know in advance the node it connects to. It may have to retry to connect to the appropriate node.

        It will retry until it connects to the appropriate node (flag set to true, the default). This provides the best data locality, but may require several attempts, delaying the creation or the recovery of producers. This usually suits high-throughput use cases.

        The library will accept the connection to a stream replica if the flag is set to false . This will speed up the creation/recovery of producers, but at the cost of network hops between cluster nodes when publishing messages because only a stream leader accepts writes. This is usually acceptable for low-throughput use cases.

        Changing the default value should only benefit systems where a load balancer sits between the client applications and the cluster nodes.

        Default is true.

        Parameters:
        forceLeader - whether to force the connection to the leader or not
        Returns:
        this builder instance
        Since:
        0.21.0
        See Also:
        recoveryBackOffDelayPolicy(BackOffDelayPolicy), topologyUpdateBackOffDelayPolicy(BackOffDelayPolicy)

      • locatorConnectionCount

        StreamEnvironmentBuilder locatorConnectionCount​(int locatorConnectionCount)
        Set the expected number of "locator" connections to maintain.

        Locator connections are used to perform infrastructure-related operations (e.g. looking up the topology of a stream to find an appropriate node to connect to).

        It is recommended to maintain 2 to 3 locator connections. The environment uses the smaller of the number of passed-in URIs and 3 by default (see uris(List)).

        The number of locator connections should be explicitly set when a load balancer is used, as the environment cannot know the number of cluster nodes in this case (the only URI set is the one of the load balancer).

        Parameters:
        locatorConnectionCount - number of expected locator connections
        Returns:
        this builder instance
        Since:
        0.21.0
        See Also:
        uris(List), addressResolver(AddressResolver)