org.apache.activemq.artemis.api.core.client

## Interface ServerLocator

- All Superinterfaces:
    AutoCloseable

      public interface ServerLocator
      extends AutoCloseable

  The serverLocator locates a server, but beyond that it locates a server based on a list.

  If you are using straight TCP on the configuration, and if you configure your serverLocator to be HA, the locator will always get an updated list of members to the server, the server will send the updated list to the client.

  If you use UDP or JGroups (exclusively JGroups or UDP), the initial discovery is done by the grouping finder, after the initial connection is made the server will always send updates to the client. But the listeners will listen for updates on grouping.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `ServerLocator` | `addClusterTopologyListener(ClusterTopologyListener listener)`
    `ServerLocator` | `addIncomingInterceptor(Interceptor interceptor)` Adds an interceptor which will be executed after packets are received from the server.
    `ServerLocator` | `addOutgoingInterceptor(Interceptor interceptor)` Adds an interceptor which will be executed before packets are sent to the server.
    `boolean` | `allInVM()` Verify if all of the transports are using inVM.
    `void` | `close()` Closes this factory and release all its resources
    `ClientSessionFactory` | `createSessionFactory()` Creates a ClientSessionFactory using whatever load balancing policy is in force
    `ClientSessionFactory` | `createSessionFactory(String nodeID)` Creates a `ClientSessionFactory` to a specific server.
    `ClientSessionFactory` | `createSessionFactory(TransportConfiguration transportConfiguration)` Creates a `ClientSessionFactory` to a specific server.
    `ClientSessionFactory` | `createSessionFactory(TransportConfiguration transportConfiguration, int reconnectAttempts, boolean failoverOnInitialConnection)` Creates a `ClientSessionFactory` to a specific server.
    `void` | `disableFinalizeCheck()` This method will disable any checks when a GarbageCollection happens leaving connections open.
    `int` | `getAckBatchSize()` Returns the acknowledgments batch size.
    `long` | `getCallFailoverTimeout()` Returns the blocking calls failover timeout when the client is awaiting failover, this is over and above the normal call timeout.
    `long` | `getCallTimeout()` Returns the blocking calls timeout.
    `long` | `getClientFailureCheckPeriod()` Returns the period used to check if a client has failed to receive pings from the server.
    `int` | `getConfirmationWindowSize()` Returns the size for the confirmation window of clients using this factory.
    `String` | `getConnectionLoadBalancingPolicyClassName()` Returns the class name of the connection load balancing policy.
    `long` | `getConnectionTTL()` Returns the connection time-to-live.
    `int` | `getConsumerMaxRate()` Returns the maximum rate of message consumption for consumers created through this factory.
    `int` | `getConsumerWindowSize()` Returns the window size for flow control of the consumers created through this factory.
    `DiscoveryGroupConfiguration` | `getDiscoveryGroupConfiguration()` The discovery group configuration
    `String` | `getGroupID()` Returns the group ID that will be eventually set on each message for the property `Message.HDR_GROUP_ID`.
    `String` | `getIncomingInterceptorList()`
    `int` | `getInitialConnectAttempts()`
    `int` | `getInitialMessagePacketSize()` Returns the initial size of messages created through this factory.
    `long` | `getMaxRetryInterval()` Returns the maximum retry interval (in the case a retry interval multiplier has been specified).
    `int` | `getMinLargeMessageSize()` Returns the large message size threshold.
    `String` | `getOutgoingInterceptorList()`
    `int` | `getProducerMaxRate()` Returns the maximum rate of message production for producers created through this factory.
    `int` | `getProducerWindowSize()` Returns the window size for flow control of the producers created through this factory.
    `ClientProtocolManagerFactory` | `getProtocolManagerFactory()`
    `int` | `getReconnectAttempts()` Returns the maximum number of attempts to retry connection in case of failure.
    `long` | `getRetryInterval()` Returns the time to retry connections created by this factory after failure.
    `double` | `getRetryIntervalMultiplier()` Returns the multiplier to apply to successive retry intervals.
    `int` | `getScheduledThreadPoolMaxSize()` Returns the maximum size of the scheduled thread pool.
    `TransportConfiguration[]` | `getStaticTransportConfigurations()` Returns an array of TransportConfigurations representing the static list of live servers used when creating this object
    `int` | `getThreadPoolMaxSize()` Returns the maximum size of the thread pool.
    `org.apache.activemq.artemis.core.client.impl.Topology` | `getTopology()` Exposes the Topology used by this ServerLocator.
    `boolean` | `isAutoGroup()` Returns whether producers created through this factory will automatically assign a group ID to the messages they sent.
    `boolean` | `isBlockOnAcknowledge()` Returns whether consumers created through this factory will block while sending message acknowledgments or do it asynchronously.
    `boolean` | `isBlockOnDurableSend()` Returns whether producers created through this factory will block while sending durable messages or do it asynchronously.
    `boolean` | `isBlockOnNonDurableSend()` Returns whether producers created through this factory will block while sending non-durable messages or do it asynchronously.
    `boolean` | `isCacheLargeMessagesClient()` When `true`, consumers created through this factory will create temporary files to cache large messages.
    `boolean` | `isClosed()` Returns true if close was already called
    `boolean` | `isCompressLargeMessage()` Whether to compress large messages.
    `boolean` | `isFailoverOnInitialConnection()` Returns true if the client will automatically attempt to connect to the backup server if the initial connection to the live server fails
    `boolean` | `isHA()` Whether this server receives topology notifications from the cluster as servers join or leave the cluster.
    `boolean` | `isPreAcknowledge()` Returns whether messages will pre-acknowledged on the server before they are sent to the consumers or not.
    `boolean` | `isUseGlobalPools()` Returns whether this factory will use global thread pools (shared among all the factories in the same JVM) or its own pools.
    `void` | `removeClusterTopologyListener(ClusterTopologyListener listener)`
    `boolean` | `removeIncomingInterceptor(Interceptor interceptor)` Removes an incoming interceptor.
    `boolean` | `removeOutgoingInterceptor(Interceptor interceptor)` Removes an outgoing interceptor.
    `ServerLocator` | `setAckBatchSize(int ackBatchSize)` Sets the acknowledgments batch size.
    `ServerLocator` | `setAutoGroup(boolean autoGroup)` Sets whether producers created through this factory will automatically assign a group ID to the messages they sent.
    `ServerLocator` | `setBlockOnAcknowledge(boolean blockOnAcknowledge)` Sets whether consumers created through this factory will block while sending message acknowledgments or do it asynchronously.
    `ServerLocator` | `setBlockOnDurableSend(boolean blockOnDurableSend)` Sets whether producers created through this factory will block while sending durable messages or do it asynchronously.
    `ServerLocator` | `setBlockOnNonDurableSend(boolean blockOnNonDurableSend)` Sets whether producers created through this factory will block while sending non-durable messages or do it asynchronously.
    `ServerLocator` | `setCacheLargeMessagesClient(boolean cached)` Sets whether large messages received by consumers created through this factory will be cached in temporary files or not.
    `ServerLocator` | `setCallFailoverTimeout(long callFailoverTimeout)` Sets the blocking call failover timeout.
    `ServerLocator` | `setCallTimeout(long callTimeout)` Sets the blocking call timeout.
    `ServerLocator` | `setClientFailureCheckPeriod(long clientFailureCheckPeriod)` Sets the period (in milliseconds) used to check if a client has failed to receive pings from the server.
    `ServerLocator` | `setCompressLargeMessage(boolean compressLargeMessages)` Sets whether to compress or not large messages.
    `ServerLocator` | `setConfirmationWindowSize(int confirmationWindowSize)` Sets the size for the confirmation window buffer of clients using this factory.
    `ServerLocator` | `setConnectionLoadBalancingPolicyClassName(String loadBalancingPolicyClassName)` Sets the class name of the connection load balancing policy.
    `ServerLocator` | `setConnectionTTL(long connectionTTL)` Sets this factory's connections time-to-live.
    `ServerLocator` | `setConsumerMaxRate(int consumerMaxRate)` Sets the maximum rate of message consumption for consumers created through this factory.
    `ServerLocator` | `setConsumerWindowSize(int consumerWindowSize)` Sets the window size for flow control of the consumers created through this factory.
    `ServerLocator` | `setFailoverOnInitialConnection(boolean failover)` Sets the value for FailoverOnInitialReconnection
    `ServerLocator` | `setGroupID(String groupID)` Sets the group ID that will be set on each message sent through this factory.
    `ServerLocator` | `setIncomingInterceptorList(String interceptorList)`
    `ServerLocator` | `setInitialConnectAttempts(int reconnectAttempts)` Sets the maximum number of attempts to establish an initial connection.
    `ServerLocator` | `setInitialMessagePacketSize(int size)` Sets the initial size of messages created through this factory.
    `ServerLocator` | `setMaxRetryInterval(long maxRetryInterval)` Sets the maximum retry interval.
    `ServerLocator` | `setMinLargeMessageSize(int minLargeMessageSize)` Sets the large message size threshold.
    `ServerLocator` | `setOutgoingInterceptorList(String interceptorList)`
    `ServerLocator` | `setPreAcknowledge(boolean preAcknowledge)` Sets to `true` to pre-acknowledge consumed messages on the server before they are sent to consumers, else set to `false` to let clients acknowledge the message they consume.
    `ServerLocator` | `setProducerMaxRate(int producerMaxRate)` Sets the maximum rate of message production for producers created through this factory.
    `ServerLocator` | `setProducerWindowSize(int producerWindowSize)` Returns the window size for flow control of the producers created through this factory.
    `ServerLocator` | `setProtocolManagerFactory(ClientProtocolManagerFactory protocolManager)`
    `ServerLocator` | `setReconnectAttempts(int reconnectAttempts)` Sets the maximum number of attempts to retry connection in case of failure.
    `ServerLocator` | `setRetryInterval(long retryInterval)` Sets the time to retry connections created by this factory after failure.
    `ServerLocator` | `setRetryIntervalMultiplier(double retryIntervalMultiplier)` Sets the multiplier to apply to successive retry intervals.
    `ServerLocator` | `setScheduledThreadPoolMaxSize(int scheduledThreadPoolMaxSize)` Sets the maximum size of the scheduled thread pool.
    `ServerLocator` | `setThreadPoolMaxSize(int threadPoolMaxSize)` Sets the maximum size of the thread pool.
    `ServerLocator` | `setUseGlobalPools(boolean useGlobalPools)` Sets whether this factory will use global thread pools (shared among all the factories in the same JVM) or its own pools.

- - ### Method Detail

    - #### isClosed

          boolean isClosed()

      Returns true if close was already called
      Returns:
        `true` if closed, `false` otherwise.

    - #### disableFinalizeCheck

          void disableFinalizeCheck()

      This method will disable any checks when a GarbageCollection happens leaving connections open. The JMS Layer will make specific usage of this method, since the ConnectionFactory.finalize should release this.

      Warning: You may leave resources unattended if you call this method and don't take care of cleaning the resources yourself.

    - #### createSessionFactory

          ClientSessionFactory createSessionFactory()
                                             throws Exception

      Creates a ClientSessionFactory using whatever load balancing policy is in force
      Returns:
        The ClientSessionFactory
      Throws:
        `Exception`

    - #### createSessionFactory

          ClientSessionFactory createSessionFactory(String nodeID)
                                             throws Exception

      Creates a `ClientSessionFactory` to a specific server. The server must already be known about by this ServerLocator. This method allows the user to make a connection to a specific server bypassing any load balancing policy in force
      Parameters:
        `nodeID` -
      Returns:
        a ClientSessionFactory instance or `null` if the node is not present on the topology
      Throws:
        `Exception` - if a failure happened in creating the ClientSessionFactory or the ServerLocator does not know about the passed in transportConfiguration

    - #### createSessionFactory

          ClientSessionFactory createSessionFactory(TransportConfiguration transportConfiguration)
                                             throws Exception

      Creates a `ClientSessionFactory` to a specific server. The server must already be known about by this ServerLocator. This method allows the user to make a connection to a specific server bypassing any load balancing policy in force
      Parameters:
        `transportConfiguration` -
      Returns:
        a `ClientSessionFactory` instance
      Throws:
        `Exception` - if a failure happened in creating the ClientSessionFactory or the ServerLocator does not know about the passed in transportConfiguration

    - #### createSessionFactory

          ClientSessionFactory createSessionFactory(TransportConfiguration transportConfiguration,
                                                    int reconnectAttempts,
                                                    boolean failoverOnInitialConnection)
                                             throws Exception

      Creates a `ClientSessionFactory` to a specific server. The server must already be known about by this ServerLocator. This method allows the user to make a connection to a specific server bypassing any load balancing policy in force
      Parameters:
        `transportConfiguration` -
        `reconnectAttempts` - number of attempts of reconnection to perform
        `failoverOnInitialConnection` -
      Returns:
        a `ClientSessionFactory` instance
      Throws:
        `Exception` - if a failure happened in creating the ClientSessionFactory or the ServerLocator does not know about the passed in transportConfiguration

    - #### getClientFailureCheckPeriod

          long getClientFailureCheckPeriod()

      Returns the period used to check if a client has failed to receive pings from the server.

      Period is in milliseconds, default value is `ActiveMQClient.DEFAULT_CLIENT_FAILURE_CHECK_PERIOD`.

      Returns:
        the period used to check if a client has failed to receive pings from the server

    - #### setClientFailureCheckPeriod

          ServerLocator setClientFailureCheckPeriod(long clientFailureCheckPeriod)

      Sets the period (in milliseconds) used to check if a client has failed to receive pings from the server.

      Value must be -1 (to disable) or greater than 0.

      Parameters:
        `clientFailureCheckPeriod` - the period to check failure
      Returns:
        this ServerLocator

    - #### isCacheLargeMessagesClient

          boolean isCacheLargeMessagesClient()

      When `true`, consumers created through this factory will create temporary files to cache large messages.

      There is 1 temporary file created for each large message.

      Default value is `ActiveMQClient.DEFAULT_CACHE_LARGE_MESSAGE_CLIENT`.

      Returns:
        `true` if consumers created through this factory will cache large messages in temporary files, `false` else

    - #### setCacheLargeMessagesClient

          ServerLocator setCacheLargeMessagesClient(boolean cached)

      Sets whether large messages received by consumers created through this factory will be cached in temporary files or not.
      Parameters:
        `cached` - `true` to cache large messages in temporary files, `false` else
      Returns:
        this ServerLocator

    - #### getConnectionTTL

          long getConnectionTTL()

      Returns the connection time-to-live.

      This TTL determines how long the server will keep a connection alive in the absence of any data arriving from the client. Value is in milliseconds, default value is `ActiveMQClient.DEFAULT_CONNECTION_TTL`.

      Returns:
        the connection time-to-live in milliseconds

    - #### setConnectionTTL

          ServerLocator setConnectionTTL(long connectionTTL)

      Sets this factory's connections time-to-live.

      Value must be -1 (to disable) or greater or equals to 0.

      Parameters:
        `connectionTTL` - period in milliseconds
      Returns:
        this ServerLocator

    - #### getCallTimeout

          long getCallTimeout()

      Returns the blocking calls timeout.

      If client's blocking calls to the server take more than this timeout, the call will throw a `ActiveMQException` with the code `ActiveMQExceptionType.CONNECTION_TIMEDOUT`. Value is in milliseconds, default value is `ActiveMQClient.DEFAULT_CALL_TIMEOUT`.

      Returns:
        the blocking calls timeout

    - #### setCallTimeout

          ServerLocator setCallTimeout(long callTimeout)

      Sets the blocking call timeout.

      Value must be greater or equals to 0

      Parameters:
        `callTimeout` - blocking call timeout in milliseconds
      Returns:
        this ServerLocator

    - #### getCallFailoverTimeout

          long getCallFailoverTimeout()

      Returns the blocking calls failover timeout when the client is awaiting failover, this is over and above the normal call timeout.

      If client is in the process of failing over when a blocking call is called then the client will wait this long before actually trying the send.

      Returns:
        the blocking calls failover timeout

    - #### setCallFailoverTimeout

          ServerLocator setCallFailoverTimeout(long callFailoverTimeout)

      Sets the blocking call failover timeout.

      When the client is awaiting failover, this is over and above the normal call timeout.

      Value must be greater or equals to -1, -1 means forever

      Parameters:
        `callFailoverTimeout` - blocking call timeout in milliseconds
      Returns:
        this ServerLocator

    - #### getMinLargeMessageSize

          int getMinLargeMessageSize()

      Returns the large message size threshold.

      Messages whose size is if greater than this value will be handled as large messages. Value is in bytes, default value is `ActiveMQClient.DEFAULT_MIN_LARGE_MESSAGE_SIZE`.

      Returns:
        the message size threshold to treat messages as large messages.

    - #### setMinLargeMessageSize

          ServerLocator setMinLargeMessageSize(int minLargeMessageSize)

      Sets the large message size threshold.

      Value must be greater than 0.

      Parameters:
        `minLargeMessageSize` - large message size threshold in bytes
      Returns:
        this ServerLocator

    - #### getConsumerWindowSize

          int getConsumerWindowSize()

      Returns the window size for flow control of the consumers created through this factory.

      Value is in bytes, default value is `ActiveMQClient.DEFAULT_CONSUMER_WINDOW_SIZE`.

      Returns:
        the window size used for consumer flow control

    - #### setConsumerWindowSize

          ServerLocator setConsumerWindowSize(int consumerWindowSize)

      Sets the window size for flow control of the consumers created through this factory.

      Value must be -1 (to disable flow control), 0 (to not buffer any messages) or greater than 0 (to set the maximum size of the buffer)

      Parameters:
        `consumerWindowSize` - window size (in bytes) used for consumer flow control
      Returns:
        this ServerLocator

    - #### getConsumerMaxRate

          int getConsumerMaxRate()

      Returns the maximum rate of message consumption for consumers created through this factory.

      This value controls the rate at which a consumer can consume messages. A consumer will never consume messages at a rate faster than the rate specified.

      Value is -1 (to disable) or a positive integer corresponding to the maximum desired message consumption rate specified in units of messages per second. Default value is `ActiveMQClient.DEFAULT_CONSUMER_MAX_RATE`.

      Returns:
        the consumer max rate

    - #### setConsumerMaxRate

          ServerLocator setConsumerMaxRate(int consumerMaxRate)

      Sets the maximum rate of message consumption for consumers created through this factory.

      Value must -1 (to disable) or a positive integer corresponding to the maximum desired message consumption rate specified in units of messages per second.

      Parameters:
        `consumerMaxRate` - maximum rate of message consumption (in messages per seconds)
      Returns:
        this ServerLocator

    - #### getConfirmationWindowSize

          int getConfirmationWindowSize()

      Returns the size for the confirmation window of clients using this factory.

      Value is in bytes or -1 (to disable the window). Default value is `ActiveMQClient.DEFAULT_CONFIRMATION_WINDOW_SIZE`.

      Returns:
        the size for the confirmation window of clients using this factory

    - #### setConfirmationWindowSize

          ServerLocator setConfirmationWindowSize(int confirmationWindowSize)

      Sets the size for the confirmation window buffer of clients using this factory.

      Value must be -1 (to disable the window) or greater than 0.

      Parameters:
        `confirmationWindowSize` - size of the confirmation window (in bytes)
      Returns:
        this ServerLocator

    - #### getProducerWindowSize

          int getProducerWindowSize()

      Returns the window size for flow control of the producers created through this factory.

      Value must be -1 (to disable flow control) or greater than 0 to determine the maximum amount of bytes at any give time (to prevent overloading the connection). Default value is `ActiveMQClient.DEFAULT_PRODUCER_WINDOW_SIZE`.

      Returns:
        the window size for flow control of the producers created through this factory.

    - #### setProducerWindowSize

          ServerLocator setProducerWindowSize(int producerWindowSize)

      Returns the window size for flow control of the producers created through this factory.

      Value must be -1 (to disable flow control) or greater than 0.

      Parameters:
        `producerWindowSize` - window size (in bytest) for flow control of the producers created through this factory.
      Returns:
        this ServerLocator

    - #### getProducerMaxRate

          int getProducerMaxRate()

      Returns the maximum rate of message production for producers created through this factory.

      This value controls the rate at which a producer can produce messages. A producer will never produce messages at a rate faster than the rate specified.

      Value is -1 (to disable) or a positive integer corresponding to the maximum desired message production rate specified in units of messages per second. Default value is `ActiveMQClient.DEFAULT_PRODUCER_MAX_RATE`.

      Returns:
        maximum rate of message production (in messages per seconds)

    - #### setProducerMaxRate

          ServerLocator setProducerMaxRate(int producerMaxRate)

      Sets the maximum rate of message production for producers created through this factory.

      Value must -1 (to disable) or a positive integer corresponding to the maximum desired message production rate specified in units of messages per second.

      Parameters:
        `producerMaxRate` - maximum rate of message production (in messages per seconds)
      Returns:
        this ServerLocator

    - #### isBlockOnAcknowledge

          boolean isBlockOnAcknowledge()

      Returns whether consumers created through this factory will block while sending message acknowledgments or do it asynchronously.

      Default value is `ActiveMQClient.DEFAULT_BLOCK_ON_ACKNOWLEDGE`.

      Returns:
        whether consumers will block while sending message acknowledgments or do it asynchronously

    - #### setBlockOnAcknowledge

          ServerLocator setBlockOnAcknowledge(boolean blockOnAcknowledge)

      Sets whether consumers created through this factory will block while sending message acknowledgments or do it asynchronously.
      Parameters:
        `blockOnAcknowledge` - `true` to block when sending message acknowledgments or `false` to send them asynchronously
      Returns:
        this ServerLocator

    - #### isBlockOnDurableSend

          boolean isBlockOnDurableSend()

      Returns whether producers created through this factory will block while sending durable messages or do it asynchronously.
      If the session is configured to send durable message asynchronously, the client can set a SendAcknowledgementHandler on the ClientSession to be notified once the message has been handled by the server.

      Default value is `ActiveMQClient.DEFAULT_BLOCK_ON_DURABLE_SEND`.

      Returns:
        whether producers will block while sending persistent messages or do it asynchronously

    - #### setBlockOnDurableSend

          ServerLocator setBlockOnDurableSend(boolean blockOnDurableSend)

      Sets whether producers created through this factory will block while sending durable messages or do it asynchronously.
      Parameters:
        `blockOnDurableSend` - `true` to block when sending durable messages or `false` to send them asynchronously
      Returns:
        this ServerLocator

    - #### isBlockOnNonDurableSend

          boolean isBlockOnNonDurableSend()

      Returns whether producers created through this factory will block while sending non-durable messages or do it asynchronously.
      If the session is configured to send non-durable message asynchronously, the client can set a SendAcknowledgementHandler on the ClientSession to be notified once the message has been handled by the server.

      Default value is `ActiveMQClient.DEFAULT_BLOCK_ON_NON_DURABLE_SEND`.

      Returns:
        whether producers will block while sending non-durable messages or do it asynchronously

    - #### setBlockOnNonDurableSend

          ServerLocator setBlockOnNonDurableSend(boolean blockOnNonDurableSend)

      Sets whether producers created through this factory will block while sending non-durable messages or do it asynchronously.
      Parameters:
        `blockOnNonDurableSend` - `true` to block when sending non-durable messages or `false` to send them asynchronously
      Returns:
        this ServerLocator

    - #### isAutoGroup

          boolean isAutoGroup()

      Returns whether producers created through this factory will automatically assign a group ID to the messages they sent.

      if `true`, a random unique group ID is created and set on each message for the property `Message.HDR_GROUP_ID`. Default value is `ActiveMQClient.DEFAULT_AUTO_GROUP`.

      Returns:
        whether producers will automatically assign a group ID to their messages

    - #### setAutoGroup

          ServerLocator setAutoGroup(boolean autoGroup)

      Sets whether producers created through this factory will automatically assign a group ID to the messages they sent.
      Parameters:
        `autoGroup` - `true` to automatically assign a group ID to each messages sent through this factory, `false` else
      Returns:
        this ServerLocator

    - #### getGroupID

          String getGroupID()

      Returns the group ID that will be eventually set on each message for the property `Message.HDR_GROUP_ID`.

      Default value is is `null` and no group ID will be set on the messages.

      Returns:
        the group ID that will be eventually set on each message

    - #### setGroupID

          ServerLocator setGroupID(String groupID)

      Sets the group ID that will be set on each message sent through this factory.
      Parameters:
        `groupID` - the group ID to use
      Returns:
        this ServerLocator

    - #### isPreAcknowledge

          boolean isPreAcknowledge()

      Returns whether messages will pre-acknowledged on the server before they are sent to the consumers or not.

      Default value is `ActiveMQClient.DEFAULT_PRE_ACKNOWLEDGE`

    - #### setPreAcknowledge

          ServerLocator setPreAcknowledge(boolean preAcknowledge)

      Sets to `true` to pre-acknowledge consumed messages on the server before they are sent to consumers, else set to `false` to let clients acknowledge the message they consume.
      Parameters:
        `preAcknowledge` - `true` to enable pre-acknowledgment, `false` else
      Returns:
        this ServerLocator

    - #### getAckBatchSize

          int getAckBatchSize()

      Returns the acknowledgments batch size.

      Default value is `ActiveMQClient.DEFAULT_ACK_BATCH_SIZE`.

      Returns:
        the acknowledgments batch size

    - #### setAckBatchSize

          ServerLocator setAckBatchSize(int ackBatchSize)

      Sets the acknowledgments batch size.

      Value must be equal or greater than 0.

      Parameters:
        `ackBatchSize` - acknowledgments batch size
      Returns:
        this ServerLocator

    - #### getStaticTransportConfigurations

          TransportConfiguration[] getStaticTransportConfigurations()

      Returns an array of TransportConfigurations representing the static list of live servers used when creating this object
      Returns:
        array with all static `TransportConfiguration`s

    - #### getDiscoveryGroupConfiguration

          DiscoveryGroupConfiguration getDiscoveryGroupConfiguration()

      The discovery group configuration

    - #### isUseGlobalPools

          boolean isUseGlobalPools()

      Returns whether this factory will use global thread pools (shared among all the factories in the same JVM) or its own pools.

      Default value is `ActiveMQClient.DEFAULT_USE_GLOBAL_POOLS`.

      Returns:
        `true` if this factory uses global thread pools, `false` else

    - #### setUseGlobalPools

          ServerLocator setUseGlobalPools(boolean useGlobalPools)

      Sets whether this factory will use global thread pools (shared among all the factories in the same JVM) or its own pools.
      Parameters:
        `useGlobalPools` - `true` to let this factory uses global thread pools, `false` else
      Returns:
        this ServerLocator

    - #### getScheduledThreadPoolMaxSize

          int getScheduledThreadPoolMaxSize()

      Returns the maximum size of the scheduled thread pool.

      Default value is `ActiveMQClient.DEFAULT_SCHEDULED_THREAD_POOL_MAX_SIZE`.

      Returns:
        the maximum size of the scheduled thread pool.

    - #### setScheduledThreadPoolMaxSize

          ServerLocator setScheduledThreadPoolMaxSize(int scheduledThreadPoolMaxSize)

      Sets the maximum size of the scheduled thread pool.

      This setting is relevant only if this factory does not use global pools. Value must be greater than 0.

      Parameters:
        `scheduledThreadPoolMaxSize` - maximum size of the scheduled thread pool.
      Returns:
        this ServerLocator

    - #### getThreadPoolMaxSize

          int getThreadPoolMaxSize()

      Returns the maximum size of the thread pool.

      Default value is `ActiveMQClient.DEFAULT_THREAD_POOL_MAX_SIZE`.

      Returns:
        the maximum size of the thread pool.

    - #### setThreadPoolMaxSize

          ServerLocator setThreadPoolMaxSize(int threadPoolMaxSize)

      Sets the maximum size of the thread pool.

      This setting is relevant only if this factory does not use global pools. Value must be -1 (for unlimited thread pool) or greater than 0.

      Parameters:
        `threadPoolMaxSize` - maximum size of the thread pool.
      Returns:
        this ServerLocator

    - #### getRetryInterval

          long getRetryInterval()

      Returns the time to retry connections created by this factory after failure.

      Value is in milliseconds, default is `ActiveMQClient.DEFAULT_RETRY_INTERVAL`.

      Returns:
        the time to retry connections created by this factory after failure

    - #### setRetryInterval

          ServerLocator setRetryInterval(long retryInterval)

      Sets the time to retry connections created by this factory after failure.

      Value must be greater than 0.

      Parameters:
        `retryInterval` - time (in milliseconds) to retry connections created by this factory after failure
      Returns:
        this ServerLocator

    - #### getRetryIntervalMultiplier

          double getRetryIntervalMultiplier()

      Returns the multiplier to apply to successive retry intervals.

      Default value is `ActiveMQClient.DEFAULT_RETRY_INTERVAL_MULTIPLIER`.

      Returns:
        the multiplier to apply to successive retry intervals

    - #### setRetryIntervalMultiplier

          ServerLocator setRetryIntervalMultiplier(double retryIntervalMultiplier)

      Sets the multiplier to apply to successive retry intervals.

      Value must be positive.

      Parameters:
        `retryIntervalMultiplier` - multiplier to apply to successive retry intervals
      Returns:
        this ServerLocator

    - #### getMaxRetryInterval

          long getMaxRetryInterval()

      Returns the maximum retry interval (in the case a retry interval multiplier has been specified).

      Value is in milliseconds, default value is `ActiveMQClient.DEFAULT_MAX_RETRY_INTERVAL`.

      Returns:
        the maximum retry interval

    - #### setMaxRetryInterval

          ServerLocator setMaxRetryInterval(long maxRetryInterval)

      Sets the maximum retry interval.

      Value must be greater than 0.

      Parameters:
        `maxRetryInterval` - maximum retry interval to apply in the case a retry interval multiplier has been specified
      Returns:
        this ServerLocator

    - #### getReconnectAttempts

          int getReconnectAttempts()

      Returns the maximum number of attempts to retry connection in case of failure.

      Default value is `ActiveMQClient.DEFAULT_RECONNECT_ATTEMPTS`.

      Returns:
        the maximum number of attempts to retry connection in case of failure.

    - #### setReconnectAttempts

          ServerLocator setReconnectAttempts(int reconnectAttempts)

      Sets the maximum number of attempts to retry connection in case of failure.

      Value must be -1 (to retry infinitely), 0 (to never retry connection) or greater than 0.

      Parameters:
        `reconnectAttempts` - maximum number of attempts to retry connection in case of failure
      Returns:
        this ServerLocator

    - #### setInitialConnectAttempts

          ServerLocator setInitialConnectAttempts(int reconnectAttempts)

      Sets the maximum number of attempts to establish an initial connection.

      Value must be -1 (to retry infinitely), 0 (to never retry connection) or greater than 0.

      Parameters:
        `reconnectAttempts` - maximum number of attempts for the initial connection
      Returns:
        this ServerLocator

    - #### getInitialConnectAttempts

          int getInitialConnectAttempts()

      Returns:
        the number of attempts to be made for first initial connection.

    - #### isFailoverOnInitialConnection

          boolean isFailoverOnInitialConnection()

      Returns true if the client will automatically attempt to connect to the backup server if the initial connection to the live server fails

      Default value is `ActiveMQClient.DEFAULT_FAILOVER_ON_INITIAL_CONNECTION`.

    - #### setFailoverOnInitialConnection

          ServerLocator setFailoverOnInitialConnection(boolean failover)

      Sets the value for FailoverOnInitialReconnection
      Parameters:
        `failover` -
      Returns:
        this ServerLocator

    - #### getConnectionLoadBalancingPolicyClassName

          String getConnectionLoadBalancingPolicyClassName()

      Returns the class name of the connection load balancing policy.

      Default value is "org.apache.activemq.artemis.api.core.client.loadbalance.RoundRobinConnectionLoadBalancingPolicy".

      Returns:
        the class name of the connection load balancing policy

    - #### setConnectionLoadBalancingPolicyClassName

          ServerLocator setConnectionLoadBalancingPolicyClassName(String loadBalancingPolicyClassName)

      Sets the class name of the connection load balancing policy.

      Value must be the name of a class implementing `ConnectionLoadBalancingPolicy`.

      Parameters:
        `loadBalancingPolicyClassName` - class name of the connection load balancing policy
      Returns:
        this ServerLocator

    - #### getInitialMessagePacketSize

          int getInitialMessagePacketSize()

      Returns the initial size of messages created through this factory.

      Value is in bytes, default value is `ActiveMQClient.DEFAULT_INITIAL_MESSAGE_PACKET_SIZE`.

      Returns:
        the initial size of messages created through this factory

    - #### setInitialMessagePacketSize

          ServerLocator setInitialMessagePacketSize(int size)

      Sets the initial size of messages created through this factory.

      Value must be greater than 0.

      Parameters:
        `size` - initial size of messages created through this factory.
      Returns:
        this ServerLocator

    - #### addIncomingInterceptor

          ServerLocator addIncomingInterceptor(Interceptor interceptor)

      Adds an interceptor which will be executed after packets are received from the server.
      Parameters:
        `interceptor` - an Interceptor
      Returns:
        this ServerLocator

    - #### addOutgoingInterceptor

          ServerLocator addOutgoingInterceptor(Interceptor interceptor)

      Adds an interceptor which will be executed before packets are sent to the server.
      Parameters:
        `interceptor` - an Interceptor
      Returns:
        this ServerLocator

    - #### removeIncomingInterceptor

          boolean removeIncomingInterceptor(Interceptor interceptor)

      Removes an incoming interceptor.
      Parameters:
        `interceptor` - interceptor to remove
      Returns:
        `true` if the incoming interceptor is removed from this factory, `false` else

    - #### removeOutgoingInterceptor

          boolean removeOutgoingInterceptor(Interceptor interceptor)

      Removes an outgoing interceptor.
      Parameters:
        `interceptor` - interceptor to remove
      Returns:
        `true` if the outgoing interceptor is removed from this factory, `false` else

    - #### close

          void close()

      Closes this factory and release all its resources
      Specified by:
        `close` in interface `AutoCloseable`

    - #### getTopology

          org.apache.activemq.artemis.core.client.impl.Topology getTopology()

      Exposes the Topology used by this ServerLocator.
      Returns:
        topology

    - #### isHA

          boolean isHA()

      Whether this server receives topology notifications from the cluster as servers join or leave the cluster.
      Returns:
        `true` if the locator receives topology updates from the cluster

    - #### allInVM

          boolean allInVM()

      Verify if all of the transports are using inVM.
      Returns:
        `true` if the locator has all inVM transports.

    - #### isCompressLargeMessage

          boolean isCompressLargeMessage()

      Whether to compress large messages.
      Returns:

    - #### setCompressLargeMessage

          ServerLocator setCompressLargeMessage(boolean compressLargeMessages)

      Sets whether to compress or not large messages.
      Parameters:
        `compressLargeMessages` -
      Returns:
        this ServerLocator

    - #### addClusterTopologyListener

          ServerLocator addClusterTopologyListener(ClusterTopologyListener listener)

    - #### removeClusterTopologyListener

          void removeClusterTopologyListener(ClusterTopologyListener listener)

    - #### getProtocolManagerFactory

          ClientProtocolManagerFactory getProtocolManagerFactory()

    - #### setProtocolManagerFactory

          ServerLocator setProtocolManagerFactory(ClientProtocolManagerFactory protocolManager)

    - #### setIncomingInterceptorList

          ServerLocator setIncomingInterceptorList(String interceptorList)

      Parameters:
        `interceptorList` - a comma separated string of incoming interceptor class names to be used. Each interceptor needs a default Constructor to be used with this method.
      Returns:
        this

    - #### getIncomingInterceptorList

          String getIncomingInterceptorList()

    - #### setOutgoingInterceptorList

          ServerLocator setOutgoingInterceptorList(String interceptorList)

    - #### getOutgoingInterceptorList

          String getOutgoingInterceptorList()

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