Package org.apache.tinkerpop.gremlin.driver

Class Client.ClusteredClient

java.lang.Object

org.apache.tinkerpop.gremlin.driver.Client

org.apache.tinkerpop.gremlin.driver.Client.ClusteredClient

All Implemented Interfaces:

RequestSubmitter, RequestSubmitterAsync

Enclosing class:

Client

public static final class Client.ClusteredClient
extends Client

A Client implementation. Requests are sent to multiple servers given a LoadBalancingStrategy. Transactions are automatically committed (or rolled-back on error) after each request.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.tinkerpop.gremlin.driver.Client

Client.AliasClusteredClient, Client.ClusteredClient, Client.PinnedClient

Field Summary

Fields inherited from class org.apache.tinkerpop.gremlin.driver.Client

cluster, initialized, TOO_MANY_IN_FLIGHT_REQUESTS

Method Summary

Modifier and Type	Method	Description
Client	alias(String graphOrTraversalSource)	Create a new Client that aliases the specified Graph or TraversalSource name on the server to a variable called "g" for the context of the requests made through that Client.
protected org.apache.tinkerpop.gremlin.driver.Connection	chooseConnection(RequestMessage msg)	Uses a LoadBalancingStrategy to choose the best Host and then selects the best connection from that host's connection pool.
CompletableFuture<Void>	closeAsync()	Closes all the connection pools on all hosts.
protected void	initializeImplementation()	Initializes the connection pools on all hosts.
boolean	isClosing()
ResultSet	submit(String gremlin, String graphOrTraversalSource)	Submits a Gremlin script to the server and returns a ResultSet once the write of the request is complete.
ResultSet	submit(String gremlin, String graphOrTraversalSource, Map<String,Object> parameters)	Submits a Gremlin script and bound parameters to the server and returns a ResultSet once the write of the request is complete.
boolean	tryReInitializeHost(Host host)	Attempt to re-initialize the Host that was previously marked as unavailable.

Methods inherited from class org.apache.tinkerpop.gremlin.driver.Client

buildMessage, chooseRandomHost, close, getCluster, init, submit, submit, submit, submitAsync, submitAsync, submitAsync, submitAsync, submitAsync

Methods inherited from class java.lang.Object

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

Method Details

isClosing

public boolean isClosing()

Specified by:

isClosing in class Client

submit

public ResultSet submit(String gremlin,
 String graphOrTraversalSource)

Submits a Gremlin script to the server and returns a ResultSet once the write of the request is complete.

Parameters:

gremlin - the gremlin script to execute

submit

public ResultSet submit(String gremlin,
 String graphOrTraversalSource,
 Map<String,Object> parameters)

Submits a Gremlin script and bound parameters to the server and returns a ResultSet once the write of the request is complete. If a script is to be executed repeatedly with slightly different arguments, prefer this method to concatenating a Gremlin script from dynamically produced strings and sending it to Client.submit(String). Parameterized scripts will perform better.

Parameters:

gremlin - the gremlin script to execute

parameters - a map of parameters that will be bound to the script on execution

graphOrTraversalSource - rebinds the specified global Gremlin Server variable to "g"

alias

public Client alias(String graphOrTraversalSource)

Create a new Client that aliases the specified Graph or TraversalSource name on the server to a variable called "g" for the context of the requests made through that Client.

Overrides:

alias in class Client

Parameters:

graphOrTraversalSource - rebinds the specified global Gremlin Server variable to "g"

chooseConnection

protected org.apache.tinkerpop.gremlin.driver.Connection chooseConnection(RequestMessage msg)
                                                                   throws TimeoutException,
ConnectionException

Uses a LoadBalancingStrategy to choose the best Host and then selects the best connection from that host's connection pool.

Specified by:

chooseConnection in class Client

Throws:

TimeoutException

ConnectionException

initializeImplementation

protected void initializeImplementation()

Initializes the connection pools on all hosts.

Specified by:

initializeImplementation in class Client

closeAsync

public CompletableFuture<Void> closeAsync()

Closes all the connection pools on all hosts.

Specified by:

closeAsync in class Client

tryReInitializeHost

public boolean tryReInitializeHost(Host host)

Attempt to re-initialize the Host that was previously marked as unavailable. This method gets called as part of a schedule in Host to periodically try to re-initialize.