Package com.couchbase.client.core

Class Core

java.lang.Object

com.couchbase.client.core.Core

@Volatile
public class Core
extends Object

The main entry point into the core layer.

This class has been around behind a facade in the 1.x days, but here it is just a plain simple class that can be instantiated and is used across the upper language bindings.

Since:

2.0.0

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Core(CoreEnvironment environment, Authenticator authenticator, Set<SeedNode> seedNodes)	Creates a new Core.

Method Summary

Modifier and Type	Method	Description
ClusterConfig	clusterConfig()	This API provides access to the current config that is published throughout the core.
ConfigurationProvider	configurationProvider()	Returns the attached configuration provider.
CoreContext	context()	Returns the CoreContext of this core instance.
static Core	create(CoreEnvironment environment, Authenticator authenticator, Set<SeedNode> seedNodes)	Creates a new Core with the given environment.
protected Node	createNode(NodeIdentifier identifier, Optional<String> alternateAddress)	Create a Node from the given identifier.
Stream<EndpointDiagnostics>	diagnostics()
Mono<Void>	ensureServiceAt(NodeIdentifier identifier, ServiceType serviceType, int port, Optional<String> bucket, Optional<String> alternateAddress)	This method can be used by a caller to make sure a certain service is enabled at the given target node.
CoreHttpClient	httpClient(RequestTarget target)	Returns a client for issuing HTTP requests to servers in the cluster.
void	initGlobalConfig()	Instructs the client to, if possible, load and initialize the global config.
void	openBucket(String name)	Attempts to open a bucket and fails the Mono if there is a persistent error as the reason.
ValueRecorder	responseMetric(Request<?> request)
<R extends Response> void	send(Request<R> request)	Sends a command into the core layer and registers the request with the timeout timer.
<R extends Response> void	send(Request<R> request, boolean registerForTimeout)	Sends a command into the core layer and allows to avoid timeout registration.
Optional<Flux<ServiceState>>	serviceState(NodeIdentifier nodeIdentifier, ServiceType type, Optional<String> bucket)	If present, returns a flux that allows to monitor the state changes of a specific service.
Mono<Void>	shutdown()
Mono<Void>	shutdown(Duration timeout)	Shuts down this core and all associated, owned resources.
CoreTransactionsCleanup	transactionsCleanup()

Methods inherited from class java.lang.Object

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

Constructor Detail

Core

protected Core(CoreEnvironment environment,
               Authenticator authenticator,
               Set<SeedNode> seedNodes)

Creates a new Core.

Parameters:

environment - the environment for this core.

Method Detail

create

public static Core create(CoreEnvironment environment,
                          Authenticator authenticator,
                          Set<SeedNode> seedNodes)

Creates a new Core with the given environment.

Parameters:

environment - the environment for this core.

Returns:

the created Core.

configurationProvider

@Internal
public ConfigurationProvider configurationProvider()

Returns the attached configuration provider.

Internal API, use with care!

send

public <R extends Response> void send(Request<R> request)

Sends a command into the core layer and registers the request with the timeout timer.

Parameters:

request - the request to dispatch.

send

@Internal
public <R extends Response> void send(Request<R> request,
                                      boolean registerForTimeout)

Sends a command into the core layer and allows to avoid timeout registration.

Usually you want to use send(Request) instead, this method should only be used during retry situations where the request has already been registered with a timeout timer before.

Parameters:

request - the request to dispatch.

registerForTimeout - if the request should be registered with a timeout.

context

public CoreContext context()

Returns the CoreContext of this core instance.

httpClient

@Internal
public CoreHttpClient httpClient(RequestTarget target)

Returns a client for issuing HTTP requests to servers in the cluster.

diagnostics

@Internal
public Stream<EndpointDiagnostics> diagnostics()

serviceState

@Internal
public Optional<Flux<ServiceState>> serviceState(NodeIdentifier nodeIdentifier,
                                                 ServiceType type,
                                                 Optional<String> bucket)

If present, returns a flux that allows to monitor the state changes of a specific service.

Parameters:

nodeIdentifier - the node identifier for the node.

type - the type of service.

bucket - the bucket, if present.

Returns:

if found, a flux with the service states.

initGlobalConfig

@Internal
public void initGlobalConfig()

Instructs the client to, if possible, load and initialize the global config.

Since global configs are an "optional" feature depending on the cluster version, if an error happens this method will not fail. Rather it will log the exception (with some logic dependent on the type of error) and will allow the higher level components to move on where possible.

openBucket

@Internal
public void openBucket(String name)

Attempts to open a bucket and fails the Mono if there is a persistent error as the reason.

clusterConfig

@Internal
public ClusterConfig clusterConfig()

This API provides access to the current config that is published throughout the core.

Note that this is internal API and might change at any time.

ensureServiceAt

@Internal
public Mono<Void> ensureServiceAt(NodeIdentifier identifier,
                                  ServiceType serviceType,
                                  int port,
                                  Optional<String> bucket,
                                  Optional<String> alternateAddress)

This method can be used by a caller to make sure a certain service is enabled at the given target node.

This is advanced, internal functionality and should only be used if the caller knows what they are doing.

Parameters:

identifier - the node to check.

serviceType - the service type to enable if not enabled already.

port - the port where the service is listening on.

bucket - if the service is bound to a bucket, it needs to be provided.

alternateAddress - if an alternate address is present, needs to be provided since it is passed down to the node and its services.

Returns:

a Mono which completes once initiated.

responseMetric

@Internal
public ValueRecorder responseMetric(Request<?> request)

createNode

protected Node createNode(NodeIdentifier identifier,
                          Optional<String> alternateAddress)

Create a Node from the given identifier.

This method is here so it can be overridden in tests.

Parameters:

identifier - the identifier for the node.

alternateAddress - the alternate address if present.

Returns:

the created node instance.

shutdown

@Internal
public Mono<Void> shutdown()

shutdown

@Internal
public Mono<Void> shutdown(Duration timeout)

Shuts down this core and all associated, owned resources.

transactionsCleanup

@Internal
public CoreTransactionsCleanup transactionsCleanup()