Package com.yahoo.config.subscription.impl

Class GenericConfigSubscriber

java.lang.Object

com.yahoo.config.subscription.ConfigSubscriber

com.yahoo.config.subscription.impl.GenericConfigSubscriber

All Implemented Interfaces:

AutoCloseable

public class GenericConfigSubscriber
extends ConfigSubscriber

A subscriber that can subscribe without the class. Used by config proxy.

Author:

Vegard Havdal

Nested Class Summary

Nested classes/interfaces inherited from class com.yahoo.config.subscription.ConfigSubscriber

ConfigSubscriber.SingleSubscriber<T extends com.yahoo.config.ConfigInstance>, ConfigSubscriber.State

Field Summary

Fields inherited from class com.yahoo.config.subscription.ConfigSubscriber

subscriptionHandles

Constructor Summary

Constructors

Constructor	Description
GenericConfigSubscriber(JRTConfigRequester requester)	Constructs a new subscriber using the given pool of requesters (JRTConfigRequester holds 1 connection which in turn is subject to failover across the elements in the source set.) The behaviour is undefined if the map key is different from the source set the requester was built with.

Method Summary

Modifier and Type	Method	Description
void	closeRequesters()	Do nothing, since we share requesters
<T extends com.yahoo.config.ConfigInstance> ConfigHandle<T>	subscribe(ConfigSubscriber.SingleSubscriber<T> singleSubscriber, Class<T> configClass, String configId)	Convenience method that can be used if you only want to subscribe to one config, and want generic error handling.
GenericConfigHandle	subscribe(ConfigKey<RawConfig> key, List<String> defContent, TimingValues timingValues)	Subscribes to config without using the class.
<T extends com.yahoo.config.ConfigInstance> ConfigHandle<T>	subscribe(Class<T> configClass, String configId)	Subscribes on the given type of ConfigInstance with the given config id.
<T extends com.yahoo.config.ConfigInstance> ConfigHandle<T>	subscribe(Class<T> configClass, String configId, long timeoutMillis)	Subscribes on the given type of ConfigInstance with the given config id and subscribe timeout.

Methods inherited from class com.yahoo.config.subscription.ConfigSubscriber

checkStateBeforeSubscribe, close, finalize, getGeneration, isClosed, nextConfig, nextConfig, nextGeneration, nextGeneration, reload, startConfigThread, state, subscribeAndHandleErrors, throwIfExceptionSet, toString

Methods inherited from class java.lang.Object

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

Constructor Details

GenericConfigSubscriber

public GenericConfigSubscriber(JRTConfigRequester requester)

Constructs a new subscriber using the given pool of requesters (JRTConfigRequester holds 1 connection which in turn is subject to failover across the elements in the source set.) The behaviour is undefined if the map key is different from the source set the requester was built with. See also JRTConfigRequester(com.yahoo.vespa.config.ConnectionPool, com.yahoo.vespa.config.TimingValues)

Parameters:

requester - a config requester

Method Details

subscribe

public GenericConfigHandle subscribe(ConfigKey<RawConfig> key,
 List<String> defContent,
 TimingValues timingValues)

Subscribes to config without using the class. For internal use in config proxy.

Parameters:

key - the to subscribe to

defContent - the config definition content for the config to subscribe to

timingValues - TimingValues

Returns:

generic handle

subscribe

public <T extends com.yahoo.config.ConfigInstance>
ConfigHandle<T> subscribe(Class<T> configClass,
 String configId)

Description copied from class: ConfigSubscriber

Subscribes on the given type of ConfigInstance with the given config id. The method blocks until the first config is ready to be fetched with ConfigSubscriber.nextConfig(boolean).

Overrides:

subscribe in class ConfigSubscriber

Parameters:

configClass - The class, typically generated from a def-file using config-class-plugin

configId - Identifies the service in vespa-services.xml, or null if you are using a local ConfigSource which does not use config id. Also supported: raw:, file:, dir: or jar: config id which addresses config locally in the same way.

Returns:

a ConfigHandle

subscribe

public <T extends com.yahoo.config.ConfigInstance>
ConfigHandle<T> subscribe(Class<T> configClass,
 String configId,
 long timeoutMillis)

Description copied from class: ConfigSubscriber

Subscribes on the given type of ConfigInstance with the given config id and subscribe timeout. The method blocks until the first config is ready to be fetched with ConfigSubscriber.nextConfig(boolean).

Overrides:

subscribe in class ConfigSubscriber

Parameters:

configClass - The class, typically generated from a def-file using config-class-plugin

configId - Identifies the service in vespa-services.xml, or possibly raw:, file:, dir: or jar: type config which addresses config locally.

timeoutMillis - The time to wait for a config to become available, in milliseconds

Returns:

a ConfigHandle

subscribe

public <T extends com.yahoo.config.ConfigInstance>
ConfigHandle<T> subscribe(ConfigSubscriber.SingleSubscriber<T> singleSubscriber,
 Class<T> configClass,
 String configId)

Description copied from class: ConfigSubscriber

Convenience method that can be used if you only want to subscribe to one config, and want generic error handling. Implement ConfigSubscriber.SingleSubscriber and pass it to this method. You will get initial config, and a config thread will be started. The method will throw in your thread if initial configuration fails, and the config thread will print a generic error message (but continue) if it fails thereafter. The config thread will stop if you ConfigSubscriber.close() this ConfigSubscriber.

Overrides:

subscribe in class ConfigSubscriber

Type Parameters:

T - ConfigInstance type

Parameters:

singleSubscriber - The object to receive config

configClass - The class, typically generated from a def-file using config-class-plugin

configId - Identifies the service in vespa-services.xml

Returns:

The handle of the config

See Also:

• ConfigSubscriber.startConfigThread(Runnable)

closeRequesters

public void closeRequesters()

Do nothing, since we share requesters