ForwardingLoadBalancerHelper (grpc-all 1.31.1 API)

java.lang.Object
- io.grpc.LoadBalancer.Helper
- - io.grpc.util.ForwardingLoadBalancerHelper

@ExperimentalApi(value="https://github.com/grpc/grpc-java/issues/1771")
public abstract class ForwardingLoadBalancerHelper
extends LoadBalancer.Helper

Constructor Summary

Constructors
Constructor and Description

ForwardingLoadBalancerHelper()

Constructors
Constructor and Description
`ForwardingLoadBalancerHelper()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`ManagedChannel`	`createOobChannel(EquivalentAddressGroup eag, String authority)` Out-of-band channel for LoadBalancer’s own RPC needs, e.g., talking to an external load-balancer service.
`ManagedChannel`	`createResolvingOobChannel(String target)` Creates an out-of-band channel for LoadBalancer's own RPC needs, e.g., talking to an external load-balancer service, that is specified by a target string.
`ManagedChannelBuilder<?>`	`createResolvingOobChannelBuilder(String target)` Creates an out-of-band channel builder for LoadBalancer's own RPC needs, e.g., talking to an external load-balancer service, that is specified by a target string.
`LoadBalancer.Subchannel`	`createSubchannel(List<EquivalentAddressGroup> addrs, Attributes attrs)` Deprecated.
`LoadBalancer.Subchannel`	`createSubchannel(LoadBalancer.CreateSubchannelArgs args)` Creates a Subchannel, which is a logical connection to the given group of addresses which are considered equivalent.
`protected abstract LoadBalancer.Helper`	`delegate()` Returns the underlying helper.
`String`	`getAuthority()` Returns the authority string of the channel, which is derived from the DNS-style target name.
`ChannelLogger`	`getChannelLogger()` Returns the `ChannelLogger` for the Channel served by this LoadBalancer.
`NameResolver.Args`	`getNameResolverArgs()` Returns the `NameResolver.Args` that the Channel uses to create `NameResolver`s.
`NameResolver.Factory`	`getNameResolverFactory()` Deprecated.
`NameResolverRegistry`	`getNameResolverRegistry()` Returns the `NameResolverRegistry` that the Channel uses to look for `NameResolver`s.
`ScheduledExecutorService`	`getScheduledExecutorService()` Returns a `ScheduledExecutorService` for scheduling delayed tasks.
`SynchronizationContext`	`getSynchronizationContext()` Returns a `SynchronizationContext` that runs tasks in the same Synchronization Context as that the callback methods on the `LoadBalancer` interface are run in.
`void`	`refreshNameResolution()` Call `NameResolver.refresh()` on the channel's resolver.
`void`	`runSerialized(Runnable task)` Deprecated.
`String`	`toString()`
`void`	`updateBalancingState(ConnectivityState newState, LoadBalancer.SubchannelPicker newPicker)` Set a new state with a new picker to the channel.
`void`	`updateOobChannelAddresses(ManagedChannel channel, EquivalentAddressGroup eag)` Updates the addresses used for connections in the `Channel` that was created by `LoadBalancer.Helper.createOobChannel(EquivalentAddressGroup, String)`.
`void`	`updateSubchannelAddresses(LoadBalancer.Subchannel subchannel, List<EquivalentAddressGroup> addrs)` Deprecated.

Methods inherited from class io.grpc.LoadBalancer.Helper
createSubchannel, updateSubchannelAddresses

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ForwardingLoadBalancerHelper
```
public ForwardingLoadBalancerHelper()
```
- Method Detail
  - delegate
```
protected abstract LoadBalancer.Helper delegate()
```
    Returns the underlying helper.
  - createSubchannel
```
@Deprecated
public LoadBalancer.Subchannel createSubchannel(List<EquivalentAddressGroup> addrs,
                                                            Attributes attrs)
```
    Deprecated.
    
    Description copied from class: LoadBalancer.Helper
    
    Creates a Subchannel, which is a logical connection to the given group of addresses which are considered equivalent. The attrs are custom attributes associated with this Subchannel, and can be accessed later through Subchannel.getAttributes().
    It is recommended you call this method from the Synchronization Context, otherwise your logic around the creation may race with LoadBalancer.handleSubchannelState(io.grpc.LoadBalancer.Subchannel, io.grpc.ConnectivityStateInfo). See #5015 for more discussions.
    The LoadBalancer is responsible for closing unused Subchannels, and closing all Subchannels within LoadBalancer.shutdown().
    
    Overrides:
    
    createSubchannel in class LoadBalancer.Helper
  - createSubchannel
```
public LoadBalancer.Subchannel createSubchannel(LoadBalancer.CreateSubchannelArgs args)
```
    Description copied from class: LoadBalancer.Helper
    
    Creates a Subchannel, which is a logical connection to the given group of addresses which are considered equivalent. The attrs are custom attributes associated with this Subchannel, and can be accessed later through Subchannel.getAttributes().
    The LoadBalancer is responsible for closing unused Subchannels, and closing all Subchannels within LoadBalancer.shutdown().
    It must be called from the Synchronization Context
    
    Overrides:
    
    createSubchannel in class LoadBalancer.Helper
  - updateSubchannelAddresses
```
@Deprecated
public void updateSubchannelAddresses(LoadBalancer.Subchannel subchannel,
                                                  List<EquivalentAddressGroup> addrs)
```
    Deprecated.
    
    Description copied from class: LoadBalancer.Helper
    
    Replaces the existing addresses used with subchannel. This method is superior to LoadBalancer.Helper.createSubchannel(io.grpc.EquivalentAddressGroup, io.grpc.Attributes) when the new and old addresses overlap, since the subchannel can continue using an existing connection.
    It should be called from the Synchronization Context. Currently will log a warning if violated. It will become an exception eventually. See #5015 for the background.
    
    Overrides:
    
    updateSubchannelAddresses in class LoadBalancer.Helper
  - createOobChannel
```
public ManagedChannel createOobChannel(EquivalentAddressGroup eag,
                                       String authority)
```
    Description copied from class: LoadBalancer.Helper
    
    Out-of-band channel for LoadBalancer’s own RPC needs, e.g., talking to an external load-balancer service.
    The LoadBalancer is responsible for closing unused OOB channels, and closing all OOB channels within LoadBalancer.shutdown().
    
    Specified by:
    
    createOobChannel in class LoadBalancer.Helper
  - updateOobChannelAddresses
```
public void updateOobChannelAddresses(ManagedChannel channel,
                                      EquivalentAddressGroup eag)
```
    Description copied from class: LoadBalancer.Helper
    
    Updates the addresses used for connections in the Channel that was created by LoadBalancer.Helper.createOobChannel(EquivalentAddressGroup, String). This is superior to LoadBalancer.Helper.createOobChannel(EquivalentAddressGroup, String) when the old and new addresses overlap, since the channel can continue using an existing connection.
    
    Overrides:
    
    updateOobChannelAddresses in class LoadBalancer.Helper
  - createResolvingOobChannelBuilder
```
public ManagedChannelBuilder<?> createResolvingOobChannelBuilder(String target)
```
    Description copied from class: LoadBalancer.Helper
    
    Creates an out-of-band channel builder for LoadBalancer's own RPC needs, e.g., talking to an external load-balancer service, that is specified by a target string. See the documentation on ManagedChannelBuilder.forTarget(java.lang.String) for the format of a target string.
    The target string will be resolved by a NameResolver created according to the target string.
    The LoadBalancer is responsible for closing unused OOB channels, and closing all OOB channels within LoadBalancer.shutdown().
    
    Overrides:
    
    createResolvingOobChannelBuilder in class LoadBalancer.Helper
  - createResolvingOobChannel
```
public ManagedChannel createResolvingOobChannel(String target)
```
    Description copied from class: LoadBalancer.Helper
    
    Creates an out-of-band channel for LoadBalancer's own RPC needs, e.g., talking to an external load-balancer service, that is specified by a target string. See the documentation on ManagedChannelBuilder.forTarget(java.lang.String) for the format of a target string.
    The target string will be resolved by a NameResolver created according to the target string.
    The LoadBalancer is responsible for closing unused OOB channels, and closing all OOB channels within LoadBalancer.shutdown().
    
    Overrides:
    
    createResolvingOobChannel in class LoadBalancer.Helper
  - updateBalancingState
```
public void updateBalancingState(ConnectivityState newState,
                                 LoadBalancer.SubchannelPicker newPicker)
```
    Description copied from class: LoadBalancer.Helper
    
    Set a new state with a new picker to the channel.
    When a new picker is provided via updateBalancingState(), the channel will apply the picker on all buffered RPCs, by calling LoadBalancer.SubchannelPicker.pickSubchannel( LoadBalancer.PickSubchannelArgs).
    The channel will hold the picker and use it for all RPCs, until updateBalancingState() is called again and a new picker replaces the old one. If updateBalancingState() has never been called, the channel will buffer all RPCs until a picker is provided.
    It should be called from the Synchronization Context. Currently will log a warning if violated. It will become an exception eventually. See #5015 for the background.
    The passed state will be the channel's new state. The SHUTDOWN state should not be passed and its behavior is undefined.
    
    Specified by:
    
    updateBalancingState in class LoadBalancer.Helper
  - refreshNameResolution
```
public void refreshNameResolution()
```
    Description copied from class: LoadBalancer.Helper
    
    Call NameResolver.refresh() on the channel's resolver.
    It should be called from the Synchronization Context. Currently will log a warning if violated. It will become an exception eventually. See #5015 for the background.
    
    Overrides:
    
    refreshNameResolution in class LoadBalancer.Helper
  - runSerialized
```
@Deprecated
public void runSerialized(Runnable task)
```
    Deprecated.
    
    Description copied from class: LoadBalancer.Helper
    
    Schedule a task to be run in the Synchronization Context, which serializes the task with the callback methods on the LoadBalancer interface.
    
    Overrides:
    
    runSerialized in class LoadBalancer.Helper
  - getNameResolverFactory
```
@Deprecated
public NameResolver.Factory getNameResolverFactory()
```
    Deprecated.
    
    Description copied from class: LoadBalancer.Helper
    
    Returns the NameResolver of the channel.
    
    Specified by:
    
    getNameResolverFactory in class LoadBalancer.Helper
  - getAuthority
```
public String getAuthority()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns the authority string of the channel, which is derived from the DNS-style target name.
    
    Specified by:
    
    getAuthority in class LoadBalancer.Helper
  - getSynchronizationContext
```
public SynchronizationContext getSynchronizationContext()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns a SynchronizationContext that runs tasks in the same Synchronization Context as that the callback methods on the LoadBalancer interface are run in.
    Pro-tip: in order to call SynchronizationContext.schedule(java.lang.Runnable, long, java.util.concurrent.TimeUnit, java.util.concurrent.ScheduledExecutorService), you need to provide a ScheduledExecutorService. LoadBalancer.Helper.getScheduledExecutorService() is provided for your convenience.
    
    Overrides:
    
    getSynchronizationContext in class LoadBalancer.Helper
  - getScheduledExecutorService
```
public ScheduledExecutorService getScheduledExecutorService()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns a ScheduledExecutorService for scheduling delayed tasks.
    This service is a shared resource and is only meant for quick tasks. DO NOT block or run time-consuming tasks.
    The returned service doesn't support shutdown() and shutdownNow(). They will throw if called.
    
    Overrides:
    
    getScheduledExecutorService in class LoadBalancer.Helper
  - getChannelLogger
```
public ChannelLogger getChannelLogger()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns the ChannelLogger for the Channel served by this LoadBalancer.
    
    Overrides:
    
    getChannelLogger in class LoadBalancer.Helper
  - getNameResolverArgs
```
public NameResolver.Args getNameResolverArgs()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns the NameResolver.Args that the Channel uses to create NameResolvers.
    
    Overrides:
    
    getNameResolverArgs in class LoadBalancer.Helper
  - getNameResolverRegistry
```
public NameResolverRegistry getNameResolverRegistry()
```
    Description copied from class: LoadBalancer.Helper
    
    Returns the NameResolverRegistry that the Channel uses to look for NameResolvers.
    
    Overrides:
    
    getNameResolverRegistry in class LoadBalancer.Helper
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class ForwardingLoadBalancerHelper

Constructor Summary

Method Summary

Methods inherited from class io.grpc.LoadBalancer.Helper

Methods inherited from class java.lang.Object

Constructor Detail

ForwardingLoadBalancerHelper

Method Detail

delegate

createSubchannel

createSubchannel

updateSubchannelAddresses

createOobChannel

updateOobChannelAddresses

createResolvingOobChannelBuilder

createResolvingOobChannel

updateBalancingState

refreshNameResolution

runSerialized

getNameResolverFactory

getAuthority

getSynchronizationContext

getScheduledExecutorService

getChannelLogger

getNameResolverArgs

getNameResolverRegistry

toString