Gemfire JavaDocs_test

ServerLoadProbe (Tanzu GemFire 10.1.2)

All Superinterfaces:

CacheCallback, Declarable

All Known Implementing Classes:

ServerLoadProbeAdapter
```
public interface ServerLoadProbe
extends CacheCallback
```
A load probe is installed in a cache server to measure the load on the cache server for balancing load between multiple cache servers.
The getLoad method will be called once per poll interval see CacheServer.setLoadPollInterval(long) The ServerLoad object returned by the getLoad method will be sent to the locator every time the load for this server changes. To conserve bandwidth, it's a good idea to round the load calculations so that the load will not be sent too frequently.
The ServerLoad object contains two floating point numbers indicating the load on the server due to client to server connections and due to subscription connections. When routing a connection, the locator will choose the server that has the lowest load.
It is generally a good idea to pick a load function where 0 connections corresponds to 0 load. The default gemfire load probes return a fraction between 0 and 1, where 0 indicates no load, and 1 indicates the server is completely loaded.
Because cache servers can be stopped, reconfigured, and restarted, the open and close methods on this callback can be called several times. If the same callback object is installed on multiple cache servers, open and close will be called once for each cache server.

Since:

GemFire 5.7

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Signals that a cache server using this load probe has been closed.
`ServerLoad`	`getLoad(ServerMetrics metrics)`	Get the load on this server.
`void`	`open()`	Signals that a cache server using this load probe has been started.

Methods inherited from interface org.apache.geode.cache.Declarable
init, initialize

- Method Detail
  - getLoad
```
ServerLoad getLoad(ServerMetrics metrics)
```
    Get the load on this server. This method will be called once every pool interval.
    
    Parameters:
    
    metrics - the ServerMetrics for the server
    
    Returns:
    
    The current load on this server.
  - open
```
void open()
```
    Signals that a cache server using this load probe has been started.
  - close
```
void close()
```
    Signals that a cache server using this load probe has been closed.
    
    Specified by:
    
    close in interface CacheCallback
    
    See Also:
    
    RegionService.close(), Region.close(), Region.localDestroyRegion(), Region.destroyRegion(), AttributesMutator

Node: apidepo-liferay-dxp-v1-be-w-1:8080: