org.apache.solr.cloud.autoscaling

Class HttpTriggerListener

java.lang.Object

org.apache.solr.cloud.autoscaling.TriggerListenerBase

org.apache.solr.cloud.autoscaling.HttpTriggerListener

All Implemented Interfaces:

Closeable, AutoCloseable, TriggerListener

public class HttpTriggerListener
extends TriggerListenerBase

Simple HTTP callback that POSTs event data to a URL. URL, payload and headers may contain property substitution patterns, with the following properties available:

• config.* - listener configuration
• event.* - event properties
• stage - current stage of event processing
• actionName - optional current action name
• context.* - optional ActionContext properties
• error - optional error string (from Throwable.toString())
• message - optional message

The following listener configuration is supported:

• url - a URL template
• payload - string, optional payload template. If absent a JSON map of all properties listed above will be used.
• contentType - string, optional payload content type. If absent then application/json will be used.
• header.* - string, optional header template(s). The name of the property without "header." prefix defines the literal header name.
• timeout - int, optional connection and socket timeout in milliseconds. Default is 60 seconds.
• followRedirects - boolean, optional setting to follow redirects. Default is false.

Field Summary

Fields inherited from class org.apache.solr.cloud.autoscaling.TriggerListenerBase

config, coreContainer

Constructor Summary

Constructors

Constructor and Description
HttpTriggerListener()

Method Summary

Modifier and Type	Method and Description
void	init(CoreContainer coreContainer, AutoScalingConfig.TriggerListenerConfig config)
void	onEvent(TriggerEvent event, TriggerEventProcessorStage stage, String actionName, ActionContext context, Throwable error, String message) This method is called when either a particular stage or actionName is reached during event processing.

Methods inherited from class org.apache.solr.cloud.autoscaling.TriggerListenerBase

close, getConfig

Methods inherited from class java.lang.Object

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

Constructor Detail

HttpTriggerListener

public HttpTriggerListener()

Method Detail

init

public void init(CoreContainer coreContainer,
                 AutoScalingConfig.TriggerListenerConfig config)

Specified by:

init in interface TriggerListener

Overrides:

init in class TriggerListenerBase

onEvent

public void onEvent(TriggerEvent event,
                    TriggerEventProcessorStage stage,
                    String actionName,
                    ActionContext context,
                    Throwable error,
                    String message)

Description copied from interface: TriggerListener

This method is called when either a particular stage or actionName is reached during event processing.

Parameters:

event - current event being processed

stage - TriggerEventProcessorStage that this listener was registered for, or null

actionName - TriggerAction name that this listener was registered for, or null

context - optional ActionContext when the processing stage is related to an action, or null

error - optional Throwable error, or null

message - optional message