| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.solr.cloud.autoscaling; |
| |
| import java.io.Closeable; |
| |
| import org.apache.solr.client.solrj.cloud.autoscaling.AutoScalingConfig; |
| import org.apache.solr.client.solrj.cloud.SolrCloudManager; |
| import org.apache.solr.client.solrj.cloud.autoscaling.TriggerEventProcessorStage; |
| import org.apache.solr.core.SolrResourceLoader; |
| |
| /** |
| * Implementations of this interface are notified of stages in event processing that they were |
| * registered for. Note: instances may be closed and re-created on each auto-scaling config update. |
| * |
| * @deprecated to be removed in Solr 9.0 (see SOLR-14656) |
| */ |
| public interface TriggerListener extends Closeable { |
| |
| /** |
| * Called when listener is created but before it's initialized and used. |
| * This method should also verify that the configuration parameters are correct. |
| * It may be called multiple times. |
| * @param loader loader to use for instantiating sub-components |
| * @param cloudManager current instance of SolrCloudManager |
| * @param config coniguration |
| * @throws TriggerValidationException contains details of invalid configuration parameters. |
| */ |
| void configure(SolrResourceLoader loader, SolrCloudManager cloudManager, AutoScalingConfig.TriggerListenerConfig config) throws TriggerValidationException; |
| |
| /** |
| * If this method returns false then the listener's {@link #onEvent(TriggerEvent, TriggerEventProcessorStage, String, ActionContext, Throwable, String)} |
| * method should not be called. |
| */ |
| boolean isEnabled(); |
| |
| void init() throws Exception; |
| |
| AutoScalingConfig.TriggerListenerConfig getConfig(); |
| |
| /** |
| * This method is called when either a particular <code>stage</code> or |
| * <code>actionName</code> is reached during event processing. |
| * @param event current event being processed |
| * @param stage {@link TriggerEventProcessorStage} that this listener was registered for, or null |
| * @param actionName {@link TriggerAction} name that this listener was registered for, or null |
| * @param context optional {@link ActionContext} when the processing stage is related to an action, or null |
| * @param error optional {@link Throwable} error, or null |
| * @param message optional message |
| */ |
| void onEvent(TriggerEvent event, TriggerEventProcessorStage stage, String actionName, ActionContext context, |
| Throwable error, String message) throws Exception; |
| } |