001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.store; 018 019import org.apache.activemq.broker.ConnectionContext; 020import org.apache.activemq.command.Message; 021 022/** 023 * callback when the index is updated, allows ordered work to be seen by destinations 024 */ 025public interface IndexListener { 026 027 final class MessageContext { 028 public final Message message; 029 public final ConnectionContext context; 030 public final Runnable onCompletion; 031 public boolean duplicate; 032 033 public MessageContext(ConnectionContext context, Message message, Runnable onCompletion) { 034 this.context = context; 035 this.message = message; 036 this.onCompletion = onCompletion; 037 } 038 } 039 040 /** 041 * called with some global index lock held so that a listener can do order 042 * dependent work 043 * non null MessageContext.onCompletion called when work is done 044 */ 045 public void onAdd(MessageContext messageContext); 046 047}