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.camel.main; 018 019import java.util.EventObject; 020import java.util.concurrent.CountDownLatch; 021import java.util.concurrent.ScheduledExecutorService; 022import java.util.concurrent.TimeUnit; 023import java.util.concurrent.atomic.AtomicBoolean; 024 025import org.apache.camel.CamelContext; 026import org.apache.camel.management.event.ExchangeCompletedEvent; 027import org.apache.camel.management.event.ExchangeCreatedEvent; 028import org.apache.camel.management.event.ExchangeFailedEvent; 029import org.apache.camel.support.EventNotifierSupport; 030import org.apache.camel.util.StopWatch; 031import org.slf4j.Logger; 032import org.slf4j.LoggerFactory; 033 034/** 035 * A {@link org.apache.camel.spi.EventNotifier} to trigger shutdown of the Main JVM 036 * when maximum number of messages has been processed. 037 */ 038public class MainDurationEventNotifier extends EventNotifierSupport { 039 040 private static final Logger LOG = LoggerFactory.getLogger(MainLifecycleStrategy.class); 041 private final CamelContext camelContext; 042 private final int maxMessages; 043 private final long maxIdleSeconds; 044 private final AtomicBoolean completed; 045 private final CountDownLatch latch; 046 private final boolean stopCamelContext; 047 048 private volatile int doneMessages; 049 private volatile StopWatch watch; 050 private volatile ScheduledExecutorService executorService; 051 052 public MainDurationEventNotifier(CamelContext camelContext, int maxMessages, long maxIdleSeconds, 053 AtomicBoolean completed, CountDownLatch latch, boolean stopCamelContext) { 054 this.camelContext = camelContext; 055 this.maxMessages = maxMessages; 056 this.maxIdleSeconds = maxIdleSeconds; 057 this.completed = completed; 058 this.latch = latch; 059 this.stopCamelContext = stopCamelContext; 060 } 061 062 @Override 063 public void notify(EventObject event) throws Exception { 064 boolean begin = event instanceof ExchangeCreatedEvent; 065 boolean complete = event instanceof ExchangeCompletedEvent || event instanceof ExchangeFailedEvent; 066 067 if (maxMessages > 0 && complete) { 068 doneMessages++; 069 070 boolean result = doneMessages >= maxMessages; 071 LOG.trace("Duration max messages check {} >= {} -> {}", doneMessages, maxMessages, result); 072 073 if (result) { 074 if (completed.compareAndSet(false, true)) { 075 LOG.info("Duration max messages triggering shutdown of the JVM."); 076 try { 077 // shutting down CamelContext 078 if (stopCamelContext) { 079 camelContext.stop(); 080 } 081 } catch (Exception e) { 082 LOG.warn("Error during stopping CamelContext. This exception is ignored.", e); 083 } finally { 084 // trigger stopping the Main 085 latch.countDown(); 086 } 087 } 088 } 089 } 090 091 // idle reacts on both incoming and complete messages 092 if (maxIdleSeconds > 0 && (begin || complete)) { 093 LOG.trace("Message activity so restarting stop watch"); 094 watch.restart(); 095 } 096 } 097 098 @Override 099 public boolean isEnabled(EventObject event) { 100 return event instanceof ExchangeCompletedEvent || event instanceof ExchangeFailedEvent; 101 } 102 103 @Override 104 public String toString() { 105 return "MainDurationEventNotifier[" + maxMessages + " max messages]"; 106 } 107 108 @Override 109 protected void doStart() throws Exception { 110 if (maxIdleSeconds > 0) { 111 112 // we only start watch when Camel is started 113 camelContext.addStartupListener((context, alreadyStarted) -> watch = new StopWatch()); 114 115 // okay we need to trigger on idle after X period, and therefore we need a background task that checks this 116 executorService = camelContext.getExecutorServiceManager().newSingleThreadScheduledExecutor(this, "MainDurationIdleChecker"); 117 Runnable task = () -> { 118 if (watch == null) { 119 // camel has not been started yet 120 return; 121 } 122 123 // any inflight messages currently 124 int inflight = camelContext.getInflightRepository().size(); 125 if (inflight > 0) { 126 LOG.trace("Duration max idle check is skipped due {} inflight messages", inflight); 127 return; 128 } 129 130 long seconds = watch.taken() / 1000; 131 boolean result = seconds >= maxIdleSeconds; 132 LOG.trace("Duration max idle check {} >= {} -> {}", seconds, maxIdleSeconds, result); 133 134 if (result) { 135 if (completed.compareAndSet(false, true)) { 136 LOG.info("Duration max idle triggering shutdown of the JVM."); 137 try { 138 // shutting down CamelContext 139 if (stopCamelContext) { 140 camelContext.stop(); 141 } 142 } catch (Exception e) { 143 LOG.warn("Error during stopping CamelContext. This exception is ignored.", e); 144 } finally { 145 // trigger stopping the Main 146 latch.countDown(); 147 } 148 } 149 } 150 }; 151 executorService.scheduleAtFixedRate(task, 1, 1, TimeUnit.SECONDS); 152 } 153 } 154 155}