| /* |
| * 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.camel.component.paxlogging; |
| |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| import java.util.concurrent.ExecutorService; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.support.DefaultConsumer; |
| import org.ops4j.pax.logging.spi.PaxAppender; |
| import org.ops4j.pax.logging.spi.PaxLoggingEvent; |
| import org.osgi.framework.ServiceRegistration; |
| |
| /** |
| * Paxlogging consumer. |
| * This camel consumer will register a paxlogging appender and will |
| * receive all logging events and send them into the route. |
| * To avoid generating new logging events from sending the message, |
| * an MDC attribute is set in the sending thread, and all log events |
| * from this thread are ignored. |
| * Camel exchanges are actually sent from a specific thread to make |
| * sure the log events are cleanly separated. |
| */ |
| public class PaxLoggingConsumer extends DefaultConsumer implements PaxAppender { |
| |
| private final PaxLoggingEndpoint endpoint; |
| private ExecutorService executor; |
| private ServiceRegistration registration; |
| |
| public PaxLoggingConsumer(PaxLoggingEndpoint endpoint, Processor processor) { |
| super(endpoint, processor); |
| this.endpoint = endpoint; |
| } |
| |
| public void doAppend(final PaxLoggingEvent paxLoggingEvent) { |
| // in order to "force" the copy of properties (especially the MDC ones) in the local thread |
| paxLoggingEvent.getProperties(); |
| sendExchange(paxLoggingEvent); |
| } |
| |
| protected void sendExchange(final PaxLoggingEvent paxLoggingEvent) { |
| Exchange exchange = endpoint.createExchange(); |
| // TODO: populate exchange headers |
| exchange.getIn().setBody(paxLoggingEvent); |
| |
| if (log.isTraceEnabled()) { |
| log.trace("PaxLogging {} is firing", endpoint.getAppender()); |
| } |
| try { |
| getProcessor().process(exchange); |
| } catch (Exception e) { |
| exchange.setException(e); |
| } |
| // log exception if an exception occurred and was not handled |
| if (exchange.getException() != null) { |
| getExceptionHandler().handleException("Error processing exchange", exchange, exchange.getException()); |
| } |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| super.doStart(); |
| |
| // start the executor before the registration |
| executor = endpoint.getCamelContext().getExecutorServiceManager().newSingleThreadExecutor(this, "PaxLoggingEventTask"); |
| |
| Dictionary<String, String> props = new Hashtable<>(); |
| props.put("org.ops4j.pax.logging.appender.name", endpoint.getAppender()); |
| registration = endpoint.getComponent().getBundleContext().registerService(PaxAppender.class.getName(), this, props); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| if (registration != null) { |
| registration.unregister(); |
| } |
| if (executor != null) { |
| endpoint.getCamelContext().getExecutorServiceManager().shutdownNow(executor); |
| executor = null; |
| } |
| super.doStop(); |
| } |
| } |