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     */
017    package org.apache.camel.component.file.remote;
018    
019    import org.apache.camel.Consumer;
020    import org.apache.camel.Endpoint;
021    import org.apache.camel.impl.DefaultPollingConsumerPollStrategy;
022    
023    /**
024     * Remote file consumer polling strategy that attempts to help recovering from lost connections.
025     *
026     * @version 
027     */
028    public class RemoteFilePollingConsumerPollStrategy extends DefaultPollingConsumerPollStrategy {
029    
030        @Override
031        public boolean rollback(Consumer consumer, Endpoint endpoint, int retryCounter, Exception e) throws Exception {
032            RemoteFileConsumer rfc = (RemoteFileConsumer) consumer;
033    
034            // only try to recover if we are allowed to run
035            if (((RemoteFileConsumer) consumer).isRunAllowed()) {
036                // disconnect from the server to force it to re login at next poll to recover
037                log.warn("Trying to recover by disconnecting from remote server forcing a re-connect at next poll: " + rfc.remoteServer());
038                try {
039                    rfc.disconnect();
040                } catch (Throwable t) {
041                    // ignore the exception
042                    log.debug("Error occurred during disconnect from: " + rfc.remoteServer() + ". This exception will be ignored.", t);
043                }
044            }
045    
046            return super.rollback(consumer, endpoint, retryCounter, e);
047        }
048    
049    }