| /** |
| * 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.file; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.impl.LoggingExceptionHandler; |
| import org.apache.camel.spi.ExceptionHandler; |
| import org.apache.camel.spi.Synchronization; |
| import org.apache.camel.util.ObjectHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * On completion strategy that performs the required work after the {@link Exchange} has been processed. |
| * <p/> |
| * The work is for example to move the processed file into a backup folder, delete the file or |
| * in case of processing failure do a rollback. |
| * |
| * @version |
| */ |
| public class GenericFileOnCompletion<T> implements Synchronization { |
| |
| private final transient Logger log = LoggerFactory.getLogger(GenericFileOnCompletion.class); |
| private GenericFileEndpoint<T> endpoint; |
| private GenericFileOperations<T> operations; |
| private ExceptionHandler exceptionHandler; |
| private GenericFile<T> file; |
| private String absoluteFileName; |
| |
| public GenericFileOnCompletion(GenericFileEndpoint<T> endpoint, GenericFileOperations<T> operations, |
| GenericFile<T> file, String absoluteFileName) { |
| this.endpoint = endpoint; |
| this.operations = operations; |
| this.file = file; |
| this.absoluteFileName = absoluteFileName; |
| } |
| |
| public void onComplete(Exchange exchange) { |
| onCompletion(exchange); |
| } |
| |
| public void onFailure(Exchange exchange) { |
| onCompletion(exchange); |
| } |
| |
| public ExceptionHandler getExceptionHandler() { |
| if (exceptionHandler == null) { |
| exceptionHandler = new LoggingExceptionHandler(getClass()); |
| } |
| return exceptionHandler; |
| } |
| |
| public void setExceptionHandler(ExceptionHandler exceptionHandler) { |
| this.exceptionHandler = exceptionHandler; |
| } |
| |
| protected void onCompletion(Exchange exchange) { |
| GenericFileProcessStrategy<T> processStrategy = endpoint.getGenericFileProcessStrategy(); |
| |
| if (log.isDebugEnabled()) { |
| log.debug("Done processing file: " + file + " using exchange: " + exchange); |
| } |
| |
| // commit or rollback |
| boolean committed = false; |
| try { |
| boolean failed = exchange.isFailed(); |
| if (!failed) { |
| // commit the file strategy if there was no failure or already handled by the DeadLetterChannel |
| processStrategyCommit(processStrategy, exchange, file); |
| committed = true; |
| } else { |
| if (exchange.getException() != null) { |
| // if the failure was an exception then handle it |
| handleException(exchange.getException()); |
| } |
| } |
| } finally { |
| if (!committed) { |
| processStrategyRollback(processStrategy, exchange, file); |
| } |
| |
| // remove file from the in progress list as its no longer in progress |
| // use the original file name that was used to add it to the repository |
| // as the name can be different when using preMove option |
| endpoint.getInProgressRepository().remove(absoluteFileName); |
| } |
| } |
| |
| /** |
| * Strategy when the file was processed and a commit should be executed. |
| * |
| * @param processStrategy the strategy to perform the commit |
| * @param exchange the exchange |
| * @param file the file processed |
| */ |
| protected void processStrategyCommit(GenericFileProcessStrategy<T> processStrategy, |
| Exchange exchange, GenericFile<T> file) { |
| if (endpoint.isIdempotent()) { |
| // only add to idempotent repository if we could process the file |
| endpoint.getIdempotentRepository().add(absoluteFileName); |
| } |
| |
| // delete done file if used |
| if (endpoint.getDoneFileName() != null) { |
| // done file must be in same path as the original input file |
| String doneFileName = endpoint.createDoneFileName(absoluteFileName); |
| ObjectHelper.notEmpty(doneFileName, "doneFileName", endpoint); |
| |
| try { |
| // delete done file |
| boolean deleted = operations.deleteFile(doneFileName); |
| if (log.isTraceEnabled()) { |
| log.trace("Done file: " + doneFileName + " was deleted: " + deleted); |
| } |
| if (!deleted) { |
| log.warn("Done file: " + doneFileName + " could not be deleted"); |
| } |
| } catch (Exception e) { |
| handleException(e); |
| } |
| } |
| |
| try { |
| if (log.isTraceEnabled()) { |
| log.trace("Commit file strategy: " + processStrategy + " for file: " + file); |
| } |
| processStrategy.commit(operations, endpoint, exchange, file); |
| } catch (Exception e) { |
| handleException(e); |
| } |
| |
| } |
| |
| /** |
| * Strategy when the file was not processed and a rollback should be executed. |
| * |
| * @param processStrategy the strategy to perform the commit |
| * @param exchange the exchange |
| * @param file the file processed |
| */ |
| protected void processStrategyRollback(GenericFileProcessStrategy<T> processStrategy, |
| Exchange exchange, GenericFile<T> file) { |
| |
| if (log.isWarnEnabled()) { |
| log.warn("Rollback file strategy: " + processStrategy + " for file: " + file); |
| } |
| try { |
| processStrategy.rollback(operations, endpoint, exchange, file); |
| } catch (Exception e) { |
| handleException(e); |
| } |
| } |
| |
| protected void handleException(Throwable t) { |
| Throwable newt = (t == null) ? new IllegalArgumentException("Handling [null] exception") : t; |
| getExceptionHandler().handleException(newt); |
| } |
| |
| @Override |
| public String toString() { |
| return "GenericFileOnCompletion"; |
| } |
| } |