public void writeFile(Exchange exchange, String fileName)
throws GenericFileOperationFailedException {
// build directory if auto create is enabled
if (endpoint.isAutoCreate()) {
// we must normalize it (to avoid having both \ and / in the name which confuses java.io.File)
String name = FileUtil.normalizePath(fileName);
// use java.io.File to compute the file path
File file = new File(name);
String directory = file.getParent();
boolean absolute = FileUtil.isAbsolute(file);
if (directory != null) {
if (!operations.buildDirectory(directory, absolute)) {
log.debug(
"Cannot build directory [{}] (could be because of denied permissions)", directory);
}
}
}
// upload
if (log.isTraceEnabled()) {
log.trace(
"About to write [{}] to [{}] from exchange [{}]",
new Object[] {fileName, getEndpoint(), exchange});
}
boolean success = operations.storeFile(fileName, exchange);
if (!success) {
throw new GenericFileOperationFailedException("Error writing file [" + fileName + "]");
}
log.debug("Wrote [{}] to [{}]", fileName, getEndpoint());
}
/**
* Perform the work to process the fileExchange
*
* @param exchange fileExchange
* @param target the target filename
* @throws Exception is thrown if some error
*/
protected void processExchange(Exchange exchange, String target) throws Exception {
log.trace("Processing file: {} for exchange: {}", target, exchange);
try {
preWriteCheck();
// should we write to a temporary name and then afterwards rename to real target
boolean writeAsTempAndRename = ObjectHelper.isNotEmpty(endpoint.getTempFileName());
String tempTarget = null;
// remember if target exists to avoid checking twice
Boolean targetExists = null;
if (writeAsTempAndRename) {
// compute temporary name with the temp prefix
tempTarget = createTempFileName(exchange, target);
log.trace("Writing using tempNameFile: {}", tempTarget);
// if we should eager delete target file before deploying temporary file
if (endpoint.getFileExist() != GenericFileExist.TryRename
&& endpoint.isEagerDeleteTargetFile()) {
// cater for file exists option on the real target as
// the file operations code will work on the temp file
// if an existing file already exists what should we do?
targetExists = operations.existsFile(target);
if (targetExists) {
log.trace("EagerDeleteTargetFile, target exists");
if (endpoint.getFileExist() == GenericFileExist.Ignore) {
// ignore but indicate that the file was written
log.trace(
"An existing file already exists: {}. Ignore and do not override it.", target);
return;
} else if (endpoint.getFileExist() == GenericFileExist.Fail) {
throw new GenericFileOperationFailedException(
"File already exist: " + target + ". Cannot write new file.");
} else if (endpoint.isEagerDeleteTargetFile()
&& endpoint.getFileExist() == GenericFileExist.Override) {
// we override the target so we do this by deleting it so the temp file can be renamed
// later
// with success as the existing target file have been deleted
log.trace("Eagerly deleting existing file: {}", target);
if (!operations.deleteFile(target)) {
throw new GenericFileOperationFailedException("Cannot delete file: " + target);
}
}
}
}
// delete any pre existing temp file
if (operations.existsFile(tempTarget)) {
log.trace("Deleting existing temp file: {}", tempTarget);
if (!operations.deleteFile(tempTarget)) {
throw new GenericFileOperationFailedException("Cannot delete file: " + tempTarget);
}
}
}
// write/upload the file
writeFile(exchange, tempTarget != null ? tempTarget : target);
// if we did write to a temporary name then rename it to the real
// name after we have written the file
if (tempTarget != null) {
// if we did not eager delete the target file
if (endpoint.getFileExist() != GenericFileExist.TryRename
&& !endpoint.isEagerDeleteTargetFile()) {
// if an existing file already exists what should we do?
targetExists = operations.existsFile(target);
if (targetExists) {
log.trace("Not using EagerDeleteTargetFile, target exists");
if (endpoint.getFileExist() == GenericFileExist.Ignore) {
// ignore but indicate that the file was written
log.trace(
"An existing file already exists: {}. Ignore and do not override it.", target);
return;
} else if (endpoint.getFileExist() == GenericFileExist.Fail) {
throw new GenericFileOperationFailedException(
"File already exist: " + target + ". Cannot write new file.");
} else if (endpoint.getFileExist() == GenericFileExist.Override) {
// we override the target so we do this by deleting it so the temp file can be renamed
// later
// with success as the existing target file have been deleted
log.trace("Deleting existing file: {}", target);
if (!operations.deleteFile(target)) {
throw new GenericFileOperationFailedException("Cannot delete file: " + target);
}
}
}
}
// now we are ready to rename the temp file to the target file
log.trace("Renaming file: [{}] to: [{}]", tempTarget, target);
boolean renamed = operations.renameFile(tempTarget, target);
if (!renamed) {
throw new GenericFileOperationFailedException(
"Cannot rename file from: " + tempTarget + " to: " + target);
}
}
// any done file to write?
if (endpoint.getDoneFileName() != null) {
String doneFileName = endpoint.createDoneFileName(target);
ObjectHelper.notEmpty(doneFileName, "doneFileName", endpoint);
// create empty exchange with empty body to write as the done file
Exchange empty = new DefaultExchange(exchange);
empty.getIn().setBody("");
log.trace("Writing done file: [{}]", doneFileName);
// delete any existing done file
if (operations.existsFile(doneFileName)) {
if (!operations.deleteFile(doneFileName)) {
throw new GenericFileOperationFailedException(
"Cannot delete existing done file: " + doneFileName);
}
}
writeFile(empty, doneFileName);
}
// let's store the name we really used in the header, so end-users
// can retrieve it
exchange.getIn().setHeader(Exchange.FILE_NAME_PRODUCED, target);
} catch (Exception e) {
handleFailedWrite(exchange, e);
}
postWriteCheck();
}
