This interface has an accept method that returns a boolean. Return true to include the file, and false to skip the file. From Camel 2. This allows you to filter unwanted directories, to avoid traversing down unwanted directories. For example to skip any directories which starts with "skip" in the name, can be implemented as follows:. Camel Apache. File Component The File component provides access to file systems, allowing files to be processed by any other Camel Components or messages from other components to be saved to disk.
URI format file:directoryName[? Only directories Camel supports only endpoints configured with a starting directory. So the directoryName must be a directory. If you want to consume a single file only, you can use the fileName option, e.
Again use the fileName option to specify the dynamic part of the filename. And the implementation can be different depending on OS platform as well. This could lead to that Camel thinks the file is not locked by another process and start consuming it. Therefore you have to do you own investigation what suites your environment.
To help with this Camel provides different readLock options and doneFileOption option that you can use. See also the section Consuming files from folders where others drop files directly. Name Default Value Description autoCreate true Automatically create missing directories in the file's pathname.
For the file consumer, that means creating the starting directory. For the file producer, it means the directory the files should be written to. For consumers, it's used as a filename filter. For producers, it's used to evaluate the filename to write. If an expression is set, it take precedence over the CamelFileName header.
Note: The header itself can also be an Expression. The expression options support both String and Expression types. If the expression is a String type, it is always evaluated using the File Language.
If the expression is an Expression type, the specified Expression type is used - this allows you, for instance, to use OGNL expressions. This allows you to consume recursively into sub-directories, but when you eg write the files to another directory they will be written in a single directory. Setting this to true on the producer enforces that any file name recived in CamelFileName header will be stripped for any leading paths. This option is not available for the FTP component.
In Camel 2. This option allows you to configure the logging level for that. This option is good for readonly data, or for ETL type requirements.
For example to move in-progress files into the order directory set this value to order. To move files into a. For example, to move files into a.
Multiple inclusions may be specified in comma-delimited format. See below for more details about ant path filters. If both antInclude and antExclude are used, antExclude takes precedence over antInclude. Multiple exclusions may be specified in comma-delimited format. Will by default use a memory based LRUCache that holds entries. IdempotentRepository which by default use MemoryMessageIdRepository if none is specified and idempotent is true.
The in-progress repository is used to account the current in progress files being consumed. By default a memory based repository is used. GenericFileFilter class. Will skip files if filter returns false in its accept method. More details in section below.
Supports nested sorts, so you can have a sort by file name and as a 2nd group sort by modified date. See sorting section below for details. Camel will wait until the file lock is granted.
This option provides the build in strategies: markerFile Camel creates a marker file and then holds a lock on it. Will at least use 1 sec. This option is only avail for the FTP component from Camel 2. This option is not avail for the FTP component. If the read-lock could not be granted and the timeout triggered, then Camel will skip the file.
At next poll Camel, will try the file again, and this time maybe the read-lock could be granted. Use a value of 0 or lower to indicate forever. Currently fileLock , changed and rename support the timeout. This interval is used for sleeping between attempts to acquire the read lock.
For example when using the changed read lock, you can set a higher interval period to cater for slow writes.
The default of 1 sec. This option configures what file name to use. Either you can specify a fixed name. Or you can use dynamic placeholders. The done file is always expected in the same folder as the original file. See using done file and writing done file sections for examples. By default no maximum is set. Can be used to set a limit of e.
Set a value of 0 or negative to disabled it. See more details at Batch Consumer. This option is supported by FTP consumer from Camel 2. GenericFileProcessStrategy allowing you to implement your own readLock option or similar. Can also be used when special conditions must be met before a file can be consumed, such as a special ready file exists.
If this option is set then the readLock option does not apply. Mind that the autoCreate option is default enabled, which means the starting directory is normally auto created if it doesn't exist. You can disable autoCreate and enable this to ensure the starting directory must exist. Will thrown an exception if the directory doesn't exist. PollingConsumerPollStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.
In other words the error occurred while the polling was gathering information, for instance access to a file network failed so Camel cannot access it to scan for files. The default implementation will log the caused exception at WARN level and ignore it.
The following values can be specified: Override , Append , Fail and Ignore. Override , which is the default, replaces the existing file. Append adds content to the existing file. Fail throws a GenericFileOperationException , indicating that there is already an existing file. Ignore silently ignores the problem and does not override the existing file, but assumes everything is okay.
Can be used to identify files being written and also avoid consumers not using exclusive read locks reading in progress files. Is often used by FTP when uploading big files. Will use the Exchange. Replace the [ Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Collectives on Stack Overflow. Learn more. Asked 8 years, 1 month ago. Active 8 years, 1 month ago. Viewed 6k times. I have a question related to camel context programming. Does anyone know how to write it in spring xml in camel context? Thanks in advance! Lisa Lisa 53 2 2 silver badges 4 4 bronze badges. Add a comment. Option only for the FileConsumer. If this option is true and there was no files to process we simulate processing a single empty file, so an exchange is fired.
Note: In this situation the File attribute in FileExchange is null. This option is good for read only data, or for ETL type requirements. For example, to rename processed files from foo to foo. Uses File mkdirs bufferSize kb Write buffer sized in bytes.
If this flag is enabled, then producers will ignore the org. The parameter is a String[] excludedNamePostfixes null Is used to exclude files if filename is ending with any of the given prefixes. The parameter is a String[] excludedNamePrefix null Camel 1. This allows you very easily to set dynamic pattern style filenames.
If an expression is set it take precedes over the org. Note: The header can itself also be an expression. The expression options supports both String and Expression types. If the expression is a String type, then it is always evaluated using the File Language. If the expression is an Expression type, then the specified Expression type is used - this allows you, for instance, to use OGNL expressions. For example, to rename in-progress files from foo to foo. For example to move in-progress files into the order directory and use.
Header Description org. If this is not present and no expression either, then a generated message ID is used as the filename instead. This header is set by Camel and its purpose is providing end-users the name of the file that was written. Privacy Policy - edit page. All other marks mentioned may be trademarks or registered trademarks of their respective owners. Graphic Design By Hiram. Using Camel 2. Camel 1. If a directory, will look for changes in files in all the sub directories.
Will only fire a an exchange for a file that matches the regex pattern. If true , will lock the file for the duration of the processing. If true , the file will be deleted when it is processed the default is to move it, see below.
If true , the file is not moved or deleted in any way see below. The prefix string prepended to the filename when moving it. The postfix string appended to the filename when moving it. When writing, do we append to the end of the file, or replace it?
If set to true , Camel will create any missing directories in the file's pathname. Uses File mkdirs.
0コメント