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## org.mule.transport.file
Class FileMessageReceiver

    java.lang.Object
      org.mule.transport.AbstractTransportMessageHandler
          org.mule.transport.AbstractMessageReceiver
              org.mule.transport.AbstractPollingMessageReceiver
                  org.mule.transport.file.FileMessageReceiver

All Implemented Interfaces:
  Disposable, Initialisable, Lifecycle, LifecycleStateEnabled, Startable, Stoppable, MessageSource, Connectable, MessageReceiver

    public class FileMessageReceiver

extends AbstractPollingMessageReceiver

`FileMessageReceiver` is a polling listener that reads files from a directory.

Field Summary
`static String` | `COMPARATOR_CLASS_NAME_PROPERTY`
`static String` | `COMPARATOR_REVERSE_ORDER_PROPERTY`

Fields inherited from class org.mule.transport.AbstractPollingMessageReceiver
`DEFAULT_POLL_FREQUENCY, DEFAULT_POLL_TIMEUNIT, DEFAULT_STARTUP_DELAY, schedules`

Fields inherited from class org.mule.transport.AbstractMessageReceiver
`defaultInboundTransformers, defaultResponseTransformers, flowConstruct, listener, receiverKey`

Fields inherited from class org.mule.transport.AbstractTransportMessageHandler
`connected, connecting, connector, endpoint, lifecycleManager, logger, muleMessageFactory, retryTemplate, startOnConnect`

Fields inherited from interface org.mule.api.lifecycle.Initialisable
`PHASE_NAME`

Fields inherited from interface org.mule.api.lifecycle.Startable
`PHASE_NAME`

Fields inherited from interface org.mule.api.lifecycle.Stoppable
`PHASE_NAME`

Fields inherited from interface org.mule.api.lifecycle.Disposable
`PHASE_NAME`

Constructor Summary
`FileMessageReceiver(Connector connector, FlowConstruct flowConstruct, InboundEndpoint endpoint, String readDir, String moveDir, String moveToPattern, long frequency)`

Method Summary
`protected boolean` | `attemptFileLock(File sourceFile)` Try to acquire a lock on a file and release it immediately.
`protected void` | `basicListFiles(File currentDirectory, List<File> discoveredFiles)`
`protected void` | `doConnect()`
`protected void` | `doDisconnect()`
`protected void` | `doDispose()`
`protected Comparator<File>` | `getComparator()`
`void` | `poll()`
`void` | `processFile(File sourceFile)`
`protected void` | `rollbackFileMove(File sourceFile, String destinationFilePath)` Exception tolerant roll back method

Methods inherited from class org.mule.transport.AbstractPollingMessageReceiver
`createWork, disableNativeScheduling, doStart, doStop, getFrequency, getTimeUnit, schedule, setFrequency, setTimeUnit, unschedule`

Methods inherited from class org.mule.transport.AbstractMessageReceiver
`applyInboundTransformers, applyResponseTransformers, createLifecycleManager, createMuleEvent, getConnectEventId, getConnectionDescription, getEndpoint, getEndpointURI, getFlowConstruct, getReceiverKey, getWorkManager, handleUnacceptedFilter, initialise, routeMessage, routeMessage, routeMessage, routeMessage, setEndpoint, setListener, setReceiverKey, toString`

Methods inherited from class org.mule.transport.AbstractTransportMessageHandler
`activate, callDoStartWhenItIsConnected, connect, connectAndThenStart, createMuleMessage, createMuleMessage, createMuleMessage, createMuleMessageFactory, createNullMuleMessage, disconnect, dispose, disposeAndLogException, doInitialise, getConnectEventId, getConnector, getLifecycleState, initializeMessageFactory, initializeRetryPolicy, isConnected, isConnecting, isDoStartMustFollowDoConnect, isDoThreading, isStarted, passivate, setEndpoint, start, stop, validate, validateConnection`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.mule.api.transport.MessageReceiver
`createMuleMessage, createMuleMessage`

Methods inherited from interface org.mule.api.transport.Connectable
`connect, disconnect, isConnected, validateConnection`

Methods inherited from interface org.mule.api.lifecycle.Startable
`start`

Methods inherited from interface org.mule.api.lifecycle.Stoppable
`stop`

Methods inherited from interface org.mule.api.lifecycle.Disposable
`dispose`

Field Detail

### COMPARATOR_CLASS_NAME_PROPERTY

    public static final String COMPARATOR_CLASS_NAME_PROPERTY

See Also:
  Constant Field Values

### COMPARATOR_REVERSE_ORDER_PROPERTY

    public static final String COMPARATOR_REVERSE_ORDER_PROPERTY

See Also:
  Constant Field Values

Constructor Detail

### FileMessageReceiver

    public FileMessageReceiver(Connector connector,
                               FlowConstruct flowConstruct,
                               InboundEndpoint endpoint,
                               String readDir,
                               String moveDir,
                               String moveToPattern,
                               long frequency)
                        throws CreateException

Throws:
  `CreateException`

Method Detail

### doConnect

    protected void doConnect()
                      throws Exception

  Overrides:
    `doConnect` in class `AbstractTransportMessageHandler`
  Throws:
    `Exception`

### doDisconnect

    protected void doDisconnect()
                         throws Exception

  Overrides:
    `doDisconnect` in class `AbstractTransportMessageHandler`
  Throws:
    `Exception`

### doDispose

    protected void doDispose()

  Overrides:
    `doDispose` in class `AbstractMessageReceiver`

### poll

    public void poll()

  Specified by:
    `poll` in class `AbstractPollingMessageReceiver`

### processFile

    public void processFile(File sourceFile)
                     throws MuleException

  Throws:
    `MuleException`

### attemptFileLock

    protected boolean attemptFileLock(File sourceFile)

  Try to acquire a lock on a file and release it immediately. Usually used as a quick check to see if another process is still holding onto the file, e.g. a large file (more than 100MB) is still being written to.

  Parameters:
    `sourceFile` - file to check
  Returns:
    `true` if the file can be locked

### basicListFiles

    protected void basicListFiles(File currentDirectory,
                                  List<File> discoveredFiles)

### rollbackFileMove

    protected void rollbackFileMove(File sourceFile,
                                    String destinationFilePath)
                             throws IOException

  Exception tolerant roll back method

  Throws:
    `Throwable`
    `IOException`

### getComparator

    protected Comparator<File> getComparator()
                                      throws Exception

  Throws:
    `Exception`

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