Package org.linuxforhealth.fhir.bucket.scanner

Class LocalFileScanner

  • All Implemented Interfaces:
    IResourceScanner
    public class LocalFileScanner
extends java.lang.Object
implements IResourceScanner
    Active object to periodically scan a local directory looking for new objects to load

    • Constructor Summary

      Constructors 
      Constructor Description
      LocalFileScanner​(java.util.Collection<java.lang.String> dirs, DataAccess dataAccess, java.util.Set<FileType> fileTypes, java.lang.String pathPrefix, int scanIntervalMs)
      Public constructor

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected static FileType fileTyper​(java.lang.String itemName)
      Determine the type of the file based on the suffix
      protected void handle​(CosItem item)
      Process the item returned by the scan
      protected void heartbeat()
      Update the heartbeat on a (reasonably) regular basis to demonstrate this loader instance is still alive
      void init()
      Start the scanner
      void mainLoop()
      The main loop running inside this active object's thread
      protected void scan()
      Perform a scan for each of the configured directories
      protected void scan​(java.lang.String dir)
      Scan the given directory
      void signalStop()
      Tells the scanner to stop
      void waitForStop()
      Tell the main loop thread to stop if it hasn't already and wait a reasonable time for the main thread loop to terminate

      • Methods inherited from class java.lang.Object

        clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

    • Constructor Detail

      • LocalFileScanner

        public LocalFileScanner​(java.util.Collection<java.lang.String> dirs,
                        DataAccess dataAccess,
                        java.util.Set<FileType> fileTypes,
                        java.lang.String pathPrefix,
                        int scanIntervalMs)
        Public constructor
        Parameters:
        dirs - the directories to scan
        dataAccess - the data access layer for persisting items discovered during the scan
        fileTypes - set of FileType values accepted for processing
        prefix - only scan items with this prefix if set
        scanIntervalMs - the number of milliseconds between scans. -1 for automatic

    • Method Detail

      • waitForStop

        public void waitForStop()
        Description copied from interface: IResourceScanner
        Tell the main loop thread to stop if it hasn't already and wait a reasonable time for the main thread loop to terminate
        Specified by:
        waitForStop in interface IResourceScanner

      • mainLoop

        public void mainLoop()
        The main loop running inside this active object's thread

      • scan

        protected void scan()
        Perform a scan for each of the configured directories

      • scan

        protected void scan​(java.lang.String dir)
        Scan the given directory
        Parameters:
        dir -

      • fileTyper

        protected static FileType fileTyper​(java.lang.String itemName)
        Determine the type of the file based on the suffix
        Parameters:
        itemName -
        Returns:

      • handle

        protected void handle​(CosItem item)
        Process the item returned by the scan
        Parameters:
        item -

      • heartbeat

        protected void heartbeat()
        Update the heartbeat on a (reasonably) regular basis to demonstrate this loader instance is still alive