Package org.apache.manifoldcf.crawler.connectors.webcrawler

Class DNSManager.HostExecutor

  • All Implemented Interfaces:
    org.apache.manifoldcf.core.interfaces.ICacheExecutor
    Enclosing class:
    DNSManager
    protected static class DNSManager.HostExecutor
extends org.apache.manifoldcf.core.cachemanager.ExecutorBase
    This is the executor object for locating robots host objects. This object furnishes the operations the cache manager needs to rebuild objects that it needs that are not in the cache at the moment.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object[] create​(org.apache.manifoldcf.core.interfaces.ICacheDescription[] objectDescriptions)
      Create a set of new objects to operate on and cache.
      void execute()
      Perform the desired operation.
      void exists​(org.apache.manifoldcf.core.interfaces.ICacheDescription objectDescription, java.lang.Object cachedObject)
      Notify the implementing class of the existence of a cached version of the object.
      DNSManager.DNSInfo getResults()
      Get the result.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • HostExecutor

        public HostExecutor​(DNSManager manager,
                    DNSManager.HostDescription objectDescription)
        Constructor.
        Parameters:
        manager - is the RobotsManager class instance.
        objectDescription - is the desired object description.

    • Method Detail

      • getResults

        public DNSManager.DNSInfo getResults()
        Get the result.
        Returns:
        the looked-up or read cached instance.

      • create

        public java.lang.Object[] create​(org.apache.manifoldcf.core.interfaces.ICacheDescription[] objectDescriptions)
                          throws org.apache.manifoldcf.core.interfaces.ManifoldCFException
        Create a set of new objects to operate on and cache. This method is called only if the specified object(s) are NOT available in the cache. The specified objects should be created and returned; if they are not created, it means that the execution cannot proceed, and the execute() method will not be called.
        Parameters:
        objectDescriptions - is the set of unique identifier of the object.
        Returns:
        the newly created objects to cache, or null, if any object cannot be created. The order of the returned objects must correspond to the order of the object descriptinos.
        Throws:
        org.apache.manifoldcf.core.interfaces.ManifoldCFException

      • exists

        public void exists​(org.apache.manifoldcf.core.interfaces.ICacheDescription objectDescription,
                   java.lang.Object cachedObject)
            throws org.apache.manifoldcf.core.interfaces.ManifoldCFException
        Notify the implementing class of the existence of a cached version of the object. The object is passed to this method so that the execute() method below will have it available to operate on. This method is also called for all objects that are freshly created as well.
        Parameters:
        objectDescription - is the unique identifier of the object.
        cachedObject - is the cached object.
        Throws:
        org.apache.manifoldcf.core.interfaces.ManifoldCFException

      • execute

        public void execute()
             throws org.apache.manifoldcf.core.interfaces.ManifoldCFException
        Perform the desired operation. This method is called after either createGetObject() or exists() is called for every requested object.
        Throws:
        org.apache.manifoldcf.core.interfaces.ManifoldCFException