Package org.apache.geode.connectors.jdbc

Class JdbcLoader<K,V>

java.lang.Object
org.apache.geode.connectors.jdbc.internal.AbstractJdbcCallback
org.apache.geode.connectors.jdbc.JdbcLoader<K,V>
All Implemented Interfaces:
CacheCallback, CacheLoader<K,V>, Declarable
@Experimental public class JdbcLoader<K,V> extends org.apache.geode.connectors.jdbc.internal.AbstractJdbcCallback implements CacheLoader<K,V>
This class provides loading from a data source using JDBC.
Since:
Geode 1.4

  • Field Summary

    Fields inherited from class org.apache.geode.connectors.jdbc.internal.AbstractJdbcCallback

    cache

  • Constructor Summary

    Constructors
    Constructor
    Description
    JdbcLoader()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    V
    load(LoaderHelper<K,V> helper)
    Loads a value.

    Methods inherited from class org.apache.geode.connectors.jdbc.internal.AbstractJdbcCallback

    checkInitialized, eventCanBeIgnored, getSqlHandler

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.apache.geode.cache.CacheCallback

    close

    Methods inherited from interface org.apache.geode.cache.Declarable

    init, initialize

  • Constructor Details

    • JdbcLoader

      public JdbcLoader()

  • Method Details

    • load

      public V load(LoaderHelper<K,V> helper) throws CacheLoaderException
      Description copied from interface: CacheLoader
      Loads a value. Application writers should implement this method to customize the loading of a value. This method is called by the caching service when the requested value is not in the cache. Any exception (including an unchecked exception) thrown by this method is propagated back to and thrown by the invocation of Region.get(Object, Object) that triggered this load.

      Specified by:
      load in interface CacheLoader<K,V>
      Parameters:
      helper - a LoaderHelper object that is passed in from cache service and provides access to the key, region, argument, and netSearch.
      Returns:
      this method always returns a PdxInstance. It does not matter what the V generic parameter is set to.
      Throws:
      CacheLoaderException - if an error occurs. This exception or any other exception thrown by this method will be propagated back to the application from the get method.
      See Also: