Android Open Source - libgdx-chat-example Action Handler

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License

The source code is released under:

Apache License

Java Source Code

package org.stofkat.chat.server;
//  w w w.j av  a  2 s.c o m
import javax.servlet.http.HttpSession;

import org.apache.http.protocol.ExecutionContext;
import org.stofkat.chat.common.actions.Action;
import org.stofkat.chat.common.exceptions.DispatchException;
import org.stofkat.chat.common.results.Result;

/**
 * Instances of this interface will handle specific types of {@link Action}
 * classes.
 * 
 * @author David Peterson
 */
public interface ActionHandler<A extends Action<R>, R extends Result> {

  /**
   * @return The type of {@link Action} supported by this handler.
   */
  Class<A> getActionType();

  /**
   * Handles the specified action.
   * 
   * @param <T>
   *            The Result type.
   * @param action
   *            The action.
   * @return The {@link Result}.
   * @throws DispatchException
   *             if there is a problem performing the specified action.
   */
  R execute(A action, ExecutionContext context, HttpSession session) throws DispatchException;

  /**
   * Attempts to roll back the specified action.
   * 
   * @param action
   *            The action.
   * @param result
   *            The result of the action.
   * @param context
   *            The execution context.
   * @throws DispatchException
   */
  void rollback(A action, R result, ExecutionContext context)
      throws DispatchException;
}

Java Source Code List

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