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This companion provides additional appenders, filters and other capabilities for log4j 1.2. Several of these were backported from the abandoned log4j 1.3 development effort.

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/*
 * Copyright 1999,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.log4j.rolling.helper;

import java.io.IOException;


/**
 * The Action interface should be implemented by any class that performs
 * file system actions for RollingFileAppenders after the close of
 * the active log file.
 *
 * @author Curt Arnold
 */
public interface Action extends Runnable {
  /**
   * Perform an action.
   * @return  true if action was successful.  A return value of false will cause
   * the rollover to be aborted if possible.
   * @throws IOException if IO error, a thrown exception will cause the rollover
   * to be aborted if possible.
   */
  boolean execute() throws IOException;

    /**
     * Cancels the action if not already initialized or waits till completion.
     */
  void close();

  /**
   * Determines if action has been completed.
    * @return true if action is complete.
   */
  boolean isComplete();
}