    001    //  Copyright 2008, 2009 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.ioc;
    016
    017    /**
    018     * Used to track some set of operations in such a way that a failure (a thrown RuntimeException) will be logged along
    019     * with a trace of the stack of operations.
    020     */
    021    public interface OperationTracker
    022    {
    023        /**
    024         * Executes the operation.
    025         *
    026         * @param description used if there is an exception
    027         * @param operation   to execute
    028         */
    029        void run(String description, Runnable operation);
    030
    031        /**
    032         * Executes the operation, returning its value.
    033         *
    034         * @param description used if there is an exception
    035         * @param operation   to invoke
    036         * @return result of operation
    037         */
    038        <T> T invoke(String description, Invokable<T> operation);
    039    }