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    }