Java example source code file (TearDownStack.java)

This example Java source code file (TearDownStack.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, beta, gwtcompatible, linkedlist, list, log, logger, logging, override, teardownaccepter, teardownstack, throwable, util

The TearDownStack.java Java example source code

/*
 * Copyright (C) 2008 The Guava Authors
 *
 * 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 com.google.common.testing;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.Beta;
import com.google.common.annotations.GwtCompatible;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A {@code TearDownStack} contains a stack of {@link TearDown} instances.
 *
 * @author Kevin Bourrillion
 * @since 10.0
 */
@Beta
@GwtCompatible
public class TearDownStack implements TearDownAccepter {
  private static final Logger logger = Logger.getLogger(TearDownStack.class.getName());

  final LinkedList<TearDown> stack = new LinkedList();

  private final boolean suppressThrows;

  public TearDownStack() {
    this.suppressThrows = false;
  }

  public TearDownStack(boolean suppressThrows) {
    this.suppressThrows = suppressThrows;
  }

  @Override
  public final void addTearDown(TearDown tearDown) {
    stack.addFirst(checkNotNull(tearDown));
  }

  /**
   * Causes teardown to execute.
   */
  public final void runTearDown() {
    List<Throwable> exceptions = new ArrayList();
    for (TearDown tearDown : stack) {
      try {
        tearDown.tearDown();
      } catch (Throwable t) {
        if (suppressThrows) {
          logger.log(Level.INFO, "exception thrown during tearDown", t);
        } else {
          exceptions.add(t);
        }
      }
    }
    stack.clear();
    if ((!suppressThrows) && (exceptions.size() > 0)) {
      throw ClusterException.create(exceptions);
    }
  }
}