1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.testing; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.common.annotations.Beta; 22 import com.google.common.annotations.GwtCompatible; 23 24 import java.util.ArrayList; 25 import java.util.LinkedList; 26 import java.util.List; 27 import java.util.logging.Level; 28 import java.util.logging.Logger; 29 30 /** 31 * A {@code TearDownStack} contains a stack of {@link TearDown} instances. 32 * 33 * @author Kevin Bourrillion 34 * @since 10.0 35 */ 36 @Beta 37 @GwtCompatible 38 public class TearDownStack implements TearDownAccepter { 39 private static final Logger logger = Logger.getLogger(TearDownStack.class.getName()); 40 41 final LinkedList<TearDown> stack = new LinkedList<TearDown>(); 42 43 private final boolean suppressThrows; 44 45 public TearDownStack() { 46 this.suppressThrows = false; 47 } 48 49 public TearDownStack(boolean suppressThrows) { 50 this.suppressThrows = suppressThrows; 51 } 52 53 @Override 54 public final void addTearDown(TearDown tearDown) { 55 stack.addFirst(checkNotNull(tearDown)); 56 } 57 58 /** 59 * Causes teardown to execute. 60 */ 61 public final void runTearDown() { 62 List<Throwable> exceptions = new ArrayList<Throwable>(); 63 for (TearDown tearDown : stack) { 64 try { 65 tearDown.tearDown(); 66 } catch (Throwable t) { 67 if (suppressThrows) { 68 logger.log(Level.INFO, "exception thrown during tearDown", t); 69 } else { 70 exceptions.add(t); 71 } 72 } 73 } 74 stack.clear(); 75 if ((!suppressThrows) && (exceptions.size() > 0)) { 76 throw ClusterException.create(exceptions); 77 } 78 } 79 } 80
