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 com.google.common.annotations.Beta; 20 import com.google.common.annotations.GwtCompatible; 21 22 import java.util.ArrayList; 23 import java.util.LinkedList; 24 import java.util.List; 25 import java.util.logging.Level; 26 import java.util.logging.Logger; 27 28 /** 29 * A {@code TearDownStack} contains a stack of {@link TearDown} instances. 30 * 31 * @author Kevin Bourrillion 32 * @since 10.0 33 */ 34 @Beta 35 @GwtCompatible 36 public class TearDownStack implements TearDownAccepter { 37 public static final Logger logger 38 = Logger.getLogger(TearDownStack.class.getName()); 39 40 final LinkedList<TearDown> stack = new LinkedList<TearDown>(); 41 42 private final boolean suppressThrows; 43 TearDownStack()44 public TearDownStack() { 45 this.suppressThrows = false; 46 } 47 TearDownStack(boolean suppressThrows)48 public TearDownStack(boolean suppressThrows) { 49 this.suppressThrows = suppressThrows; 50 } 51 52 @Override addTearDown(TearDown tearDown)53 public final void addTearDown(TearDown tearDown) { 54 stack.addFirst(tearDown); 55 } 56 57 /** 58 * Causes teardown to execute. 59 */ runTearDown()60 public final void runTearDown() { 61 List<Throwable> exceptions = new ArrayList<Throwable>(); 62 for (TearDown tearDown : stack) { 63 try { 64 tearDown.tearDown(); 65 } catch (Throwable t) { 66 if (suppressThrows) { 67 TearDownStack.logger.log(Level.INFO, 68 "exception thrown during tearDown: " + t.getMessage(), 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