001// Copyright 2006, 2007, 2008 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
015package org.apache.tapestry5.ioc.internal.services;
016
017import java.util.Set;
018
019import org.apache.tapestry5.commons.util.CollectionFactory;
020import org.apache.tapestry5.ioc.ScopeConstants;
021import org.apache.tapestry5.ioc.annotations.PreventServiceDecoration;
022import org.apache.tapestry5.ioc.annotations.Scope;
023import org.apache.tapestry5.ioc.services.ExceptionTracker;
024
025@Scope(ScopeConstants.PERTHREAD)
026@PreventServiceDecoration
027public class ExceptionTrackerImpl implements ExceptionTracker
028{
029    private final Set<Throwable> exceptions = CollectionFactory.newSet();
030
031    @Override
032    public boolean exceptionLogged(Throwable exception)
033    {
034        boolean result = exceptions.contains(exception);
035
036        exceptions.add(exception);
037
038        return result;
039    }
040}