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