| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.atlas.web.filters; |
| |
| import org.apache.atlas.repository.graph.AtlasGraphProvider; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.stereotype.Component; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import java.io.IOException; |
| |
| /** |
| * Filter that rolls back the stale transaction associated with |
| * the thread running this request so that the request will |
| * see all of the committed changes. |
| * |
| */ |
| @Component |
| public class StaleTransactionCleanupFilter implements Filter { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(StaleTransactionCleanupFilter.class); |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| //nothing to do |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) |
| throws IOException, ServletException { |
| LOG.info("Cleaning stale transactions"); |
| AtlasGraphProvider.getGraphInstance().rollback(); |
| filterChain.doFilter(request, response); |
| } |
| |
| @Override |
| public void destroy() { |
| // do nothing |
| } |
| } |