| /* |
| * 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.geode.cache.client.internal; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.internal.cache.GemFireCacheImpl; |
| import org.apache.geode.internal.cache.InternalCache; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| import org.apache.geode.pdx.internal.TypeRegistry; |
| |
| /** |
| * A listener which will wipe out the PDX registry on the client side if the entire server |
| * distributed system was lost and came back on line. <br> |
| * <br> |
| * TODO - There is a window in which all of the servers could crash and come back up and we would |
| * connect to a new server before realizing that all the servers crashed. To fix this, we would need |
| * to get some kind of birthdate of the server ds we connect and use that to decide if we need to |
| * recover the PDX registry. |
| * |
| * We can also lose connectivity with the servers, even if the servers are still running. Maybe for |
| * the PDX registry we need some way of telling if the PDX registry was lost at the server side in |
| * the interval. |
| * |
| * |
| * |
| */ |
| public class PdxRegistryRecoveryListener extends EndpointManager.EndpointListenerAdapter { |
| private static final Logger logger = LogService.getLogger(); |
| |
| private final AtomicInteger endpointCount = new AtomicInteger(); |
| private final InternalPool pool; |
| |
| public PdxRegistryRecoveryListener(InternalPool pool) { |
| this.pool = pool; |
| } |
| |
| @Override |
| public void endpointCrashed(Endpoint endpoint) { |
| int count = endpointCount.decrementAndGet(); |
| if (logger.isDebugEnabled()) { |
| logger.debug("PdxRegistryRecoveryListener - EndpointCrashed. Now have {} endpoints", count); |
| } |
| } |
| |
| @Override |
| public void endpointNoLongerInUse(Endpoint endpoint) { |
| int count = endpointCount.decrementAndGet(); |
| if (logger.isDebugEnabled()) { |
| logger.debug("PdxRegistryRecoveryListener - EndpointNoLongerInUse. Now have {} endpoints", |
| count); |
| } |
| } |
| |
| @Override |
| public void endpointNowInUse(Endpoint endpoint) { |
| int count = endpointCount.incrementAndGet(); |
| if (logger.isDebugEnabled()) { |
| logger.debug("PdxRegistryRecoveryListener - EndpointNowInUse. Now have {} endpoints", count); |
| } |
| if (count == 1) { |
| InternalCache cache = GemFireCacheImpl.getInstance(); |
| if (cache == null) { |
| return; |
| } |
| TypeRegistry registry = cache.getPdxRegistry(); |
| |
| if (registry == null) { |
| return; |
| } |
| registry.clear(); |
| } |
| } |
| } |