| /* |
| * 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.modules.session.internal.common; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.servlet.http.HttpSession; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.geode.cache.DataPolicy; |
| import org.apache.geode.cache.GemFireCache; |
| import org.apache.geode.cache.InterestResultPolicy; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.cache.RegionShortcut; |
| import org.apache.geode.cache.client.ClientCache; |
| import org.apache.geode.cache.client.ClientRegionFactory; |
| import org.apache.geode.cache.client.ClientRegionShortcut; |
| import org.apache.geode.cache.execute.Execution; |
| import org.apache.geode.cache.execute.FunctionService; |
| import org.apache.geode.cache.execute.ResultCollector; |
| import org.apache.geode.modules.util.BootstrappingFunction; |
| import org.apache.geode.modules.util.CreateRegionFunction; |
| import org.apache.geode.modules.util.RegionConfiguration; |
| import org.apache.geode.modules.util.RegionStatus; |
| import org.apache.geode.modules.util.SessionCustomExpiry; |
| |
| /** |
| * Class which defines a client/server cache. |
| */ |
| public class ClientServerSessionCache extends AbstractSessionCache { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(PeerToPeerSessionCache.class.getName()); |
| |
| private ClientCache cache; |
| |
| protected static final String DEFAULT_REGION_ATTRIBUTES_ID = |
| RegionShortcut.PARTITION_REDUNDANT.toString(); |
| |
| protected static final Boolean DEFAULT_ENABLE_LOCAL_CACHE = true; |
| |
| /** |
| * Constructor |
| * |
| */ |
| public ClientServerSessionCache(ClientCache cache, Map<CacheProperty, Object> properties) { |
| super(); |
| this.cache = cache; |
| |
| /** |
| * Set some default properties for this cache if they haven't already been set |
| */ |
| this.properties.put(CacheProperty.REGION_ATTRIBUTES_ID, DEFAULT_REGION_ATTRIBUTES_ID); |
| this.properties.put(CacheProperty.ENABLE_LOCAL_CACHE, DEFAULT_ENABLE_LOCAL_CACHE); |
| this.properties.putAll(properties); |
| } |
| |
| @Override |
| public void initialize() { |
| // Bootstrap the servers |
| bootstrapServers(); |
| |
| // Create or retrieve the region |
| createOrRetrieveRegion(); |
| |
| // Set the session region directly as the operating region since there is no difference |
| // between the local cache region and the session region. |
| operatingRegion = sessionRegion; |
| |
| // Create or retrieve the statistics |
| createStatistics(); |
| } |
| |
| @Override |
| public GemFireCache getCache() { |
| return cache; |
| } |
| |
| @Override |
| public boolean isClientServer() { |
| return true; |
| } |
| |
| |
| //////////////////////////////////////////////////////////////////////// |
| // Private methods |
| |
| private void bootstrapServers() { |
| Execution execution = FunctionService.onServers(this.cache); |
| ResultCollector collector = execution.execute(new BootstrappingFunction()); |
| // Get the result. Nothing is being done with it. |
| try { |
| collector.getResult(); |
| } catch (Exception e) { |
| // If an exception occurs in the function, log it. |
| LOG.warn("Caught unexpected exception:", e); |
| } |
| } |
| |
| private void createOrRetrieveRegion() { |
| // Retrieve the local session region |
| this.sessionRegion = this.cache.getRegion((String) properties.get(CacheProperty.REGION_NAME)); |
| |
| // If necessary, create the regions on the server and client |
| if (this.sessionRegion == null) { |
| // Create the PR on the servers |
| createSessionRegionOnServers(); |
| |
| // Create the region on the client |
| this.sessionRegion = createLocalSessionRegion(); |
| LOG.debug("Created session region: " + this.sessionRegion); |
| } else { |
| LOG.debug("Retrieved session region: " + this.sessionRegion); |
| |
| // Register interest in case users provide their own client cache region |
| if (sessionRegion.getAttributes().getDataPolicy() != DataPolicy.EMPTY) { |
| sessionRegion.registerInterestForAllKeys(InterestResultPolicy.KEYS); |
| } |
| } |
| } |
| |
| private void createSessionRegionOnServers() { |
| // Create the RegionConfiguration |
| RegionConfiguration configuration = createRegionConfiguration(); |
| |
| // Send it to the server tier |
| Execution execution = FunctionService.onServer(this.cache).setArguments(configuration); |
| ResultCollector collector = execution.execute(CreateRegionFunction.ID); |
| |
| // Verify the region was successfully created on the servers |
| List<RegionStatus> results = (List<RegionStatus>) collector.getResult(); |
| for (RegionStatus status : results) { |
| if (status == RegionStatus.INVALID) { |
| StringBuilder builder = new StringBuilder(); |
| builder.append( |
| "An exception occurred on the server while attempting to create or validate region named "); |
| builder.append(properties.get(CacheProperty.REGION_NAME)); |
| builder.append(". See the server log for additional details."); |
| throw new IllegalStateException(builder.toString()); |
| } |
| } |
| } |
| |
| private Region<String, HttpSession> createLocalSessionRegion() { |
| ClientRegionFactory<String, HttpSession> factory = null; |
| boolean enableLocalCache = (Boolean) properties.get(CacheProperty.ENABLE_LOCAL_CACHE); |
| |
| String regionName = (String) properties.get(CacheProperty.REGION_NAME); |
| if (enableLocalCache) { |
| // Create the region factory with caching and heap LRU enabled |
| factory = this.cache |
| .<String, HttpSession>createClientRegionFactory( |
| ClientRegionShortcut.CACHING_PROXY_HEAP_LRU) |
| .setCustomEntryIdleTimeout(new SessionCustomExpiry()); |
| LOG.info("Created new local client session region: {}", regionName); |
| } else { |
| // Create the region factory without caching enabled |
| factory = this.cache.createClientRegionFactory(ClientRegionShortcut.PROXY); |
| LOG.info("Created new local client (uncached) session region: {} without any session expiry", |
| regionName); |
| } |
| |
| // Create the region |
| Region region = factory.create(regionName); |
| |
| if (enableLocalCache) { |
| region.registerInterestForAllKeys(InterestResultPolicy.KEYS); |
| } |
| return region; |
| } |
| } |