| /* |
| * 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.pulsar.broker.service; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.bookkeeper.mledger.Entry; |
| import org.apache.commons.collections4.CollectionUtils; |
| import org.apache.pulsar.broker.service.plugin.EntryFilter; |
| import org.apache.pulsar.broker.service.plugin.FilterContext; |
| import org.apache.pulsar.common.api.proto.MessageMetadata; |
| |
| public class EntryFilterSupport { |
| |
| protected final List<EntryFilter> entryFilters; |
| protected final boolean hasFilter; |
| protected final FilterContext filterContext; |
| protected final Subscription subscription; |
| |
| public EntryFilterSupport(Subscription subscription) { |
| this.subscription = subscription; |
| if (subscription != null && subscription.getTopic() != null) { |
| final BrokerService brokerService = subscription.getTopic().getBrokerService(); |
| final boolean allowOverrideEntryFilters = brokerService |
| .pulsar().getConfiguration().isAllowOverrideEntryFilters(); |
| if (!allowOverrideEntryFilters) { |
| this.entryFilters = brokerService.getEntryFilterProvider().getBrokerEntryFilters(); |
| } else { |
| List<EntryFilter> topicEntryFilters = |
| subscription.getTopic().getEntryFilters(); |
| if (topicEntryFilters != null && !topicEntryFilters.isEmpty()) { |
| this.entryFilters = topicEntryFilters; |
| } else { |
| this.entryFilters = brokerService.getEntryFilterProvider().getBrokerEntryFilters(); |
| } |
| } |
| this.filterContext = new FilterContext(); |
| } else { |
| this.entryFilters = Collections.emptyList(); |
| this.filterContext = FilterContext.FILTER_CONTEXT_DISABLED; |
| } |
| hasFilter = CollectionUtils.isNotEmpty(entryFilters); |
| } |
| |
| public EntryFilter.FilterResult runFiltersForEntry(Entry entry, MessageMetadata msgMetadata, |
| Consumer consumer) { |
| if (hasFilter) { |
| fillContext(filterContext, msgMetadata, subscription, consumer); |
| return getFilterResult(filterContext, entry, entryFilters); |
| } else { |
| return EntryFilter.FilterResult.ACCEPT; |
| } |
| } |
| |
| private void fillContext(FilterContext context, MessageMetadata msgMetadata, |
| Subscription subscription, Consumer consumer) { |
| context.reset(); |
| context.setMsgMetadata(msgMetadata); |
| context.setSubscription(subscription); |
| context.setConsumer(consumer); |
| } |
| |
| |
| private static EntryFilter.FilterResult getFilterResult(FilterContext filterContext, Entry entry, |
| List<EntryFilter> entryFilters) { |
| for (EntryFilter entryFilter : entryFilters) { |
| EntryFilter.FilterResult filterResult = |
| entryFilter.filterEntry(entry, filterContext); |
| if (filterResult == null) { |
| filterResult = EntryFilter.FilterResult.ACCEPT; |
| } |
| if (filterResult != EntryFilter.FilterResult.ACCEPT) { |
| return filterResult; |
| } |
| } |
| return EntryFilter.FilterResult.ACCEPT; |
| } |
| } |