| /* |
| * 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.qpid.server.user.connection.limits.config; |
| |
| import java.time.Duration; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicReference; |
| import java.util.function.Function; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.qpid.server.logging.EventLoggerProvider; |
| import org.apache.qpid.server.security.limit.ConnectionLimitException; |
| import org.apache.qpid.server.security.limit.ConnectionLimiter; |
| import org.apache.qpid.server.security.limit.ConnectionSlot; |
| import org.apache.qpid.server.transport.AMQPConnection; |
| import org.apache.qpid.server.user.connection.limits.logging.ConnectionLimitEventLogger; |
| import org.apache.qpid.server.user.connection.limits.logging.FullConnectionLimitEventLogger; |
| import org.apache.qpid.server.user.connection.limits.outcome.RejectRegistration; |
| |
| final class RuleSetImpl implements RuleSet |
| { |
| private static final Logger LOGGER = LoggerFactory.getLogger(RuleSet.class); |
| |
| private final String _name; |
| |
| private final Function<EventLoggerProvider, ConnectionLimitEventLogger> _loggerFactory; |
| |
| private final Map<String, PortConnectionCounter> _portConnectionCounters; |
| |
| private final Function<String, PortConnectionCounter> _defaultPortConnectionCounterProvider; |
| |
| private final AtomicReference<ConnectionLimiter> _appendedLimiter; |
| |
| RuleSetImpl(RuleSetBuilderImpl builder) |
| { |
| _name = builder.getName(); |
| _loggerFactory = builder.getLoggerFactory(); |
| _portConnectionCounters = new ConcurrentHashMap<>(builder.getPortConnectionCounters()); |
| _defaultPortConnectionCounterProvider = builder.getDefaultPortConnectionCounterProvider(); |
| _appendedLimiter = new AtomicReference<>(ConnectionLimiter.noLimits()); |
| } |
| |
| private RuleSetImpl(RuleSetImpl ruleSet, ConnectionLimiter limiter) |
| { |
| _name = ruleSet._name; |
| _loggerFactory = ruleSet._loggerFactory; |
| _portConnectionCounters = ruleSet._portConnectionCounters; |
| _defaultPortConnectionCounterProvider = ruleSet._defaultPortConnectionCounterProvider; |
| _appendedLimiter = new AtomicReference<>(limiter); |
| } |
| |
| @Override |
| public ConnectionSlot register(AMQPConnection<?> connection) |
| { |
| try |
| { |
| return _portConnectionCounters.computeIfAbsent(connection.getPort().getName(), _defaultPortConnectionCounterProvider) |
| .register(connection, _appendedLimiter.get()) |
| .logMessage(_loggerFactory.apply(connection)); |
| } |
| catch (RejectRegistration result) |
| { |
| LOGGER.debug(String.format("Connection limiter %s, user limit exceeded", _name), result); |
| throw new ConnectionLimitException(result.logMessage(_loggerFactory.apply(connection))); |
| } |
| } |
| |
| @Override |
| public ConnectionLimiter append(final ConnectionLimiter limiter) |
| { |
| return new RuleSetImpl(this, _appendedLimiter.get().append(limiter)); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return _name; |
| } |
| |
| static final class RuleSetBuilderImpl implements Builder |
| { |
| private final String _name; |
| |
| private final List<Rule> _forAllPorts = new ArrayList<>(); |
| |
| private final Duration _defaultFrequencyPeriod; |
| |
| private final Map<String, PortConnectionCounter.Builder> _builders; |
| |
| private final PortConnectionCounter.Builder _defaultBuilder; |
| |
| private Function<EventLoggerProvider, ConnectionLimitEventLogger> _loggerFactory; |
| |
| RuleSetBuilderImpl(String name, Duration defaultFrequencyPeriod) |
| { |
| super(); |
| _name = name; |
| _defaultFrequencyPeriod = defaultFrequencyPeriod; |
| _loggerFactory = loggerProvider -> new ConnectionLimitEventLogger(name, loggerProvider); |
| |
| _builders = new HashMap<>(); |
| _defaultBuilder = PortConnectionCounter.newBuilder(defaultFrequencyPeriod); |
| } |
| |
| @Override |
| public Builder logAllMessages(boolean all) |
| { |
| if (all) |
| { |
| _loggerFactory = loggerProvider -> new FullConnectionLimitEventLogger(_name, loggerProvider); |
| } |
| else |
| { |
| _loggerFactory = loggerProvider -> new ConnectionLimitEventLogger(_name, loggerProvider); |
| } |
| return this; |
| } |
| |
| @Override |
| public Builder addRule(Rule rule) |
| { |
| addRuleImpl(rule); |
| return this; |
| } |
| |
| @Override |
| public Builder addRules(Collection<? extends Rule> rules) |
| { |
| if (rules != null) |
| { |
| rules.forEach(this::addRuleImpl); |
| } |
| return this; |
| } |
| |
| private void addRuleImpl(Rule rule) |
| { |
| if (rule == null) |
| { |
| return; |
| } |
| |
| final String port = rule.getPort(); |
| if (RulePredicates.isAllPort(port)) |
| { |
| _forAllPorts.add(rule); |
| _defaultBuilder.add(rule); |
| _builders.values().forEach(builder -> builder.add(rule)); |
| } |
| else |
| { |
| _builders.computeIfAbsent( |
| port, |
| portName -> PortConnectionCounter.newBuilder(_defaultFrequencyPeriod).addAll(_forAllPorts) |
| ).add(rule); |
| } |
| } |
| |
| @Override |
| public RuleSet build() |
| { |
| return new RuleSetImpl(this); |
| } |
| |
| Function<EventLoggerProvider, ConnectionLimitEventLogger> getLoggerFactory() |
| { |
| return _loggerFactory; |
| } |
| |
| Map<String, PortConnectionCounter> getPortConnectionCounters() |
| { |
| final Map<String, PortConnectionCounter> limiters = new HashMap<>(); |
| _builders.forEach((port, builder) -> limiters.put(port, builder.build())); |
| return limiters; |
| } |
| |
| Function<String, PortConnectionCounter> getDefaultPortConnectionCounterProvider() |
| { |
| return portName -> _defaultBuilder.build(); |
| } |
| |
| String getName() |
| { |
| return _name; |
| } |
| } |
| } |