| /** |
| * 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.Map; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ConcurrentHashMap; |
| import org.apache.pulsar.broker.systopic.NamespaceEventsSystemTopicFactory; |
| import org.apache.pulsar.broker.systopic.SystemTopicClient; |
| import org.apache.pulsar.broker.systopic.SystemTopicClient.Reader; |
| import org.apache.pulsar.broker.systopic.SystemTopicClient.Writer; |
| import org.apache.pulsar.broker.systopic.TransactionBufferSystemTopicClient; |
| import org.apache.pulsar.broker.transaction.buffer.matadata.TransactionBufferSnapshot; |
| import org.apache.pulsar.client.api.PulsarClient; |
| import org.apache.pulsar.client.api.PulsarClientException.InvalidTopicNameException; |
| import org.apache.pulsar.common.events.EventType; |
| import org.apache.pulsar.common.naming.TopicName; |
| import org.apache.pulsar.common.util.FutureUtil; |
| |
| public class SystemTopicBaseTxnBufferSnapshotService implements TransactionBufferSnapshotService { |
| |
| private final Map<TopicName, SystemTopicClient<TransactionBufferSnapshot>> clients; |
| |
| private final NamespaceEventsSystemTopicFactory namespaceEventsSystemTopicFactory; |
| |
| public SystemTopicBaseTxnBufferSnapshotService(PulsarClient client) { |
| this.namespaceEventsSystemTopicFactory = new NamespaceEventsSystemTopicFactory(client); |
| this.clients = new ConcurrentHashMap<>(); |
| } |
| |
| @Override |
| public CompletableFuture<Writer<TransactionBufferSnapshot>> createWriter(TopicName topicName) { |
| return getTransactionBufferSystemTopicClient(topicName).thenCompose(SystemTopicClient::newWriterAsync); |
| } |
| |
| private CompletableFuture<SystemTopicClient<TransactionBufferSnapshot>> getTransactionBufferSystemTopicClient( |
| TopicName topicName) { |
| TopicName systemTopicName = NamespaceEventsSystemTopicFactory |
| .getSystemTopicName(topicName.getNamespaceObject(), EventType.TRANSACTION_BUFFER_SNAPSHOT); |
| if (systemTopicName == null) { |
| return FutureUtil.failedFuture( |
| new InvalidTopicNameException("Can't create SystemTopicBaseTxnBufferSnapshotService, " |
| + "because the topicName is null!")); |
| } |
| return CompletableFuture.completedFuture(clients.computeIfAbsent(systemTopicName, |
| (v) -> namespaceEventsSystemTopicFactory |
| .createTransactionBufferSystemTopicClient(topicName.getNamespaceObject(), this))); |
| } |
| |
| @Override |
| public CompletableFuture<Reader<TransactionBufferSnapshot>> createReader(TopicName topicName) { |
| return getTransactionBufferSystemTopicClient(topicName).thenCompose(SystemTopicClient::newReaderAsync); |
| } |
| |
| @Override |
| public void removeClient(TopicName topicName, |
| TransactionBufferSystemTopicClient transactionBufferSystemTopicClient) { |
| if (transactionBufferSystemTopicClient.getReaders().size() == 0 |
| && transactionBufferSystemTopicClient.getWriters().size() == 0) { |
| clients.remove(topicName); |
| } |
| } |
| |
| @Override |
| public void close() throws Exception { |
| for (Map.Entry<TopicName, SystemTopicClient<TransactionBufferSnapshot>> entry : clients.entrySet()) { |
| entry.getValue().close(); |
| } |
| } |
| } |