codelipenghui commented on a change in pull request #5570: Transaction log implemention URL: https://github.com/apache/pulsar/pull/5570#discussion_r346194349
########## File path: pulsar-transaction/coordinator/src/main/java/org/apache/pulsar/transaction/coordinator/impl/ManagedLedgerTransactionReaderImpl.java ########## @@ -0,0 +1,212 @@ +/** + * 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.transaction.coordinator.impl; + +import io.netty.buffer.ByteBuf; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ConcurrentMap; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.atomic.AtomicLong; + +import org.apache.bookkeeper.mledger.AsyncCallbacks.ReadEntriesCallback; +import org.apache.bookkeeper.mledger.Entry; +import org.apache.bookkeeper.mledger.ManagedLedgerConfig; +import org.apache.bookkeeper.mledger.ManagedLedgerException; +import org.apache.bookkeeper.mledger.ManagedLedgerFactory; +import org.apache.bookkeeper.mledger.ReadOnlyCursor; +import org.apache.bookkeeper.mledger.impl.PositionImpl; +import org.apache.pulsar.common.api.proto.PulsarApi.Subscription; +import org.apache.pulsar.common.api.proto.PulsarApi.TransactionMetadataEntry; +import org.apache.pulsar.common.api.proto.PulsarApi.TxnStatus; +import org.apache.pulsar.common.util.protobuf.ByteBufCodedInputStream; +import org.apache.pulsar.transaction.coordinator.TransactionMetadataStore; +import org.apache.pulsar.transaction.coordinator.TxnMeta; +import org.apache.pulsar.transaction.coordinator.TxnSubscription; +import org.apache.pulsar.transaction.coordinator.exceptions.InvalidTxnStatusException; +import org.apache.pulsar.transaction.impl.common.TxnID; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +class ManagedLedgerTransactionReaderImpl implements + ManagedLedgerTransactionMetadataStore.ManagedLedgerTransactionReader { + + private static final Logger log = LoggerFactory.getLogger(ManagedLedgerTransactionReaderImpl.class); + + private ConcurrentMap<TxnID, TxnMeta> txnMetaMap = new ConcurrentHashMap<>(); + + private AtomicLong sequenceId = new AtomicLong(ManagedLedgerTransactionMetadataStore.TC_ID_NOT_USED); + + private final ReadOnlyCursor readOnlyCursor; + + public ManagedLedgerTransactionReaderImpl(String tcId, ManagedLedgerFactory managedLedgerFactory) throws Exception { + this.readOnlyCursor = managedLedgerFactory + .openReadOnlyCursor(tcId, + PositionImpl.earliest, new ManagedLedgerConfig()); + } + + private static List<TxnSubscription> subscriptionToTxnSubscription(List<Subscription> subscriptions) { + List<TxnSubscription> txnSubscriptions = new ArrayList<>(subscriptions.size()); + for (int i = 0; i < subscriptions.size(); i++) { + txnSubscriptions + .add(new TxnSubscription(subscriptions.get(i).getTopic(), subscriptions.get(i).getSubscription())); + } + return txnSubscriptions; + } + + + @Override + public TxnMeta getTxnMeta(TxnID txnID) { + return txnMetaMap.get(txnID); + } + + @Override + public Long readSequenceId() { + return sequenceId.get(); + } + + @Override + public void addNewTxn(TxnMeta txnMeta) { + txnMetaMap.put(txnMeta.id(), txnMeta); + } + + @Override + public TxnStatus getTxnStatus(TxnID txnID) { + return txnMetaMap.get(txnID).status(); + } + + @Override + public CompletableFuture<Void> init(TransactionMetadataStore transactionMetadataStore) { + CountDownLatch countDownLatch = new CountDownLatch(1); + countDownLatch.countDown(); + CompletableFuture<Void> completableFuture = new CompletableFuture<>(); + transactionMetadataStore.updateMetadataStoreState(TransactionMetadataStore.State.INITIALIZING); + readOnlyCursor + .asyncReadEntries(100, + new ReaderReadEntriesCallback(countDownLatch, txnMetaMap, sequenceId, Review comment: Also, expose configs for each read batch size. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
