org.apache.pulsar.client.impl.transaction.TransactionBuilderImpl Maven / Gradle / Ivy
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* 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.client.impl.transaction;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.client.api.transaction.Transaction;
import org.apache.pulsar.client.api.transaction.TransactionBuilder;
import org.apache.pulsar.client.impl.PulsarClientImpl;
import org.apache.pulsar.common.util.FutureUtil;
/**
* The default implementation of transaction builder to build transactions.
*/
@Slf4j
public class TransactionBuilderImpl implements TransactionBuilder {
private final PulsarClientImpl client;
private final TransactionCoordinatorClientImpl transactionCoordinatorClient;
private long txnTimeout = 60000; // 1 minute
private TimeUnit timeUnit = TimeUnit.MILLISECONDS;
public TransactionBuilderImpl(PulsarClientImpl client, TransactionCoordinatorClientImpl tcClient) {
this.client = client;
this.transactionCoordinatorClient = tcClient;
}
@Override
public TransactionBuilder withTransactionTimeout(long txnTimeout, TimeUnit timeoutUnit) {
this.txnTimeout = txnTimeout;
this.timeUnit = timeoutUnit;
return this;
}
@Override
public CompletableFuture build() {
if (!client.getConfiguration().isEnableTransaction()) {
return FutureUtil.failedFuture(
new PulsarClientException.InvalidConfigurationException("Transactions are not enabled"));
}
// talk to TC to begin a transaction
// the builder is responsible for locating the transaction coordinator (TC)
// and start the transaction to get the transaction id.
// After getting the transaction id, all the operations are handled by the
// `TransactionImpl`
CompletableFuture future = new CompletableFuture<>();
transactionCoordinatorClient
.newTransactionAsync(txnTimeout, timeUnit)
.whenComplete((txnID, throwable) -> {
if (throwable != null) {
log.error("New transaction error.", throwable);
future.completeExceptionally(throwable);
return;
}
if (log.isDebugEnabled()) {
log.debug("'newTransaction' command completed successfully for transaction: {}", txnID);
}
TransactionImpl transaction = new TransactionImpl(client, timeUnit.toMillis(txnTimeout),
txnID.getLeastSigBits(), txnID.getMostSigBits());
future.complete(transaction);
});
return future;
}
}