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[FLINK-25421] Port JDBC Sink to new Unified Sink API (FLIP-143)
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208 changes: 208 additions & 0 deletions
208
...rg/apache/flink/connector/jdbc/datasource/connections/xa/PoolingXaConnectionProvider.java
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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. | ||
| */ | ||
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| package org.apache.flink.connector.jdbc.datasource.connections.xa; | ||
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| import org.apache.flink.annotation.Internal; | ||
| import org.apache.flink.connector.jdbc.datasource.transactions.xa.exceptions.TransientXaException; | ||
| import org.apache.flink.util.function.ThrowingConsumer; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import javax.annotation.Nullable; | ||
| import javax.sql.XADataSource; | ||
| import javax.transaction.xa.Xid; | ||
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| import java.io.Serializable; | ||
| import java.sql.Connection; | ||
| import java.sql.SQLException; | ||
| import java.util.Collection; | ||
| import java.util.Deque; | ||
| import java.util.HashMap; | ||
| import java.util.LinkedList; | ||
| import java.util.Map; | ||
| import java.util.function.Supplier; | ||
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| import static org.apache.flink.util.ExceptionUtils.rethrow; | ||
| import static org.apache.flink.util.Preconditions.checkState; | ||
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| /** | ||
| * A "pooling" implementation of {@link XaConnectionProvider}. Some database implement XA such that | ||
| * one connection is limited to a single transaction. As a workaround, this implementation creates a | ||
| * new XA resource after each xa_start call is made (and associates it with the xid to commit | ||
| * later). | ||
| */ | ||
| @Internal | ||
| public class PoolingXaConnectionProvider implements XaConnectionProvider { | ||
| private static final long serialVersionUID = 1L; | ||
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| /** A supplier of connection provider. */ | ||
| public interface ConnectionProviderSupplier | ||
| extends Serializable, Supplier<XaConnectionProvider> {} | ||
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| private static final Logger LOG = LoggerFactory.getLogger(PoolingXaConnectionProvider.class); | ||
| private final ConnectionProviderSupplier providerSupplier; | ||
| private transient XaConnectionProvider active; | ||
| private transient Map<Xid, XaConnectionProvider> mappedToXids; | ||
| private transient Deque<XaConnectionProvider> pooled; | ||
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| public static PoolingXaConnectionProvider from( | ||
| Supplier<XADataSource> dataSourceSupplier, Integer timeoutSec) { | ||
| return from(() -> SimpleXaConnectionProvider.from(dataSourceSupplier, timeoutSec)); | ||
| } | ||
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| public static PoolingXaConnectionProvider from(ConnectionProviderSupplier facadeSupplier) { | ||
| return new PoolingXaConnectionProvider(facadeSupplier); | ||
| } | ||
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| private PoolingXaConnectionProvider(ConnectionProviderSupplier facadeSupplier) { | ||
| this.providerSupplier = facadeSupplier; | ||
| } | ||
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| @Override | ||
| public void open() throws Exception { | ||
| checkState(active == null); | ||
| pooled = new LinkedList<>(); | ||
| mappedToXids = new HashMap<>(); | ||
| } | ||
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| @Override | ||
| public boolean isOpen() { | ||
| return active != null && active.isOpen(); | ||
| } | ||
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| @Override | ||
| public void start(Xid xid) throws Exception { | ||
| checkState(active == null); | ||
| if (pooled.isEmpty()) { | ||
| active = providerSupplier.get(); | ||
| active.open(); | ||
| } else { | ||
| active = pooled.poll(); | ||
| } | ||
| active.start(xid); | ||
| mappedToXids.put(xid, active); | ||
| } | ||
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| /** | ||
| * Must be called after {@link #start(Xid)} with the same {@link Xid}. | ||
| * | ||
| * @see XaConnectionProvider#endAndPrepare(Xid) | ||
| */ | ||
| @Override | ||
| public void endAndPrepare(Xid xid) throws Exception { | ||
| checkState(active == mappedToXids.get(xid)); | ||
| try { | ||
| active.endAndPrepare(xid); | ||
| } finally { | ||
| active = null; | ||
| } | ||
| } | ||
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| @Override | ||
| public void commit(Xid xid, boolean ignoreUnknown) throws TransientXaException { | ||
| runForXid(xid, facade -> facade.commit(xid, ignoreUnknown)); | ||
| } | ||
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| @Override | ||
| public void rollback(Xid xid) throws TransientXaException { | ||
| runForXid(xid, facade -> facade.rollback(xid)); | ||
| } | ||
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| @Override | ||
| public void failAndRollback(Xid xid) throws TransientXaException { | ||
| runForXid(xid, facade -> facade.failAndRollback(xid)); | ||
| } | ||
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| @Override | ||
| public Collection<Xid> recover() throws TransientXaException { | ||
| return peekPooled().recover(); | ||
| } | ||
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| @Override | ||
| public void close() throws Exception { | ||
| for (XaConnectionProvider facade : mappedToXids.values()) { | ||
| facade.close(); | ||
| } | ||
| for (XaConnectionProvider facade : pooled) { | ||
| facade.close(); | ||
| } | ||
| if (active != null && active.isOpen()) { | ||
| active.close(); | ||
| } | ||
| } | ||
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| @Nullable | ||
| @Override | ||
| public Connection getConnection() { | ||
| return active.getConnection(); | ||
| } | ||
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| @Override | ||
| public boolean isConnectionValid() throws SQLException { | ||
| return active.isConnectionValid(); | ||
| } | ||
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| @Override | ||
| public Connection getOrEstablishConnection() throws SQLException, ClassNotFoundException { | ||
| return active.getOrEstablishConnection(); | ||
| } | ||
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| @Override | ||
| public void closeConnection() { | ||
| active.closeConnection(); | ||
| } | ||
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| @Override | ||
| public Connection reestablishConnection() throws SQLException, ClassNotFoundException { | ||
| return active.reestablishConnection(); | ||
| } | ||
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| // WARN: action MUST leave the facade in IDLE state (i.e. not start/end/prepare any tx) | ||
| private void runForXid( | ||
| Xid xid, ThrowingConsumer<XaConnectionProvider, TransientXaException> action) { | ||
| XaConnectionProvider mapped = mappedToXids.remove(xid); | ||
| if (mapped == null) { | ||
| // a transaction can be not known during recovery | ||
| LOG.debug("No XA resource found associated with XID: {}", xid); | ||
| action.accept(peekPooled()); | ||
| } else { | ||
| LOG.debug("Found mapped XA resource for XID: {} {}", xid, mapped); | ||
| try { | ||
| action.accept(mapped); | ||
| } finally { | ||
| pooled.offer(mapped); | ||
| } | ||
| } | ||
| } | ||
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| // WARN: the returned facade MUST be left in IDLE state (i.e. not start/end/prepare any tx) | ||
| private XaConnectionProvider peekPooled() { | ||
| XaConnectionProvider xaFacade = pooled.peek(); | ||
| if (xaFacade == null) { | ||
| xaFacade = providerSupplier.get(); | ||
| try { | ||
| xaFacade.open(); | ||
| } catch (Exception e) { | ||
| rethrow(e); | ||
| } | ||
| pooled.offer(xaFacade); | ||
| } | ||
| return xaFacade; | ||
| } | ||
| } |
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