| /* |
| * 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.fluo.core.async; |
| |
| import java.util.Objects; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import com.codahale.metrics.Gauge; |
| import org.apache.fluo.core.impl.Environment; |
| import org.apache.fluo.core.impl.FluoConfigurationImpl; |
| import org.apache.fluo.core.util.Limit; |
| import org.apache.fluo.core.worker.TxResult; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class manage asynchronous commits of transactions. It blocks when transactions currently |
| * asynchronously committing are using too much memory. |
| * |
| * <p> |
| * This class also close transactions when finished and manages commit statistics so that each user |
| * of the queue does not have to. |
| */ |
| |
| public class CommitManager { |
| |
| private Limit memoryLimit; |
| private AtomicInteger commitingTransactions; |
| |
| public CommitManager(final Environment env) { |
| memoryLimit = new Limit(FluoConfigurationImpl.getTxCommitMemory(env.getConfiguration())); |
| commitingTransactions = new AtomicInteger(0); |
| |
| env.getSharedResources().getMetricRegistry().register( |
| env.getMetricNames().getCommitsProcessing(), |
| (Gauge<Integer>) () -> commitingTransactions.get()); |
| } |
| |
| |
| private class CQCommitObserver implements AsyncCommitObserver { |
| |
| private final AsyncTransaction tx; |
| private final AsyncCommitObserver aco; |
| private final int size; |
| private final AtomicBoolean finished = new AtomicBoolean(false); |
| private final String alias; |
| |
| private void finish(TxResult status) { |
| if (finished.compareAndSet(false, true)) { |
| commitingTransactions.decrementAndGet(); |
| tx.getStats().setCommitFinishTime(System.currentTimeMillis()); |
| tx.getStats().report(status.toString(), alias); |
| memoryLimit.release(size); |
| try { |
| tx.close(); |
| } catch (Exception e) { |
| LoggerFactory.getLogger(CommitManager.class).warn("Failed to close transaction ", e); |
| } |
| } |
| } |
| |
| public CQCommitObserver(AsyncTransaction tx, AsyncCommitObserver aco, String alias, int size) { |
| this.tx = tx; |
| this.aco = aco; |
| this.size = size; |
| this.alias = alias; |
| } |
| |
| @Override |
| public void committed() { |
| try { |
| // perform cleanup and close tx before notifying observer |
| finish(TxResult.COMMITTED); |
| } finally { |
| aco.committed(); |
| } |
| } |
| |
| @Override |
| public void failed(Throwable t) { |
| try { |
| // perform cleanup and close tx before notifying observer |
| finish(TxResult.ERROR); |
| } finally { |
| aco.failed(t); |
| } |
| } |
| |
| @Override |
| public void alreadyAcknowledged() { |
| try { |
| // perform cleanup and close tx before notifying observer |
| finish(TxResult.AACKED); |
| } finally { |
| aco.alreadyAcknowledged(); |
| } |
| } |
| |
| @Override |
| public void commitFailed(String msg) { |
| try { |
| // perform cleanup and close tx before notifying observer |
| finish(TxResult.COMMIT_EXCEPTION); |
| } finally { |
| aco.commitFailed(msg); |
| } |
| } |
| } |
| |
| |
| public void beginCommit(AsyncTransaction tx, String alias, AsyncCommitObserver aco) { |
| Objects.requireNonNull(tx); |
| Objects.requireNonNull(alias); |
| Objects.requireNonNull(aco); |
| |
| int size = tx.getSize(); |
| memoryLimit.acquire(size); |
| commitingTransactions.incrementAndGet(); |
| CQCommitObserver myAco = new CQCommitObserver(tx, aco, alias, size); |
| tx.getStats().setCommitBeginTime(System.currentTimeMillis()); |
| tx.commitAsync(myAco); |
| } |
| |
| /** |
| * Waits for all transactions submitted before method called to complete. |
| * |
| */ |
| public void close() { |
| // TODO should this wait? |
| } |
| } |