| /* |
| * 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.geode.internal.cache; |
| |
| import java.util.function.BooleanSupplier; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.CancelCriterion; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| public class AfterCompletion { |
| private static final Logger logger = LogService.getLogger(); |
| |
| private boolean started; |
| private boolean finished; |
| private RuntimeException exception; |
| |
| private enum Action { |
| COMMIT, ROLLBACK, CANCEL |
| }; |
| |
| private Action action; |
| |
| public synchronized void doOp(TXState txState, CancelCriterion cancelCriterion) { |
| // there should be a transaction timeout that keeps this thread |
| // from sitting around forever if the client goes away |
| // The above was done by setting afterCompletionCancelled in txState |
| // during cleanup. When client departed, the transaction/JTA |
| // will be timed out and cleanup code will be executed. |
| try { |
| waitForExecuteOrCancel(cancelCriterion); |
| } catch (RuntimeException | Error ignore) { |
| action = Action.CANCEL; |
| } |
| started = true; |
| logger.debug("executing afterCompletion notification"); |
| try { |
| switch (action) { |
| case CANCEL: |
| txState.doCleanup(); |
| break; |
| case COMMIT: |
| txState.doAfterCompletionCommit(); |
| break; |
| case ROLLBACK: |
| txState.doAfterCompletionRollback(); |
| break; |
| } |
| } catch (RuntimeException exception) { |
| this.exception = exception; |
| } finally { |
| logger.debug("afterCompletion notification completed"); |
| finished = true; |
| notifyAll(); |
| } |
| } |
| |
| private void waitForExecuteOrCancel(CancelCriterion cancelCriterion) { |
| waitForCondition(cancelCriterion, () -> action != null); |
| } |
| |
| private synchronized void waitForCondition(CancelCriterion cancelCriterion, |
| BooleanSupplier condition) { |
| while (!condition.getAsBoolean()) { |
| if (cancelCriterion != null) { |
| cancelCriterion.checkCancelInProgress(null); |
| } |
| try { |
| logger.debug("waiting for notification"); |
| wait(1000); |
| } catch (InterruptedException ignore) { |
| // eat the interrupt and check for exit conditions |
| } |
| } |
| } |
| |
| public void executeCommit() { |
| executeAction(Action.COMMIT); |
| } |
| |
| public void executeRollback() { |
| executeAction(Action.ROLLBACK); |
| } |
| |
| private synchronized void executeAction(Action action) { |
| this.action = action; |
| signalAndWaitForDoOp(); |
| if (exception != null) { |
| throw exception; |
| } |
| |
| } |
| |
| private void signalAndWaitForDoOp() { |
| notifyAll(); |
| waitUntilFinished(); |
| } |
| |
| private void waitUntilFinished() { |
| waitForCondition(null, () -> finished); |
| } |
| |
| public synchronized void cancel() { |
| action = Action.CANCEL; |
| signalAndWaitForDoOp(); |
| } |
| |
| public synchronized boolean isStarted() { |
| return started; |
| } |
| } |