spring AbstractTransactionStatus 源码

spring AbstractTransactionStatus 代码

文件路径：/spring-tx/src/main/java/org/springframework/transaction/support/AbstractTransactionStatus.java

/*
 * Copyright 2002-2019 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.springframework.transaction.support;

import org.springframework.lang.Nullable;
import org.springframework.transaction.NestedTransactionNotSupportedException;
import org.springframework.transaction.SavepointManager;
import org.springframework.transaction.TransactionException;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.TransactionUsageException;

/**
 * Abstract base implementation of the
 * {@link org.springframework.transaction.TransactionStatus} interface.
 *
 * <p>Pre-implements the handling of local rollback-only and completed flags, and
 * delegation to an underlying {@link org.springframework.transaction.SavepointManager}.
 * Also offers the option of a holding a savepoint within the transaction.
 *
 * <p>Does not assume any specific internal transaction handling, such as an
 * underlying transaction object, and no transaction synchronization mechanism.
 *
 * @author Juergen Hoeller
 * @since 1.2.3
 * @see #setRollbackOnly()
 * @see #isRollbackOnly()
 * @see #setCompleted()
 * @see #isCompleted()
 * @see #getSavepointManager()
 * @see SimpleTransactionStatus
 * @see DefaultTransactionStatus
 */
public abstract class AbstractTransactionStatus implements TransactionStatus {

	private boolean rollbackOnly = false;

	private boolean completed = false;

	@Nullable
	private Object savepoint;


	//---------------------------------------------------------------------
	// Implementation of TransactionExecution
	//---------------------------------------------------------------------

	@Override
	public void setRollbackOnly() {
		this.rollbackOnly = true;
	}

	/**
	 * Determine the rollback-only flag via checking both the local rollback-only flag
	 * of this TransactionStatus and the global rollback-only flag of the underlying
	 * transaction, if any.
	 * @see #isLocalRollbackOnly()
	 * @see #isGlobalRollbackOnly()
	 */
	@Override
	public boolean isRollbackOnly() {
		return (isLocalRollbackOnly() || isGlobalRollbackOnly());
	}

	/**
	 * Determine the rollback-only flag via checking this TransactionStatus.
	 * <p>Will only return "true" if the application called {@code setRollbackOnly}
	 * on this TransactionStatus object.
	 */
	public boolean isLocalRollbackOnly() {
		return this.rollbackOnly;
	}

	/**
	 * Template method for determining the global rollback-only flag of the
	 * underlying transaction, if any.
	 * <p>This implementation always returns {@code false}.
	 */
	public boolean isGlobalRollbackOnly() {
		return false;
	}

	/**
	 * Mark this transaction as completed, that is, committed or rolled back.
	 */
	public void setCompleted() {
		this.completed = true;
	}

	@Override
	public boolean isCompleted() {
		return this.completed;
	}


	//---------------------------------------------------------------------
	// Handling of current savepoint state
	//---------------------------------------------------------------------

	@Override
	public boolean hasSavepoint() {
		return (this.savepoint != null);
	}

	/**
	 * Set a savepoint for this transaction. Useful for PROPAGATION_NESTED.
	 * @see org.springframework.transaction.TransactionDefinition#PROPAGATION_NESTED
	 */
	protected void setSavepoint(@Nullable Object savepoint) {
		this.savepoint = savepoint;
	}

	/**
	 * Get the savepoint for this transaction, if any.
	 */
	@Nullable
	protected Object getSavepoint() {
		return this.savepoint;
	}

	/**
	 * Create a savepoint and hold it for the transaction.
	 * @throws org.springframework.transaction.NestedTransactionNotSupportedException
	 * if the underlying transaction does not support savepoints
	 */
	public void createAndHoldSavepoint() throws TransactionException {
		setSavepoint(getSavepointManager().createSavepoint());
	}

	/**
	 * Roll back to the savepoint that is held for the transaction
	 * and release the savepoint right afterwards.
	 */
	public void rollbackToHeldSavepoint() throws TransactionException {
		Object savepoint = getSavepoint();
		if (savepoint == null) {
			throw new TransactionUsageException(
					"Cannot roll back to savepoint - no savepoint associated with current transaction");
		}
		getSavepointManager().rollbackToSavepoint(savepoint);
		getSavepointManager().releaseSavepoint(savepoint);
		setSavepoint(null);
	}

	/**
	 * Release the savepoint that is held for the transaction.
	 */
	public void releaseHeldSavepoint() throws TransactionException {
		Object savepoint = getSavepoint();
		if (savepoint == null) {
			throw new TransactionUsageException(
					"Cannot release savepoint - no savepoint associated with current transaction");
		}
		getSavepointManager().releaseSavepoint(savepoint);
		setSavepoint(null);
	}


	//---------------------------------------------------------------------
	// Implementation of SavepointManager
	//---------------------------------------------------------------------

	/**
	 * This implementation delegates to a SavepointManager for the
	 * underlying transaction, if possible.
	 * @see #getSavepointManager()
	 * @see SavepointManager#createSavepoint()
	 */
	@Override
	public Object createSavepoint() throws TransactionException {
		return getSavepointManager().createSavepoint();
	}

	/**
	 * This implementation delegates to a SavepointManager for the
	 * underlying transaction, if possible.
	 * @see #getSavepointManager()
	 * @see SavepointManager#rollbackToSavepoint(Object)
	 */
	@Override
	public void rollbackToSavepoint(Object savepoint) throws TransactionException {
		getSavepointManager().rollbackToSavepoint(savepoint);
	}

	/**
	 * This implementation delegates to a SavepointManager for the
	 * underlying transaction, if possible.
	 * @see #getSavepointManager()
	 * @see SavepointManager#releaseSavepoint(Object)
	 */
	@Override
	public void releaseSavepoint(Object savepoint) throws TransactionException {
		getSavepointManager().releaseSavepoint(savepoint);
	}

	/**
	 * Return a SavepointManager for the underlying transaction, if possible.
	 * <p>Default implementation always throws a NestedTransactionNotSupportedException.
	 * @throws org.springframework.transaction.NestedTransactionNotSupportedException
	 * if the underlying transaction does not support savepoints
	 */
	protected SavepointManager getSavepointManager() {
		throw new NestedTransactionNotSupportedException("This transaction does not support savepoints");
	}


	//---------------------------------------------------------------------
	// Flushing support
	//---------------------------------------------------------------------

	/**
	 * This implementation is empty, considering flush as a no-op.
	 */
	@Override
	public void flush() {
	}

}

相关信息

spring 源码目录

相关文章

spring AbstractPlatformTransactionManager 源码

spring CallbackPreferringPlatformTransactionManager 源码

spring DefaultTransactionDefinition 源码

spring DefaultTransactionStatus 源码

spring DelegatingTransactionDefinition 源码

spring ResourceHolder 源码

spring ResourceHolderSupport 源码

spring ResourceHolderSynchronization 源码

spring ResourceTransactionDefinition 源码

spring ResourceTransactionManager 源码