trunk/camel-core/src/main/java/org/apache/camel/spi/SubUnitOfWork.java

/**
 * 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.camel.spi;

import java.util.List;

/**
 * A sub unit of work is a way of implement sub-transactions in Camel routing.
 * This is needed by some EIPs where you can have sub routes such as the Splitter.
 * The Camel end user may want to indicate that the Splitter should act as a
 * <b>single combined</b> unit of work.
 *
 * @see SubUnitOfWorkCallback
 */
public interface SubUnitOfWork {

    /**
     * Is the {@link SubUnitOfWork} marked as failed.
     *
     * @return <tt>true</tt> to indicate this sub unit of work is failed.
     */
    boolean isFailed();

    /**
     * If failed then a number of exceptions could have occurred, causing the {@link SubUnitOfWork} to fail.
     *
     * @return the caused exceptions.
     */
    List<Exception> getExceptions();

}