org.activiti.spring.SpringTransactionInterceptor.java Source code

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Here is the source code for org.activiti.spring.SpringTransactionInterceptor.java

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/* 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
 * 
 *      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.activiti.spring;

import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandInterceptor;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;

/**
 * @author Dave Syer
 * @author Tom Baeyens
 */
public class SpringTransactionInterceptor extends CommandInterceptor {

    protected PlatformTransactionManager transactionManager;
    protected int transactionPropagation;

    public SpringTransactionInterceptor(PlatformTransactionManager transactionManager, int transactionPropagation) {
        this.transactionManager = transactionManager;
        this.transactionPropagation = transactionPropagation;
    }

    @SuppressWarnings("unchecked")
    public <T> T execute(final Command<T> command) {
        TransactionTemplate transactionTemplate = new TransactionTemplate(transactionManager);
        transactionTemplate.setPropagationBehavior(transactionPropagation);
        T result = (T) transactionTemplate.execute(new TransactionCallback() {
            public Object doInTransaction(TransactionStatus status) {
                return next.execute(command);
            }
        });
        return result;
    }
}