com.glaf.activiti.tasklistener.CancelAllTaskListener.java Source code

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Here is the source code for com.glaf.activiti.tasklistener.CancelAllTaskListener.java

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/*
 * 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 com.glaf.activiti.tasklistener;

import java.util.Iterator;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.Expression;
import org.activiti.engine.delegate.TaskListener;
import org.activiti.engine.impl.TaskQueryImpl;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.TaskEntity;
import org.activiti.engine.task.Task;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.glaf.core.util.StringTools;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

public class CancelAllTaskListener implements TaskListener {
    private static final long serialVersionUID = 1L;

    protected final static Log logger = LogFactory.getLog(CancelAllTaskListener.class);

    private static Cache<String, Object> cache = CacheBuilder.newBuilder().maximumSize(1000)
            .expireAfterAccess(5, TimeUnit.MINUTES).build();

    protected Expression conditionExpression;

    protected Expression includesExpression;

    @Override
    public void notify(DelegateTask delegateTask) {
        logger.debug("----------------------------------------------------");
        logger.debug("---------------CancelAllTaskListener----------------");
        logger.debug("----------------------------------------------------");

        logger.debug("cucrent task: " + delegateTask.getName());
        logger.debug("cucrent taskDefinitionKey: " + delegateTask.getTaskDefinitionKey());

        if (conditionExpression != null) {
            logger.debug("variables:" + delegateTask.getVariables());
            logger.debug("conditionExpression:" + conditionExpression.getExpressionText());
            Object value = conditionExpression.getValue(delegateTask);
            if (value != null) {
                logger.debug("condition:" + value);
                if (value instanceof Boolean) {
                    Boolean b = (Boolean) value;
                    if (!b.booleanValue()) {
                        return;
                    }
                }
            }
        }

        CommandContext commandContext = Context.getCommandContext();

        TaskQueryImpl taskQuery = new TaskQueryImpl();
        taskQuery.processInstanceId(delegateTask.getProcessInstanceId());

        List<Task> tasks = commandContext.getTaskEntityManager().findTasksByQueryCriteria(taskQuery);
        logger.debug("tasks:" + tasks);
        if (tasks != null && !tasks.isEmpty()) {
            String includes = null;
            if (includesExpression != null) {
                includes = (String) includesExpression.getValue(delegateTask);
            }
            List<String> list = new java.util.ArrayList<String>();
            if (includes != null && includes.trim().length() > 0) {
                list = StringTools.split(includes);
            }

            cache.put("ACT_TASK_" + delegateTask.getId(), "1");

            Iterator<Task> iterator = tasks.iterator();
            while (iterator.hasNext()) {
                Task task = iterator.next();
                String cacheKey = "ACT_TASK_" + task.getId();
                if (StringUtils.equals(task.getTaskDefinitionKey(), delegateTask.getTaskDefinitionKey())) {
                    logger.debug(task.getTaskDefinitionKey() + " [" + task.getName() + "] skiped.");
                    cache.put(cacheKey, "1");
                    continue;
                }

                if (list != null && !list.isEmpty()) {
                    if (!list.contains(task.getTaskDefinitionKey())) {
                        continue;
                    }
                }

                if (task instanceof TaskEntity) {
                    TaskEntity taskEntity = (TaskEntity) task;
                    if (cache.getIfPresent(cacheKey) == null) {
                        cache.put(cacheKey, "1");
                        logger.debug(
                                taskEntity.getTaskDefinitionKey() + " [" + taskEntity.getName() + "] canceled");
                        //taskEntity.complete();
                    }
                }
            }
        }
    }

    public void setIncludesExpression(Expression includesExpression) {
        this.includesExpression = includesExpression;
    }

    public void setConditionExpression(Expression conditionExpression) {
        this.conditionExpression = conditionExpression;
    }

}