org.apache.syncope.core.workflow.user.activiti.ActivitiWorkflowLoader.java Source code

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Here is the source code for org.apache.syncope.core.workflow.user.activiti.ActivitiWorkflowLoader.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 org.apache.syncope.core.workflow.user.activiti;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.syncope.core.workflow.WorkflowInstanceLoader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

public class ActivitiWorkflowLoader implements WorkflowInstanceLoader {

    private static final Logger LOG = LoggerFactory.getLogger(ActivitiWorkflowLoader.class);

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private SpringProcessEngineConfiguration conf;

    @Autowired
    private ActivitiImportUtils activitiJSONUtils;

    @Override
    public String getTablePrefix() {
        return "ACT_";
    }

    @Override
    public void init() {
        // jump to the next ID block
        for (int i = 0; i < conf.getIdBlockSize(); i++) {
            conf.getIdGenerator().getNextId();
        }
    }

    @Override
    public void load() {
        List<ProcessDefinition> processes = repositoryService.createProcessDefinitionQuery()
                .processDefinitionKey(ActivitiUserWorkflowAdapter.WF_PROCESS_ID).list();
        LOG.debug(ActivitiUserWorkflowAdapter.WF_PROCESS_ID + " Activiti processes in repository: {}", processes);

        // Only loads process definition from file if not found in repository
        if (processes.isEmpty()) {
            InputStream wfIn = null;
            try {
                wfIn = getClass().getResourceAsStream("/" + ActivitiUserWorkflowAdapter.WF_PROCESS_RESOURCE);
                repositoryService.createDeployment().addInputStream(ActivitiUserWorkflowAdapter.WF_PROCESS_RESOURCE,
                        new ByteArrayInputStream(IOUtils.toByteArray(wfIn))).deploy();

                ProcessDefinition procDef = repositoryService.createProcessDefinitionQuery()
                        .processDefinitionKey(ActivitiUserWorkflowAdapter.WF_PROCESS_ID).latestVersion()
                        .singleResult();

                Model model = repositoryService.newModel();
                ObjectNode modelObjectNode = new ObjectMapper().createObjectNode();
                modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, procDef.getName());
                modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1);
                modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, procDef.getDescription());
                model.setMetaInfo(modelObjectNode.toString());
                model.setName(procDef.getName());
                model.setDeploymentId(procDef.getDeploymentId());
                activitiJSONUtils.fromJSON(procDef, model);

                LOG.debug("Activiti Workflow definition loaded");
            } catch (IOException e) {
                LOG.error("While loading " + ActivitiUserWorkflowAdapter.WF_PROCESS_RESOURCE, e);
            } finally {
                IOUtils.closeQuietly(wfIn);
            }
        }
    }
}