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package io.hmit.modules.activiti.service;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import io.hmit.common.constant.Constant;
import io.hmit.common.exception.ErrorCode;
import io.hmit.common.exception.HmitException;
import io.hmit.common.page.PageData;
import org.activiti.bpmn.converter.BpmnXMLConverter;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.editor.language.json.converter.BpmnJsonConverter;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.Model;
import org.activiti.engine.repository.ModelQuery;
import org.activiti.engine.repository.ProcessDefinition;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
/**
* 模型管理
*
* @author zsh 408538940@qq.com
*/
@Service
public class ActModelService {
@Autowired
protected RepositoryService repositoryService;
@Autowired
private ObjectMapper objectMapper;
public PageData<Model> page(Map<String, Object> params) {
String key = (String) params.get("key");
String name = (String) params.get("name");
//分页参数
int curPage = 1;
int limit = 10;
if (params.get(Constant.PAGE) != null) {
curPage = Integer.parseInt((String) params.get(Constant.PAGE));
}
if (params.get(Constant.LIMIT) != null) {
limit = Integer.parseInt((String) params.get(Constant.LIMIT));
}
ModelQuery modelQuery = repositoryService.createModelQuery().latestVersion().orderByLastUpdateTime().desc();
if (StringUtils.isNotEmpty(key)) {
modelQuery.modelKey(key);
}
if (StringUtils.isNotEmpty(name)) {
modelQuery.modelName(name);
}
List<Model> list = modelQuery.listPage((curPage - 1) * limit, limit);
return new PageData<>(list, (int) modelQuery.count());
}
public void save(String name, String key, String description) throws UnsupportedEncodingException {
//新建一个空模型
Model model = repositoryService.newModel();
//metaInfo信息
ObjectNode metaInfo = objectMapper.createObjectNode();
metaInfo.put(ModelDataJsonConstants.MODEL_NAME, name);
metaInfo.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
metaInfo.put(ModelDataJsonConstants.MODEL_REVISION, model.getVersion());
model.setKey(key);
model.setName(name);
model.setMetaInfo(metaInfo.toString());
repositoryService.saveModel(model);
ObjectNode editorNode = objectMapper.createObjectNode();
editorNode.put("id", "canvas");
editorNode.put("resourceId", "canvas");
ObjectNode stencilset = objectMapper.createObjectNode();
stencilset.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");
editorNode.set("stencilset", stencilset);
repositoryService.addModelEditorSource(model.getId(), editorNode.toString().getBytes("utf-8"));
}
public void deploy(String id) {
try {
Model model = repositoryService.getModel(id);
BpmnJsonConverter jsonConverter = new BpmnJsonConverter();
JsonNode editorNode = new ObjectMapper().readTree(repositoryService.getModelEditorSource(model.getId()));
BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editorNode);
BpmnXMLConverter xmlConverter = new BpmnXMLConverter();
byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel);
if (bpmnModel.getProcesses().isEmpty()) {
throw new HmitException(ErrorCode.ACT_DEPLOY_ERROR);
}
String processName = model.getName();
if (!StringUtils.endsWith(processName, ".bpmn20.xml")) {
processName += ".bpmn20.xml";
}
ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes);
Deployment deployment = repositoryService.createDeployment().name(model.getName()).addInputStream(processName, in).deploy();
List<ProcessDefinition> list = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).list();
if (list.size() == 0) {
throw new HmitException(ErrorCode.ACT_DEPLOY_ERROR);
}
} catch (Exception e) {
throw new HmitException(ErrorCode.ACT_MODEL_IMG_ERROR, e);
}
}
/**
* 导出模型
*/
public void export(String id, HttpServletResponse response) {
try {
Model model = repositoryService.getModel(id);
BpmnJsonConverter jsonConverter = new BpmnJsonConverter();
JsonNode editorNode = new ObjectMapper().readTree(repositoryService.getModelEditorSource(model.getId()));
BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editorNode);
BpmnXMLConverter xmlConverter = new BpmnXMLConverter();
byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel);
ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes);
IOUtils.copy(in, response.getOutputStream());
String filename = bpmnModel.getMainProcess().getId() + ".bpmn20.xml";
response.setHeader("Content-Disposition", "attachment; filename=" + filename);
response.flushBuffer();
} catch (Exception e) {
throw new HmitException(ErrorCode.ACT_MODEL_EXPORT_ERROR, id);
}
}
/**
* 删除模型
*
* @param id 模型ID
*/
public void delete(String id) {
repositoryService.deleteModel(id);
}
public void deployImage(String deploymentId, HttpServletResponse response) {
List<String> names = repositoryService.getDeploymentResourceNames(deploymentId);
String imageName = null;
for (String name : names) {
if (name.indexOf(".png") >= 0) {
imageName = name;
break;
}
}
InputStream in = null;
InputStream in1 = null;
try {
if (StringUtils.isNotEmpty(imageName)) {
in = repositoryService.getResourceAsStream(deploymentId, imageName);
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(imageName, "UTF-8"));
response.setHeader("Content-Type", "image/png");
response.setHeader("Cache-Control", "no-store, no-cache");
BufferedImage bufferedImage = ImageIO.read(in);
ImageIO.write(bufferedImage, "png", response.getOutputStream());
} else {
response.getWriter().println("No image Info!");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (null != in) {
in.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}