update - 处理流程已结束后添加评论的逻辑
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package org.flowable.engine.impl.cmd;
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import org.flowable.common.engine.api.FlowableException;
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import org.flowable.common.engine.api.FlowableObjectNotFoundException;
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import org.flowable.common.engine.api.delegate.event.FlowableEngineEventType;
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import org.flowable.common.engine.api.delegate.event.FlowableEventDispatcher;
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import org.flowable.common.engine.impl.identity.Authentication;
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import org.flowable.common.engine.impl.interceptor.Command;
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import org.flowable.common.engine.impl.interceptor.CommandContext;
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import org.flowable.common.engine.impl.persistence.entity.ByteArrayEntity;
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import org.flowable.common.engine.impl.util.IoUtil;
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import org.flowable.engine.compatibility.Flowable5CompatibilityHandler;
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import org.flowable.engine.delegate.event.impl.FlowableEventBuilder;
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import org.flowable.engine.impl.cfg.ProcessEngineConfigurationImpl;
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import org.flowable.engine.impl.persistence.entity.AttachmentEntity;
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import org.flowable.engine.impl.persistence.entity.ExecutionEntity;
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import org.flowable.engine.impl.util.CommandContextUtil;
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import org.flowable.engine.impl.util.Flowable5Util;
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import org.flowable.engine.runtime.ProcessInstance;
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import org.flowable.engine.task.Attachment;
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import org.flowable.task.api.Task;
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import org.flowable.task.service.impl.persistence.entity.TaskEntity;
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import java.io.InputStream;
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/**
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* 覆盖 Flowable 自带的 CreateAttachmentCmd, 由于 Flowable 5 的实现导致异常，需要覆盖
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*
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* @author Tom Baeyens
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* @author Joram Barrez
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*/
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public class CreateAttachmentCmd implements Command<Attachment> {
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protected String attachmentType;
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protected String taskId;
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protected String processInstanceId;
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protected String attachmentName;
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protected String attachmentDescription;
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protected InputStream content;
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protected String url;
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public CreateAttachmentCmd(String attachmentType, String taskId, String processInstanceId, String attachmentName,
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String attachmentDescription, InputStream content, String url) {
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this.attachmentType = attachmentType;
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this.taskId = taskId;
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this.processInstanceId = processInstanceId;
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this.attachmentName = attachmentName;
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this.attachmentDescription = attachmentDescription;
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this.content = content;
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this.url = url;
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}
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@Override
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public Attachment execute(CommandContext commandContext) {
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if (taskId != null) {
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TaskEntity task = verifyTaskParameters(commandContext);
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if (task.getProcessDefinitionId() != null && Flowable5Util.isFlowable5ProcessDefinitionId(commandContext,
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task.getProcessDefinitionId())) {
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Flowable5CompatibilityHandler compatibilityHandler = Flowable5Util.getFlowable5CompatibilityHandler();
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return compatibilityHandler.createAttachment(attachmentType, taskId, processInstanceId,
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attachmentName, attachmentDescription, content, url);
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}
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}
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// 覆盖类的处理
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// if (processInstanceId != null) {
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// ExecutionEntity execution = verifyExecutionParameters(commandContext);
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// if (Flowable5Util.isFlowable5ProcessDefinitionId(commandContext, execution
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// .getProcessDefinitionId())) {
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// Flowable5CompatibilityHandler compatibilityHandler = Flowable5Util
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// .getFlowable5CompatibilityHandler();
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// return compatibilityHandler.createAttachment(attachmentType, taskId, processInstanceId,
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// attachmentName, attachmentDescription, content, url);
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// }
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// }
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ProcessEngineConfigurationImpl processEngineConfiguration =
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CommandContextUtil.getProcessEngineConfiguration(commandContext);
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AttachmentEntity attachment = processEngineConfiguration.getAttachmentEntityManager().create();
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attachment.setName(attachmentName);
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attachment.setProcessInstanceId(processInstanceId);
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attachment.setTaskId(taskId);
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attachment.setDescription(attachmentDescription);
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attachment.setType(attachmentType);
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attachment.setUrl(url);
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attachment.setUserId(Authentication.getAuthenticatedUserId());
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attachment.setTime(processEngineConfiguration.getClock().getCurrentTime());
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processEngineConfiguration.getAttachmentEntityManager().insert(attachment, false);
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if (content != null) {
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byte[] bytes = IoUtil.readInputStream(content, attachmentName);
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ByteArrayEntity byteArray = processEngineConfiguration.getByteArrayEntityManager().create();
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byteArray.setBytes(bytes);
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processEngineConfiguration.getByteArrayEntityManager().insert(byteArray);
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attachment.setContentId(byteArray.getId());
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attachment.setContent(byteArray);
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}
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ExecutionEntity processInstance = null;
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if (processInstanceId != null) {
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processInstance = processEngineConfiguration.getExecutionEntityManager().findById(processInstanceId);
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}
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TaskEntity task = null;
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if (taskId != null) {
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task = processEngineConfiguration.getTaskServiceConfiguration().getTaskService().getTask(taskId);
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}
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processEngineConfiguration.getHistoryManager().createAttachmentComment(task, processInstance, attachmentName,
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true);
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FlowableEventDispatcher eventDispatcher = processEngineConfiguration.getEventDispatcher();
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if (eventDispatcher != null && eventDispatcher.isEnabled()) {
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// Forced to fetch the process-instance to associate the right
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// process definition
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String processDefinitionId = null;
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if (attachment.getProcessInstanceId() != null) {
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ExecutionEntity process =
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processEngineConfiguration.getExecutionEntityManager().findById(processInstanceId);
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if (process != null) {
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processDefinitionId = process.getProcessDefinitionId();
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}
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}
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eventDispatcher.dispatchEvent(FlowableEventBuilder.createEntityEvent(FlowableEngineEventType.ENTITY_CREATED, attachment,
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processInstanceId, processInstanceId, processDefinitionId),
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processEngineConfiguration.getEngineCfgKey());
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eventDispatcher.dispatchEvent(FlowableEventBuilder.createEntityEvent(FlowableEngineEventType.ENTITY_INITIALIZED, attachment,
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processInstanceId, processInstanceId, processDefinitionId),
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processEngineConfiguration.getEngineCfgKey());
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}
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return attachment;
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}
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protected TaskEntity verifyTaskParameters(CommandContext commandContext) {
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ProcessEngineConfigurationImpl processEngineConfiguration =
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CommandContextUtil.getProcessEngineConfiguration(commandContext);
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TaskEntity task = processEngineConfiguration.getTaskServiceConfiguration().getTaskService().getTask(taskId);
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if (task == null) {
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throw new FlowableObjectNotFoundException("Cannot find task with id " + taskId, Task.class);
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}
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if (task.isSuspended()) {
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throw new FlowableException("It is not allowed to add an attachment to a suspended task");
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}
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return task;
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}
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protected ExecutionEntity verifyExecutionParameters(CommandContext commandContext) {
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ExecutionEntity execution =
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CommandContextUtil.getExecutionEntityManager(commandContext).findById(processInstanceId);
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if (execution == null) {
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throw new FlowableObjectNotFoundException("Process instance " + processInstanceId + " doesn't exist",
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ProcessInstance.class);
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}
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if (execution.isSuspended()) {
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throw new FlowableException("It is not allowed to add an attachment to a suspended process instance");
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}
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return execution;
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}
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}
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