Java Code Examples for org.flowable.task.api.Task#getExecutionId()

protected void setVariable(Task task, String name, Object value, RestVariableScope scope, boolean isNew) {
    // Create can only be done on new variables. Existing variables should
    // be updated using PUT
    boolean hasVariable = hasVariableOnScope(task, name, scope);
    if (isNew && hasVariable) {
        throw new FlowableException("Variable '" + name + "' is already present on task '" + task.getId() + "'.");
    }

    if (!isNew && !hasVariable) {
        throw new FlowableObjectNotFoundException("Task '" + task.getId() + "' does not have a variable with name: '" + name + "'.", null);
    }

    if (scope == RestVariableScope.LOCAL) {
        taskService.setVariableLocal(task.getId(), name, value);
    } else {
        if (task.getExecutionId() != null) {
            // Explicitly set on execution, setting non-local variable on
            // task will override local-variable if exists
            runtimeService.setVariable(task.getExecutionId(), name, value);
        } else {
            // Standalone task, no global variables possible
            throw new FlowableIllegalArgumentException("Cannot set global variable '" + name + "' on task '" + task.getId() + "', task is not part of process.");
        }
    }
}
 

@ApiOperation(value = "Delete a task", tags = { "Tasks" })
@ApiImplicitParams({
        @ApiImplicitParam(name = "cascadeHistory", dataType = "string", value = "Whether or not to delete the HistoricTask instance when deleting the task (if applicable). If not provided, this value defaults to false.", paramType = "query"),
        @ApiImplicitParam(name = "deleteReason", dataType = "string", value = "Reason why the task is deleted. This value is ignored when cascadeHistory is true.", paramType = "query")
})
@ApiResponses(value = {
        @ApiResponse(code = 204, message = "Indicates the task was found and has been deleted. Response-body is intentionally empty."),
        @ApiResponse(code = 403, message = "Indicates the requested task cannot be deleted because it’s part of a workflow."),
        @ApiResponse(code = 404, message = "Indicates the requested task was not found.")
})
@DeleteMapping(value = "/cmmn-runtime/tasks/{taskId}")
public void deleteTask(@ApiParam(name = "taskId") @PathVariable String taskId, @ApiParam(hidden = true) @RequestParam(value = "cascadeHistory", required = false) Boolean cascadeHistory,
        @ApiParam(hidden = true) @RequestParam(value = "deleteReason", required = false) String deleteReason, HttpServletResponse response) {

    Task taskToDelete = getTaskFromRequest(taskId);
    if (taskToDelete.getScopeId() != null && ScopeTypes.CMMN.equals(taskToDelete.getScopeType())) {
        // Can't delete a task that is part of a case instance
        throw new FlowableForbiddenException("Cannot delete a task that is part of a case instance.");
    } else if (taskToDelete.getExecutionId() != null) {
        throw new FlowableForbiddenException("Cannot delete a task that is part of a process instance.");
    }
    
    if (restApiInterceptor != null) {
        restApiInterceptor.deleteTask(taskToDelete);
    }

    if (cascadeHistory != null) {
        // Ignore delete-reason since the task-history (where the reason is
        // recorded) will be deleted anyway
        taskService.deleteTask(taskToDelete.getId(), cascadeHistory);
    } else {
        // Delete with delete-reason
        taskService.deleteTask(taskToDelete.getId(), deleteReason);
    }
    response.setStatus(HttpStatus.NO_CONTENT.value());
}
 

@ApiOperation(value = "Delete a task", tags = { "Tasks" })
@ApiImplicitParams({
        @ApiImplicitParam(name = "cascadeHistory", dataType = "string", value = "Whether or not to delete the HistoricTask instance when deleting the task (if applicable). If not provided, this value defaults to false.", paramType = "query"),
        @ApiImplicitParam(name = "deleteReason", dataType = "string", value = "Reason why the task is deleted. This value is ignored when cascadeHistory is true.", paramType = "query")
})
@ApiResponses(value = {
        @ApiResponse(code = 204, message = "Indicates the task was found and has been deleted. Response-body is intentionally empty."),
        @ApiResponse(code = 403, message = "Indicates the requested task cannot be deleted because it’s part of a workflow."),
        @ApiResponse(code = 404, message = "Indicates the requested task was not found.")
})
@DeleteMapping(value = "/runtime/tasks/{taskId}")
public void deleteTask(@ApiParam(name = "taskId") @PathVariable String taskId, @ApiParam(hidden = true) @RequestParam(value = "cascadeHistory", required = false) Boolean cascadeHistory,
        @ApiParam(hidden = true) @RequestParam(value = "deleteReason", required = false) String deleteReason, HttpServletResponse response) {

    Task taskToDelete = getTaskFromRequest(taskId);
    if (taskToDelete.getExecutionId() != null) {
        // Can not delete a task that is part of a process instance
        throw new FlowableForbiddenException("Cannot delete a task that is part of a process instance.");
    } else if (taskToDelete.getScopeId() != null && ScopeTypes.CMMN.equals(taskToDelete.getScopeType())) {
        throw new FlowableForbiddenException("Cannot delete a task that is part of a case instance.");
    }

    if (restApiInterceptor != null) {
        restApiInterceptor.deleteTask(taskToDelete);
    }

    if (cascadeHistory != null) {
        // Ignore delete-reason since the task-history (where the reason is
        // recorded) will be deleted anyway
        taskService.deleteTask(taskToDelete.getId(), cascadeHistory);
    } else {
        // Delete with delete-reason
        taskService.deleteTask(taskToDelete.getId(), deleteReason);
    }
    response.setStatus(HttpStatus.NO_CONTENT.value());
}
 

protected boolean hasVariableOnScope(Task task, String variableName, RestVariableScope scope) {
    boolean variableFound = false;

    if (scope == RestVariableScope.GLOBAL) {
        if (task.getExecutionId() != null && runtimeService.hasVariable(task.getExecutionId(), variableName)) {
            variableFound = true;
        }

    } else if (scope == RestVariableScope.LOCAL) {
        if (taskService.hasVariableLocal(task.getId(), variableName)) {
            variableFound = true;
        }
    }
    return variableFound;
}
 

protected void addGlobalVariables(Task task, Map<String, RestVariable> variableMap) {
    if (task.getExecutionId() != null) {
        Map<String, Object> rawVariables = runtimeService.getVariables(task.getExecutionId());
        List<RestVariable> globalVariables = restResponseFactory.createRestVariables(rawVariables, task.getId(), RestResponseFactory.VARIABLE_TASK, RestVariableScope.GLOBAL);

        // Overlay global variables over local ones. In case they are present the values are not overridden,
        // since local variables get precedence over global ones at all times.
        for (RestVariable var : globalVariables) {
            if (!variableMap.containsKey(var.getName())) {
                variableMap.put(var.getName(), var);
            }
        }
    }
}
 

@Override
public void deleteAttachmentsByTaskId(String taskId) {
    checkHistoryEnabled();
    List<AttachmentEntity> attachments = findAttachmentsByTaskId(taskId);
    FlowableEventDispatcher eventDispatcher = getEventDispatcher();
    boolean dispatchEvents = eventDispatcher != null && eventDispatcher.isEnabled();

    String processInstanceId = null;
    String processDefinitionId = null;
    String executionId = null;

    if (dispatchEvents && attachments != null && !attachments.isEmpty()) {
        // Forced to fetch the task to get hold of the process definition
        // for event-dispatching, if available
        Task task = CommandContextUtil.getTaskService().getTask(taskId);
        if (task != null) {
            processDefinitionId = task.getProcessDefinitionId();
            processInstanceId = task.getProcessInstanceId();
            executionId = task.getExecutionId();
        }
    }

    for (Attachment attachment : attachments) {
        String contentId = attachment.getContentId();
        if (contentId != null) {
            getByteArrayEntityManager().deleteByteArrayById(contentId);
        }

        dataManager.delete((AttachmentEntity) attachment);

        if (dispatchEvents) {
            eventDispatcher.dispatchEvent(
                    FlowableEventBuilder.createEntityEvent(FlowableEngineEventType.ENTITY_DELETED, attachment, executionId, processInstanceId, processDefinitionId));
        }
    }
}
 

@ApiOperation(value = "Create new variables on a task", tags = { "Tasks", "Task Variables" },
        notes = "This endpoint can be used in 2 ways: By passing a JSON Body (RestVariable or an Array of RestVariable) or by passing a multipart/form-data Object.\n"
                + "It is possible to create simple (non-binary) variable or list of variables or new binary variable \n"
                + "Any number of variables can be passed into the request body array.\n"
                + "NB: Swagger V2 specification does not support this use case that is why this endpoint might be buggy/incomplete if used with other tools.")
@ApiImplicitParams({
        @ApiImplicitParam(name = "body", type = "org.flowable.rest.service.api.engine.variable.RestVariable", value = "Create a variable on a task", paramType = "body", example = "{\n" +
                "    \"name\":\"intProcVar\"\n" +
                "    \"type\":\"integer\"\n" +
                "    \"value\":123,\n" +
                " }"),
        @ApiImplicitParam(name = "name", value = "Required name of the variable", dataType = "string", paramType = "form", example = "Simple content item"),
        @ApiImplicitParam(name = "type", value = "Type of variable that is created. If omitted, reverts to raw JSON-value type (string, boolean, integer or double)",dataType = "string", paramType = "form", example = "integer"),
        @ApiImplicitParam(name = "scope",value = "Scope of variable that is created. If omitted, local is assumed.", dataType = "string",  paramType = "form", example = "local")
})
@ApiResponses(value = {
        @ApiResponse(code = 201, message = "Indicates the variables were created and the result is returned."),
        @ApiResponse(code = 400, message = "Indicates the name of a variable to create was missing or that an attempt is done to create a variable on a standalone task (without a process associated) with scope global or an empty array of variables was included in the request or request did not contain an array of variables. Status message provides additional information."),
        @ApiResponse(code = 404, message = "Indicates the requested task was not found."),
        @ApiResponse(code = 409, message = "Indicates the task already has a variable with the given name. Use the PUT method to update the task variable instead."),
        @ApiResponse(code = 415, message = "Indicates the serializable data contains an object for which no class is present in the JVM running the Flowable engine and therefore cannot be deserialized.")
})
@PostMapping(value = "/runtime/tasks/{taskId}/variables", produces = "application/json", consumes = {"application/json", "multipart/form-data"})
public Object createTaskVariable(@ApiParam(name = "taskId") @PathVariable String taskId, HttpServletRequest request, HttpServletResponse response) {

    Task task = getTaskFromRequest(taskId);

    Object result = null;
    if (request instanceof MultipartHttpServletRequest) {
        result = setBinaryVariable((MultipartHttpServletRequest) request, task, true);
    } else {

        List<RestVariable> inputVariables = new ArrayList<>();
        List<RestVariable> resultVariables = new ArrayList<>();
        result = resultVariables;

        try {
            @SuppressWarnings("unchecked")
            List<Object> variableObjects = (List<Object>) objectMapper.readValue(request.getInputStream(), List.class);
            for (Object restObject : variableObjects) {
                RestVariable restVariable = objectMapper.convertValue(restObject, RestVariable.class);
                inputVariables.add(restVariable);
            }
        } catch (Exception e) {
            throw new FlowableIllegalArgumentException("Failed to serialize to a RestVariable instance", e);
        }

        if (inputVariables == null || inputVariables.size() == 0) {
            throw new FlowableIllegalArgumentException("Request did not contain a list of variables to create.");
        }

        RestVariableScope sharedScope = null;
        RestVariableScope varScope = null;
        Map<String, Object> variablesToSet = new HashMap<>();

        for (RestVariable var : inputVariables) {
            // Validate if scopes match
            varScope = var.getVariableScope();
            if (var.getName() == null) {
                throw new FlowableIllegalArgumentException("Variable name is required");
            }

            if (varScope == null) {
                varScope = RestVariableScope.LOCAL;
            }
            if (sharedScope == null) {
                sharedScope = varScope;
            }
            if (varScope != sharedScope) {
                throw new FlowableIllegalArgumentException("Only allowed to update multiple variables in the same scope.");
            }

            if (hasVariableOnScope(task, var.getName(), varScope)) {
                throw new FlowableConflictException("Variable '" + var.getName() + "' is already present on task '" + task.getId() + "'.");
            }

            Object actualVariableValue = restResponseFactory.getVariableValue(var);
            variablesToSet.put(var.getName(), actualVariableValue);
            resultVariables.add(restResponseFactory.createRestVariable(var.getName(), actualVariableValue, varScope, task.getId(), RestResponseFactory.VARIABLE_TASK, false));
        }

        if (!variablesToSet.isEmpty()) {
            if (sharedScope == RestVariableScope.LOCAL) {
                taskService.setVariablesLocal(task.getId(), variablesToSet);
            } else {
                if (task.getExecutionId() != null) {
                    // Explicitly set on execution, setting non-local
                    // variables on task will override local-variables if
                    // exists
                    runtimeService.setVariables(task.getExecutionId(), variablesToSet);
                } else {
                    // Standalone task, no global variables possible
                    throw new FlowableIllegalArgumentException("Cannot set global variables on task '" + task.getId() + "', task is not part of process.");
                }
            }
        }
    }

    response.setStatus(HttpStatus.CREATED.value());
    return result;
}
 

/**
 * Test querying tasks. GET runtime/tasks
 */
@Test
public void testQueryTasksWithPaging() throws Exception {
    try {
        Calendar adhocTaskCreate = Calendar.getInstance();
        adhocTaskCreate.set(Calendar.MILLISECOND, 0);

        processEngineConfiguration.getClock().setCurrentTime(adhocTaskCreate.getTime());
        List<String> taskIdList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Task adhocTask = taskService.newTask();
            adhocTask.setAssignee("gonzo");
            adhocTask.setOwner("owner");
            adhocTask.setDelegationState(DelegationState.PENDING);
            adhocTask.setDescription("Description one");
            adhocTask.setName("Name one");
            adhocTask.setDueDate(adhocTaskCreate.getTime());
            adhocTask.setPriority(100);
            taskService.saveTask(adhocTask);
            taskService.addUserIdentityLink(adhocTask.getId(), "misspiggy", IdentityLinkType.PARTICIPANT);
            taskIdList.add(adhocTask.getId());
        }
        Collections.sort(taskIdList);

        // Check filter-less to fetch all tasks
        String url = RestUrls.createRelativeResourceUrl(RestUrls.URL_TASK_QUERY);
        ObjectNode requestNode = objectMapper.createObjectNode();
        String[] taskIds = new String[] { taskIdList.get(0), taskIdList.get(1), taskIdList.get(2) };
        assertResultsPresentInPostDataResponse(url + "?size=3&sort=id&order=asc", requestNode, taskIds);

        taskIds = new String[] { taskIdList.get(4), taskIdList.get(5), taskIdList.get(6), taskIdList.get(7) };
        assertResultsPresentInPostDataResponse(url + "?start=4&size=4&sort=id&order=asc", requestNode, taskIds);

        taskIds = new String[] { taskIdList.get(8), taskIdList.get(9) };
        assertResultsPresentInPostDataResponse(url + "?start=8&size=10&sort=id&order=asc", requestNode, taskIds);

    } finally {
        // Clean adhoc-tasks even if test fails
        List<Task> tasks = taskService.createTaskQuery().list();
        for (Task task : tasks) {
            if (task.getExecutionId() == null) {
                taskService.deleteTask(task.getId(), true);
            }
        }
    }
}