Examples with Variable org.wso2.siddhi.query.api.expression.Variable used on opensource projects

Example 61 with Variable

use of org.wso2.siddhi.query.api.expression.Variable in project carbon-business-process by wso2.

the class ProcessInstanceService method getVariableFromRequest.

public RestVariable getVariableFromRequest(Execution execution, String variableName, String scope, boolean includeBinary) {
    boolean variableFound = false;
    Object value = null;
    if (execution == null) {
        throw new ActivitiObjectNotFoundException("Could not find an execution", Execution.class);
    }
    RuntimeService runtimeService = BPMNOSGIService.getRuntimeService();
    RestVariable.RestVariableScope variableScope = RestVariable.getScopeFromString(scope);
    if (variableScope == null) {
        // First, check local variables (which have precedence when no scope is supplied)
        if (runtimeService.hasVariableLocal(execution.getId(), variableName)) {
            value = runtimeService.getVariableLocal(execution.getId(), variableName);
            variableScope = RestVariable.RestVariableScope.LOCAL;
            variableFound = true;
        } else {
            if (execution.getParentId() != null) {
                value = runtimeService.getVariable(execution.getParentId(), variableName);
                variableScope = RestVariable.RestVariableScope.GLOBAL;
                variableFound = true;
            }
        }
    } else if (variableScope == RestVariable.RestVariableScope.GLOBAL) {
        // Use parent to get variables
        if (execution.getParentId() != null) {
            value = runtimeService.getVariable(execution.getParentId(), variableName);
            variableScope = RestVariable.RestVariableScope.GLOBAL;
            variableFound = true;
        }
    } else if (variableScope == RestVariable.RestVariableScope.LOCAL) {
        value = runtimeService.getVariableLocal(execution.getId(), variableName);
        variableScope = RestVariable.RestVariableScope.LOCAL;
        variableFound = true;
    }
    if (!variableFound) {
        throw new ActivitiObjectNotFoundException("Execution '" + execution.getId() + "' doesn't have a variable with name: '" + variableName + "'.", VariableInstanceEntity.class);
    } else {
        return constructRestVariable(variableName, value, variableScope, execution.getId(), includeBinary);
    }
}

Example 62 with Variable

use of org.wso2.siddhi.query.api.expression.Variable in project carbon-business-process by wso2.

the class ProcessInstanceService method getVariableDataByteArray.

protected byte[] getVariableDataByteArray(Execution execution, String variableName, String scope, Response.ResponseBuilder responseBuilder) {
    try {
        byte[] result;
        RestVariable variable = getVariableFromRequest(execution, variableName, scope, true);
        if (RestResponseFactory.BYTE_ARRAY_VARIABLE_TYPE.equals(variable.getType())) {
            result = (byte[]) variable.getValue();
            responseBuilder.type(MediaType.APPLICATION_OCTET_STREAM);
        } else if (RestResponseFactory.SERIALIZABLE_VARIABLE_TYPE.equals(variable.getType())) {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutputStream outputStream = new ObjectOutputStream(buffer);
            outputStream.writeObject(variable.getValue());
            outputStream.close();
            result = buffer.toByteArray();
            responseBuilder.type("application/x-java-serialized-object");
        } else {
            throw new ActivitiObjectNotFoundException("The variable does not have a binary data stream.", null);
        }
        return result;
    } catch (IOException ioe) {
        throw new ActivitiException("Error getting variable " + variableName, ioe);
    }
}

Example 63 with Variable

use of org.wso2.siddhi.query.api.expression.Variable in project carbon-business-process by wso2.

the class ExecutionService method deleteVariable.

@DELETE
@Path("/{executionId}/variables/{variableName}")
@Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public Response deleteVariable(@PathParam("executionId") String executionId, @PathParam("variableName") String variableName) {
    String scope = uriInfo.getQueryParameters().getFirst("scope");
    Execution execution = getExecutionFromRequest(executionId);
    // Determine scope
    RestVariable.RestVariableScope variableScope = RestVariable.RestVariableScope.LOCAL;
    if (scope != null) {
        variableScope = RestVariable.getScopeFromString(scope);
    }
    if (!hasVariableOnScope(execution, variableName, variableScope)) {
        throw new ActivitiObjectNotFoundException("Execution '" + execution.getId() + "' doesn't have a variable '" + variableName + "' in scope " + variableScope.name().toLowerCase(), VariableInstanceEntity.class);
    }
    RuntimeService runtimeService = BPMNOSGIService.getRuntimeService();
    if (variableScope == RestVariable.RestVariableScope.LOCAL) {
        runtimeService.removeVariableLocal(execution.getId(), variableName);
    } else {
        // Safe to use parentId, as the hasVariableOnScope would have stopped a global-var update on a root-execution
        runtimeService.removeVariable(execution.getParentId(), variableName);
    }
    return Response.ok().status(Response.Status.NO_CONTENT).build();
}

Example 64 with Variable

use of org.wso2.siddhi.query.api.expression.Variable in project carbon-business-process by wso2.

the class WorkflowTaskService method deleteVariable.

@DELETE
@Path("/{taskId}/variables/{variableName}")
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public Response deleteVariable(@PathParam("taskId") String taskId, @PathParam("variableName") String variableName) {
    String scopeString = uriInfo.getQueryParameters().getFirst("scope");
    Task task = getTaskFromRequest(taskId);
    // Determine scope
    RestVariable.RestVariableScope scope = RestVariable.RestVariableScope.LOCAL;
    if (scopeString != null) {
        scope = RestVariable.getScopeFromString(scopeString);
    }
    if (!hasVariableOnScope(task, variableName, scope)) {
        throw new ActivitiObjectNotFoundException("Task '" + task.getId() + "' doesn't have a variable '" + variableName + "' in scope " + scope.name().toLowerCase(), VariableInstanceEntity.class);
    }
    RuntimeService runtimeService = BPMNOSGIService.getRuntimeService();
    TaskService taskService = BPMNOSGIService.getTaskService();
    if (scope == RestVariable.RestVariableScope.LOCAL) {
        taskService.removeVariableLocal(task.getId(), variableName);
    } else {
        // Safe to use executionId, as the hasVariableOnScope whould have stopped a global-var update on standalone task
        runtimeService.removeVariable(task.getExecutionId(), variableName);
    }
    return Response.ok().status(Response.Status.NO_CONTENT).build();
}

Example 65 with Variable

use of org.wso2.siddhi.query.api.expression.Variable in project carbon-business-process by wso2.

the class WorkflowTaskService method createTaskVariable.

@POST
@Path("/{taskId}/variables")
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
@Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public Response createTaskVariable(@PathParam("taskId") String taskId, @Context HttpServletRequest httpServletRequest) {
    Task task = getTaskFromRequest(taskId);
    List<RestVariable> inputVariables = new ArrayList<>();
    List<RestVariable> resultVariables = new ArrayList<>();
    Response.ResponseBuilder responseBuilder = Response.ok();
    try {
        if (Utils.isApplicationJsonRequest(httpServletRequest)) {
            try {
                @SuppressWarnings("unchecked") List<Object> variableObjects = (List<Object>) new ObjectMapper().readValue(httpServletRequest.getInputStream(), List.class);
                for (Object restObject : variableObjects) {
                    RestVariable restVariable = new ObjectMapper().convertValue(restObject, RestVariable.class);
                    inputVariables.add(restVariable);
                }
            } catch (IOException e) {
                throw new ActivitiIllegalArgumentException("request body could not be transformed to a RestVariable " + "instance.", e);
            }
        } else if (Utils.isApplicationXmlRequest(httpServletRequest)) {
            JAXBContext jaxbContext = null;
            try {
                jaxbContext = JAXBContext.newInstance(RestVariableCollection.class);
                Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
                RestVariableCollection restVariableCollection = (RestVariableCollection) jaxbUnmarshaller.unmarshal(getXMLReader(httpServletRequest.getInputStream()));
                if (restVariableCollection == null) {
                    throw new ActivitiIllegalArgumentException("xml request body could not be transformed to a " + "RestVariable Collection instance.");
                }
                List<RestVariable> restVariableList = restVariableCollection.getRestVariables();
                if (restVariableList.size() == 0) {
                    throw new ActivitiIllegalArgumentException("xml request body could not identify any rest " + "variables to be updated");
                }
                for (RestVariable restVariable : restVariableList) {
                    inputVariables.add(restVariable);
                }
            } catch (JAXBException | IOException e) {
                throw new ActivitiIllegalArgumentException("xml request body could not be transformed to a " + "RestVariable instance.", e);
            }
        }
    } catch (Exception e) {
        throw new ActivitiIllegalArgumentException("Failed to serialize to a RestVariable instance", e);
    }
    if (inputVariables.size() == 0) {
        throw new ActivitiIllegalArgumentException("Request didn't contain a list of variables to create.");
    }
    RestVariable.RestVariableScope sharedScope = null;
    RestVariable.RestVariableScope varScope = null;
    Map<String, Object> variablesToSet = new HashMap<>();
    RestResponseFactory restResponseFactory = new RestResponseFactory();
    for (RestVariable var : inputVariables) {
        // Validate if scopes match
        varScope = var.getVariableScope();
        if (var.getName() == null) {
            throw new ActivitiIllegalArgumentException("Variable name is required");
        }
        if (varScope == null) {
            varScope = RestVariable.RestVariableScope.LOCAL;
        }
        if (sharedScope == null) {
            sharedScope = varScope;
        }
        if (varScope != sharedScope) {
            throw new ActivitiIllegalArgumentException("Only allowed to update multiple variables in the same scope.");
        }
        if (hasVariableOnScope(task, var.getName(), varScope)) {
            throw new BPMNConflictException("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, uriInfo.getBaseUri().toString()));
    }
    RuntimeService runtimeService = BPMNOSGIService.getRuntimeService();
    TaskService taskService = BPMNOSGIService.getTaskService();
    if (!variablesToSet.isEmpty()) {
        if (sharedScope == RestVariable.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 ActivitiIllegalArgumentException("Cannot set global variables on task '" + task.getId() + "', task is not part of process.");
            }
        }
    }
    RestVariableCollection restVariableCollection = new RestVariableCollection();
    restVariableCollection.setRestVariables(resultVariables);
    responseBuilder.entity(restVariableCollection);
    return responseBuilder.status(Response.Status.CREATED).build();
}